[Technical Field]
[0001] The present disclosure relates to an antenna RF module and an antenna apparatus including
the antenna RF modules and, more particularly, to an antenna RF module in which a
radiation element module and an RF element are completely separated from a main board
and are arranged to be exposed to outside air in front, and an antenna apparatus including
the antenna RF modules. The antenna RF module is capable of solving the difficulty
in achieving a design for dissipating heat toward the front of a radiation element
in the related art.
[Background Art]
[0002] An antenna of a base station, such as a relay station, that is used in a mobile communication
system has various shapes and structures. Normally, the antenna has a structure in
which a multiplicity of radiation elements are suitably arranged on at least one reflection
plate that stands upright in a lengthwise direction thereof.
[0003] In recent years, research has been actively conducted in order to satisfy requirements
for high performance of an antenna based on Multiple Input Multiple Output (MIMO),
and at the same time to achieve a miniaturized, lightweight and low-cost structure.
Particularly, in a case where a patch-type radiation element that realizes linear
polarization or circular polarization is used in an antenna apparatus, normally, a
technique is widely used in which the radiation element made of a dielectric substrate
of a plastic or ceramic material is plated and is combined with a printed circuit
board (PCB) by soldering.
[0004] FIG. 1 is an exploded perspective view illustrating an example of an antenna apparatus
1 in the related art.
[0005] In the antenna apparatus 1, as illustrated in FIG. 1, a multiplicity of radiation
elements 35 are arranged to be exposed toward a direction of a front surface of an
antenna housing main body 10 that corresponds to a beam output direction, in such
a manner that a beam is output in a desired direction and that beamforming is facilitated,
and a radome 50 is mounted on a front end portion of the antenna housing main body
10 with the multiplicity of radiation elements 35 in between, in order to provide
protection from an outside environment.
[0006] More specifically, the antenna apparatus 1 in the related art includes the antenna
housing main body 10 having the form of a rectangular parallelepiped-shaped casing
with a small thickness that is open at the front surface thereof and that has a multiplicity
of heat dissipation pins 11 integrally formed on the rear surface thereof, a main
board 20 arranged in a stacked manner on a rear surface of the antenna housing main
body 10 inside the antenna housing main body 10, and an antenna board 30 arranged
in a stacked manner on a front surface of the antenna housing main body 10 inside
the antenna housing main body 10.
[0007] A patch-type radiation element or dipole-type radiation elements 35 may be mounted
in a front surface of the antenna board 30, and a radome 50 that protects components
inside the antenna housing main body 10 from the outside and facilitates radiation
from the radiation elements 35 may be installed on a front surface of the antenna
housing main body 10.
[0008] However, in an example of the antenna apparatus 1 in the related art, a front portion
of the antenna housing main body 10 is all closed by the radome 50 as a single unit.
For this reason, the radome 50 itself serves as an obstacle that interrupts dissipation
of heat of the antenna apparatus 1 toward a front direction. At this point, in a case
where the radome 5 is removed and where the radiation elements 35 are exposed to the
outside, the antenna board 30 is also necessarily exposed to the outside. Thus, the
antenna board 30 may be less protected from a surrounding environment.
[0009] Furthermore, the antenna board 30 is made of a FR-4 epoxy material, having low thermal
conductivity, that is used as a material for a PCB. As is the case with the radome
50, a front portion of an installation space (not illustrated) in which a main board
is installed and in which heat is substantially generated is all closed. Thus, a problem
occurs in that a design for heat dissipation toward a front direction is difficult
to achieve.
[0010] For this reason, analog amplification elements, as well as digital elements, have
to be all concentratedly mounted on a rear surface in a heat dissipation direction
of the main board, rather than a front surface thereof. Thus, a space for heat dissipation
is limited. There occurs a problem in that overall heat dissipation performance of
the antenna apparatus 1 is decreased.
[0011] KR 2020 0132659 A discloses the preamble of claim 1 and illustrates for example an antenna device that
includes: a main housing in which an inner space is formed so that a main board is
embedded, and a plurality of radiating fins are provided on an outer surface thereof;
a cover housing provided to shield the inner space of the main housing and provided
with a plurality of radiating fins on the outer surface; and a plurality of unit antenna
blocks which are detachably coupled to occupy a portion of the outer surface of the
cover housing, and in which an antenna substrate having at least one antenna element
and at least one antenna filter are combined therein. The plurality of unit antenna
blocks are signal-connected to the main board via at least one connecting card, so
that the implementation of a dual band is possible and effective heat radiation can
be enabled.
CN 210 723 354 U relates to an an active antenna unit for a base station and an antenna unit. The
active antenna unit for the base station comprises a shell, a power amplifier board
and a filter assembly, wherein the shell defines an accommodating cavity with an opening
at one end; the power amplifier board is arranged in the accommodating cavity; the
filter assembly is arranged in the accommodating cavity and covers the power amplifier
board so as to carry out electromagnetic shielding on the power amplifier board.
[Summary of Invention]
[Technical Problem]
[0012] An object of the present disclosure, which is contrived to solve the above-mentioned
problems, is to provide an antenna RF module capable of being arranged in a front
direction in such a manner as to be exposed to outside air and thus dissipating heat
distributively to in front of and in back of a mobile communication system, and an
antenna apparatus including the antenna RF modules. The antenna RF module is capable
of significantly improving performance in heat dissipation.
[0013] Another object of the present disclosure is to provide an antenna RF module including
a multiplicity of reflector grill pins that perform a function of grounding radiation
elements and, at the same time, perform a function of a reflector that blocks signal
interference with electrical elements in a rear direction, and an antenna apparatus
including the antenna RF modules.
[0014] Still another object of the present disclosure is to provide an antenna RF module
that is manufactured by modularly integrating an RF filter, as a single unit, a radiation
element module, as a single unit, and a radome cover, as a single unit, and is easily
modularly assembled to a front housing that separates an installation space in which
a main board is installed and an outside-air space in front, and an antenna apparatus
including the antenna RF modules.
[0015] Still another object of the present disclosure is to provide an antenna RF module
in which amplification-unit elements and a surge board that are mounted on a main
board in the related art are provided in such a manner as to be completely separated
from an installation space in which a main board is installed, or to be spaced apart
from the main board, and an antenna apparatus including the antenna RF modules. In
the antenna RF module, a design for simplifying components on front and rear surfaces
of the main board can be achieved.
[0016] The present disclosure is not limited to the above-mentioned objects. From the following
description, other objects not mentioned would be clearly understandable by a person
of ordinary skill in the art to which the present disclosure pertains.
[Solution to Problem]
[0017] The invention is defined in the independent claim. Further advantageous embodiments
are defined in the dependent claims.
[Advantageous Effects of Invention]
[0018] An antenna RF module, an antenna RF module assembly including the antenna RF modules,
and an antenna apparatus including the antenna RF module assembly according to first,
second, and third embodiments, respectively, of the present disclosure can achieve
various effects that follow.
[0019] Firstly, heat generated from heat generating elements of the antenna apparatus is
spatially separated. Thus, it is possible that the heat is distributively dissipated
toward a forward-backward direction of the antenna apparatus. Accordingly, the effect
of greatly improving performance in heat dissipation can be achieved.
[0020] Secondly, instead of an existing radome, as a single unit, that interrupts dissipation
of heat to in front of an antenna, a radome, as a single unit, that is combined on
a per-RF module basis is designed, thereby removing an obstacle to heat dissipation.
Accordingly, the effect of more effectively protecting a radiation element module
can be achieved.
[0021] Thirdly, RF-related amplification elements that are concentratedly mounted to the
side of a main board in the related art, along with an RF filter, are re-configured
as an RF module, and the outside-air space is positioned in front of a front housing.
Accordingly, the effect of greatly improving overall heat dissipation performance
of the antenna apparatus can be achieved.
[0022] Fourthly, the RF-related amplification elements (particularly, an RFIC sub-board)
are separated from the main board, and thus the number of layers of the main board
that is a multi-layer board is greatly reduced. Accordingly, the effect of reducing
the cost of manufacturing the main board can be achieved.
