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JPS55152478A - Doppler radar - Google Patents

Doppler radar

Info

Publication number
JPS55152478A
JPS55152478A JP5994779A JP5994779A JPS55152478A JP S55152478 A JPS55152478 A JP S55152478A JP 5994779 A JP5994779 A JP 5994779A JP 5994779 A JP5994779 A JP 5994779A JP S55152478 A JPS55152478 A JP S55152478A
Authority
JP
Japan
Prior art keywords
mixers
circulator
target
doppler signals
doppler
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
JP5994779A
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 JP5994779A priority Critical patent/JPS55152478A/en
Publication of JPS55152478A publication Critical patent/JPS55152478A/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 accurately detect a direction as well through simple constitution, by comparing the phases of the Doppler signals of two mixers provided in series between the output terminal of a directional coupler and a circulator. CONSTITUTION:Most of the oscillation output of an oscillator 1 is transmitted through a directional coupler 2, a matching unit 4, a circulator 3 and an antenna 5 and the other of the oscillation output is applied as a local oscillation signal to diode mixers which are provided in series between the output terminal of the couple 2 and the circulator 3 and which have a phase difference of theta. Doppler signals Sd1, Sd2, which are generated by the mixers 6, 7 which act on reflected and received waves from a target, have a phase difference of 2theta. The phase of each Doppler signal is advanced or delayed depending on the approaching or moving- away of the target. The phases of the Doppler signals produced by the mixers 6, 7 are compared with each other by a phase comparator 10. As a result, not only the velocity of the target but also its moving direction can be detected through a simple construction.
JP5994779A 1979-05-16 1979-05-16 Doppler radar Pending JPS55152478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5994779A JPS55152478A (en) 1979-05-16 1979-05-16 Doppler radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5994779A JPS55152478A (en) 1979-05-16 1979-05-16 Doppler radar

Publications (1)

Publication Number Publication Date
JPS55152478A true JPS55152478A (en) 1980-11-27

Family

ID=13127841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5994779A Pending JPS55152478A (en) 1979-05-16 1979-05-16 Doppler radar

Country Status (1)

Country Link
JP (1) JPS55152478A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017189A (en) * 1973-06-12 1975-02-22
JPS50104514A (en) * 1974-01-18 1975-08-18

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017189A (en) * 1973-06-12 1975-02-22
JPS50104514A (en) * 1974-01-18 1975-08-18

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