JPH0641364Y2 - Parabolic antenna feed horn cover - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a parabolic antenna for receiving aerial radio waves, and more particularly to a cover for protecting the feed horn of the parabolic antenna from rain, snow, birds and the like. .

[Conventional technology]

With the commercialization of communication satellite broadcasting, various small parabolic antennas have been provided together with a receiver for receiving this broadcasting. Such a parabolic antenna is installed in the direction of the geostationary communication satellite, for example, in the Tokyo area, the reflector is installed at an angle of 38 ° to receive the radio wave from the communication satellite, and the radio wave reflected by this reflector is opened slightly upward. The high frequency of 12 GHz received by the receiving converter via the feed horn arranged so that the section is located is converted into the UHF band and sent to the receiver.

Since the opening of the feed horn is directed upward as described above, rain, snow or the like is likely to enter through the opening, and the reception sensitivity of the feed horn is deteriorated due to the penetration of these. Therefore, conventionally, a cap made of a synthetic resin such as polystyrene or polyester having a small high-frequency loss is fitted into this opening to prevent rain or the like from entering the feed horn.

[Problems to be solved by the device]

However, the radio waves from the communication satellites are weak, and if raindrops adhere to the cap of the feed horn or if snow accumulates, the reception sensitivity will decrease. In addition, birds may stop on the feed horn and peck this beak, damaging it.

Therefore, an object of the present invention is to provide a feed horn cover that prevents snow and the like from adhering to the cap of the feed horn, prevents damage by birds and the like, and prevents snow from adhering even in heavy snow regions. is there.

[Means for Solving the Problems]

This invention relates to a feed horn cover of a parabolic antenna having a spherical reflecting mirror and a feed horn composed of a cylindrical portion having an opening formed at its tip so as to receive a radio wave reflected by the reflecting mirror. The feed horn cover is located at the eaves and the end of the eaves to cover the opening of the feed horn, and it is divided into an approximately semicircular shape by the hinge part that is integrally formed, and fits into the cylindrical part of the feed horn. The heater means is embedded in the vicinity of the tip of the eaves portion and in the circumferential direction thereof.

〔Example〕

An embodiment of the present invention shown in the drawings will be described below. Since the entire structure of the parabolic antenna is well known, the drawing and its detailed description are omitted. Although the feed horn 1 has a small opening cone shape as an example, it goes without saying that it may be a small opening pyramid shape. The conical portion 2 of the feed horn 1 is fitted in the opening of the conical portion 2 with a cap 3 made of a synthetic resin such as polystyrene or polyester having a small high frequency loss as in the conventional case. Feed cone 1 cone 2
A cover 4 made of a plate-like body made of synthetic resin such as polystyrene or polyester having a small high frequency loss like the cap 3 is attached to the.

The cover 4 has a substantially semi-conical eaves portion 5 extending so as to cover the conical portion 2 of the feed horn 1, and a support portion 7 fitted to the cylindrical portion 6 of the feed horn 1. There is.
The supporting portion 7 is divided into a substantially semicircular shape by an integrally formed hinge portion 8, and the side opposite to the hinge portion 8 is configured to be fixed with a screw 9. A heater wire 10 is embedded in the tip end portion of the eaves portion 5 in the circumferential direction. The heater wire 10 is connected so as to be powered by a receiver or the like (not shown).

As described above, the cover 4 can be attached to and detached from the feed horn 1 by operating the screw 9, and the eaves 5 can surely cover the cap 3 in a semicircular shape, and rain, snow, etc. adhere to the cap 3. Can be prevented. Since the heater wire 10 is embedded in the eaves portion 5, snow or ice adhering to the eaves portion 5 can be melted, so that the eaves portion 5 can always be received in the best condition even in a snowy area or a cold area. In addition, if the eaves portion 5 is configured to be long to some extent according to the size of the flying birds, the beak does not reach the cap 3 even if not only small birds but also relatively large birds such as birds stop on the eaves portion 5. It is also possible to prevent damage such as damage to the cap 3 by poking it with its beak.

In the above embodiment, the heater means is used as the heater wire 10 and the eaves portion 5 is used.
However, the heater means may be formed by a surface heating element, and the surface heating element may be attached to the back surface of the tip of the eaves portion 5 along the circumferential direction.

[Effect of device]

As described above, the feed horn cover of the parabolic antenna of this invention has a simple structure, but it can reliably prevent rain and snow from adhering to the cap, and snow and ice adhere to the eaves. However, since it can be melted by the heater means, it can always be received in the best condition even in a snowy area or a cold area. Also, it is possible to protect the cap from being damaged by a bird or the like. Further, when the cover is attached to the feed horn, it can be carried out by a simple operation such that the support portion is opened with the hinge portion as a fulcrum and the cylindrical portion of the feed horn is wrapped and fitted.

[Brief description of drawings]

The drawing is a perspective view showing an embodiment of the present invention in a state of being attached to a feed horn. In the drawings, 1 is a feed horn, 2 is a conical part thereof, 3 is a cap, 4 is a cover, 5 is an eaves part, 6 is a cylindrical part, 7 is a supporting part, 8 is a hinge part, 9 is a screw, 10 is a heater. It is a line.

Claims (2)

[Scope of utility model registration request] 1. A feed horn cover for a parabolic antenna having a spherical reflecting mirror and a feed horn constituted by a cylindrical portion having an opening formed at its tip so as to receive an electric wave reflected by the reflecting mirror, The feed horn cover is located at an eaves portion covering the opening portion of the feed horn and an end portion of the eaves portion, and is divided into an approximately semicircular shape by an integrally formed hinge portion. A feed horn cover for a parabolic antenna, comprising: a support portion fitted into the cylindrical portion; and heater means embedded in the vicinity of the tip of the eaves portion and in the circumferential direction thereof. 2. The heater means is composed of a surface heating element attached near the tip of the eaves portion and extending in the circumferential direction thereof. Parabolic antenna feed horn cover.