[0023] Fifthly, an RF-related component having frequency-dependence is configured as an
RF module. The RF modules are detachably combined with each other for signal transmission,
through a front housing that additionally has a heat dissipation function. In a case
where an individual RF-related component that constitutes the antenna apparatus is
defective and is damaged, only a corresponding RF module can be replaced. Accordingly,
the effect of making maintenance of the antenna apparatus facilitated can be achieved.
[0024] Sixthly, it is possible that heat is distributively dissipated in the antenna apparatus.
Therefore, the length and volume of a heat sink (a heat dissipation pin) integrally
formed on a rear surface of a rear housing can be reduced. Accordingly, the effect
of facilitating design for reducing product thickness can be achieved.
[0025] Seventhly, an RF filter and an amplification element module that constitute the RF
module are completely separated from each other in a forward-backward direction. Accordingly,
the effect of minimizing mutual thermal influence can be achieved.
[0026] The present disclosure is not limited to the above-mentioned effects. From the following
description, other effects not mentioned would be understandable by a person of ordinary
skill in the art to which the present disclosure pertains.
[Brief Description of Drawings]
[0027]
FIG. 1 is an exploded perspective view illustrating an example of an antenna apparatus
in the related art.
FIG. 2 is a perspective view illustrating an antenna apparatus according to a third
embodiment of the present disclosure.
FIG. 3 is an exploded perspective view illustrating the antenna apparatus in FIG.
2.
FIG. 4 is an exploded perspective view that is referred to for description of states
where an antenna RF module assembly is attached to or detached from a front housing.
FIG. 5 is an exploded perspective view illustrating a state where the front housing
and a rear housing are separated from each other.
FIG. 6 is an exploded perspective view illustrating a state where the front housing
is assembled to the rear housing.
FIG. 7 is a perspective view illustrating a removed state of a ventilation panel,
one of constituent elements in FIG. 2.
FIG. 8a and 8b are exploded perspective views each illustrating relationships in which
various boards are assembled to the rear housing.
FIG. 9 is an exploded perspective view illustrating a combined state of a surge sub-board,
one of the constituent elements in FIG. 2.
FIG. 10 is an exploded perspective view illustrating a position for combing an RFIC
sub-board, one of the constituent elements in FIG. 2.
FIG. 11 is an exploded perspective view illustrating a state where the RFIC sub-board
in FIG. 10 is combined with a rear surface of the front housing.
FIG. 12 is an exploded perspective view illustrating a state where an RF module, one
of the constituent elements in FIG. 2, is installed in the front housing.
FIG. 13 is an enlarged perspective view illustrating a portion of a front surface
of the front housing that the RF module is attached to and detached from, and a portion
of a rear surface of the RF module.
FIG. 14 is a cut-away perspective view illustrating a state where the RF module is
combined with a main board.
FIG. 15 is a perspective view illustrating the RF module as a single unit, one of
the constituent elements in FIG. 2.
FIG. 16 is an exploded perspective view illustrating the RF module, as a single unit,
in FIG. 15.
FIGS. 17a to 17d are exploded perspective views illustrating a state where a radiation
element module, an RF module, and an amplification element module, which constitute
the RF module, are installed.
FIG. 18 is an exploded perspective view illustrating a state where a radome, one of
constituent elements of the RF module, is installed.
FIGS. 19a and 19b are exploded perspective views illustrating a state where the amplification
element module, one of the constituent elements of the RF module, installed.
FIG. 20 is a perspective view illustrating another implementation example of the amplification
element module, one of the constituent elements of the RF module.
FIG. 21 is an exploded perspective view illustrating a state where the radiation element
module, the RF filter, and the amplification element module that are among constituent
elements in FIG. 20 are installed.
FIGS. 22a and 22b are exploded perspective views illustrating a state where the amplification
element module, one of the constituent elements in FIG. 20 is installed.
FIG. 23a and 23b are exploded perspective views each illustrating the radiation element
module.
FIG. 24 is an exploded perspective view illustrating a state where a radome of a radiation
director, one of constituent elements of the radiation element module, is installed.
FIG. 25 is a perspective view and a partially enlarged perspective view that illustrate
a shape of a reflector grill pin, one of the constituent elements of the RF module
in FIG. 2, and an arranged state of the reflector grill pins, respectively.
FIG. 26 is a partially enlarged perspective view illustrating an arrangement relationship
among reflector grill pins.
FIG. 27a is a cross-sectional view and a partially enlarged cross-sectional view that
are taken along line A-A on the RF module, as a single unit, in FIG. 15. FIG. 27b
is a cross-sectional view and a partially enlarged cross-sectional view that are taken
along line B-B on the RF module, as a single unit, in FIG. 15.
<Description of the Reference Numerals in the Drawings>
[0028]
100: Antenna Apparatus 110: Rear Housing
111: Rear Heat Dissipation Pin 115: Installation Space
120, 120a~120d: Ventilation Panel 130: Handle
140: Front Housing 141: Front Heat Dissipation Pin
143: Socket Through-hole 144: Foreign-material Introduction Prevention Ring
146: Module Assembling Screw 147: Surface Seating Portion
149: Ring Installation Groove 150: RFIC Sub-board
153: RFICs(RFIC Elements) 155: Intermediary Female Socket
157: Separation Support 160: Thermal Separation Plate
161: Intermediary Male Socket 170: Main Board
171: Frontmost Female Socket 173: Digital Element
180: PSU Sub-board 183: PSU
185: Bus Bar 185': Bus Bar Fastening Screw
190: Surge Sub-board 195: Bus Bar
195': Bus Bar Fastening Screw 200: RF Module
210: Radiation Element Module 211: Radiation-element Printed Circuit Board
212: Antenna Patch Circuit Unit 213: Electricity Supply Line
214a: Input Screw Hole 214b: Output Screw Hole
217: Radiation Director 217a: Multiplicity of Combination Holes
220: RF Filter 221: Filter Body
222: Cavity 223: Resonance Bar
224: Reflector Grill Pin 226: Through-pin Terminal
227: Filter Tuning Cover 228: Filter Outer Panel
229: Through-pin Terminal 230: Amplification Element Module
231: Amplification Unit Body 232: Amplification-unit Heat Sink Pin
233: Board Seating Space 234: Assembling Panel
235: Amplification Unit Board 235a: Male Socket
236: Amplification Unit Cover 238: Joint Flange
239: Screw Boss 240: Radome Cover
241: Hook Combination Portion 247a: Multiplicity of Combination Protrusions
250: Module Assembling Screw 300: Antenna RF Module Assembly
400: Outside Mounting Member
[Description of Embodiments]
[0029] An antenna radio frequency (RF) module, and an antenna apparatus including the antenna
RF modules according to embodiments, respectively, of the present disclosure, will
be described in detail below with reference to the accompanying drawings.
[0030] It should be noted that, in assigning a reference numeral to a constituent element
that is illustrated in the drawings, the same constituent element, although illustrated
in different drawings, is designated by the same reference numeral, if possible, throughout
the drawings. In addition, specific descriptions of a well-known configuration and
function associated with the first, second, and third embodiments of the present disclosure
will be omitted when determined as making the embodiments of the present disclosure
difficult to understand.
[0031] The ordinal numbers first, second, and so forth, the letters A, B, and so forth,
the parenthesized letters (a), (b), and so forth may be used to describe constituent
elements of the first, second, third embodiments of the present disclosure. These
ordinal numbers, letters, parenthesized letters are only used to distinguish among
constituent elements and do not impose any limitation to the natures of constituent
elements to which these ordinal numbers, letters, or parenthesized letters, respectively,
are assigned, the turn of each of the constituent elements to operate or function,
the order of the constituent elements, and the like. Unless otherwise defined, all
terms including technical or scientific terms, which are used in the present specification,
have the same meanings as are normally understood by a person of ordinary skill in
the art to which the present disclosure pertains. A term as defined in a dictionary
in general use should be construed as having the same meaning as interpreted in context
in the relevant technology, and, unless otherwise explicitly defined in the present
specification, should not be construed as having an ideal meaning or an excessively-formal
meaning.
