JPS59125124U

JPS59125124U - Microwave band variable attenuator

Info

Publication number: JPS59125124U
Application number: JP1914083U
Authority: JP
Inventors: 啓三鈴木; 誠川合; 江上　俊一郎
Original assignee: 日本電信電話株式会社
Priority date: 1983-02-14
Filing date: 1983-02-14
Publication date: 1984-08-23

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図は従来の可変減衰器の構成例、第２図は本考案の
実施例で、図ａは基本構成を示し、図すは基本構成回路
を主伝送線路に並列に数段接続した例を示す。第３図は
、一定の周波数において、ＰＩＮダイオードのバイアス
電流を変化させた場合の減衰量の変化をグラフにした図
である。図中、実線曲線が本考案の実施例のデータであ
り、点線が従来の可変減衰器のデータである。第４図は
、ＰＩＮダイオードのバイアス電流を一定にしておいて
、周波数を変化させた場合の減衰量の変化をグラフ化し
た図である。図ａは従来の可変減衰器のデータであり、
図すが本考案の実施例のデータである。１・・・主伝送線路、２・・・インピーダンス可変素子
、３・・・接地点、４・・・直列共振回路。Figure 1 shows an example of the configuration of a conventional variable attenuator, Figure 2 shows an embodiment of the present invention, Figure a shows the basic configuration, and the figure shows an example in which the basic configuration circuit is connected in several stages in parallel to the main transmission line. shows. FIG. 3 is a graph showing changes in attenuation when the bias current of the PIN diode is changed at a constant frequency. In the figure, the solid line curve is the data of the embodiment of the present invention, and the dotted line is the data of the conventional variable attenuator. FIG. 4 is a graph showing changes in attenuation when the bias current of the PIN diode is kept constant and the frequency is changed. Figure a shows data for a conventional variable attenuator,
The figure shows data of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Main transmission line, 2... Variable impedance element, 3... Grounding point, 4... Series resonant circuit.

Claims

[Scope of utility model registration request]

In a microwave band variable attenuator that uses a variable impedance element to vary the amount of attenuation by changing the amount of signal on the main transmission line flowing into the ground side, there is a gap between the variable impedance element and the ground point. A microwave band variable attenuator characterized by having a series resonant circuit.