[0001] The invention refers to an omnidirectional antenna to television and radio signals
reception incorporable into the roof of vehicles, during the fabrication phase or
in a subsequent processing of the same, so realizing the installation without overhanging
parts. The invented device, with universality use, is particularly usable for vehicles
such as campers, caravans, lorry-cabins, crafts and cabins in general however with
lining in nonconductive materials. The current antennas to pick up television and
radio signals are realized in rigid metal structure and are assembled on a projected
bearing part, generally a column must, which holds the same suspended onto the vehicle
roof. In said condition with its structure coming to the body, the antenna determines
a vehicle advancement resistance, consequently increasing the fuel consumption speed
being equal, and moreover it may break against the branches of the trees or other
parts with which the same antenna was coming contacted. Moreover the said assembly
presents and intrinsic fragility and it results of easy tampering. Consequently these
said drawbacks make up a big hindrance for using said current antennas on the above
cited means of transport. The invented device permits the total solution of said problems
by means of a new kind of omnidirectional antenna to pick up radio and television
signals incorporable into the vehicle body so obviating to the must use, to the presence
of a body projected part and to the necessity of paying attention to the device in
relation to is outside placing. Being this new kind of antenna realized for screen
printing molding on polystyrene sheet circular plate, its flexibility and its smallest
thickness permit the easy antenna incorporation into the body plating for interposition
between the plate structure of the outside part. Structurally the invented antenna
realizes a foundamental manufacture semplification which highly reduces the production
costs. The antenna 1 is maked for screen printing molding with conductive varnish
on circular plate 2 in polystyrene flexible sheet or other similar material on the
upper part equipped in central position with a fixing base 3 with screws 4 and with
lower holder 5, for positioning a mixing electronic circuit, from which gets out a
connector 6 for the connection to a coaxial cable 7 to put the signals received by
the antenna to a fitting amplifier before sending the same to the radio or television.
The installation can be mounted in a vehicle roof part, without conductive materials,
preliminarily foreseen into the same roof a suitable housing seat for the holder 5
so to permit the bond disposition of the plate 2 with the antenna 1 on the plate material
of the inner plating and then blocking in this position by means of the base 3 fixing
with screws 4. The incorporation is completed superimposing, for finishing the roof
structure, an impermeable plate material or other cover means. A realization form
and a possible installation version of an omnidirectional antenna according to the
invention and equipped for its installation on the roof of vehicles is showing in
drawings of sheets 1 and 2. With reference to sheet 1 fig. 1 is frontal view of the
antenna 1 making for screen printing molding, using conductive varnish with silver
base, on flexible circular plate 2 in polystyrene. Fig. 2 is perspective view of the
same antenna of fig. 1 for its installation. It is visible in central position the
fixing base 3. Fig. 3 is longitudinal section view of the same installation device
of fig. 2. In sheet 2 is illustrated a possible antenna installation system according
to the invention incorporable into the roof in a part without conductive materials.
Referring to this sheet 2 fig. 4 is longitudinal section view with decomposed parts
prepared in advance for installation with in view lower dawn the roof part with plating
formed by the parallel surface structures, a lower 8 and an upper 9 in fibreglass
or wooden base, integrated with expanded material 10 into which is foreseen a housing
seat 11 communicating with a duct 12. In intermediate position it is seen the device
to set up which on the upper part is a caoutchouc sheet 13 or other impermeable material
using for the cover. Fig. 5 is longitudinale section view of the same roof part of
fig. 4 with the antenna already installed. It is seen the disposition of the holder
5 into the seat 11 and of the coaxial cable 7, departing from the connector 6, into
the duct 12 whereas the circular plate 2 in bond condition on the surface structure
9 has been blocking in this position with all the device by means of the fixing base
3 with the screws 4. In said fig. 5 is consequently visible the incorporation condition
of the antenna installed into the roof plating by means of the completation cover
13 which maintains in constraint condition the same antenna. Fig. 6 is view for example
of a camper 14 with in position on its roof, pointed out by hatching, an invented
antenna incorporated into the same roof. In the realizations: the must and the antenna
forms, the kind of installation tools, the screen printing varnishes and each other
element could be foreseen in different way.