[0032] According to the present disclosure, a radome, as a single unit, that is combined
on a per-RF module basis is provided instead of a radome, as a single unit, of an
antenna apparatus in the related art, and RF-related components that are mounted on
a main board inside an antenna housing in the related art are configured as an RF
module, together with an RF filter, or are configured in a manner that is separated
from the main board. The technical idea of the present disclosure is that heat generated
from various heat generating elements of the antenna apparatus is spatially separated
and distributed. An antenna RF module 200, and an antenna apparatus 100 including
the antenna RF modules according to the embodiments, respectively, of the present
disclosure will be described below with reference to the drawings.
[0033] FIG. 2 is a perspective view illustrating the antenna apparatus 100 according to
the third embodiment of the present disclosure. FIG. 3 is an exploded perspective
view illustrating the antenna apparatus 100 in FIG. 2. FIG. 4 is an exploded perspective
view that is referred to for description of states where the antenna RF module assembly
300 is attached to or detached from a front housing 140. FIG. 5 is an exploded perspective
view illustrating a state where the front housing 140 and a rear housing 110 are separated
from each other. FIG. 6 is an exploded perspective view illustrating a state where
the front housing 140 is assembled to the rear housing 110. FIG. 7 is a perspective
view illustrating a removed state of a ventilation panel, one of constituent elements
in FIG. 2. FIG. 8a and 8b are exploded perspective views each illustrating relationships
in which various boards are assembled to the rear housing 110. FIG. 9 is an exploded
perspective view illustrating a combined state of a surge sub-board 190, one of the
constituent elements in FIG. 2. FIG. 10 is an exploded perspective view illustrating
a position for combining an RFIC sub-board 150, one of the constituent elements in
FIG. 2. FIG. 11 is an exploded perspective view illustrating a state where the RFIC
sub-board in FIG. 10 is combined with a rear surface of the front housing 140.
[0034] The antenna apparatus 100 according to the third embodiment, as illustrated in FIGS.
2 to 7, includes the rear housing 110 that forms a rear exterior appearance of the
antenna apparatus 100 and the front housing 140 that forms one portion of a front
exterior appearance of the antenna apparatus 100.
[0035] In addition, the antenna apparatus 100 further includes a main board 170 that is
adhesively installed in an installation space 115 in the rear housing 110, a power
supply unit (PSU) sub-board 180 that is arranged on top of the main board 170, the
surge sub-board 190 that is arranged to be spaced more backward than the main board
170, the RFIC sub-board 150 that is adhesively arranged on the rear surface of the
front housing 140, and the antenna RF modules (hereinafter referred to as "RF modules")
200 that are arranged in a stacked manner on a front surface of the front housing
140.
[0036] The rear housing 110 and the front housing 140 are combined with the RF module 200.
Thus, the rear housing 110 and the front housing 140 form the exterior appearance
of the entire antenna apparatus 100 and may serve as an intermediary for combination
with a support pole that, although not illustrated, is provided to install the antenna
apparatus 100. However, as long as there is no restriction on space for installation
of the antenna apparatus 100, an assembly of the rear housing 110 and the front housing
140 is not necessarily combined with the support pole. It is also possible that the
assembly of the rear housing 110 and the rear housing 140 is directly installed in
a wall-mounted manner on or fixed to a vertical structure, such as an inside or outside
wall of a building. Particularly, it is significantly meaningful that the antenna
apparatus 100 according to the third embodiment of the present disclosure is designed
for slimness in such a manner as to have a minimized thickness in the forward-backward
direction in order to be easily installed in a wall-mounted manner. The installation
of the antenna apparatus 100 in a wall-mounted manner will be described in detail
below.
[0037] The rear housing 110 and the front housing 140 are made of a metal material having
an excellent heat transfer property in such a manner as to advantageously dissipate
heat through an overall area thereof by heat transfer. Moreover, the rear housing
110 and the front housing 140 are formed in the form of a rectangular parallelepiped-shaped
casing with a small thickness substantially in the forward-backward direction. Particularly,
the rear housing 110 is formed to be open at the front surface thereof. Thus, the
rear housing 110 has the predetermined installation space 115. Thus, the rear housing
110 serves as an intermediary for installation of the main board 110 on which a digital
element (for example, a field programmable gate array (FPGA ) 173 is mounted, the
PSU sub-board 180 on which PSU elements are mounted, and the surge sub-board 190 on
which surge elements are mounted.
[0038] Although not illustrated in the drawings, the rear housing 110 may be formed in such
a manner that an internal surface thereof shape-fits on an externally protruding portion
of the digital element (the FPGA 173 or the like) that is mounted on a rear surface
of the main board 170, a PSU 183, and the like that are mounted in a rear surface
of the PUS sub-board 180 and on externally protruding portions of the surge elements
that are mounted on a rear surface of the surge sub-board 190. The reason for this
is to maximally increase an area, for heat transfer, of the inside surface of the
rear housing 110 that is brought into contact with respective rear surfaces of the
main board 170, the PSU sub-board 180, and the surge sub-board 190 and thus to maximize
performance in heat dissipating.
[0039] A handle 130 may be further installed on both the left and right sides of the rear
housing 110. An operator on the spot uses the handle 130 when transporting the antenna
apparatus 100 according to the third embodiment of the present disclosure or in order
to facilitate manual mounting of the antenna apparatus 100 on the support pole (not
illustrated) or the inside or outside wall of the building.
[0040] Moreover, various outside mounting members 400 for connecting a cable to an apparatus
of a base station (not illustrated) and for regulating an internal component may be
assembled to the outside of a lower end portion of the antenna housing 110 and 140
by passing therethrough. The outside mounting member 400 is provided in the form of
at least one optical-cable connection terminal (socket). Connection terminals for
coaxial cables (not illustrated) may be connected to the connection terminals, respectively.
[0041] With reference to FIG. 2, a multiplicity of rear heat dissipation pins 111 may be
integrally formed with a rear surface of the rear housing 110 in such manner as to
have a predetermined pattern. In this case, heat generated from respective heat generating
elements of the main board 170, the PSU sub-board 180, and the surge sub-board 190
that are installed in the installation space 115 in the rear housing 110 may be directly
dissipated toward the rear direction through the multiplicity of rear heat dissipation
pins 111.
[0042] The multiplicity of rear heat dissipation pins 111, as illustrated in FIG. 4(b),
are arranged in such a manner that the rear heat dissipation pins 111 on the left
side of the rear surface of the rear housing 110 are inclined upward toward the right
side thereof and that the rear heat dissipation pins 111 on the right side of the
rear surface of the rear housing 110 are inclined upward toward the left side thereof.
The multiplicity of rear heat dissipation pins 111 may be designed in such a manner
that the heat dissipated toward the rear of the rear housing 110 dispersedly forms
ascending air currents toward the leftward and rightward direction, respectively,
of the rear housing 110 and thus is dispersed more quickly. However, the multiplicity
of rear heat dissipation pins 111 are not necessarily limited to formation in this
arrangement. For example, although not illustrated in the drawings, in a case where
a forced-draft fan module (not illustrated) is further provided to the side of the
rear surface of the rear housing 110 in order to facilitate a flow of outside air,
a configuration may be employed in which the multiplicity of rear heat dissipation
pins 111 are parallelly formed on the left and right sides of the rear surface thereof,
with the forced-draft fan module arranged on the center of the rear surface thereof,
in such a manner that the heat dissipated by the forced-draft fan module is discharged
more quickly.
[0043] In addition, although not illustrated, a mounting unit (not illustrated) with which
a clamping device (not illustrated) for combing the antenna apparatus 100 with the
support pole (not illustrated) is combined may be integrally formed with some of the
multiplicity of rear heat dissipation pins 111. In this case, the clamping device
may be configured to adjust the directivity of the antenna apparatus 100 according
to the third embodiment of the present disclosure, which is installed on an upper
end portion of the clamping device, by rotating the antenna apparatus 100 in a leftward-rightward
direction or by tilting the antenna apparatus 100 in an upward-downward direction.
