JPS60103920U

JPS60103920U - antenna device

Info

Publication number: JPS60103920U
Application number: JP19659183U
Authority: JP
Inventors: 増田　剛徳
Original assignee: 三菱電機株式会社
Priority date: 1983-12-19
Filing date: 1983-12-19
Publication date: 1985-07-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のアンテナ装置を示す側面図、第２図は従
来の装置を説明するためのアンテナ装置の側面図、第３
図はホーンの指向特性を示す図、第４図はアンテナ装置
の広角度指向特性を示す図、第５図ａ、ｂはそれぞれ従
来のアンテナ装置を示す側面図及び正面図、第６図ａ、
　ｂはそれぞれこの考案の一実施例によるアンテナ装置
の側面図及び正面図、第７図、第８図はこの考案の他の
実施例を示す図である。１・・・主反射鏡、２・・・ホーン、５２・・・遮へい
板、５２ａ・・・電波吸収体、５２ｂ・・・スカート状
の板。なお図中同一符号は同−又は相当部分を示す。３０１．８Ｌ！□θ：角度（船（ＣＩ）　　　（３（ｂ）−１゜第６図FIG. 1 is a side view showing a conventional antenna device, FIG. 2 is a side view of the antenna device for explaining the conventional device, and FIG.
Figure 4 shows the directional characteristics of the horn, Figure 4 shows the wide-angle directional characteristics of the antenna device, Figures 5a and b are side and front views of the conventional antenna device, respectively, and Figure 6a,
b is a side view and a front view of an antenna device according to one embodiment of this invention, respectively, and FIGS. 7 and 8 are views showing other embodiments of this invention. DESCRIPTION OF SYMBOLS 1... Main reflecting mirror, 2... Horn, 52... Shielding plate, 52a... Radio wave absorber, 52b... Skirt-shaped plate. Note that the same reference numerals in the figures indicate the same or equivalent parts. 301. 8L! □θ: Angle (ship (CI)) (3(b)-1° Figure 6

Claims

[Scope of utility model registration request]

(1) A main reflector that reflects radio waves, a horn that is placed near the focal point of the main reflector's curved surface and radiates radio waves to the main reflector, and a radio wave axis that is arranged so that the horn is located at the center of its internal space. 1. An antenna device comprising: a cylindrical shielding plate disposed so as to be parallel to the cylindrical shielding plate;

(2) The antenna device according to claim 1, wherein the cylindrical shielding plate is formed of any curved surface including a flat surface.

(3) The antenna device according to claim 1 or 2, wherein the cylindrical shielding plate has a radio wave absorber attached to its inner wall surface.

(4) The cylindrical shielding plate is characterized in that a skirt-shaped plate is attached to the peripheral edge thereof on the side of the main reflecting mirror. Antenna device described in.