JPS5769267A - Antenna apparatus for azimuth measuring apparatus - Google Patents

Antenna apparatus for azimuth measuring apparatus

Info

Publication number
JPS5769267A
JPS5769267A JP55145753A JP14575380A JPS5769267A JP S5769267 A JPS5769267 A JP S5769267A JP 55145753 A JP55145753 A JP 55145753A JP 14575380 A JP14575380 A JP 14575380A JP S5769267 A JPS5769267 A JP S5769267A
Authority
JP
Japan
Prior art keywords
antennas
phase
low frequency
output
tnwte
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
JP55145753A
Other languages
Japanese (ja)
Inventor
Takeshi Yasuda
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.)
TAIYOU MUSEN KK
Taiyo Musen Co Ltd
Original Assignee
TAIYOU MUSEN KK
Taiyo Musen 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 TAIYOU MUSEN KK, Taiyo Musen Co Ltd filed Critical TAIYOU MUSEN KK
Priority to JP55145753A priority Critical patent/JPS5769267A/en
Priority to GB8118458A priority patent/GB2087186B/en
Priority to DE3125304A priority patent/DE3125304C2/en
Priority to FR8113128A priority patent/FR2492536B1/en
Priority to KR1019810002612A priority patent/KR860000330B1/en
Publication of JPS5769267A publication Critical patent/JPS5769267A/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
    • 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
    • G01S3/143—Systems for determining direction or deviation from predetermined direction by vectorial combination of signals derived from differently oriented antennae
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE: To obtain a phase modulated wave corresponding to the coming direction of a radio wave by synthetizing the output of several antennas arranged on one circumference through amplitude modulation with a low frequency signal at a phase angle corresponding to the position of the antennas.
CONSTITUTION: Four vertical dipole antennas AnWAe are arranged at an equispace on one circumference. The outputs of these antennas are applied to modulators MnWMe to effect a amplitude modulation with low frequency signals of TnWTe. The signals of TnWTe shall be deviated by 90° corresponding to the direction of the antennas. When the value of 2l is smaller enough than the wavelength λ, a carrier component To obtained from the synthetizing of the output of modulators MnWMe is the result of a phase modulation by a low frequency signal with a phase deviation of a certain value. So, the output is demodulated to determine a difference in the phase between the reference low frequency and the demodulation signal. This indicates the coming direction of the radio wave. In this method, any frequency received can be measured simply even when it varies in a wide range.
COPYRIGHT: (C)1982,JPO&Japio
JP55145753A 1980-10-20 1980-10-20 Antenna apparatus for azimuth measuring apparatus Pending JPS5769267A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP55145753A JPS5769267A (en) 1980-10-20 1980-10-20 Antenna apparatus for azimuth measuring apparatus
GB8118458A GB2087186B (en) 1980-10-20 1981-06-16 Radio direction finder
DE3125304A DE3125304C2 (en) 1980-10-20 1981-06-27 Antenna system for a direction finder
FR8113128A FR2492536B1 (en) 1980-10-20 1981-07-03 ANTENNA SYSTEM FOR DIRECTION INDICATOR OR RADIOGONIOMETER
KR1019810002612A KR860000330B1 (en) 1980-10-20 1981-07-18 A antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55145753A JPS5769267A (en) 1980-10-20 1980-10-20 Antenna apparatus for azimuth measuring apparatus

Publications (1)

Publication Number Publication Date
JPS5769267A true JPS5769267A (en) 1982-04-27

Family

ID=15392353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55145753A Pending JPS5769267A (en) 1980-10-20 1980-10-20 Antenna apparatus for azimuth measuring apparatus

Country Status (5)

Country Link
JP (1) JPS5769267A (en)
KR (1) KR860000330B1 (en)
DE (1) DE3125304C2 (en)
FR (1) FR2492536B1 (en)
GB (1) GB2087186B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045859A (en) * 1988-09-15 1991-09-03 Aviation Systems Concepts, Inc. Phase reference navigation system and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094822B (en) * 1957-11-07 1960-12-15 Dr Maximilian Waechtler Arrangement for three-dimensional direction finding of a radio transmitter
FR1231865A (en) * 1959-04-17 1960-10-04 Galvanometric indicator radio-goniometer
DE977793C (en) * 1961-05-10 1970-05-27 Telefunken Patent Procedure for direction finding in pulsed signals
US3435454A (en) * 1968-02-01 1969-03-25 Us Army Electronic servo system
US4135191A (en) * 1977-06-13 1979-01-16 The Bendix Corporation Coherent demodulator
GB2056812B (en) * 1979-08-08 1984-06-06 Taiyo Musen Co Ltd Radio direction finder

Also Published As

Publication number Publication date
FR2492536B1 (en) 1985-11-08
KR830006831A (en) 1983-10-06
GB2087186B (en) 1984-09-12
DE3125304A1 (en) 1982-05-13
DE3125304C2 (en) 1984-08-09
FR2492536A1 (en) 1982-04-23
KR860000330B1 (en) 1986-04-09
GB2087186A (en) 1982-05-19

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