GB1339245A - Twochannel direction finders - Google Patents

Twochannel direction finders

Info

Publication number
GB1339245A
GB1339245A GB2083472A GB2083472A GB1339245A GB 1339245 A GB1339245 A GB 1339245A GB 2083472 A GB2083472 A GB 2083472A GB 2083472 A GB2083472 A GB 2083472A GB 1339245 A GB1339245 A GB 1339245A
Authority
GB
United Kingdom
Prior art keywords
frequency
circuit
condition
local oscillator
finder
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
GB2083472A
Other languages
English (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.)
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
Publication of GB1339245A publication Critical patent/GB1339245A/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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
GB2083472A 1971-05-07 1972-05-04 Twochannel direction finders Expired GB1339245A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO1734/71A NO130705C (enExample) 1971-05-07 1971-05-07

Publications (1)

Publication Number Publication Date
GB1339245A true GB1339245A (en) 1973-11-28

Family

ID=19878400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2083472A Expired GB1339245A (en) 1971-05-07 1972-05-04 Twochannel direction finders

Country Status (6)

Country Link
US (1) US3747107A (enExample)
DE (1) DE2221909A1 (enExample)
FR (1) FR2137608B1 (enExample)
GB (1) GB1339245A (enExample)
NL (1) NL7206226A (enExample)
NO (1) NO130705C (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198633A (en) * 1978-04-07 1980-04-15 Bayly Engineering Limited Electronic signal processing system
US4510499A (en) * 1981-05-07 1985-04-09 Vega Precision Laboratories, Inc. TACAN data link system
US4724442A (en) * 1986-05-29 1988-02-09 E-Systems, Inc. Method and apparatus for loop direction finding with no ambiguity
US5003316A (en) * 1989-04-24 1991-03-26 E-Systems, Inc. Single null miniature direction finder
US4983983A (en) * 1989-12-05 1991-01-08 The United States Of America As Represented By The Secretary Of The Navy Semi-automatic direction finding set
US6581164B1 (en) * 2000-01-03 2003-06-17 Conexant Systems, Inc. System for adjusting clock frequency based upon amount of unread data stored in sequential memory when reading a new line of data within a field of data

Also Published As

Publication number Publication date
NL7206226A (enExample) 1972-11-09
NO130705B (enExample) 1974-10-14
FR2137608A1 (enExample) 1972-12-29
DE2221909A1 (de) 1972-11-23
NO130705C (enExample) 1975-01-22
FR2137608B1 (enExample) 1977-11-18
US3747107A (en) 1973-07-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee