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(11) | EP 4 325 881 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
| published in accordance with Art. 153(4) EPC |
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| (54) | MICROSTRIP ANTENNA STRUCTURE AND COMMUNICATION DEVICE |
| (57) The present disclosure provides a microstrip antenna structure and a communication
device, which relate to the technical field of microwave communications. In the present
disclosure, an antenna feed assembly and a coupling patch in an antenna radiation
assembly are mutually communicatively provided on a side surface of a second dielectric
plate, and an antenna ground is provided on the other side surface of the second dielectric
plate; then, a radiation patch in the antenna radiation assembly is provided on a
side surface of a first dielectric plate, and the other side surface of the first
dielectric plate is laminated over the second dielectric plate and spaced by the coupling
patch and the antenna feed assembly; the radiation patch has on the second dielectric
plate a patch projection area that at least partially overlaps with the coupling patch,
and the antenna feed assembly is distributed outside of the patch projection area
of the radiation patch. Therefore, while the communication function of the antenna
structure is realized, the feed assembly and the antenna radiation assembly are integrally
arranged on a same layer of physical structure, which decreases the overall height
of the antenna structure, reduces the space occupied thereby, and facilitates its
use. |
FIELD OF THE DISCLOSURE
[0001] The present disclosure relates to the field of microwave communications, and in particular, to a microstrip antenna structure and a communication device.
BACKGROUND OF THE DISCLOSURE
[0002] With the constant advancement of science and technology, microwave communications have been increasingly applied across various major industries, and people have put forward higher requirements for hardware performance of antennas. Microstrip antennas, with their small size, simple structure, easy manufacture, and low profile, are attracting extensive attention in the field of microwave communications.
[0003] For a conventional microstrip antenna, it is generally necessary to design a corresponding feed circuit as a separate layer of physical structure, which in turn greatly increases the overall antenna thickness, raises the level of difficulty in designing a communication system, and is not conducive to integration with other communication hardware units.
SUMMARY OF THE DISCLOSURE
[0004] In view of the above, it is an object of the present disclosure to provide a microstrip antenna structure and a communication device, which can integrally arrange a feed assembly and an antenna radiation assembly on a same layer of physical structure, thereby decreasing the overall height of the antenna structure, reducing the space occupied thereby, and facilitating its use.
[0005] In order to attain the object above, the technical solutions employed in the embodiments of the present disclosure are as follows.
[0006] According to a first aspect, the present disclosure provides a microstrip antenna structure, comprising an antenna radiation assembly, an antenna feed assembly, a first dielectric plate, a second dielectric plate, and an antenna ground, wherein the antenna radiation assembly comprises a radiation patch and a coupling patch;
The coupling patch and the antenna feed assembly are mutually communicatively provided on a side surface of the second dielectric plate, and the antenna ground is provided on the other side surface of the second dielectric plate;
The radiation patch is provided on a side surface of the first dielectric plate, and the other side surface of the first dielectric plate is laminated over the second dielectric plate and spaced by the coupling patch and the antenna feed assembly; the radiation patch has on the second dielectric plate a patch projection area that at least partially overlaps with the coupling patch, and the antenna feed assembly is located outside of the patch projection area.
[0007] In an optional implementation, the coupling patch comprises a first strip-shaped patch, a second strip-shaped patch, a third strip-shaped patch, and a fourth strip-shaped patch that are distributed annularly, and the first strip-shaped patch has a length extension direction that is perpendicular to that of the second strip-shaped patch;
The first strip-shaped patch is spaced apart from the third strip-shaped patch, and the length extension direction of the first strip-shaped patch coincides with that of the third strip-shaped patch;
The second strip-shaped patch is spaced apart from the fourth strip-shaped patch, and the length extension direction of the second strip-shaped patch coincides with that of the fourth strip-shaped patch;
In the implementation, an interval space between the first strip-shaped patch and the third strip-shaped patch merges with an interval space between the second strip-shaped patch and the fourth strip-shaped patch.
[0008] In an optional implementation, the first strip-shaped patch and the second strip-shaped patch have an identical patch size, the first strip-shaped patch and the third strip-shaped patch are centrally symmetrically distributed, and the second strip-shaped patch and the fourth strip-shaped patch are centrally symmetrically distributed.
[0009] In an optional implementation, a symmetric center between the first strip-shaped patch and the third strip-shaped patch coincides with that between the second strip-shaped patch and the fourth strip-shaped patch;
In the implementation, the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch each are at an equal distance from the symmetric center.
[0010] In an optional implementation, the antenna feed assembly comprises a signal transmission strip and a plurality of feed connection strips, and the feed connection strips have a total number of less than four;
The signal transmission strip is in communication with the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch through the plurality of feed connection strips, and each of the feed connection strips is configured to communicate respective end portions of any pair of adjacent strip-shaped patches among the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch, which end portions are distal from the interval space.
[0011] In an optional implementation, where the feed connection strips have a total number of two, the plurality of feed connection strips comprise a first connection strip and a second connection strip, and the signal transmission strip comprises a first transmission strip and a second transmission strip;
The first connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch distal from the interval space;
The second connection strip has one end in communication with an end portion of the third strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
In the implementation, the first transmission strip is in communication with an end portion of the first strip-shaped patch distal from the interval space, and the second transmission strip is in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
Or, the first transmission strip is in communication with an end portion of the second strip-shaped patch distal from the interval space, and the second transmission strip is in communication with an end portion of the third strip-shaped patch distal from the interval space;
Or, the first transmission strip is in direct communication with the first connection strip, and the second transmission strip in direct communication with the second connection strip.
[0012] In an optional implementation, where the feed connection strips have a total number of three, the plurality of feed connection strips comprise a first connection strip, a second connection strip, and a third connection strip;
The first connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch distal from the interval space;
The second connection strip has one end in communication with an end portion of the third strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
The third connection strip has one end in communication with an end portion of the second strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the third strip-shaped patch distal from the interval space;
The signal transmission strip is in communication with an end portion of the first strip-shaped patch or the fourth strip-shaped patch distal from the interval space; or the signal transmission strip is in direct communication with one of the first connection strip, the second connection strip, and the third connection strip.
[0013] In an optional implementation, where the feed connection strips has a total number of three, the plurality of feed connection strips comprise a first connection strip, a second connection strip, and a fourth connection strip;
The first connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch distal from the interval space;
The second connection strip has one end in communication with an end portion of the third strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
The fourth connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
The signal transmission strip is in direct communication with one of the first connection strip, the second connection strip, and the fourth connection strip.
[0014] In an optional implementation, the second dielectric plate is provided with a plurality of isolation holes that run through the second dielectric plate, wherein the plurality of isolation holes are distributed around the antenna feed assembly and are in communication with the antenna ground.
[0015] According to a second aspect, the present disclosure provides a communication device, comprising at least one microstrip antenna structure according to any one of the foregoing implementations.
[0016] In this case, the beneficial effects of the embodiments of the present disclosure include the following.
[0017] In the present disclosure, the antenna feed assembly and the coupling patch in the antenna radiation assembly are mutually communicatively provided on a side surface of the second dielectric plate, and the antenna ground is provided on the other side surface of the second dielectric plate; then, the radiation patch in the antenna radiation assembly is provided on a side surface of the first dielectric plate, and the other side surface of the first dielectric plate is laminated over the second dielectric plate and spaced by the coupling patch and the antenna feed assembly; the radiation patch has on the second dielectric platea patch projection area that at least partially overlaps with the coupling patch, and the antenna feed assembly is distributed outside of the patch projection area of the radiation patch, so as to form an antenna feed point in the patch projection area of the radiation patch through the coupling patch, ensuring that the antenna feed assembly can perform signal coupling and transmission through the coupling patch and the radiation patch. Therefore, while the communication function of the antenna structure is realized, the feed assembly and the antenna radiation assembly are integrally arranged on a same layer of physical structure, which decreases the overall height of the antenna structure, reduces the space occupied thereby, and facilitates its use.
[0018] In order to make the above objects, features and advantages of the present disclosure more apparent, preferred embodiments are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings to be used in the embodiments will be briefly introduced below. It should be understood that the following figures are only illustrative of certain embodiments of the present disclosure, and therefore should not be regarded as limiting to its scope. For those skilled in the art, other related drawings could also be obtained from these drawings without exercise of any ingenuity.
FIG. 1 is a diagram of composition of a microstrip antenna structure according to an embodiment of the present disclosure;
FIG. 2 is a first diagram of communication between an antenna feed assembly and a coupling patch according to an embodiment of the present disclosure;
FIG. 3 is a second diagram of communication between an antenna feed assembly and a coupling patch according to an embodiment of the present disclosure;
FIG. 4 is a third diagram of communication between an antenna feed assembly and a coupling patch according to an embodiment of the present disclosure; and
FIG. 5 is a fourth diagram of communication between an antenna feed assembly and a coupling patch according to an embodiment of the present disclosure.
[0020] Reference numbers in the figures include: 100-microstrip antenna structure; 110-antenna radiation assembly; 111-radiation patch;112-coupling patch; 113-first strip-shaped patch; 114-second strip-shaped patch; 115-third strip-shaped patch; 116-fourth strip-shaped patch; 120-antenna feed assembly; 130-first dielectric plate; 140-second dielectric plate; 150-antenna ground; 121-feed connection strip; 122-signal transmission strip; 123-first connection strip; 124-second connection strip; 125-third connection strip; 126-fourth connection strip; 127-first transmission strip; 128-second transmission strip; 160-isolation hole.
DETAILED IMPLEMENTATION OF THE DISCLOSURE
[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the embodiments described herein are some, but not all, embodiments of the present disclosure. The components in the embodiments of the present disclosure described and illustrated herein may generally be arranged and designed in a variety of different configurations.
[0022] Accordingly, the following detailed description of the embodiments of the present disclosure as provided in the accompanying drawings is not intended to limit the scope of the present disclosure, but merely to indicate selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained without exercise of ingenuity by a person of ordinary skill in the art fall within the scope of protection of the present disclosure.
[0023] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent ones.
[0024] In the description of the present disclosure, it should be noted that an orientation or a positional relationship indicated by the terms "central", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like, if any, is based on that shown in the drawings, or that of the product of the present disclosure as it is in use. This is only for ease and simplicity of description, without indicating or implying that the device or the element referred to must have a specific orientation, or be constructed and operated in a particular orientation, and thus it should not be construed as limiting to the present disclosure.
[0025] In addition, the terms "first", "second" and the like are merely used to distinguish one entity or operation from another, and do not necessarily require or imply that any such actual relationship or order exists between these entities or operations. Moreover, the terms "including", "comprising", or any other variant thereof, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also other elements not expressly listed, or elements that are inherent to such process, method, article or apparatus. Without further limitation, the fact that an element is defined by the phrase "comprising a ......" does not preclude the existence of additional identical elements in the process, method, article or apparatus that comprises the element.
[0026] In the description of the present disclosure, it should also be noted that, unless otherwise expressly specified or defined, the terms "provided", "mounted", "coupled" and "connected" and the like are to be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, or an indirect connection through an intermediary, or an internal communication of two elements. For a person of ordinary skill in the art, the specific meanings of these terms in the present disclosure may be understood in specific contexts.
[0027] Some embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. The following embodiments and features therein may be combined with each other in the absence of conflicts.
[0028] Referring to FIG. 1, FIG. 1 is a diagram of composition of a microstrip antenna 100 structure according to an embodiment of the present disclosure. In this embodiment of the present disclosure, the microstrip antenna structure 100 is capable of integrally arranging a feed assembly and an antenna radiation assembly on a same layer of physical structure while realizing its own antenna communication function, thereby decreasing the overall height of the antenna structure, reducing the space occupied thereby, and facilitating its use. The microstrip antenna structure100maycomprise an antenna radiation assembly110, an antenna feed assembly120, a first dielectric plate130, a second dielectric plate140, and an antenna ground 150.
[0029] In this embodiment, the antenna radiation assemb1y110comprises a radiation patch111and a coupling patch112, wherein the radiation patch111is configured to implement a signal transceiving function, and the coupling patch112is configured to establish a signal coupling relationship with the radiation patch111, such that on the one hand, a hardware structure having an antenna feed function uses the coupling patch112 to transmit, by means of signal coupling, a to-be-transmitted electromagnetic wave signal to the radiation patch111 for signal transmission processing, and on the other hand, the radiation patch111transmits, by means of signal coupling, the received electromagnetic wave signal to the coupling patch112, which coupling patch112transmits the received electromagnetic wave signal to the hardware structure having an antenna feed function. The radiation patch 111 may have a patch shape that is, but not limited to, any one of a circle, an ellipse, a square, a polygon, and the like.
[0030] In this embodiment, the antenna feed assembly120is configured to implement an antenna feed function of the microstrip antenna structure100, and the antenna ground150is configured to implement a grounding function of the microstrip antenna structure100. The coupling patch112and the antenna feed assembly120are provided on a same side surface of the second dielectric plate140, and the coupling patch112is in communication with the antenna feed assembly120, so that the antenna feed assembly120performs signal coupling and transmission through the coupling patch 112 and the radiation patch 111. The antenna ground150is provided on the other side surface of the second dielectric plate140.
[0031] In this embodiment, the radiation patch111is provided on a side surface of the first dielectric plate130, and the other side surface of the first dielectric plate130is laminated over the second dielectric plate140and spaced by the coupling patch 112 and the antenna feed assembly 120; the radiation patch 111 has on the second dielectric plate 140 a patch projection area that at least partially overlaps with the coupling patch 112, so as to form an antenna feed point in the patch projection area of the radiation patch111through the coupling patch112, which facilitates establishing a signal transmission relationship between the antenna feed assembly 120 and the radiation patch111; meanwhile, the antenna feed assembly 120 is distributed outside of the patch projection area of the radiation patch 111, so as to prevent the antenna feed assembly 120from interfering with the signal coupling performance of the coupling patch112as much as possible, thereby ensuring that the antenna feed assembly120canperform signal coupling and transmission through the coupling patch 112 and the radiation patch 111.
[0032] As such, while the present disclosure realizes the communication function of the microstrip antenna structure 100, the antenna feed assembly120and the antenna radiation assembly110are integrally arranged on a same layer of physical structure, which decreases the overall height of the antenna structure, reduces the space occupied thereby, and facilitates its use.
[0033] In this embodiment of the present disclosure, the coupling patch112maycomprise a plurality of strip-shaped patches, and the coupling patch112forms a plurality of antenna feed points in the patch projection area of the radiation patch111through the plurality of strip-shaped patches, so as to extend the microstrip antenna structure100to a multi-feed-point antenna. The strip-shaped patches may have a number of two, three, four, or more, each strip-shaped patch correspondingly forming one antenna feed point. Taking two strip-shaped patches for example, the two strip-shaped patches may be distributed in a manner that their length extension directions are perpendicular to each other; taking three strip-shaped patches for example, the three strip-shaped patches may be distributed in a manner that their length extension directions form 120° angles relative to each other. The specific implementation of the coupling patch112is illustrated below by taking four strip-shaped patches for example.
[0034] Referring to FIG. 2, FIG. 2 is a first diagram of communication between the antenna feed assembly 120 and the coupling patch 112 according to an embodiment of the present disclosure. In this embodiment, the four strip-shaped patches comprised in the coupling patch112 may be represented as a first strip-shaped patch113, a second strip-shaped patch114, a third strip-shaped patch115, and a fourth strip-shaped patch116, respectively.
