JP2604998Y2 - Satellite broadcasting receiving antenna device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a satellite broadcast receiving antenna device.

[0002]

2. Description of the Related Art A conventional satellite broadcast receiving converter using a planar patch antenna has a structure as shown in FIG.
That is, the main body frame (1) divided into upper and lower bodies
(2), a planar patch antenna (3) adhered and fixed to the front surface of the upper frame (1), and a lower frame (2)
A conversion circuit (4) composed of an electronic circuit housed inside and a cable output interface circuit (5). The connection between the patch antenna (3) and the conversion circuit (4) is as follows. Done.

[0003] That is, the lower part of the upper frame (1) is formed in a cylindrical shape and is configured as a waveguide (6), and a planar patch antenna ( A pin (7) extending from 3) protrudes and is connected to a pin (8) set up on the other conversion circuit (4) at a high frequency. (9) is an antenna cover, and the upper and lower frames (1) and (2) are usually tightly fixed together for the purpose of waterproofing or the like.

[0004]

The conventional converter has a structure as generally described above. When it is attempted to measure the reception state of a signal (radio wave) (W) received by the planar patch antenna (3), it is difficult to measure the upper and lower positions. When the frames (1) and (2) are separated by removing bolts and the like (not shown) and an appropriate measuring system is connected below the waveguide (6) of the upper frame (1), the above-mentioned reception state can be easily measured. However, since the waveguide (6), which is a space, is provided, there is a problem that the length (L) of the entire converter is inevitably increased or signal transmission loss occurs. This invention solves such a problem.

[0005]

An antenna device for receiving satellite broadcasting according to the present invention includes a reflector, an antenna provided at a position where radio waves converge by the reflector, and attached to the front surface of a metal body case. A conversion circuit for converting a high-frequency signal received by the antenna into a predetermined electric displacement, wherein the conversion circuit is a circuit formed on a flat substrate provided on a rear surface of the main body case, and the antenna is the flat substrate. An antenna device comprising a planar patch antenna whose receiving surface is directed to the reflector with a smaller area than that of the antenna, wherein a sleeve is provided between the antenna and the conversion circuit, each upper end of which is provided in a through hole of the main body case. A satellite broadcast receiving antenna device directly connected by insulated conductor pins.

[0006]

1 is a partially cutaway sectional view of a converter for receiving satellite broadcasting. A well-known reflector (parabolic curved surface) not shown is provided on the left side of the converter (10), and a radio wave (W) collected by the reflector is focused on an antenna (11) surface attached to the front of the case. Has become. The reflector and the converter (10) constitute a satellite broadcast receiving antenna device according to the present invention. The antenna (11) of this embodiment has a known structure in which a number of rectangular patch antennas are arranged on a substrate, and the front of the antenna (11) is covered with a resin antenna cover (12).

The converter (10) of this embodiment is a main body case (13) made of aluminum die-cast which can be divided into front and rear parts.
A conversion circuit (15), which is an electronic circuit, and an interface circuit (16) are housed in the main body cases (13) and (14). (17) is a shield case made of aluminum die-casting which mainly electromagnetically shields the conversion circuit (15) from external noise.
Reference numeral 8) denotes a cable attachment terminal for outputting a video signal, an audio signal, and the like to a tuner (not shown). This terminal (1
8) and the interface circuit (16) substrate
The pin (19) protruding from the terminal (18) is connected to the circuit (1).
6) Connected to the upper printed wiring by soldering.

The conversion circuit (15) converts a high-frequency signal received by the antenna (11) into a desired frequency band. The connection between the signal input terminal of the conversion circuit (15) and the antenna (11) is established. According to this invention, it is as follows.

That is, as shown in FIG.
A metal pin (22) having Teflon (trade name) as an insulating member (21) in a sleeve shape is inserted into a through hole (20) formed in the main body case (13), and the metal pin (2) is inserted.
Both ends of 2) are connected by soldering to the output terminal of the antenna (11) and the input terminal of the conversion circuit (15), respectively.

Therefore, the high frequency signal received by the antenna (11) is directly transmitted to the conversion circuit (1) through the pin (22).
5), is converted into a desired frequency band by this circuit (15), and is then passed through an interface circuit (16).
The signal is output from the terminal (18) to a tuner or the like.

The position of the metal pin (22) may be anywhere in the front view as long as the antenna (11) and the conversion circuit (15) overlap, but from the viewpoint of suppressing the overall length of the converter (10). Each upper end as shown in FIG. 1 is preferred. In this embodiment, the terminal (18) is also mounted in such a manner as to protrude forward from the main body case (13), so that the overall length can be reduced in this respect as well.

[0012]

As described above, in the satellite broadcasting receiving antenna device according to the present invention, the length of the converter (particularly, the length in the vertical direction) can be shortened, the whole can be made compact, and the antenna can be made compact. Signal transmission loss to the conversion circuit can also be reduced. In particular, in an antenna device such as the present invention in which a small-area planar patch antenna is arranged at a position where radio waves are focused using a reflector in order to reduce the size of the entire device, the point that signal transmission loss can be reduced is that a reflector is used. This is a great advantage as compared with a so-called flat plate antenna in which radio waves are received only by a large-area flat antenna.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of a broadcast receiving converter according to the present invention.

FIG. 2 is an enlarged cross-sectional view illustrating a connection structure between an antenna and a conversion circuit.

FIG. 3 is a sectional view showing the structure of a conventional converter.

[Explanation of symbols]

 (10) Converter (11) Antenna (15) Conversion circuit (22) Conductor pin

Claims (1)

(57) [Scope of request for utility model registration] 1. A reflector , which is provided at a position where radio waves converge by the reflector , and which is attached to a front surface of a metal body case.
An attached antenna and a conversion circuit for converting a high-frequency signal received by the antenna into a predetermined electric displacement, wherein the conversion circuit is a circuit formed on a flat substrate provided on a rear surface of the main body case , And the antenna is an antenna device formed as a planar patch antenna whose receiving surface is directed to the reflector with a smaller area than the planar substrate,
Between the antenna and the conversion circuit, a sleeve insulation conductor is provided in which each upper end is provided in a through hole of the main body case.
An antenna device for receiving satellite broadcasting, wherein the antenna device is directly connected by a body pin .