[0044] However, the clamping device for tilting or rotating the antenna apparatus 100 is
not necessarily combined with the mounting unit. For example, in a case where the
antenna apparatus 100 is installed on the inside or outside wall of the building in
a wall-mounted manner, it is also possible that a clamp panel in the form of a latch-shaped
plate that is easy to combine in a wall-mounted manner is combined with the mounting
unit.
[0045] As a first implementation example, the antenna apparatus 100 , as illustrated in
FIGS. 1 to 7, may further include the surge sub-board 190 that is adhesively arranged
on the front surface of the rear housing 110 in the installation space 115 in the
rear housing 110 in such a manner as to be spaced apart from the back of the main
board 170, and the PSU sub-board 180 that is arranged on top of the main board 170
in the installation space 115 in the rear housing 110 such a manner as to have a front
surface that is matched with a front surface of the main board 170.
[0046] In this case, the surge sub-board 190 may be arranged in such a manner that a front
end portion thereof is supported on a rear surface of the main board 170 and that,
with a multiplicity of separation supports 197 supported on a front surface of the
surge sub-board 190, a rear end portion thereof is arranged to be spaced a predetermined
distance away from the back of the main board 170.
[0047] As illustrated in FIGS. 8a and 8b, the surge sub-board 190 and the PSU sub-board
180 may be electrically connected to each other with at least one of bus bars 195
and 185 in between. The main board 170 and the PSU sub-board 180 may be electrically
connected to each other with at least one of bus bars 195 and 185 in between.
[0048] More specifically, the surge sub-board 190 is arranged at a relatively high height
in the installation space 115 in the rear housing 110, with the surge sub-board 190
and the PSU sub-board 180 being positioned with the main board 170 in between. Conversely,
the PSU sub-board 180 is arranged at a relatively low height in the installation space
115 in the rear housing 110, with the PSU sub-board 180 and the surge sub-board 190
being positioned with the main board 170 in between. Accordingly, the surge sub-board
190 and the PSU sub-board 180 may be electrically connected to each other with the
long-sized bus bar 195. The long-sized bus bar 195 may be stably fixed because each
of the end portions and middle portion thereof are fastened by a multiplicity of bus
bar fastening screws 195'.
[0049] In addition, the PSU sub-board 180 may be arranged in a manner that is brought into
direct contact with an upper end of the main board 170 and thus may be electrically
connected to the main board 170 with the short-sized bus bar 185. The short-sized
bus bar 185 may be stably fixed because each of the end portions thereof is fastened
by a multiplicity of bus bar fastening screws 185'.
[0050] As a second implementation example, the antenna apparatus 100 according to the third
embodiment of the present disclosure, as illustrated in FIGS. 10 and 11, may further
include the RFIC sub-board 150 that is arranged to be spaced away from the front of
the main board 170 in the installation space 115 in the rear housing 110, but adhesively
arranged on the rear surface of the front housing 140.
[0051] RFICs 153 that correspond to the FPGA 173, respectively, that are mounted on the
main board 170 may be arranged on the RFIC sub-board 150 in a manner that is mounted
thereon. The RFIC sub-board 150 may be arranged in such a manner that the RFICs 153
that are mounted, together with the FPGAs 173 described above, on a front surface
or rear surface of a main board 170 in the related art are separated from the main
board 170, but, for heat transfer, are brought into surface contact with the rear
surface of the front housing 140 that is substantially an essential constituent element
for dissipation of heat toward a front direction.
[0052] In this case, the RFIC sub-board 150, as illustrated in FIG. 10, may be arranged
in such a manner that a front end portion thereof is supported on the rear surface
of the front housing 140 and that, with the multiplicity of separation supports 157
supported on the front surface of the main board 170, a rear end portion thereof is
spaced a predetermined distance away from the front of the main board 170. In this
manner, thermal separation between the RFIC sub-board 150 and the main board 170 may
be achieved by arranging the RFIC sub-board 150 in such a manner as to be spaced away
from the front of the main board 170.
[0053] As illustrated in FIG. 11, electrical connection to the main board 170 may be possible
with passing-through of a thermal separation plate 160 provided on the back of the
RFIC sub-board 150 for physical thermal separation from the main board 170.
[0054] More specifically, as illustrated in FIG. 10, a multiplicity of intermediary female
sockets 155 that are combined, in a socket-pin coupling manner, with a multiplicity
of male sockets 235a, respectively, on an amplification unit board 235, one of constituent
elements of the RF module 200, may be formed on a front surface of the RFIC sub-board
150. Moreover, an intermediary male socket 161 that is combined, in a socket-pin coupling
manner, with a frontmost female socket 171 formed on the front surface of the main
board 170 may be formed on a rear surface of the RFIC sub-board 150. In this case,
the intermediary male socket 161 may be formed on the rear surface of the RFIC sub-board
150, but may pass through the thermal separation plate 160 and thus be exposed at
a rear surface of the thermal separation plate 160, in such a manner as to be combinable,
in a socket-pin coupling manner, with the front female socket 171 of the main board
170.
[0055] The intermediary female socket 155 formed in the RFIC sub-board 150 may be exposed
toward the front direction through a socket through-hole 143 (refer to FIG. 12 that
follows) formed in the front housing 140. In this manner, the male socket 235a on
the amplification unit board 235 may be combined, in a socket-pin coupling manner,
with the intermediary female socket 155 exposed toward the front direction.
[0056] It is desired that the thermal separation plate 160 is made of a thermal insulating
material in such a manner as to prevent heat generated from the RFIC sub-board 150
from dissipating toward the installation space 115 in the rear housing 110 that is
a rear space that is positioned at a relatively remote distance in the rear direction
and to immediately guide dissipating of the heat toward the front direction through
the front housing 140.
[0057] The front housing 140 serves to separate the main board 170, the PSU sub-board 180,
the surge sub-board 190, and the RF module 200 in the front direction that are seated
in the installation space 115 in the rear housing 110 by being separated therein.
In addition, the front housing 140 may be provided in such a manner as to separate
the installation space 115 positioned to the side of the rear housing 110 and the
other space from each other. Thus, the front housing 140 may perform thermal blocking
and thermal separation functions, in such a manner that heat generated in the installation
space 115 positioned toward the direction of the rear housing 110 does not have an
influence toward the RF module 200.
[0058] It is desired that the "thermal blocking" here is understood as meaning that heat
generated from the RF module 200 positioned in outside air in front (or a space in
front) that is defined as a space in front of the front surface of the front housing
140 is blocked from being transferred toward a space in the rear surface of the front
housing 140 (that is, toward the installation space 115 in the rear housing 110).
Moreover, it is desired that, for a separate thermal configuration, the "thermal separation"
here is understood as meaning that some of a multiplicity of elements from which heat
is generated during operation and which are originally mounted in a concentrated but
dispersed manner on the front and rear surfaces of the main board 170 adhesively installed
in the installation space 115 in the rear housing 110 are configured to be separately
arranged in such a manner as to possibly dissipate the heat not only in the rear direction,
but also in the front direction.
[0059] A multiplicity of front heat dissipation pins 141 may be integrally formed on the
front surface of the front housing 140. The front housing 140 and the multiplicity
of the front heat dissipation pins 141 are made of a metal material having an excellent
heat transfer property. Thus, the heat in the installation space 115 in the rear housing
110 or the heat generated from the RFICs 153 may be easily dissipated toward the front
direction in a manner that transfers heat, with the front housing 140 serving as an
intermediary for heat transfer.
[0060] As a third implementation example, the antenna apparatus 100 according to the third
embodiment of the present disclosure, as illustrated in FIG. 6, may further include
at least one of ventilation panels 120 (ventilation panels 120a to 120d). Front end
portions of the multiplicity of RF modules 200 are positioned in such a manner as
to be spaced further away, toward the front direction, from an edge of the front housing
140. At least one of the ventilation panels 120 (ventilation panels 120a to 120d)
is combined with an edge portion of the front housing 140, but may be combined in
a manner that surrounds lateral sides of a multiplicity of outermost RF modules 200
.
