JPS55166064A - Doppler speedometer - Google Patents

Doppler speedometer

Info

Publication number
JPS55166064A
JPS55166064A JP7412179A JP7412179A JPS55166064A JP S55166064 A JPS55166064 A JP S55166064A JP 7412179 A JP7412179 A JP 7412179A JP 7412179 A JP7412179 A JP 7412179A JP S55166064 A JPS55166064 A JP S55166064A
Authority
JP
Japan
Prior art keywords
mixer
matching element
circulator
supplied
partly
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
JP7412179A
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 JP7412179A priority Critical patent/JPS55166064A/en
Publication of JPS55166064A publication Critical patent/JPS55166064A/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 enable discrimination of the direction of a received signal in a Doppler speedometer and improve the efficiency of the speedometer by functionally constructing an oscillator, two circulators, two mixers and three matching elements. CONSTITUTION:The oscillated output of a microwave oscillator 1 is partly reflected through a first circulator 2 via mismatching of a matching element 5 to be supplied as a local oscillation power to a first mixer 9, and partly applied to a second circulator 3. Most of the oscillated output in the second circulator 3 is radiated through a third matching element 6 and an natenna 4 as a transmission wave. The reflected wave from the third matching element 6 is supplied through the second matching element 7 into the second mixer 8. The received wave is supplied partly through the second circulator 3 into the second mixer 8, and partly reflected through the second matching element 7 to be supplied to the first mixer 9. Since the received wave and the locally oscillated signal are mixed in the mixer, a Doppler signal is detected in the output of the mixer.
JP7412179A 1979-06-12 1979-06-12 Doppler speedometer Pending JPS55166064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7412179A JPS55166064A (en) 1979-06-12 1979-06-12 Doppler speedometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7412179A JPS55166064A (en) 1979-06-12 1979-06-12 Doppler speedometer

Publications (1)

Publication Number Publication Date
JPS55166064A true JPS55166064A (en) 1980-12-24

Family

ID=13538052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7412179A Pending JPS55166064A (en) 1979-06-12 1979-06-12 Doppler speedometer

Country Status (1)

Country Link
JP (1) JPS55166064A (en)

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