GB2057807B - Direction finders - Google Patents

Direction finders

Info

Publication number
GB2057807B
GB2057807B GB7929349A GB7929349A GB2057807B GB 2057807 B GB2057807 B GB 2057807B GB 7929349 A GB7929349 A GB 7929349A GB 7929349 A GB7929349 A GB 7929349A GB 2057807 B GB2057807 B GB 2057807B
Authority
GB
United Kingdom
Prior art keywords
direction finders
finders
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.)
Expired
Application number
GB7929349A
Other versions
GB2057807A (en
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London 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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Priority to GB7929349A priority Critical patent/GB2057807B/en
Publication of GB2057807A publication Critical patent/GB2057807A/en
Application granted granted Critical
Publication of GB2057807B publication Critical patent/GB2057807B/en
Expired 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
    • G01S3/58—Rotating or oscillating beam systems using continuous analysis of received signal for determining direction in the plane of rotation or oscillation or for determining deviation from a predetermined direction in such a plane
    • G01S3/60—Broad-beam systems producing in the receiver a substantially sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver, e.g. cardioid system
    • G01S3/64—Broad-beam systems producing in the receiver a substantially sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver, e.g. cardioid system wherein the phase angle of the signal is determined by phase comparison with a reference alternating signal varying in synchronism with the directivity variation
    • 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
    • H01Q3/24—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H01Q3/242—Circumferential scanning

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Circuits Of Receivers In General (AREA)
GB7929349A 1979-08-23 1979-08-23 Direction finders Expired GB2057807B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7929349A GB2057807B (en) 1979-08-23 1979-08-23 Direction finders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7929349A GB2057807B (en) 1979-08-23 1979-08-23 Direction finders

Publications (2)

Publication Number Publication Date
GB2057807A GB2057807A (en) 1981-04-01
GB2057807B true GB2057807B (en) 1983-08-10

Family

ID=10507379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7929349A Expired GB2057807B (en) 1979-08-23 1979-08-23 Direction finders

Country Status (1)

Country Link
GB (1) GB2057807B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143099A (en) * 1983-07-07 1985-01-30 Standard Telephones Cables Ltd Radio direction finding

Also Published As

Publication number Publication date
GB2057807A (en) 1981-04-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee