JPH01129901U

JPH01129901U -

Info

Publication number: JPH01129901U
Application number: JP2442488U
Authority: JP
Priority date: 1988-02-24
Filing date: 1988-02-24
Publication date: 1989-09-05

Description

[Brief explanation of drawings]

第１図は本考案による一実施例の斜視図、第２
図は第１図の板状低損失誘電体の斜視図、第３図
は本考案による周波数特性図、第４図は第１図の
板状低損失誘電体の他の実施例の斜視図、第５図
は従来技術による斜視図、第６図は従来技術によ
る他の側断面図である。図において、１は導波管フイルタ、２は導波管
、２ａは長辺側壁、２ｂは短辺側壁、３はポスト
、４は微調整用金属製ねじ、５，５―１は板状低
損失誘電体、５―１ａは切欠きをそれぞれ示す。 Fig. 1 is a perspective view of one embodiment of the present invention;
The figures are a perspective view of the plate-shaped low-loss dielectric shown in Fig. 1, Fig. 3 is a frequency characteristic diagram according to the present invention, and Fig. 4 is a perspective view of another embodiment of the plate-shaped low-loss dielectric shown in Fig. 1. FIG. 5 is a perspective view of the prior art, and FIG. 6 is another side sectional view of the prior art. In the figure, 1 is a waveguide filter, 2 is a waveguide, 2a is a long side wall, 2b is a short side wall, 3 is a post, 4 is a metal screw for fine adjustment, 5, 5-1 is a plate-shaped lower In the loss dielectric material, 5-1a indicates a notch.

Claims

[Scope of utility model registration request]

A plurality of posts 3 parallel to the electric field are provided vertically on the inner surface of the long side wall 2a of the waveguide 2, and a plate-shaped low-loss dielectric 5 for coarsely adjusting the center frequency in the tube axis direction is inserted and fixed along the posts 3. A waveguide filter further comprising a metal screw 4 for fine adjustment parallel to the electric field, the insertion length of which can be adjusted between the posts 3.