GB858728A - Direction finding apparatus - Google Patents

Direction finding apparatus

Info

Publication number
GB858728A
GB858728A GB2933158A GB2933158A GB858728A GB 858728 A GB858728 A GB 858728A GB 2933158 A GB2933158 A GB 2933158A GB 2933158 A GB2933158 A GB 2933158A GB 858728 A GB858728 A GB 858728A
Authority
GB
United Kingdom
Prior art keywords
degrees
aerials
aerial
output
source
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
GB2933158A
Inventor
Ernest Alvin Seaman
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.)
Minister of National Defence of Canada
UK Secretary of State for Defence
Original Assignee
Minister of National Defence of Canada
UK Secretary of State for Defence
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 Minister of National Defence of Canada, UK Secretary of State for Defence filed Critical Minister of National Defence of Canada
Priority to GB2933158A priority Critical patent/GB858728A/en
Publication of GB858728A publication Critical patent/GB858728A/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

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

858,728. Radio direction-finding. MINISTER OF NATIONAL DEFENCE OF HER MAJESTY'S CANADIAN GOVERNMENT. Sept. 12, 1958, No. 29331/58. Class 40(7). A direction-finder for determining the direction of a radiation source in the presence of ambient random radiation comprises two angularlyspaced unidirectional broad-beam aerials 10, 11 having partially overlapping directivity patterns and a reference source of power 12, e.g. a dummy aerial, adapted to supply power equivalent to said ambient random radiation. The aerials 10, 11 and the power source 12 are connected cyclically one at a time to a receiver 14 under the control of a switching frequency generator 16 and the receiver output is applied through a narrow-band filter 19 tuned to the aerial switching frequency to a phase comparator 17 together with a reference signal output from the generator 16, the output # from the phase comparator 17 being applied to a bearing display 22. Expressions are given for the values of # in terms of the amplitudes A and C of the signals received by the two aerials when the switching periods for each aerial are 120 degrees, 135 degrees and 90 degrees, the corresponding switching periods for the reference signal being 120 degrees, 90 degrees and 180 degrees, and it is shown that the value of # is independent of the signal strength, even if the latter is below noise level.
GB2933158A 1958-09-12 1958-09-12 Direction finding apparatus Expired GB858728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2933158A GB858728A (en) 1958-09-12 1958-09-12 Direction finding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2933158A GB858728A (en) 1958-09-12 1958-09-12 Direction finding apparatus

Publications (1)

Publication Number Publication Date
GB858728A true GB858728A (en) 1961-01-11

Family

ID=10289857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2933158A Expired GB858728A (en) 1958-09-12 1958-09-12 Direction finding apparatus

Country Status (1)

Country Link
GB (1) GB858728A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110794362A (en) * 2019-09-30 2020-02-14 西安空间无线电技术研究所 Short-pulse high-power microwave rapid direction finding system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110794362A (en) * 2019-09-30 2020-02-14 西安空间无线电技术研究所 Short-pulse high-power microwave rapid direction finding system and method
CN110794362B (en) * 2019-09-30 2022-04-12 西安空间无线电技术研究所 Short-pulse high-power microwave rapid direction finding system and method

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