JPH0195816U

JPH0195816U -

Info

Publication number: JPH0195816U
Application number: JP19224687U
Authority: JP
Priority date: 1987-12-18
Filing date: 1987-12-18
Publication date: 1989-06-26

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示した断面図、
第２図は入力側λ／４変成器を示したもので、同
図ａはその側面図、同図ｂは背面図、第３図はセ
ラミツク柱状体を示したもので、同図ａはその側
面図、同図ｂは正面図、第４図は出力側λ／４変
成器を示したもので、同図ａはその側面図、同図
ｂは背面図である。図中、２は導波管、３は入力側λ／４変成器、
４はセラミツク柱状体、４ａは円偏波発生用誘電
体、５は出力側λ／４変成器、５ａは交差偏波吸
収用抵抗膜である。 FIG. 1 is a sectional view showing an embodiment of this invention.
Figure 2 shows the input side λ/4 transformer; Figure a shows its side view, Figure b shows its back view, Figure 3 shows the ceramic columnar body, and Figure a shows its side view. FIG. 4 shows the output side λ/4 transformer, FIG. 4A shows the side view, and FIG. 4B shows the rear view. In the figure, 2 is a waveguide, 3 is an input side λ/4 transformer,
4 is a ceramic columnar body, 4a is a dielectric for generating circularly polarized waves, 5 is an output-side λ/4 transformer, and 5a is a resistive film for absorbing cross-polarized waves.

Claims

[Claims for Utility Model Registration] (1) In a feedphone that converts circularly polarized waves transmitted from a satellite broadcasting station into linearly polarized waves, an input side λ made of ceramic as an input matching means is installed in a waveguide with a circular cross section. /4 transformer, a ceramic columnar body with a circularly polarized wave generating dielectric sandwiched in the center, and a ceramic columnar body with a cross polarized wave absorbing resistive film sandwiched in the center. A feedphone characterized by being equipped with four transformers. (2) The feedphone according to claim 1, wherein the dielectric for generating circularly polarized waves and the resistive film for absorbing cross-polarized waves are tilted at 45 degrees relative to each other.