FR941697A - Improvements to direction finders - Google Patents

Improvements to direction finders

Info

Publication number
FR941697A
FR941697A FR941697DA FR941697A FR 941697 A FR941697 A FR 941697A FR 941697D A FR941697D A FR 941697DA FR 941697 A FR941697 A FR 941697A
Authority
FR
France
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
Other languages
French (fr)
Inventor
Louis John Heaton Armstrong
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR941697A publication Critical patent/FR941697A/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
    • G01S3/04—Details
    • G01S3/06—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna
    • G01S3/065—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna by using non-directional aerial

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Near-Field Transmission Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
FR941697D 1944-11-28 1946-07-06 Improvements to direction finders Expired FR941697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23751/44A GB587502A (en) 1944-11-28 1944-11-28 Improvements in direction finders

Publications (1)

Publication Number Publication Date
FR941697A true FR941697A (en) 1949-01-18

Family

ID=10200711

Family Applications (1)

Application Number Title Priority Date Filing Date
FR941697D Expired FR941697A (en) 1944-11-28 1946-07-06 Improvements to direction finders

Country Status (4)

Country Link
US (1) US2489290A (en)
ES (1) ES172612A1 (en)
FR (1) FR941697A (en)
GB (1) GB587502A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2003932A (en) * 1932-12-27 1935-06-04 John W Greig Radio direction finder
US2107633A (en) * 1935-03-04 1938-02-08 Frederick J Hooven Direction finder
US2257594A (en) * 1938-07-06 1941-09-30 Csf Direct reading radio goniometer
US2321478A (en) * 1941-10-13 1943-06-08 Hazeltine Corp Ultra-high-frequency carriersignal translating system

Also Published As

Publication number Publication date
GB587502A (en) 1947-04-28
US2489290A (en) 1949-11-29
ES172612A1 (en) 1946-03-16

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