JPH0443009U

JPH0443009U -

Info

Publication number: JPH0443009U
Application number: JP8321390U
Authority: JP
Priority date: 1990-08-06
Filing date: 1990-08-06
Publication date: 1992-04-13

Description

[Brief explanation of the drawing]

第１〜８図は本考案の第１実施例としての面状
レンズアンテナを示すもので、第１図はその概略
図、第２図は回折リングの設計例の正面図、第３
図は回折リングがフレームに取付けられた場合の
正面図、第４ａ図は第３図のａ−ａ矢視断面
図、第４ｂ図、第４ｃ図および第４ｄ図はいずれ
も変形例の場合における第４ａ図と同様の断面図
、第５図はその正面図、第６図および第７図はい
ずれもその実施説明図、第８ａ図および第８ｂ図
はいずれも第１実施例の変形例を示す回折リング
の中央縦断面図であり、第９ａ図、第９ｂ図およ
び第１０図は本考案の第２実施例を示すもので、
第９ａ図はフレネルレンズの１例の中央縦断面図
、第９ｂ図は同中央横断面図、第１０図は変形例
としてのフレネルレンズにゾーニングを施した場
合の中央縦（横）断面図であり、第１１図および
第１２図はいずれも回折リングの形状を導く数式
の説明図であり、第１３図、第１４図および第１
５図はいずれもフレネルレンズの形状を導く数式
の説明図であり、第１６図は従来の拡縮型パラボ
ラアンテナの斜視図である。１……回折リング、２……金属箔、３……膜面
、４……フレーム、５……受信用ピツクアツプア
ンテナ部、６……一次放射器、７……ＢＳコンバ
ータ、８……アーム、９……取付け金具、１０…
…スタンド、１１……衛星、１２……誘電体、１
３……フレネルレンズ。 1 to 8 show a planar lens antenna as a first embodiment of the present invention, FIG. 1 is a schematic diagram thereof, FIG. 2 is a front view of a design example of a diffraction ring, and FIG.
The figure is a front view when the diffraction ring is attached to the frame, Figure 4a is a sectional view taken along the a-a arrow in Figure 3, and Figures 4b, 4c, and 4d are all modified examples. 4a is a sectional view similar to FIG. Fig. 9a, Fig. 9b and Fig. 10 show a second embodiment of the present invention;
Figure 9a is a central vertical cross-sectional view of an example of a Fresnel lens, Figure 9b is a central cross-sectional view of the same, and Figure 10 is a central vertical (horizontal) cross-sectional view of a modified Fresnel lens when zoning is applied. 11 and 12 are explanatory diagrams of mathematical formulas that lead to the shape of the diffraction ring, and FIGS. 13, 14, and 1
5 are explanatory diagrams of mathematical formulas for deriving the shape of a Fresnel lens, and FIG. 16 is a perspective view of a conventional expandable and retractable parabolic antenna. DESCRIPTION OF SYMBOLS 1... Diffraction ring, 2... Metal foil, 3... Film surface, 4... Frame, 5... Receiving pick-up antenna section, 6... Primary radiator, 7... BS converter, 8... Arm, 9...Mounting bracket, 10...
...Stand, 11...Satellite, 12...Dielectric, 1
3...Fresnel lens.

Claims

[Scope of utility model registration request]

A metal or dielectric lens configured on a surface such as a thin plate or film surface that can transmit radio waves;
It has a frame for holding the lens, an arm attached to the frame, and a receiving pick-up antenna section disposed on the arm at the focal point position of the lens. A planar lens antenna characterized by being attached to a frame so that its mounting angle can be changed.