[0035] In this embodiment, the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116are annularly distributed on the second dielectric plate140, and the first strip-shaped patch113 has a length extension direction that is perpendicular to that of the second strip-shaped patch114. The first strip-shaped patch113is spaced apart from the third strip-shaped patch 115, and the first strip-shaped patch 113 has a length extension direction that coincides with that of the third strip-shaped patch1 15, so as to arrange the first strip-shaped patch113and the third strip-shaped patch115on a same straight line in a spaced manner. The second strip-shaped patch114is spaced apart from the fourth strip-shaped patch 116, and the second strip-shaped patch114has a length extension direction that coincides with that of the fourth strip-shaped patch116, so as to arrange the second strip-shaped patch114and the fourth strip-shaped patch116on a same straight line in a spaced manner. An interval space between the first strip-shaped patch113and the third strip-shaped patch115merges with that between the second strip-shaped patch114and the fourth strip-shaped patch116.Accordingly, the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch1 16present a cross-like distribution as a whole (the respective length extension directions of adjacent strip-shaped patches are perpendicular to each other), so that each of the first strip-shaped patch 113, the second strip-shaped patch 114, the third strip-shaped patch 115, and the fourth strip-shaped patch 116 uses an end portion proximate to the interval space as one antenna feed point of the microstrip antenna structure100,making electromagnetic wave signals transmitted through the four strip-shaped patches exhibit a phase difference that is a multiple of 90°.
[0036] In this embodiment, the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116 each may have identical, partially identical, or completely different patch sizes, and the specific patch size may be configured differently by an antenna designer according to needs of antenna communication performances. In an implementation of this embodiment, the first strip-shaped patch113and the second strip-shaped patch114have an identical patch size, the first strip-shaped patch113and the third strip-shaped patch115are centrally symmetrically distributed, and the second strip-shaped patch114and the fourth strip-shaped patch116are centrally symmetrically distributed; at this time, the first strip-shaped patch113,the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116each have an identical patch size.
[0037] In this embodiment, if the first strip-shaped patch113and the second strip-shaped patch114 have an identical patch size, the first strip-shaped patch113and the third strip-shaped patch115are centrally symmetrically distributed, and the second strip-shaped patch114and the fourth strip-shaped patch116are centrally symmetrically distributed, then a symmetric center between the first strip-shaped patch113and the third strip-shaped patch115 may coincide with that between the second strip-shaped patch 114 and the fourth strip-shaped patch 116, or may not coincide therewith, and the distance from the first strip-shaped patch 113 and the third strip-shaped patch 115 to a corresponding symmetric center may be the same as or different from that from the second strip-shaped patch 114 and the fourth strip-shaped patch 116 to a corresponding symmetric center. The specific coincidence of the symmetric center(s) and/or the distance(s)to the corresponding symmetric center(s) may also be differently configured by antenna designers according to requirements for antenna communication performance.
[0038] In an implementation of this embodiment, to stabilize the signal coupling performance of the coupling patch112, where the first strip-shaped patch 113, the second strip-shaped patch 114, the third strip-shaped patch 115, and the fourth strip-shaped patch 116 each have an identical patch size, the symmetric center between the first strip-shaped patch113and the third strip-shaped patch115 may be designed to be in a state of coinciding with that between the second strip-shaped patch 114 and the fourth strip-shaped patch 116, and the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116 each are at an equal distance from the symmetric center.
[0039] In this embodiment of the present disclosure, when the coupling patch112comprises the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116, to ensure that the antenna feed assembly120cancooperate with the four strip-shaped patches to express a specific antenna polarization mode of the microstrip antenna structure100, the antenna feed assembly120 may construct the antenna polarization of the microstrip antenna structure100through a signal transmission strip122and a plurality of feed connection strips121 as comprised therein, where the antenna polarization mode of the microstrip antenna structure100 may be any one of a dual circular polarization mode, a left-hand circular polarization mode, a right-hand circular polarization mode, and a linear polarization mode.
[0040] In this embodiment, the signal transmission strip122is configured to serve as an electromagnetic wave signal input/output port of the antenna feed assembly120, and the signal transmission strip122needs to communicate with the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116through the plurality of feed connection strips121, so as to construct the specific antenna polarization mode of the microstrip antenna structure100. In this process, each of the feed connection strips121is configured to communicate respective end portions of any pair of adjacent strip-shaped patches among the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patches116, which end portions are distal from the interval space. In addition, the feed connection strips 121 need to have a total number of less than four to prevent the plurality of feed connection strips 121from communicating with each other to form a closed-loop structure, thereby preventing the antenna feed assembly120from being short-circuited, and avoiding the phenomenon that the antenna polarization mode cannot be realized.
[0041] Optionally, referring to FIG. 2, in this embodiment, if the antenna polarization of the microstrip antenna structure100needs to be constructed as a dual circular one, it is necessary to have two feed connection strips121 and divide the signal transmission strip 122 into two transmission strips that operates independently. At this time, it is necessary to communicate each of the four strip-shaped patches comprised in the coupling patch 112 with only one strip-shaped patch by adopting the two feed connection strips 121, to have the two feed connection strips 121 diagonally distributed, and then to mount the two transmission strips on respective end portions of a pair of uncommunicated adjacent strip-shaped patches, which end portions are distal from the interval space, or to mount the two transmission strips on one feed connection strip 121 respectively, so that a dual circular polarization of the antenna is achieved through such communication between the antenna feed assembly 120 and the four strip-shaped patches.
