JPS5848805Y2 - Assembly type simple parabolic antenna - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a simple assembly type parabolic anti for microwave reception.

For example, SHF using microwaves in the 12 GHz band
Broadcasting is seen as promising as the next generation of television broadcasting.

However, if we consider the radio wave reception equipment in each home, etc.
For example, the first
There are many problems in repurposing the parabolic antenna shown in the figure.

That is, this parabolic antenna has a bowl-shaped parabolic reflector 1.
A feeding waveguide 3 made of a rectangular waveguide having a curved end and a connection flange 2 at the other end is integrally provided on the reflecting plate 1, and the feeding waveguide near the focal point of the parabolic reflecting plate 1 is A feed horn 4 is provided at the curved end of the feed horn 3.

In order to use it as television reception equipment, it is necessary to provide it to ordinary households at low cost and in large quantities. However, with this parabolic antenna, it is troublesome to manufacture and fix the feeding waveguide 3, and it is bulky, making it difficult to transport. There are quite a few problems, such as inconvenience.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and provide a simple assembly type parabolic antenna that can be manufactured and transported in large quantities at low cost. a connecting member fixed to the inside of the focal point of the plate; a back-radiating feed horn connected to the outer end of the connecting member and placed at the focal point of the parabolic reflector;
It consists of a flexible waveguide that passes through the parabolic reflector and is connected to the inner end of the connecting member.

The present invention will be explained based on the embodiments shown in FIG. 2 and below.

In the drawings, reference numeral 1a denotes a parabolic reflector plate provided with a through hole 5, and is fixed to a pole 7 or the like by a support fitting 6 attached to the back surface of the parabolic reflector plate.

Several supports 8 are extended from the periphery of the reflector 1a, and inside the focal point of the reflector 1a, a tightening type coupling tube 9, which is a connecting member, is connected with its central axis aligned with the center of the reflector 1a. It is designed to be held facing the camera.

A back radiation type feed horn 10 is attached to the outer end of the coupling tube 9, and its position is approximately near the focal point of the reflecting plate 1a.

Further, a flexible waveguide 11 for microwave transmission is connected to the inner end of the coupling tube 9, which is drawn into the inner surface of the reflector plate 1a from the back side through the through hole 5.

The flexible waveguide 11 is fixed to the pole 7 with a fastening fitting 12 on the back side of the reflection plate 1a, and is extended as it is to the receiver.

Therefore, the microwaves incident on the parabolic reflector 1a are focused near the focal point, enter the back-emitting feed horn 10, and are fed to each receiver via the flexible waveguide 11.

The diameter of the reflecting plate 1a is about 30 cm, 40 cm, or 60 cm, and the flexible waveguide 11 has an inner diameter of, for example, 10 x 20 cm.
A bellows-shaped elliptical waveguide with a diameter of about mm is used.

All other members are separate and independent parts, and can be assembled very easily on site using screws or the like.

In the embodiment, the coupling tube 9 is an independent article, but it is integrated with the attachment part of the feed horn 10 or the tip of the flexible waveguide 11, and the coupling tube 9 is integrated with the attachment part of the feed horn 10 or the tip of the flexible waveguide 11. It may be possible to connect ten attachment parts.

The support body 8 may also be foldably attached to the reflection plate 1a instead of being an independent component.

As explained above, the assembly type simple parabolic antenna according to the present invention is easy to manufacture because it does not use a feeding waveguide with a complicated structure, and since it is an assembly type, it is convenient to transport. It can be provided to households in large quantities at low cost.

Furthermore, since we used a back-radiating type feed horn, the waveguide connection is on the side facing the reflection plate of the connection member, and the waveguide can be passed through the reflection plate relatively straight without bending, so there is no force on the waveguide. There is no stress applied to the waveguide, which will not damage the waveguide or impair its electrical properties, and the waveguide passes straight through the reflector without crossing the front surface of the reflector, reducing radio wave interference. There is no risk of it happening.

[Brief explanation of the drawing]

Figure 1 is a structural diagram showing a conventional parabolic antenna;
FIG. 3 shows an embodiment of the assembled simple parabolic antenna according to the present invention, FIG. 2 is a structural diagram thereof, and FIG. 3 is a partially enlarged sectional view. Symbol 1a is a parabolic reflector, 5 is a through hole, 6 is a support metal fitting, 8 is a support body, 9 is an example of a coupling pipe connection member, 1
0 is a back-radiating feed horn, and 11 is a flexible waveguide.

Claims (1)

[Scope of utility model registration request] a parabolic reflector; a connecting member fixed to the inner side of the focal point of the parabolic reflector via a support; and a back-radiating feed horn connected to the outer end of the connecting member and placed at the focal point of the parabolic reflector. and a flexible waveguide that passes through a parabolic reflector and is connected to the inner end of a connecting member.