JPS58170103A - Production of parabola antenna - Google Patents

Abstract

PURPOSE:To produce a parabola antenna with simple equipment of production, high productivity and a low cost, by holding a metallic foil between synthetic resin plates. CONSTITUTION:A desired hole 6 is drilled at the center of a flat metallic foil 5 of aluminum, etc. which is cut in a necessary size. The foil 5 is held between two sheets of synthetic resin plates 7 made of FRP, AAS or acrylic resin, etc. which have slightly larger outer diameter than the foil 5. These two plates 7 are adhered with an adhesive or melt-stuck to each other in such a way that the foil 5 is not exposed to the outside. Then this unified foil 5 and plates 7 are formed into a parabolic form by the vacuum forming or press forming, etc. Thus a reflecting plate is obtained for a parabola antenna.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a parabolic antenna, particularly a reflector plate, which can be used for receiving signals in the extremely high frequency band (SHF band), and which can be manufactured with high productivity, low cost, and long life. A method for manufacturing a parabolic antenna is provided.

Parabolic antennas have been used as means for receiving television broadcasts using SHF band broadcasting satellites, which have recently been put into practical use. As shown in FIG. 1, this antenna has a parabolic reflector 3- and a radiator 4 attached to the tip of an antenna pole 1 via a rotating mechanism 2.

In addition, since the laboratory antenna is installed outdoors, the reflector plate 3 is often exposed to wind or snow (1), so its strength must be sufficiently large. For this reason, conventionally, the reflector 3 was made of aluminum or the like.
- A metal plate was drawn into a parabolic shape, and the surface was plated to prevent rust.9 The surface was coated with a protective coating, but doing so required many manufacturing steps and production This method has disadvantages in that it has poor performance and requires a special process, resulting in high costs. Furthermore, the anti-corrosion finish and coating on the surface tend to peel off easily, resulting in a short lifespan.

Therefore, it is an object of the present invention to provide a method for manufacturing a parabolic antenna that can eliminate all of the conventional drawbacks, can be manufactured at low cost with good productivity, and has a long service life. It is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to drawings showing an example of the manufacturing method.

In the present invention, as shown in FIG. 2, a flat metal foil 5 such as aluminum foil cut to a required size is prepared, and a necessary hole 6 is provided in the center of the metal foil 5. On the other hand, two synthetic resin plates 7 made of FRP resin, Mumu S resin, acrylic resin, etc., each having a slightly larger outer diameter are prepared, and a metal foil 5 is sandwiched between the two synthetic resin plates 7. FIG. 3 shows that the two synthetic resin plates 7 are bonded together with an adhesive, welded, fused, etc. so that the metal foil 6 is not exposed to the outside.

Integrate as shown in Figure 4. Thereafter, this integrated whole is bent into a parabolic shape as shown in FIG. 6 by vacuum forming or press forming to complete the reflecting plate 3 for a parabolic antenna. Note that a through hole 8 for attaching the radiator 4 may be provided at the same time.

When the reflector plate 3 thus produced is assembled and used as shown in FIG.
It becomes an object-like radio wave reflecting surface and can be used as a parabolic antenna.

Specifically, the metal foil 6 has a thickness of 10 μm and a diameter of 303 mm.
Two sheets of aluminum foil with a thickness of 1 to 1.6 mm are used.
When it was sandwiched between synthetic resin plates 7 made of RP, it was possible to obtain a parabolic reflector 3 with a good shape.

Moreover, with this configuration, it is possible to obtain a reflecting plate 3 with sufficient strength against wind, snow, etc., and since the metal foil 6 is sandwiched between the synthetic resin plates 70, it is possible to obtain a reflecting plate 3 that is strong enough to withstand wind, snow, etc. There is no need for metal plate drawing, anti-rust processing, painting, etc., and it can be easily manufactured with high productivity and at low cost using simple manufacturing equipment. Further, even if the metal foil 6 is hit by another object from the outside, since it is sandwiched between the synthetic resin plates 7, it is less likely to be deformed and has a long life.

As described above, according to the present invention, it is possible to manufacture a parabolic antenna for receiving HF band television broadcasting, etc. with good productivity at low cost, and also with a long life. be.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example of a parabolic antenna, FIGS. 2 and 3 are a side view of a parabolic antenna, FIG. They are an exploded perspective view, a plan view, and a sectional front view. 3...Reflector plate, 6...Metal foil, 7...
...Synthetic resin board. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure II 3 Figure 4

Claims (1)

[Claims] A metal foil is sandwiched between two synthetic resin plates, the synthetic resin plates are sealed so that the metal foil is not exposed to the outside, and the whole is bent into a parabolic shape to form a reflector for a parabolic antenna. A method for manufacturing a parabolic antenna characterized by the following.