JPS5557166A - Doppler radar - Google Patents

Doppler radar

Info

Publication number
JPS5557166A
JPS5557166A JP12925278A JP12925278A JPS5557166A JP S5557166 A JPS5557166 A JP S5557166A JP 12925278 A JP12925278 A JP 12925278A JP 12925278 A JP12925278 A JP 12925278A JP S5557166 A JPS5557166 A JP S5557166A
Authority
JP
Japan
Prior art keywords
phase
theta
switch
signal
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
JP12925278A
Other languages
Japanese (ja)
Inventor
Hisayoshi Ueno
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12925278A priority Critical patent/JPS5557166A/en
Publication of JPS5557166A publication Critical patent/JPS5557166A/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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/62—Sense-of-movement determination

Landscapes

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

Abstract

PURPOSE:To obtain a Doppler radar which can decide the direction by dividing the oscillation output of the microwave via the directional coupler into the transmission wave and the local oscillation power and then switching the phase of either one of the microwaves by the phase switch. CONSTITUTION:Part of the microwaves generated from oscillator 1 is sent to mixer 6 via directional coupler 2, and the other is sent outside through phase switch 3 to be the local oscillation power and the transmission wave each. Now switch 3 is changed to 0 deg. and theta deg. to give a phase comparison between the Doppler signals at 0 deg. and theta deg.. The signal at phi deg. has the phase variation of +theta and -theta to the signal at 0 deg. according to the short or long distance between both signals. This variation is realized in the form of a device. In other words, switch 3 is varied between 0 deg. and theta deg. through the time division and by the signal given from synchronous signal generator 11, and then divided into two channels via gates 13 and 14 to receive the phase comparison at phase comparator 19 through waveform shaping circuits 17 and 18.
JP12925278A 1978-10-20 1978-10-20 Doppler radar Pending JPS5557166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12925278A JPS5557166A (en) 1978-10-20 1978-10-20 Doppler radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12925278A JPS5557166A (en) 1978-10-20 1978-10-20 Doppler radar

Publications (1)

Publication Number Publication Date
JPS5557166A true JPS5557166A (en) 1980-04-26

Family

ID=15004962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12925278A Pending JPS5557166A (en) 1978-10-20 1978-10-20 Doppler radar

Country Status (1)

Country Link
JP (1) JPS5557166A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0244274A (en) * 1988-06-20 1990-02-14 Hughes Aircraft Co Narrow band fm radar for detecting obstacle
JPH06264969A (en) * 1993-02-05 1994-09-20 Carl Freudenberg:Fa Driving system of automobile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51147194A (en) * 1975-06-11 1976-12-17 Matsushita Electric Ind Co Ltd Doppler radar

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51147194A (en) * 1975-06-11 1976-12-17 Matsushita Electric Ind Co Ltd Doppler radar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0244274A (en) * 1988-06-20 1990-02-14 Hughes Aircraft Co Narrow band fm radar for detecting obstacle
JPH06264969A (en) * 1993-02-05 1994-09-20 Carl Freudenberg:Fa Driving system of automobile

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