[0042] For example, the first strip-shaped patch113 is communicated with the second strip-shaped patch 114 through one feed connection strip 121, and the third strip-shaped patch115 is communicated with the fourth strip-shaped patch 116 through the other feed connection strip121. At this time, one transmission strip may be mounted on the first strip-shaped patch113, and the other transmission strip on the fourth strip-shaped patch116, so as to realize dual circular polarization of the antenna; or, one transmission strip may be mounted on the second strip-shaped patch114, and the other transmission strip on the third strip-shaped patch115, so as to realize the dual circular polarization of the antenna; or, one transmission strip may be mounted directly on the feed connection strip121between the first strip-shaped patch113and the second strip-shaped patch114, and the other transmission strip directly on the feed connection strip121between the third strip-shaped patch115and the fourth strip-shaped patch116, so as to realize dual circular polarization of the antenna.
[0043] Or, the first strip-shaped patch113 is communicated with the fourth strip-shaped patch 116 through one feed connection strip121, and the third strip-shaped patch115 is communicated with the second strip-shaped patch 114 through the other feed connection strip121. At this time, one transmission strip may be mounted on the first strip-shaped patch113, and the other transmission strip on the second strip-shaped patch114,so as to realize dual circular polarization of the antenna; or, one transmission strip may be mounted on the third strip-shaped patch115, and the other transmission strip on the fourth strip-shaped patch116, so as to realize dual circular polarization of the antenna; or, one transmission strip may be mounted directly on the feed connection strip121between the first strip-shaped patch113and the fourth strip-shaped patch116, and the other transmission strip directly on the feed connection strip121between the third strip-shaped patch115and the second strip-shaped patch1 14,so as to realize dual circular polarization of the antenna.
[0044] In an implementation of this embodiment, where the feed connection strips121has a total number of two, the plurality of feed connection strips121comprise a first connection strip123and a second connection strip124, and the signal transmission strip122comprises a first transmission strip127and a second transmission strip128. At this time, the first connection strip123has one end in communication with an end portion of the first strip-shaped patch113 distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch114 distal from the interval space, while the second connection strip124has one end in communication with an end portion of the third strip-shaped patch115 distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch116 distal from the interval space. Then, the first transmission strip127 may be communicated with an end portion of the first strip-shaped patch113 distal from the interval space, and the second transmission strip128with an end portion of the fourth strip-shaped patch 116 distal from the interval space; or, the first transmission strip 127 may be communicated with an end portion of the second strip-shaped patch 114 distal from the interval space, and the second transmission strip 128 with an end portion of the third strip-shaped patch 115 distal from the interval space; or, the first transmission strip127is directly communicated with the first connection strip 123, and the second transmission strip128is directly communicated with the second connection strip124. In so doing, a dual circular polarization effect of the antenna is achieved.
[0045] Referring to FIG. 2, the dual circular polarization conditions of the microstrip antenna structure 100are briefly described below by taking it as an example that the first transmission strip 127is in communication with an end portion of the first strip-shaped patch113 distal from the interval space, and the second transmission strip128is in communication with an end portion of the fourth strip-shaped patch116 distal from the interval space. Assuming that an electromagnetic wave signal transmitted by the first transmission strip127and the first strip-shaped patch113has a signal amplitude of M1 and a signal phase of P1, and an electromagnetic wave signal transmitted by the first transmission strip127and the second strip-shaped patch114has a signal amplitude of M2 and a signal phase of P2, then the two electromagnetic wave signals generally satisfy that M1=M2, and P1-P2=90°.Assuming that an electromagnetic wave signal transmitted by the second transmission strip128and the third strip-shaped patch115has a signal amplitude of M3 and a signal phase of P3, and an electromagnetic wave signal transmitted by the second transmission strip128and the fourth strip-shaped patch116has a signal amplitude of M4 and a signal phase of P4, then the two electromagnetic wave signals generally satisfy that M3 = M4, and P3-P4 = -90°.
[0046] Optionally, referring to FIG. 3 and FIG. 4, FIG. 3 is a second diagram of communication between the antenna feed assembly120and the coupling patch112according to an embodiment of the present disclosure, and FIG. 4 is a third diagram of communication between the antenna feed assembly120and the coupling patch112according to an embodiment of the present disclosure. In this embodiment, if the antenna polarization of the microstrip antenna structure100needs to be constructed as a single circular one (a left-hand circular polarization or a right-hand circular polarization), it is necessary to have three feed connection strips121 in cooperation with the signal transmission strip122. At this time, the four strip-shaped patches comprised in the coupling patch 112 need to be rendered in communication by adopting the three feed connection strips 121; then, the signal transmission strip122is mounted on an end portion of one of a pair of adjacent strip-shaped patches that are not directly communicated with a feed connection strip 121, which end portion is distal from the interval space; or, the signal transmission strip122is mounted on any one of the three feed connection strips121. In so doing, a single circular polarization effect of the antenna is achieved through such communication between the antenna feed assembly120and the four strip-shaped patches.
[0047] For example, the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116are rendered in communication through three feed connection strips121; at this time, if the second strip-shaped patch114is not directly communicated with the third strip-shaped patch 115with a feed connection strip121, the signal transmission strip122 may be directly mounted on the second strip-shaped patch114to realize left-hand circular polarization; or, the signal transmission strip 122 is directly mounted on the third strip-shaped patch 115 to realize right-hand circular polarization; or, the signal transmission strip122is directly mounted on one of the three feed connection strips121to realize left-hand/right-hand circular polarization.
