JPS5896349U

JPS5896349U - microwave equipment

Info

Publication number: JPS5896349U
Application number: JP1981191910U
Authority: JP
Inventors: 羽川　潔
Original assignee: ティーディーケイ株式会社
Priority date: 1981-12-23
Filing date: 1981-12-23
Publication date: 1983-06-30

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図は従来の自動車用電話システムを示す説
明図、第２図はアイソレータの原理を示す説明図、第３
図はこの考案による一実施例を示す自動車用電話機の構
成図、第４図ないし第５図はこの考案による誘電体フィ
ルタとアイソレータの接続を示す説明図、第６図はこの
考案による誘電体フィルタの説明図である。１・・・アイソレータ、２ａ、２ｂ、２ｃ・・・端子、
３・・・ダミー負荷抵抗、４・・・アンテナ、５・・・
誘電体フィルタ、６・・・受信機、７・・・送信機、８
・・・金属ケース。゛ Figure 1 is an explanatory diagram showing a conventional car telephone system, Figure 2 is an explanatory diagram showing the principle of an isolator, and Figure 3 is an explanatory diagram showing the principle of an isolator.
Figure 4 is a block diagram of a car phone according to an embodiment of this invention, Figures 4 and 5 are explanatory diagrams showing the connection between a dielectric filter and an isolator according to this invention, and Figure 6 is a dielectric filter according to this invention. FIG. 1... Isolator, 2a, 2b, 2c... Terminal,
3...Dummy load resistance, 4...Antenna, 5...
Dielectric filter, 6... Receiver, 7... Transmitter, 8
...Metal case.

Claims

[Scope of utility model registration request]

A dielectric filter comprising an antenna terminal, a transmitter terminal, and a receiver terminal on the outer surface of a metal case, and housing a transmitter filter and a receiver filter comprising a duplexer and a dielectric resonator, A microphone white wave device characterized in that an isolator is incorporated between the receiver side of the dielectric filter and the antenna.