JPS5735436A - Alarm circuit for antenna failure - Google Patents

Alarm circuit for antenna failure

Info

Publication number
JPS5735436A
JPS5735436A JP11196680A JP11196680A JPS5735436A JP S5735436 A JPS5735436 A JP S5735436A JP 11196680 A JP11196680 A JP 11196680A JP 11196680 A JP11196680 A JP 11196680A JP S5735436 A JPS5735436 A JP S5735436A
Authority
JP
Japan
Prior art keywords
antenna
output
circuit
alarm circuit
directional coupler
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
JP11196680A
Other languages
Japanese (ja)
Inventor
Masahiro Ichieda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11196680A priority Critical patent/JPS5735436A/en
Publication of JPS5735436A publication Critical patent/JPS5735436A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/103—Reflected power, e.g. return loss

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To detect failures of antennas during the operation of radar, by making self-check of an alarm circuit through the detected output of a reflection power of a transmission signal for the purpose of the detection of antenna failure. CONSTITUTION:A transmitted power outputted from a transmitter 4 is applied to an antenna 1 via a transmission/reception switch 3 and a directional coupler 2. The reflection power from the antenna 1 is applied to a wave detector 6 via a wave detector protecting circuit 12 consisting of the directional coupler 2 and an attenuator or a limiter. The output of the detector 7 is applied to a control circuit 11, where failures of the antenna can be discriminated by the output. Thus, since the transmission signal is used, microwave parts are less in number and the cost is low. Since no parts for switching circuit, etc. is required for reception systems 5, 8, the noise index of the reception system can be increased.
JP11196680A 1980-08-11 1980-08-11 Alarm circuit for antenna failure Pending JPS5735436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11196680A JPS5735436A (en) 1980-08-11 1980-08-11 Alarm circuit for antenna failure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11196680A JPS5735436A (en) 1980-08-11 1980-08-11 Alarm circuit for antenna failure

Publications (1)

Publication Number Publication Date
JPS5735436A true JPS5735436A (en) 1982-02-26

Family

ID=14574598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11196680A Pending JPS5735436A (en) 1980-08-11 1980-08-11 Alarm circuit for antenna failure

Country Status (1)

Country Link
JP (1) JPS5735436A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0345023A (en) * 1989-07-13 1991-02-26 Nec Corp High frequency changeover circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0345023A (en) * 1989-07-13 1991-02-26 Nec Corp High frequency changeover circuit

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