JPS6440901U

JPS6440901U -

Info

Publication number: JPS6440901U
Application number: JP13646887U
Authority: JP
Priority date: 1987-09-07
Filing date: 1987-09-07
Publication date: 1989-03-10

Description

[Brief explanation of drawings]

第１図は本考案に係るフイルタ構造の一実施例
の一部破断斜視図、第２図は第１図のフイルタ構
造の縦断面図、第３図は第１図のフイルタ構造を
有するフイルタのフイルタ特性図、第４図および
第５図は夫々第１図のフイルタ構造の変形例の縦
断面図、第６図および第７図は夫々１／４波長同
軸ＴＥＭ共振器の構造を示す縦断面図および要部
縦断面図、第８図は従来のフイルタ構造の一部破
断斜視図、第９図は第８図のフイルタ構造の縦断
面図である。１１……１／４波長同軸ＴＥＭ共振器、１２…
…端子電極、１３……チツプ状コンデンサ、２１
……金属ケース、２２……入力用同軸コネクタ、
２３……出力用同軸コネクタ、２４……蓋部材、
２５……カツトオフ空間、３１……突出部、３２
……金属板。 FIG. 1 is a partially cutaway perspective view of an embodiment of the filter structure according to the present invention, FIG. 2 is a longitudinal sectional view of the filter structure of FIG. 1, and FIG. 3 is a diagram of a filter having the filter structure of FIG. 1. Filter characteristic diagrams, FIGS. 4 and 5 are longitudinal cross-sectional views of modified examples of the filter structure shown in FIG. 1, and FIGS. 6 and 7 are longitudinal cross-sectional views showing the structure of a 1/4 wavelength coaxial TEM resonator, respectively. 8 is a partially cutaway perspective view of a conventional filter structure, and FIG. 9 is a longitudinal sectional view of the filter structure shown in FIG. 8. 11...1/4 wavelength coaxial TEM resonator, 12...
...Terminal electrode, 13... Chip-shaped capacitor, 21
...Metal case, 22...Coaxial connector for input,
23... Output coaxial connector, 24... Lid member,
25...Cut-off space, 31...Protrusion, 32
...Metal plate.

Claims

[Scope of Claim for Utility Model Registration] A dielectric coaxial resonator in which an inner conductor and an outer conductor are formed on the inner and outer circumferential surfaces of a cylindrical dielectric body having a through hole in its axial center, respectively, is housed in a metal case. A coupling member inserted into the through hole of the dielectric of the dielectric coaxial resonator and protruding toward the open end is connected between the input terminal and output terminal attached to the metal case. In a filter that is connected to a transmission path and has a cut-off space including the signal transmission path formed on the open end side of a dielectric coaxial resonator in the metal case, the inner wall of the cut-off space forming portion of the metal case is A filter structure characterized by protruding into the cut-off space.