JPH0298509U

JPH0298509U -

Info

Publication number: JPH0298509U
Application number: JP7680488U
Authority: JP
Priority date: 1988-06-09
Filing date: 1988-06-09
Publication date: 1990-08-06

Description

[Brief explanation of the drawing]

第１，２図は本考案の第１実施例としての拡縮
型アンテナ装置を示すもので、第１図はそのパラ
ボラ面拡張状態を示す斜視図、第２図はその折り
たたみ状態を示す斜視図であり、第３図は本考案
の第２実施例としての拡縮型アンテナ装置を示す
斜視図であり、第４図は本考案の第３実施例とし
ての拡縮型アンテナ装置を示す斜視図であり、第
５図は本考案の第４実施例としての拡縮型アンテ
ナ装置を示す斜視図であり、第６図は本考案の第
５実施例としての拡縮型アンテナ装置を示す斜視
図であり、第７図は従来のパラボラ型アンテナを
示す斜視図である。１……中空部材、２……反射部、２′ａ……放
物面主反射鏡、２′ｂ……楕円面副反射鏡、２′
ｃ……双曲面副反射鏡、２ａ，２ｂ……膜面、３
……放射器、４……ポール、４ａ……三脚、４ｂ
……フレキシブルポール、５……コンバータ、６
……アーム、８……給電ケーブル、９……副反射
鏡固定部材、１０……給排気口。 Figures 1 and 2 show an expandable and retractable antenna device as a first embodiment of the present invention. Figure 1 is a perspective view showing the parabolic expanded state, and Figure 2 is a perspective view showing the folded state. 3 is a perspective view showing an expandable antenna device as a second embodiment of the present invention, and FIG. 4 is a perspective view showing an expandable antenna device as a third embodiment of the present invention, FIG. 5 is a perspective view showing an expandable antenna device as a fourth embodiment of the present invention, FIG. 6 is a perspective view showing an expandable antenna device as a fifth embodiment of the present invention, and FIG. The figure is a perspective view showing a conventional parabolic antenna. DESCRIPTION OF SYMBOLS 1... Hollow member, 2... Reflection part, 2'a... Parabolic main reflecting mirror, 2'b... Ellipsoidal sub-reflecting mirror, 2'
c... Hyperboloid sub-reflector, 2a, 2b... Film surface, 3
...Radiator, 4...Pole, 4a...Tripod, 4b
...Flexible pole, 5...Converter, 6
... Arm, 8 ... Power supply cable, 9 ... Sub-reflector fixing member, 10 ... Supply and exhaust port.

Claims

[Claims for Utility Model Registration] (1) A hollow member comprising a reflecting portion that forms a parabolic surface and a radiator that is placed at the focal point of the reflecting portion, the reflecting portion being able to expand and contract by supplying and discharging gas. The hollow member is provided on the film surface of the member, and the hollow member is formed so that the reflecting portion can be expanded into a parabolic shape by supplying gas into the member, and the reflector is provided on the reflecting portion in the parabolic shape. 1. An expandable and retractable antenna device, characterized in that the antenna device is arranged so as to be placed at the focal point of the antenna, and is further provided with an air supply/exhaust port for supplying and discharging gas. (2) Claim (1) characterized by comprising a pedestal for supporting the radiator, and the pedestal is formed to be able to adjust the height, vertical angle, and direction of the radiator.
The expandable antenna device described in .