[0061] In the antenna apparatus 100, as a fourth implementation example, according to the
third embodiment of the present disclosure, as illustrated in FIG. 6, the first ventilation
panel 120a and the second ventilation panel 120b are combined with respective upper
and lower portions, respectively, of the uppermost and lowermost RF modules 200, among
a multiplicity of RF modules 200 that are combined with the front surface of the front
housing 140, in such a manner that the respective upper and lower portions thereof
are closed. Moreover, the third ventilation panel 120c and the fourth ventilation
panel 120d are combined with respective left and right portions, respectively, of
the leftmost and rightmost RF modules 200, among the multiplicity of RF modules 200
that are combined with the front surface of the front housing 140, in such a manner
that the respective upper and lower portions thereof are closed.
[0062] In this case, a ventilation hole (to which a reference number is not assigned) having
a predetermined size is wholly formed in at least one of the ventilation panels 120
(ventilation panels 120a to 120d). Accordingly, through the ventilation hole, outside
air in the external space may be introduced toward the front of the housing 140, or
the heat dissipated toward the front of the front housing 140 may be smoothly discharged
toward the external space. Thus, outside air ventilation can be enhanced. The enhancing
of the outside air ventilation can greatly improve the performance in dissipating
the heat toward the front of the front housing 140.
[0063] In addition, as described below, since the RF module 200 is exposed to the outside
air in front that is defined as a space in front of the front surface of the front
housing 140, at least one of the ventilation panels 120 is arranged in such a manner
as to close at least the lateral side of the RF module 200 exposed to the outside
in front, and thus may serve to block an outside foreign material from being introduced
toward the front of the front housing 140 and to block an non-credentialed person
who is unauthorized to access the antenna apparatus 100 from accessing the RF module
200.
[0064] In this case, as illustrated in FIG. 5, a multiplicity of fastening screws 125 are
sequentially fastened into ventilation panel fastening grooves 120', respectively,
formed on a rear end portion of at least one of the ventilation panels 120 and ventilation
panel fastening holes 140', respectively, formed to be spaced apart along an end portion
of an edge of the front housing 140. Thus, at least one of the ventilation panels
120 may be combined with the edge portion of the front housing 140.
[0065] Furthermore, as illustrated in FIG. 7, at least one of the ventilation panels 120
is provided in such a manner that a reflector grill pin 224 integrally formed on an
RF filter 220, one of the constituent elements of the RF module 200, that is described
below, and the front housing 140 are arranged to be spaced away from each other. Therefore,
a front end portion of the ventilation panel 120 may be combined with the reflector
grill pin 224 by being brought into electric contact therewith, in such a manner that
the reflector grill pin 224 serves to smoothly perform a grounding (GND) function,
one of functions of the reflector grill pin 224.
[0066] FIG. 12 is an exploded perspective view illustrating a state where the RF module
200, one of the constituent elements in FIG. 2, is installed in the front housing
140. FIG. 13 is an enlarged perspective view illustrating a portion of the front surface
of the front housing 140 that the RF module 200 is attached to and detached from,
and a portion of a rear surface of the RF module 200. FIG. 14 is a cut-away perspective
view illustrating a state where the RF module 200 is combined with the main board
170. FIG. 15 is a perspective view illustrating the RF module 200, as a single unit,
one of the constituent elements in FIG. 2. FIG. 16 is an exploded perspective view
illustrating the RF module 200, as a single unit in FIG. 15. FIGS. 17a to 17d are
exploded perspective views illustrating a state where a front module, one of the constituent
elements of the RF module 200, is installed and a state where a rear module, one of
the constituent elements of the RF module 200, is installed. FIG. 18 is an exploded
perspective view illustrating a state where a radome, one of the constituent elements
of the RF module 200 is installed. FIGS. 19a and 19b are exploded perspective views
each illustrating a state where an amplification element module 230, one of the constituent
elements of the RF module, is installed.
[0067] As a first implementation example, with reference to FIGS. 12 to 19b, the RF module
200 according to the first embodiment of the present disclosure includes the RF filter
220 arranged on a front surface of the main board 170, the radiation element module
210 arranged on a front surface of the RF filter 220, and at least one reflector grill
pin 224 which is arranged between the RF filter 220 and the radiation element module
210 and grounds (GND) the radiation element module 210 and through which outside air
is introduced from in front of the RF filter 220 to in back of the RF filter 220 or
is discharged from in back of the RF filter 220 to in front of the RF filter 220.
[0068] The RF module 200 is an assembly of analog RF components. For example, an amplification
element module 230 is an RF component that includes the amplification unit board 235
on which an analog amplification element amplifying an RF signal is mounted, the RF
filter 220 is an RF component for frequency-filtering the input RF signal to obtain
an RF signal in a desired frequency band, and the radiation element module 210 is
an RF component that serves to receive and transmit the RF signal.
[0069] As a second implementation example, the RF module 200 according to the first embodiment
of the present disclosure may be defined as follows.
[0070] That is, the RF module 200 according to the first embodiment of the present disclosure
serves as an RF module 200 that includes analog RF components. The analog RF components
include the RF filter 220, the radiation element module 210 that is arranged in front
of the RF filter 220, and an analog amplification element (not illustrated) on the
amplification element module 230 that is arranged in rear of the RF filter 220.
[0071] The amplification element module 230 here may be electrically connected to the main
board 170 inside the rear housing 110 with the amplification unit board 235 described
below in between. Furthermore, as described above, for this electrical connection,
the RFIC sub-board 150 may be interposed between the amplification unit board 235
and the main board 170.
[0072] The antenna RF module assembly 300 according to the second embodiment of the present
disclosure that will be described below may be configured with a plurality of RF modules
200 that are implemented as the various implementation examples described above. Therefore,
manufacturers that manufacture RF components are capable of manufacturing, distributing,
and selling RF components for each RF module 200 or each antenna RF module assembly
300, in a state where a multiplicity of RF modules 200 are temporarily pre-assembled
to the front housing 140 or are available on a per-module basis for pre-assembling,
and thus have the advantage of being capable of establishing a new market environment.
[0073] Furthermore, at least one reflector grill pin 224 may be integrally formed on the
RF filter 220. That is, the RF filter 220 may be manufactured of a molding material
having a metal component, using a die-casting molding technique. In this case, the
reflector grill pin 224 is also made of a metal material in terms of its function.
In this respect, the RF filter 220 and the reflector grill pin 224 are integrally
manufactured of the same molding material having a metal component, using the same
die-casting molding technique as when the RF filter 220 is manufactured. However,
the RF filter 220 and the reflector grill pin 224 are not necessarily limited to the
metal material. It is also possible that the RF filter 220 and the reflector grill
pin 224 are formed of a dielectric material, but that a film of a conductive material
is formed on outer surfaces of the RF filter 220 and the reflector grill pin 224.
[0074] As a third implementation example, the RF module 200 according to the first embodiment
of the present disclosure may further include the amplification element module 230
which is arranged between the main board 170 and the RF filter 220 and on which at
least one analog amplification element (to which a reference numeral is not assigned)
is mounted.
[0075] In this manner, as illustrated in FIGS. 12 to 14, the RF module 200 in which the
radiation element module 210 is combined with the front of the RF filter 220 and in
which the amplification element module 230 is combined with the back of the RF filter
220 may be combined, on a per-module basis, with the main board 170 in a socket-pin
coupling manner with the front housing 140 in between.
[0076] To that end, as illustrated in FIG. 12 to 14, the socket through-hole 143 may be
formed in the front housing 140 in a manner that passes therethrough in the forward-backward
direction, a surface seating portion 147 may be formed in the vicinity of the socket
through-hole 143. A ring installation groove 149 in which a foreign-material introduction
prevention ring 144 described below is interposed by being inserted thereinto may
be formed in the surface seating portion 147. Furthermore, module assembling screws
146 for installing the RF module 200 may be provided inside the socket through-hole
143 in a manner that they are spaced apart in the upward-downward direction. The module
assembling screw 146 may be assembled into a rear surface of the front housing 140
by passing therethrough toward the front direction and then may be fastened to a rear
surface of the RF module 200.