[0048] If the first strip-shaped patch113 is not directly communicated with the fourth strip-shaped patch 116 with a feed connection strip121, the signal transmission strip122 may be directly mounted on the fourth strip-shaped patch116to realize the left-hand circular polarization mode; or, the signal transmission strip122is directly mounted on the first strip-shaped patch113to realize the right-hand circular polarization mode; or, the signal transmission strip122is directly mounted on one of the three feed connection strips121to realize the left-hand/right-hand circular polarization mode.
[0049] If the first strip-shaped patch113 is not directly communicated with the second strip-shaped patch 114with a feed connection strip 121, the signal transmission strip122 may be directly mounted on the first strip-shaped patch113to realize the left-hand circular polarization mode; or, the signal transmission strip122is directly mounted on the second strip-shaped patch114to realize the right-hand circular polarization mode; or, the signal transmission strip122is directly mounted on one of the three feed connection strips121to realize the left-hand/right-hand circular polarization mode.
[0050] If the third strip-shaped patch115 is not directly communicated with the fourth strip-shaped patch 116 with a feed connection strip 121, the signal transmission strip122 may be directly mounted on the third strip-shaped patch115to realize the left-hand circular polarization mode; or, the signal transmission strip122is directly mounted on the fourth strip-shaped patch116to realize the right-hand circular polarization mode; or, the signal transmission strip122is directly mounted on one of the three feed connection strips121to realize the left-hand/right-hand circular polarization mode.
[0051] In an implementation of this embodiment, where the feed connection strips121have a total number of three, the plurality of feed connection strips121comprise a first connection strip123, a second connection strip124, and a third connection strip 125. The first connection strip123 has one end in communication with an end portion of the first strip-shaped patch113 distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch114 distal from the interval space. The second connection strip124 has one end in communication with an end portion of the third strip-shaped patch115 distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch116 distal from the interval space. The third connection strip125 has one end in communication with an end portion of the second strip-shaped patch114distal from the interval space, and the other end in communication with an end portion of the third strip-shaped patch115 distal from the interval space. At this time, the signal transmission strip122 may be communicated with an end portion of the first strip-shaped patch113 distal from the interval space, so as to realize the right-hand circular polarization mode; or, the signal transmission strip122 may be communicated with an end portion of the fourth strip-shaped patch116 distal from the interval space, so as to realize the left-hand circular polarization mode; or, the signal transmission strip122 may be directly communicated with any one of the first connection strip123, the second connection strip 124,and the third connection strip 125to realize the left-hand/right-hand circular polarization mode. In so doing, a single circular polarization effect of the antenna is achieved.
[0052] Referring to FIG. 3, the right-hand circular polarization conditions of the microstrip antenna structure100are briefly described below by taking it as an example that the signal transmission strip 122 is in communication with an end portion of the first strip-shaped patch 113 distal from the interval space. Assuming that an electromagnetic wave signal transmitted by the signal transmission strip122and the first strip-shaped patch113has a signal amplitude of M1 and a signal phase of P1, an electromagnetic wave signal transmitted by the signal transmission strip122and the second strip-shaped patch114has a signal amplitude of M2 and a signal phase of P2, an electromagnetic wave signal transmitted by the signal transmission strip122and the third strip-shaped patch115has a signal amplitude of M3 and a signal phase of P3, and an electromagnetic wave signal transmitted by the signal transmission strip122and the fourth strip-shaped patch116has a signal amplitude of M4 and a signal phase of P4, then the four electromagnetic wave signals generally satisfy that M1 = M2 = M3 = M4, and P1 = P2 +90° = P3 +180° = P4 +270°.
[0053] Referring to FIG. 4, the left-hand circular polarization conditions of the microstrip antenna structure100are briefly described below by taking it as an example that the signal transmission strip 122 is in communication with an end portion of the fourth strip-shaped patch 116 distal from the interval space. Assuming that an electromagnetic wave signal transmitted by the signal transmission strip122and the first strip-shaped patch113 has a signal amplitude of M1 and a signal phase of P1, an electromagnetic wave signal transmitted by the signal transmission strip122and the second strip-shaped patch114 has a signal amplitude of M2 and a signal phase of P2, an electromagnetic wave signal transmitted by the signal transmission strip122and the third strip-shaped patch115 has a signal amplitude of M3 and a signal phase of P3, and an electromagnetic wave signal transmitted by the signal transmission strip122and the fourth strip-shaped patch116 has a signal amplitude of M4 and a signal phase of P4, then the four electromagnetic wave signals generally satisfy that M1 = M2 = M3 = M4, and P1 = P2-90° = P3-180° = P4-270°.
[0054] Optionally, referring to FIG. 5, FIG. 5 is a fourth diagram of communication between the antenna feed assembly120and the coupling patch112according to an embodiment of the present disclosure. In this embodiment, if the antenna polarization mode of the microstrip antenna structure100needs to be constructed as a linear one, it may also be realized through three feed connection strips121 in cooperation with the signal transmission strip122; at this time, the four strip-shaped patches comprised in the coupling patch 112 need to be rendered in communication with the three feed connection strips 121, and then, the signal transmission strip122is mounted on any one of the three feed connection strips121, such that a linear polarization effect of the antenna is achieved through such communication between the antenna feed assembly120and the four strip-shaped patches.
