JPS611902U

JPS611902U - dielectric coaxial filter

Info

Publication number: JPS611902U
Application number: JP8713984U
Authority: JP
Inventors: 貞夫山下
Original assignee: 株式会社村田製作所
Priority date: 1984-06-11
Filing date: 1984-06-11
Publication date: 1986-01-08

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 drawings]

第１図および第２図は、それぞれ、この考案の一実施例
の特徴となる構成を示す斜視図である。第３図は、従来の誘電体同軸フィルタの一例を示す平面
図である。第４図は、同軸共振器の側断面図である。第５図は、従来の誘電体同軸フィルタの等価回路図であ
る。第６図は、同軸共振器の共振時の定在波分布等を示す図
である。第７図はミ従来の誘電体同軸フィルタの周波数特性を示
す図である。第８図は、この考案の一実施例の等価回路図である。第９図は、一実施例の周波数特性を示す図である。第１０図は、この考案の一実施例に用いられる接続金具
を示す斜視図である。図において、２は誘電体板、３は同軸共振器、４はコン
デンサ電極、７は接続金具、１１はインダクタンス電極
、１２はコイルを示す。FIGS. 1 and 2 are perspective views showing the characteristic configuration of an embodiment of this invention, respectively. FIG. 3 is a plan view showing an example of a conventional dielectric coaxial filter. FIG. 4 is a side sectional view of the coaxial resonator. FIG. 5 is an equivalent circuit diagram of a conventional dielectric coaxial filter. FIG. 6 is a diagram showing the standing wave distribution etc. during resonance of the coaxial resonator. FIG. 7 is a diagram showing the frequency characteristics of a conventional dielectric coaxial filter. FIG. 8 is an equivalent circuit diagram of an embodiment of this invention. FIG. 9 is a diagram showing frequency characteristics of one embodiment. FIG. 10 is a perspective view showing a connecting fitting used in an embodiment of this invention. In the figure, 2 is a dielectric plate, 3 is a coaxial resonator, 4 is a capacitor electrode, 7 is a connecting fitting, 11 is an inductance electrode, and 12 is a coil.

Claims

[Scope of utility model registration request]

(1) Equipped with a quarter-wavelength coaxial resonator and a dielectric plate on which a capacitor electrode is formed between input and output terminals, the inner conductor of the coaxial resonator and the capacitor electrode are electrically connected. The dielectric coaxial filter is characterized in that an inductance component is inserted into the connection between the inner conductor and the capacitor electrode for shifting spurious generated by a third harmonic of a frequency three times the fundamental resonance wave. , dielectric coaxial filter.

(2) The dielectric coaxial filter according to claim 1, wherein the inductance component has a size that satisfies the following equation. 3jt=2c], where f1=fundamental resonance frequency C=stray capacitance L generated between the capacitor electrode and earth potential=size of the inductance component to be inserted.