[0077] As illustrated in FIG. 13(b), a joint flange 238 may be formed on the rear surface
of the RF module 200. The male socket 235a on the amplification unit board 235 described
below passes through the joint flange 238, then is exposed toward the rear direction
and is joined to the surface seating portion 147 on the front housing 140. A screw
boss 239 to which the module assembling screw 146 is fixed by being fastened thereto
may be formed on the joint flange 238.
[0078] At this point, the RF module 200 is provided in such a manner as to be exposed to
the outside air in front that is defined as the space in front of the front surface
of the front housing 140 . Therefore, there is a need to prevent foreign materials,
including rainwater and dust, from being introduced into the front housing 140. In
the RF module 200 according to the first embodiment, as illustrated in FIG. 14, the
joint flange 238 on the RF module 200 is brought into close contact with the surface
seating portion 147 on the front housing 140, and then the module assembling screw
146 is tightened to keep the joint flange 238 and the surface seating portion 147
in close contact with each other. Thus, the foreign-material introduction prevention
ring 144 interposed in the ring installation groove 149 can completely close the gap
between the joint flange 238 on the RF module 200 and the surface seating portion
on the front housing 140.
[0079] The amplification element module 230 serves to receive a signal from the main board
170 and a signal from the RF filter 220, to amplify these signals by a predetermined
value, and to output the resulting signals.
[0080] The amplification element module 230 may include an amplification unit body 231 having
a board seating space 233 that is open at one side or the other side in a width direction,
the amplification unit board 235, and an amplification unit cover 236 that is provided
in such a manner as to cover the amplification unit board 235. The amplification unit
board 235 is seated inside the amplification unit body 231. A front end portion of
an edge of the amplification unit board 235 is connected to the RF filter 220 for
signal transmission, and a rear end portion of the edge thereof is connected to the
main board 170 (connected to the RFIC sub-board 150 in a case where, as an implementation
example, the RFIC sub-board 150 is provided separately from the main board 170) for
signal transmission.
[0081] The amplification element module 230 with this configuration, as illustrated in FIGS.
17a to 17d, is simply electrically connected to the RF filter 220 described below
in a feed through-pin coupling manner. Moreover, the amplification element module
230 is physically combined with the RF filter 220 by a module assembling screw 250
that is fastened into a screw assembling groove 234a in an assembling panel 234 formed
on the amplification unit body 231.
[0082] The amplification unit board 235 may be combined with the RF filter 220 with a through-pin
terminal 229 in between, in a feed through-pin coupling manner, and may be combined
with the main board 170 (more desirably, the RFIC board sub-board 150) in a socket-pin
coupling manner.
[0083] In addition, at least one male socket 235a for combination with the main board 170
(or the RFIC sub-board 150 in a case where, as an implementation example, the RFIC
sub-board 150 is provided separately from the main board 170) in a socket pin coupling
manner may be provided on the amplification unit board 235.
[0084] The amplification unit board 235 may be adhesively combined with an inner surface
of the amplification unit body 231. A multiplicity of amplification-unit heat sink
pins 232 may be integrally formed on an outer surface of the amplification unit body
231. The multiplicity of amplification-unit heat sink pins 232 dissipate heat generated
from the analog amplification elements on the amplification unit board 235 toward
the external space. At least one of a PA element and an LNA element may be mounted,
as an analog amplification element, on the amplification unit board 235.
[0085] In the relates art, the analog amplification elements (the PA element and the LNA
element) that are primary heat generating elements are mounted on the main board 170
provided in the installation space 115 between the rear housing 110 and the front
housing 140. In the RF module 200 according to the first embodiment of the present
disclosure, the analog amplification elements are manufactured on a per-module basis
in the same manner as the amplification element module 230. Moreover, a design change
is made in such a manner that the analog amplification elements are exposed to the
outside air in front that is defined as the space in front of the front surface of
the front housing 140 that is a space where heat is easily dissipated. Thus, the advantage
of distributing thermal overload in the installation space 115 and concurrently improving
the performance in heat dissipation can be achieved.
[0086] At this point, the amplification unit board 235, as illustrated in FIGS. 19a and
19b, is installed in the board seating space 233 in such a manner that one surface
of the amplification unit board 235 is brought into close contact with an inner surface
of the board seating space 233. Two PAs 251 and 252, which are power amplifiers among
the analog amplification elements, are mounted on the other surface of the amplification
unit board 235, thereby possibly constituting a 2T2R antenna.
[0087] Heat that is generated from the two PAs 251 and 252 may be easily dissipated to the
outside through the multiplicity of amplification-unit heat sink pins 232 that are
integrally formed with the amplification unit body 231 in such a manner as to be adjacent
to an inner surface of the board seating space 233.
[0088] FIG. 20 is a perspective view illustrating another implementation example of the
amplification element module 230, one of the constituent elements of the RF module
200. FIG. 21 is an exploded perspective view illustrating a state where the radiation
element module 210, the RF filter 220, and the amplification element module 230 that
are among constituent elements in FIG. 20 are installed. FIGS. 22a and 22b are exploded
perspective views illustrating a state where the amplification element module 230,
one of the constituent elements in FIG. 20 is installed.
[0089] One implementation example of the amplification element module 230 that is described
with reference to FIGS. 15 to 19b is designed to have a heat dissipation structure.
In this heat dissipation structure, the amplification unit board 235 is seated on
the board seating space 233 in one side (or the other side), open in the width direction,
of the amplification unit body 231. Furthermore, the analog amplification elements
(the PA element and the LNA elements are mounted only on the opposite surface (the
other surface) of both surfaces of the amplification unit board 235, the opposite
surface facing one side, which is open, of the amplification unit body 231. Heat generated
from the analog amplification elements is dissipated through the multiplicity of amplification-unit
heat sink pins 232 that are integrally formed with the amplification unit body 231
in such a manner as to perform a heat dissipation function.
[0090] However, the two PAs 251 and 252 are not necessarily installed in a concentrated
manner on the other surface of the amplification unit board 235. As illustrated in
FIGS. 20 to 22b, the two PAs 251 and 252 may be arranged to be mounted on both surfaces,
respectively, of the amplification unit board 235. That is, as illustrated in FIG.
22a, one PA 251 of the two PAs 251 and 252 that realize the 2T2R antenna in one RF
module 200a may be arranged to be mounted on the other surface (that is, a surface
facing an amplification unit cover 236a described below) of the amplification unit
board 235 in such a manner as to realize a 1T1R antenna. In addition, as illustrated
in FIG. 22b, the other one 252 of the two PAs 251 and 252 that realize the 2T2R antenna
in one RF module 200a may be arranged to be mounted on one surface (that is, a surface
facing the inner surface of the board seating space 233) of the amplification unit
board 235 in such a manner as to realize the 1T1R antenna. As a result, each surface
of the amplification unit board 235 results in realizing the 1T1R antenna, and the
2T2R antenna is realized in one RF module 200a.
[0091] Furthermore, as illustrated in FIGS. 22a and 22b, a multiplicity of amplification-unit-cover
heat sink pins 236b that correspond to the multiplicity of amplification-unit heat
sink pins 232, respectively, that are integrally formed on the outer surface of the
amplification unit body 231 described above may be integrally formed on an outer surface
of an amplification unit cover 236a provided in such a manner as to cover the board
seating space 233 in the amplification unit body 231.
[0092] In another implementation example of the amplification element module 230 that is
configured as described above, the two PAs 251 and 252 that realize the 2T2R antenna
inside one RF module 200a are distributively arranged on both surfaces, respectively,
of the amplification unit board 235 in such a manner as to realize the 1T1R antenna.