[0055] For example, the first strip-shaped patch113, the second strip-shaped patch114, the third strip-shaped patch115, and the fourth strip-shaped patch116are rendered in communication through three feed connection strips121, where the signal transmission strip122 may be directly mounted on any one of the three feed connection strips121to construct linear polarization meeting a polarization angle desired by antenna designers.
[0056] In an implementation of this embodiment, where the feed connection strips121has a total number of three, the plurality of feed connection strips121comprise a first connection strip123, a second connection strip124, and a fourth connection strip 126. The first connection strip123 has one end in communication with an end portion of the first strip-shaped patch113 distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch114distal from the interval space. The second connection strip124 has one end in communication with an end portion of the third strip-shaped patch1 15 distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch116 distal from the interval space. The fourth connection strip 126 has one end in communication with an end portion of the first strip-shaped patch113 distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch116 distal from the interval space. At this time, the signal transmission strip122 may be directly communicated with any one of the first connection strip123, the second connection strip124, and the fourth connection strip 126, so as to achieve a linear polarization effect of the antenna.
[0057] Referring to FIG. 5, the linear polarization conditions of the microstrip antenna structure100are briefly described below by taking it as an example that the signal transmission strip122 is directly communicated with the fourth connection strip126. Assuming that an electromagnetic wave signal transmitted by the signal transmission strip122and the first strip-shaped patch113 has a signal amplitude of M1 and a signal phase of P1, an electromagnetic wave signal transmitted by the signal transmission strip122and the second strip-shaped patch114 has a signal amplitude of M2 and a signal phase of P2, an electromagnetic wave signal transmitted by the signal transmission strip122and the third strip-shaped patch115 has a signal amplitude of M3 and a signal phase of P3,an electromagnetic wave signal transmitted by the signal transmission strip122and the fourth strip-shaped patch116 has a signal amplitude of M4 and a signal phase of P4, an electromagnetic wave signal transmitted by the signal transmission strip122 and the communicated end portion of the first strip-shaped patch113 has a signal amplitude of M5 and a signal phase of P5, and an electromagnetic wave signal transmitted by the signal transmission strip 122 and the communicated end portion of the fourth strip-shaped patch 116 has a signal amplitude of M6 and a signal phase of P6, then the six electromagnetic wave signals generally satisfy that M1 = M2 = M3 = M4, P1-P2 = 90°, P4-P3 = 90°, and M5 = M6; at this time, the microstrip antenna structure 100 has a linear polarization angle of P7 = (P5-P6)/2; the value of P7 may be adjusted by changing the connection positions of the signal transmission strip122on the first connection strip 123, the second connection strip 124, and the fourth connection strip126, so as to construct linear polarization meeting a polarization angle desired by antenna designers.
[0058] Accordingly, the present disclosure may construct a matched antenna polarization mode according to requirements of antenna designers by means of the signal transmission strip 122 and the plurality of feed connection strips 121 in cooperation with four strip-shaped patches comprised in the coupling patch 112.The feed connection strips121 may have a shape that is, but not limited to, an arc shape, an elongated shape, or any curved shape having a curved portion.
[0059] Optionally, referring again to FIG. 1 to FIG. 5, in the embodiments of the present disclosure, to further reduce the signal radiation interference of the antenna feed assembly120 with the antenna radiation assembly110, a plurality of isolation holes 160 that run through the second dielectric plate 140 may be provided on the second dielectric plate140;the plurality of isolation holes160are distributed around the antenna feed assembly 120and are in communication with the antenna ground150, thereby reducing the signal radiation interference of the antenna feed assembly120 with the antenna radiation assembly110. In an implementation of the embodiments, the plurality of isolation holes160 may be provided on two sides of each feed connection strip121comprised in the antenna feed assembly120.
[0060] The present disclosure may further provide a communication device, which uses at least one microstrip antenna structure100to realize its own communication function. In an implementation of this embodiment, a plurality of the microstrip antenna structures100 may be arrayed to form an antenna array to be integrated with other communication hardware units.
[0061] In summary, in the microstrip antenna structure and the communication device according to the embodiments of the present disclosure, the antenna feed assembly and the coupling patch in the antenna radiation assembly are mutually communicatively provided on a side surface of the second dielectric plate, and the antenna ground is provided on the other side surface of the second dielectric plate; then, the radiation patch in the antenna radiation assembly is provided on a side surface of the first dielectric plate, and the other side surface of the first dielectric plate is laminated over the second dielectric plate and spaced by the coupling patch and the antenna feed assembly; the radiation patch on the second dielectric plate has a patch projection area that at least partially overlaps with the coupling patch, and the antenna feed assembly is distributed outside of the patch projection area of the radiation patch, so as to form an antenna feed point in the patch projection area of the radiation patch through the coupling patch, and to ensure that the antenna feed assembly can perform signal coupling and transmission through the coupling patch and the radiation patch. Therefore, while the communication function of the antenna structure is realized, the feed assembly and the antenna radiation assembly are integrally arranged on a same layer of physical structure, which decreases the overall height of the antenna structure, reduces the space occupied thereby, and facilitates its use.
[0062] The foregoing are only various embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any skilled person in the art could readily conceive of changes or substitutions within the technical scope disclosed herein, which should all be covered by the scope of the present disclosure. Therefore, the scope of the present disclosure shall be defined by the appending claims.
