JPH01126642U - - Google Patents

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Publication number
JPH01126642U
JPH01126642U JP1511188U JP1511188U JPH01126642U JP H01126642 U JPH01126642 U JP H01126642U JP 1511188 U JP1511188 U JP 1511188U JP 1511188 U JP1511188 U JP 1511188U JP H01126642 U JPH01126642 U JP H01126642U
Authority
JP
Japan
Prior art keywords
signal
radio wave
wave detection
detection device
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1511188U
Other languages
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1511188U priority Critical patent/JPH01126642U/ja
Publication of JPH01126642U publication Critical patent/JPH01126642U/ja
Pending legal-status Critical Current

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  • Superheterodyne Receivers (AREA)

Description

【図面の簡単な説明】
第１図は本考案の原理図、第２図は本考案の実
施例の回路図、第３図は従来の技術による電波検
知装置の一例を表わす図。 図において、１１……局部発振器、１２……混
合回路、１３……帯域通過フイルタ。

Claims (1)

  1. 【実用新案登録請求の範囲】 １ アンテナから受信した搬送波の周波数がそれ
    ぞれｆ１およびｆ２である第１および第２の電波
    のいずれかを検知して検知信号を出力する電波検
    知装置であつて、 該周波数ｆ１およびｆ２の算術平均値ｆ１＋ｆ
    ２２の周波数の信号を発生する局部発振器１１と
    、 該局部発振器１１の出力と前記アンテナからの
    受信信号を混合してｆ１およびｆ２の差の１／２
    の値の絶対値｜ｆ１−ｆ２２｜の周波数の信号を
    含む信号を出力する混合回路１２と、 該混合回路１２の出力信号を入力とし周波数｜
    ｆ１−ｆ２２｜の信号を選択的に通過させて電波
    検知のための中間周波信号とする帯域通過フイル
    タ１３を具備する電波検知装置。 ２ 前記中間周波信号を検波回路で検波した後の
    信号から変調信号を検出する変調信号検出回路を
    具備する請求項１記載の電波検知装置。
JP1511188U 1988-02-09 1988-02-09 Pending JPH01126642U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1511188U JPH01126642U (ja) 1988-02-09 1988-02-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1511188U JPH01126642U (ja) 1988-02-09 1988-02-09

Publications (1)

Publication Number Publication Date
JPH01126642U true JPH01126642U (ja) 1989-08-30

Family

ID=31226881

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1511188U Pending JPH01126642U (ja) 1988-02-09 1988-02-09

Country Status (1)

Country Link
JP (1) JPH01126642U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03263932A (ja) * 1990-03-14 1991-11-25 Matsushita Electric Ind Co Ltd コヒーレント光伝送装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642437A (en) * 1979-09-14 1981-04-20 Matsushita Electric Works Ltd Radio receiver
JPS58187873A (ja) * 1982-04-27 1983-11-02 Nec Corp 搬送波対雑音検出器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642437A (en) * 1979-09-14 1981-04-20 Matsushita Electric Works Ltd Radio receiver
JPS58187873A (ja) * 1982-04-27 1983-11-02 Nec Corp 搬送波対雑音検出器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03263932A (ja) * 1990-03-14 1991-11-25 Matsushita Electric Ind Co Ltd コヒーレント光伝送装置

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