JPS5627669A - Device for measuring azimuth - Google Patents

Device for measuring azimuth

Info

Publication number
JPS5627669A
JPS5627669A JP10425479A JP10425479A JPS5627669A JP S5627669 A JPS5627669 A JP S5627669A JP 10425479 A JP10425479 A JP 10425479A JP 10425479 A JP10425479 A JP 10425479A JP S5627669 A JPS5627669 A JP S5627669A
Authority
JP
Japan
Prior art keywords
signals
incoming
azimuth
antennas
electric waves
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.)
Granted
Application number
JP10425479A
Other languages
Japanese (ja)
Other versions
JPS634152B2 (en
Inventor
Tadao Tsuji
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 JP10425479A priority Critical patent/JPS5627669A/en
Publication of JPS5627669A publication Critical patent/JPS5627669A/en
Publication of JPS634152B2 publication Critical patent/JPS634152B2/ja
Granted 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
    • G01S3/48—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured

Landscapes

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

Abstract

PURPOSE:To measure the incoming azimuth of electric waves independently of the frequency of the incoming waves, by dividing each output of two antennas into two portions, delaying one of the portions, determining the phase difference between the delayed portion and the undelayed portion and calculating the incoming angle of the electric waves. CONSTITUTION:Electric waves incoming in a direction H' are received by antennas 201, 202. Signals from the antennas are divided into other signals A, C, B, D by distributors 203, 204. The signals A, B are processed through a phase detector 207 and a phase angle calculation circuit 209 so that the phase difference thetaa between the signals is applied to an azimuth calculation circuit 211. The other signals C, D are processed through a phase detector 208 and a phase angle calculation circuit 210 so that the phase difference thetab between the signals is applied to the azimuth calculation circuit 211. The signals C, B are transmitted through delay lines 205, 206. The azimuth H' of the incoming electric waves is calculated in the circuit 211 from the phase differences thetaa, thetab between the signals in accordance with a formula I where D denotes the distance between the antennas, taud denotes a delay time and C denotes the velocity of light. Since the D, taud and C are known values, the azimuth can be determined independently of the frequency of the incoming electric waves.
JP10425479A 1979-08-15 1979-08-15 Device for measuring azimuth Granted JPS5627669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10425479A JPS5627669A (en) 1979-08-15 1979-08-15 Device for measuring azimuth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10425479A JPS5627669A (en) 1979-08-15 1979-08-15 Device for measuring azimuth

Publications (2)

Publication Number Publication Date
JPS5627669A true JPS5627669A (en) 1981-03-18
JPS634152B2 JPS634152B2 (en) 1988-01-27

Family

ID=14375786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10425479A Granted JPS5627669A (en) 1979-08-15 1979-08-15 Device for measuring azimuth

Country Status (1)

Country Link
JP (1) JPS5627669A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6185608U (en) * 1984-11-12 1986-06-05
JPS61102737U (en) * 1984-12-13 1986-06-30

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9581677B2 (en) * 2013-08-23 2017-02-28 Fluke Corporation Direction of arrival determination for a radio signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6185608U (en) * 1984-11-12 1986-06-05
JPH0331781Y2 (en) * 1984-11-12 1991-07-05
JPS61102737U (en) * 1984-12-13 1986-06-30

Also Published As

Publication number Publication date
JPS634152B2 (en) 1988-01-27

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