1. A microstrip antenna structure, wherein the microstrip antenna structure comprises
an antenna radiation assembly, an antenna feed assembly, a first dielectric plate,
a second dielectric plate, and an antenna ground, the antenna radiation assembly comprising
a radiation patch and a coupling patch;
the coupling patch and the antenna feed assembly being mutually communicatively provided on a side surface of the second dielectric plate, and the antenna ground being provided on the other side surface of the second dielectric plate;
the radiation patch being provided on a side surface of the first dielectric plate, and the other side surface of the first dielectric plate being laminated over the second dielectric plate and spaced by the coupling patch and the antenna feed assembly, wherein the radiation patch has on the second dielectric plate a patch projection area that at least partially overlaps with the coupling patch, the antenna feed assembly being located outside of the patch projection area;
wherein the coupling patch comprises a first strip-shaped patch, a second strip-shaped patch, a third strip-shaped patch, and a fourth strip-shaped patch that are annularly distributed, the first strip-shaped patch having a length extension direction that is perpendicular to that of the second strip-shaped patch;
wherein the first strip-shaped patch is spaced apart from the third strip-shaped patch, the length extension direction of the first strip-shaped patch coinciding with that of the third strip-shaped patch;
wherein the second strip-shaped patch is spaced apart from the fourth strip-shaped patch, the length extension direction of the second strip-shaped patch coinciding with that of the fourth strip-shaped patch;
and wherein an interval space between the first strip-shaped patch and the third strip-shaped patch merges with that between the second strip-shaped patch and the fourth strip-shaped patch.
2. The microstrip antenna structure according to claim 1, wherein the first strip-shaped
patch and the second strip-shaped patch have an identical patch size, wherein the
first strip-shaped patch and the third strip-shaped patch are centrally symmetrically
distributed, and wherein the second strip-shaped patch and the fourth strip-shaped
patch are centrally symmetrically distributed.
3. The microstrip antenna structure according to claim 2, wherein a symmetric center
between the first strip-shaped patch and the third strip-shaped patch coincides with
that between the second strip-shaped patch and the fourth strip-shaped patch,
and wherein the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch each are at an equal distance from the symmetric center.
and wherein the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch each are at an equal distance from the symmetric center.
4. The microstrip antenna structure according to any one of claims 1-3, wherein the antenna
feed assembly comprises a signal transmission strip and a plurality of feed connection
strips, the feed connection strips having a total number of less than four;
wherein the signal transmission strip is in communication with the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch through the plurality of feed connection strips, wherein each of the feed connection strips is configured to communicate respective end portions of any pair of adjacent strip-shaped patches among the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch and the fourth strip-shaped patch, which end portions are distal from the interval space.
wherein the signal transmission strip is in communication with the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch, and the fourth strip-shaped patch through the plurality of feed connection strips, wherein each of the feed connection strips is configured to communicate respective end portions of any pair of adjacent strip-shaped patches among the first strip-shaped patch, the second strip-shaped patch, the third strip-shaped patch and the fourth strip-shaped patch, which end portions are distal from the interval space.
5. The microstrip antenna structure according to claim 4, wherein where the feed connection
strips have a total number of two, the plurality of feed connection strips comprise
a first connection strip and a second connection strip, and the signal transmission
strip comprises a first transmission strip and a second transmission strip;
wherein the first connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch distal from the interval space;
wherein the second connection strip has one end in communication with an end portion of the third strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
wherein the first transmission strip is in communication with an end portion of the first strip-shaped patch distal from the interval space, and wherein the second transmission strip is in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
or, wherein the first transmission strip is in communication with an end portion of the second strip-shaped patch distal from the interval space, and the second transmission strip in communication with an end portion of the third strip-shaped patch distal from the interval space;
or, wherein the first transmission strip is in direct communication with the first connection strip, and the second transmission strip in direct communication with the second connection strip.
6. The microstrip antenna structure according to claim 4, wherein where the feed connection
strips have a total number of three, the plurality of feed connection strips comprise
a first connection strip, a second connection strip, and a third connection strip;
wherein the first connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch distal from the interval space;
wherein the second connection strip has one end in communication with an end portion of the third strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
wherein the third connection strip has one end in communication with an end portion of the second strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the third strip-shaped patch distal from the interval space;
and wherein the signal transmission strip is in communication with an end portion of the first strip-shaped patch or the fourth strip-shaped patch distal from the interval space, or the signal transmission strip is in direct communication with one of the first connection strip, the second connection strip, and the third connection strip.
7. The microstrip antenna structure according to claim 4, wherein where the feed connection
strips have a total number of three, the plurality of feed connection strips comprise
a first connection strip, a second connection strip, and a fourth connection strip;
wherein the first connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the second strip-shaped patch distal from the interval space;
wherein the second connection strip has one end in communication with an end portion of the third strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
wherein the fourth connection strip has one end in communication with an end portion of the first strip-shaped patch distal from the interval space, and the other end in communication with an end portion of the fourth strip-shaped patch distal from the interval space;
and wherein the signal transmission strip is in direct communication with one of the first connection strip, the second connection strip, and the fourth connection strip.
8. The microstrip antenna structure according to claim 1, wherein the second dielectric
plate is provided with a plurality of isolation holes that run through the second
dielectric plate, and wherein the plurality of isolation holes are distributed around
the antenna feed assembly and are in communication with the antenna ground.
9. A communication device, wherein the communication device comprises at least one microstrip
antenna structure according to any one of claims 1-8.