BE493987A - - Google Patents

Info

Publication number
BE493987A
BE493987A BE493987DA BE493987A BE 493987 A BE493987 A BE 493987A BE 493987D A BE493987D A BE 493987DA BE 493987 A BE493987 A BE 493987A
Authority
BE
Belgium
Prior art keywords
currents
emi
frequency
frequencies
group
Prior art date
Application number
Other languages
English (en)
French (fr)
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.)
Publication of BE493987A publication Critical patent/BE493987A/fr

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08Systems for determining direction or position line
    • G01S1/20Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/30Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference
    • G01S1/304Analogous systems in which a beat frequency, obtained by heterodyning the signals, is compared in phase with a reference signal obtained by heterodyning the signals in a fixed reference point and transmitted therefrom, e.g. LORAC (long range accuracy) or TORAN systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
BE493987D 1949-02-22 BE493987A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1011506T 1949-02-22

Publications (1)

Publication Number Publication Date
BE493987A true BE493987A (enrdf_load_html_response)

Family

ID=9570002

Family Applications (1)

Application Number Title Priority Date Filing Date
BE493987D BE493987A (enrdf_load_html_response) 1949-02-22

Country Status (3)

Country Link
BE (1) BE493987A (enrdf_load_html_response)
FR (1) FR1011506A (enrdf_load_html_response)
NL (1) NL145167B (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1221696B (de) * 1962-02-15 1966-07-28 Telefunken Patent Funknavigationsverfahren und Anordnung zur Durchfuehrung desselben
DE1239743B (de) * 1962-03-17 1967-05-03 Telefunken Patent Navigationsverfahren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1221696B (de) * 1962-02-15 1966-07-28 Telefunken Patent Funknavigationsverfahren und Anordnung zur Durchfuehrung desselben
DE1239743B (de) * 1962-03-17 1967-05-03 Telefunken Patent Navigationsverfahren

Also Published As

Publication number Publication date
NL145167B (nl)
FR1011506A (fr) 1952-06-24

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