JPS55103483A - Radio wave detector - Google Patents

Radio wave detector

Info

Publication number
JPS55103483A
JPS55103483A JP968079A JP968079A JPS55103483A JP S55103483 A JPS55103483 A JP S55103483A JP 968079 A JP968079 A JP 968079A JP 968079 A JP968079 A JP 968079A JP S55103483 A JPS55103483 A JP S55103483A
Authority
JP
Japan
Prior art keywords
signal
frequency
modulation
detection
detector
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
JP968079A
Other languages
Japanese (ja)
Inventor
Takanori Kimura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP968079A priority Critical patent/JPS55103483A/en
Publication of JPS55103483A publication Critical patent/JPS55103483A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To increase greatly the sensing distance with the high sensitivity by modulating the local oscillation frequency and the detection frequency with the signal corresponding to the detection output signal and at the same time applying the reception heterodyne system. CONSTITUTION:The signal received at antenna 1 is supplied to frequency mixer 7, and the differential or sum frequency signal to the modulation signal sent from modulator 8 is led out to be supplied to low-frequency amplifier 9. Amplifier 9 amplifies mainly the differential frequency signal sent from mixer 7 and then supplies the amplified signal to LPF10. LPF10 gives the selective passing to the differential frequency signal and then supplies the signal to detector 2. Detector 2 performs the envelope curve detection to extract the amplitude information of the input signal and then drives speaker 5 and others. On the other hand, modulator 8 receives the high-frequency signal from local oscillator 11 and gives the modulation by the rectangular wave modulation signal given from modulation signal generator 12. This modulation signal undergoes the mixture through mixer 7, and the detection signal of detector 2 is turned into the detection output signal corresponding to the modulation signal. Thus no output of LPF10 is extracted when no external signal is supplied, and accordingly speaker 5 and others are not driven.
JP968079A 1979-02-01 1979-02-01 Radio wave detector Pending JPS55103483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP968079A JPS55103483A (en) 1979-02-01 1979-02-01 Radio wave detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP968079A JPS55103483A (en) 1979-02-01 1979-02-01 Radio wave detector

Publications (1)

Publication Number Publication Date
JPS55103483A true JPS55103483A (en) 1980-08-07

Family

ID=11726913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP968079A Pending JPS55103483A (en) 1979-02-01 1979-02-01 Radio wave detector

Country Status (1)

Country Link
JP (1) JPS55103483A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514269B1 (en) * 1970-10-13 1976-02-10
JPS5295994A (en) * 1976-02-06 1977-08-12 Nec Corp Doppler radar of micro wave

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514269B1 (en) * 1970-10-13 1976-02-10
JPS5295994A (en) * 1976-02-06 1977-08-12 Nec Corp Doppler radar of micro wave

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