Heat generated from one surface of the amplification unit board 235 and heat generated
from the other surface thereof are distributively dissipated through both the amplification
unit body 231 and the amplification unit cover 236a, respectively. Thus, the advantage
of further maximizing the performance in heat dissipation is provided.
[0093] The RF filter 220, as illustrated in FIG. 6, includes a filter body 221 in which
a multiplicity of cavities 222 are formed in such a manner as to be open at front
sides thereof, a resonance bar 223 arranged inside each of the multiplicity of cavities
222, and a filter outer panel 228 arranged in such a manner as to close a front surface
of the filter body 221. A filter tuning cover 227 may be combined with the filter
outer panel 228 and the filter body 221 in a state of being positioned therebetween.
[0094] At this point, the radiation element module 210 may be combined with the filter body
221 by being seated therein in such a manner as to cover a front surface of the filter
outer panel 228.
[0095] The RF module 200 may further include a radome cover 240 that is combined with a
front end portion of the RF filter 220 and protects the radiation element module 210
from the outside.
[0096] A multiplicity of hook combination portions 241 may be formed on a portion of an
edge of the radome cover 240. The radome cover 240 may be hook-combined with the filter
body 221 by the multiplicity of hook combination portions 241 being combined with
a stepped portion of the filter body 221.
[0097] The radome cover 240 may be formed of the same material as a radome panel, as a single
unit, in the related art, and may be combined with each RF module 200, as a single
unit. That is, the radome cover 240 may be formed of a resin material that easily
transmits a radio wave. Because an amount of heat generated when the radiation element
module 210 is driven is negligible, the radome cover 240 may be formed of a thermal
insulating material regardless of heat dissipation.
[0098] The radome cover 240 is combined with the filter body 221 while blocking the radiation
element module 210 from being viewed from the outside. Thus, the radome cover 240
may serve to protect the radiation element module 210 from the external environment
(for example, a foreign material or the like). The RF module 200 is installed in such
a manner as to be exposed to the outside air in front that is defined as the space
in front of the front surface of the front housing 140. For this reason, although
not illustrated in the drawings, particularly, it is desired that the radome cover
240 has a sealing structure that completely blocks a foreign material, such as rainwater,
from being introduced into the filter body 221 in which the radiation element module
210 is provided.
[0099] Furthermore, the RF filter 220 and the radiation element module 210, as illustrated
in FIG. 18, may be electrically connected to each other with a through-pin terminal
226 in between, in a feed through-pin coupling manner.
[0100] The RF module 200 according to the first embodiment of the present disclosure that
has various forms, as the various implementation examples described above, will be
descried in more detail below with reference to the accompanying drawings.
[0101] The RF module 200, as illustrated in FIGS. 10 to 14, may be arranged in a stacked
manner on the front surface of the main board 170 with the front housing 140 in between.
[0102] In the antenna apparatus 100 according to the third embodiment of the present disclosure,
a plurality of RF modules 200 are provided and thus constitute the antenna RF module
assembly 300.
[0103] In this case, a configuration is employed in which a total of 32 RF modules 200,
as illustrated in FIGS. 10 and 12, are arranged adjacent to each other in four rows
in the leftward-rightward direction and in eight columns in the upward-downward direction.
However, the RF modules 200 are not necessarily limited to this arrangement. Of course,
it is to be naturally expected that the positions of the RF modules 200 in the arrangement
and the number of the RF modules 200 may be variously changed during the design phase.
[0104] In addition, the RF filter 220 according to the first embodiment of the present disclosure
is described, taking as an example a cavity filter in which a predetermined cavity
222 is formed in one side thereof and which is configured to include a dielectric
resonator (DR) or a metal resonance bar 223 in the predetermined cavity 222. However,
the RF filter 220 is not limited to this cavity filter, and various filters, such
as a dielectric filter, may be used as the RF filter 220.
[0105] Furthermore, a multiplicity of radiation element modules 210 are correspondingly
combined with a multiplicity of RF filters 220, respectively. Each of the multiplicity
of radiation element modules 210 operates as a 2T2R dual antenna. Therefore, the antenna
apparatus 100 according to the third embodiment of the present disclosure adopts,
for example, a model that operates as a 64T64R antenna, but is not limited to this
model. For example, in a case where an area where radiation elements are arranged
can increase by two times, it is also possible that each of the radiation element
modules 210 is provided in such a manner as to operate as a 1T1R antenna. In a case
where it is assumed that the performance in heat dissipation can be further improved,
it is also possible that each of the radiation element modules 210 is provided in
such a manner as to operate as a 4T4R antenna.
[0106] Usually, in order to implement beamforming, the multiplicity of radiation element
modules 210 are necessary as an array antenna. The multiplicity of radiation element
modules 210 may generate a narrow directional beam and may increase concentration
of radio wave toward a designated direction. In recent years, dipole antennas or patch
antennas have been utilized most frequently as the multiplicity of radiation element
modules 210. The multiplicity of radiation element modules 210 are designed in such
a manner that they are arranged to be spaced apart to minimize signal interference
with each other.
[0107] FIG. 23a and 23b are exploded perspective views each illustrating the radiation element
module. FIG. 24 is an exploded perspective view illustrating a state where a radome
of a radiation director, one of constituent elements of the radiation element module,
is installed.
[0108] In the RF module 200, as a fourth implementation example, according to the first
embodiment of the present disclosure, the radiation element module 210, as illustrated
in FIG. 23a and 23b, may include a radiation-element printed circuit board 211 that
is formed in a manner that extends over a long distance in the upward-downward direction,
and is arranged on each of the front surfaces of the multiplicity of RF filters, one
or more antenna patch circuit units 212 that are formed on a front surface of the
radiation-element printed circuit board 211 by being pattern-printed thereon, and
an electricity supply line 213 that connects the one or more antenna patch circuit
units 212 to each other for electricity supply.
[0109] As illustrated in FIG. 23a, the above-described antenna patch circuit unit 212, as
a dual polarization patch element that generates any one dual polarization of ±45
polarization and vertical/horizontal polarization that are orthogonal to each other
may be print-formed on the front surface of the radiation-element printed circuit
board 211. Three antenna patch circuit units 212 may be print-formed to be spaced
apart from each other in the upward-downward direction (the lengthwise direction).
The three antenna patch circuit units 212 may be connected by the electricity supply
line 213 to each other.
[0110] As illustrated in FIG. 23b, an input feeding line and an output feeding line that
branch off from the electricity supply line 213 may be formed on the radiation-element
printed circuit board 211. Electricity supply signal are applied and output through
the input feeding line and the output feeding line, respectively. An input through-hole
214a and an output through-hole 214b may be formed on front end portions, respectively,
of the input feeding line and the output feeding line in such a manner that they pass
therethrough, respectively. Through-pin terminals 226 arranged on the back of the
radiation-element printed circuit board 211 are inserted into the input through-hole
214a and the output through-hole 214b, respectively. The through-pin terminals 226
that constitute the RF filters 220 are inserted into the input through-hole 214a and
the output through-hole 214b, respectively, and thus may be electrically connected
to the electricity supply line 213.
[0111] A radiation director 217 is formed of a metal material having a heat transfer property
or conductivity and is electrically connected to the antenna patch circuit unit 212.
The radiation director 217 may perform a function of guiding a radiation beam toward
the front direction. In the RF module 200 according to the first embodiment of the
present disclosure, a total of 3 radiation directors 217 are arranged on the RF modules
200, respectively, in such a manner as to secure a maximum gain.
[0112] Furthermore, as illustrated in FIGS. 23a and 23b, a multiplicity of combination holes
217a in which a multiplicity of combination protrusions 247a, respectively, formed
on a rear surface of the radome cover 240 are inserted for combination may be formed
in the radiation director 217.
[0113] Therefore, since the multiplicity of combination protrusions 247a are inserted into
the multiplicity of combination holes 217a for combination, the radiation director
217, along with the radiation-element printed circuit board 211, may be module-combined
with the rear surface of the radome cover 240. Then, the radome cover 240 may be simply
assembled to the RF filter 220 by being combined therewith through the use of the
hook combination portion 241.
