JPS63106207U

JPS63106207U -

Info

Publication number: JPS63106207U
Application number: JP20067086U
Authority: JP
Priority date: 1986-12-25
Filing date: 1986-12-25
Publication date: 1988-07-09

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す全体図、第
２図は部分図、第３図に遮蔽体の斜視図、第４図
は遮蔽体の展開図、第５図は放射特性図、第６図
と第７図、第８図はこの考案のさらに他の実施例
を示す部分図、第９図は従来のアンテナ装置を示
す全体図、第１０図は部分上面図、第１１図は放
射特性図である。図において、１は主反射鏡、２は副反射鏡、３
は一次放射器、４は電波放射方向、５は架台、６
は調整機構、７は遮蔽体、８と９は錐体、１０は
相貫線、１１は平面、１２と１３は開口、１４は
電波吸収体、１５は中空球冠、１６は誘電体薄膜
である。なお、各図中同一符号は同一または相当
部分を示す。 Fig. 1 is an overall view showing one embodiment of this invention, Fig. 2 is a partial view, Fig. 3 is a perspective view of the shielding body, Fig. 4 is a developed view of the shielding body, and Fig. 5 is a radiation characteristic diagram. 6, 7, and 8 are partial views showing still another embodiment of this invention, FIG. 9 is an overall view showing a conventional antenna device, FIG. 10 is a partial top view, and FIG. 11 is a partial view showing another embodiment of this invention. It is a radiation characteristic diagram. In the figure, 1 is the main reflecting mirror, 2 is the sub-reflecting mirror, and 3 is the main reflecting mirror.
is the primary radiator, 4 is the radio wave emission direction, 5 is the mount, 6
1 is an adjustment mechanism, 7 is a shield, 8 and 9 are cones, 10 is a line of intersection, 11 is a plane, 12 and 13 are openings, 14 is a radio wave absorber, 15 is a hollow spherical crown, and 16 is a dielectric thin film. be. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) A main reflecting mirror of a paraboloid of revolution, a sub-reflecting mirror of a part of an ellipsoid of revolution whose focal point is the focal point of this main reflecting mirror, and the above-mentioned sub-reflecting mirror. In an antenna device equipped with a primary radiator having the other focal point of the reflecting mirror and the radio wave phase center, a conducting wire is arranged around the secondary reflecting mirror with apexes near the respective focal points of the secondary reflecting mirror. The intersection of the intersecting line of these two cones and the periphery of the sub-reflector is the above 2 cones.
A shielding body whose inner surface is an envelope formed by two planes formed by two vertices is installed at the primary radiator without blocking radio waves from the primary radiator to the aperture of the main reflector via the sub-reflector. An antenna device characterized in that it is provided between a radiator and the sub-reflector. (2) Utility model registration claim No. (1) characterized in that a radio wave absorber is attached to the inner surface of the shielding body.
Antenna device as described in section. (3) Utility model registration claim (1) characterized in that the shielding body is equipped with a dielectric hollow spherical crown centered on the focal point of the main reflecting mirror of the sub-reflecting mirror. or the antenna device described in paragraph (2). (4) Claims (1) or (2) of the utility model registration claim characterized in that a dielectric thin film is attached to the main reflecting mirror side of the sub-reflecting mirror of the shielding body, both near the focal point. Antenna device as described in section.