[0114] Typically, in an antenna apparatus, a reflector serves to ground an antenna circuit
and functions as a reflection surface. For example, a radiation beam that is emitted
in the rear direction by a dual polarization antenna is reflected toward a primary
radiation direction, and thus beam efficiency of the dual polarization antenna is
improved. According to the first embodiment of the present disclosure, the reflector
grill pin 224 and the outer panel 228 that are described below may perform a function
of the reflector.
[0115] FIG. 25 is a perspective view and a partially enlarged perspective view that illustrate
a shape of the reflector grill pin 224, one of the constituent elements of the RF
module 200 in FIG. 2, and an arranged state of the reflector grill pins 224. FIG.
26 is a partially enlarged perspective view illustrating an arrangement relationship
among the reflector grill pins 224.
[0116] The reflector grill pin 224, as illustrated in FIGS. 25 and 26, may be combined with
another reflector grill pin 224 of an adjacent RF filter 220 and may form a mesh topology
in which heat dissipation holes are formed in the shape of a grill. With this configuration,
heat dissipated from the front housing 140 in back of the multiplicity of RF filters
220 that are positioned at a relatively remote distance in the rear direction may
be easily discharged into the outside space through a multiplicity of heat dissipation
holes that are formed by a multiplicity of reflector grill pins 224. Accordingly,
the multiplicity of heat dissipation holes may serve as a heat discharging hole through
which heat generated between the front surface of the front housing 140 and the reflector
grill pin 224 is discharged to the outside. Accordingly, outside air in front may
be actively used to dissipate the heat generated in the antenna apparatus 100.
[0117] As illustrated in FIG. 25, the reflector grill pins 224-1 and 224-3 formed on the
RF filter 220 on one side and the reflector grill pins 224-2 and 224-4, adjacent to
the reflector grill pins 224-1 and 224-3, respectively, that are formed on the RF
filter 220 on the other side, although not in contact with each other, may be formed
to extend in such a manner as to overlap each other in an arbitrary vertical line,
so that each of the multiplicity of reflector grill pins 224-1 to 224-4 serves to
satisfactorily perform the grounding (GND) function and at the same time to maintain
a predetermined ventilation function. In this manner, the reflector grill pins 224-1
and 224-2 are arranged in such a manner as to overlap each other, thereby providing
the advantage of increasing a grounding sharing area toward a lateral surface of the
antenna.
[0118] Distances d1 and d2 between the reflector grill pins 224 may be suitably set by simulating
durability and heat dissipation characteristics of the reflector grill pin 224 during
the design phase. It is desired that the distances d1 and d2 are set considering a
distance by which the radiation elements included in the radiation element module
210 are arranged to be spaced. Furthermore, the distances d1 and d2 between the reflector
grill pins 224, as described below, may be set considering a wavelength of an operating
frequency during the design phase. For example, in order to reduce a propagation loss,
the distances d1 and d2 between the reflector grill pins 224 may be set to 1/20λ or
smaller of the operating frequency.
[0119] In addition, the distances d1 and d2 between the reflector grill pins 224 in one
RF module 200 is 1/10λ or smaller. When the multiplicity of RF modules 200 are assembled,
the reflector grill pins 224 intersect, thereby forming holes having a size of 1/20λ
or smaller.
[0120] For example, the distance d1 and d2 between the reflector grill pins 224 may be set
to have a size range of 1/10λ to 1/20λ of the operating frequency. In this case, the
size of 1/10λ has its meaning as an upper limit threshold value at which the reflector
grill pins 224 satisfactorily serve as a ground connection (GND) to the radiation
element module 210, and the size of 1/20λ has its meaning as a lower limit threshold
value at which a minimum flow of outside air is secured through the heat dissipation
holes that are formed by the multiplicity of reflector grill pins 224.
[0121] Therefore, it is desired that the reflector grill pins 224 are formed in such a manner
that the distances d1 and d2 therebetween are greater than 1/20λ of the operating
frequency, but is smaller than 1/10λ of the operating frequency.
[0122] Furthermore, the reflector grill pins 224, along with the above-described filter
outer panel 228, are arranged in such a manner as to cover the front surfaces of the
multiplicity of RF filters 220 and may serve as ground connections (GND) to the multiplicity
of radiation element modules 210. To this end, it is desired that the filter outer
panel 228, the filter body 221 of the RF filter 220, and the reflector grill pins
224 are all made of a metal material.
[0123] In terms of the grounding (GND) function, the reflector grill pin 224 may be defined
as a constituent element that, along with the above-described filter outer panel 228,
performs a function of expanding a common ground region between the multiplicity of
RF filters 220 and the multiplicity of radiation element modules 210.
[0124] Furthermore, the reflector grill pins 224 may not only serve as the ground connections
(GND) to the multiplicity of radiation element modules 210, but may also serve to
protect from the outside the RF filters 220 exposed to the outside air in front that
is defined as the space in front of the front surface of the front housing 140.
[0125] FIG. 27a is a cross-sectional view and a partially enlarged cross-sectional view
that are taken along line A-A on the RF module, as a single unit, in FIG. 15. FIG.
27b is a cross-sectional view and a partially enlarged cross-sectional view that are
taken along line B-B on the RF module, as a single unit, in FIG. 15.
[0126] With reference to FIG. 27a, in a state where the radiation element module 210 is
combined with the radome cover 240, when the radome cover 240 is adhesively assembled
to the back of the RF filter 220, a coupling force is exerted toward a connection
space 226a in which the through-pin terminal 226 is provided, and thus the radome
cover 240 is elastically supported on an elastic ground washer 226b arranged toward
the front of the connection space 226a. Thus, the tolerance on the assembly is achieved,
and the assembling is immediately completed at a predetermined position in a feed
through-pin coupling manner.
[0127] In addition, with reference to FIG. 27b, when the RF filter 220 and the amplification
element module 230 are brought into close contact with each other, in a case where
the through-pin terminal 229 is brought into contact with a through-pin connection
terminal 229c that is provided inside the RF filter 220 and serves as an intermediary
for electrical connection to the amplification element module 230, the through-pin
terminal 229 is elastically supported on an elastic ground washer 229b arranged toward
the back of the RF filter 220. Thus, the tolerance on the assembly is achieved, and
the assembling is immediately completed at a predetermined position in a feed through-pin
coupling manner.
[0128] Therefore, the assembling of each of the constituent elements of the RF module 200
is simply completed in a feed through-pin coupling manner. Moreover, as described
above, the RF module 200 itself is simply brought into contact with the front surface
of the main board 170 in a socket-pin coupling manner. Thus, the ease of assembly
can be greatly improved.
[0129] In this manner, the antenna apparatus 100 according to the third embodiment of the
present disclosure includes the radome covers 240, as single units, that are separated
on the basis of each RF module 200, instead of a radome of uniform shape in the related
art, and thus effectively protects each of the radiation element modules 210 and easily
discharges internal system heat generated in a mobile communication system in the
antenna system 100 in all directions, including the front direction, as well as the
rear direction. Therefore, the antenna apparatus 100 can achieve the greater performance
in heat dissipation than an antenna apparatus in the related art.
[0130] The RF module according to the first embodiment of the present disclosure and the
antenna apparatus, including the RF modules, according to the third embodiment of
the present disclosure are in detail described above with reference to the accompanying
drawings. The embodiments of the present disclosure are not necessarily limited to
the above-described implementation examples. It is to be naturally expected that various
modifications may be possibly made to the embodiments within the scope of the present
disclosure or within an equivalent thereof by a person of ordinary skill in the art
to which the present disclosure pertains. Therefore, the proper scope of the present
disclosure should be defined by the following claims.
Industrial Applicability
[0131] According to the present disclosure, there are provided an antenna RF module capable
of being arranged in the front direction to be exposed to outside air and thus distributively
dissipating heat to in front of and in back of a communication system and an antenna
apparatus including the antenna RF modules. Heat dissipation performance of the antenna
apparatus can be greatly improved.