FR2260804A1 - Distance measurement using frequency modulated radar - employs corrections for Doppler effects also echo separation techniques - Google Patents

Distance measurement using frequency modulated radar - employs corrections for Doppler effects also echo separation techniques

Info

Publication number
FR2260804A1
FR2260804A1 FR7404127A FR7404127A FR2260804A1 FR 2260804 A1 FR2260804 A1 FR 2260804A1 FR 7404127 A FR7404127 A FR 7404127A FR 7404127 A FR7404127 A FR 7404127A FR 2260804 A1 FR2260804 A1 FR 2260804A1
Authority
FR
France
Prior art keywords
frequency modulated
modulated radar
doppler effects
corrections
employs
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.)
Granted
Application number
FR7404127A
Other languages
French (fr)
Other versions
FR2260804B1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7404127A priority Critical patent/FR2260804A1/en
Publication of FR2260804A1 publication Critical patent/FR2260804A1/en
Application granted granted Critical
Publication of FR2260804B1 publication Critical patent/FR2260804B1/fr
Granted 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/345—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using triangular modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Frequency modulated radar techniques are used in distance measuring equipments such as radio altimeters in aircraft. Doppler effects and echo separation effects can be eliminated. A frequency modulated radar system using a common antenna (4) with a circulator (3) transmits the output of an oscillator (1) which has been modulated by a sawtooth waveform from a radial sweep wobbulator (10). This wobbulator controls a pulse generator (13) to delay the start of the sawtooth waveform. It also blocks an amplifier (7) in the receiver and unblocks the doppler measurement amplifier (14) at the mixer (6) output. The signal proportional to speed is applied to a sweep delay (15) circuit for the cathode ray tube thus correcting for doppler effects. The speed of the aircraft is indicated (16).
FR7404127A 1974-02-07 1974-02-07 Distance measurement using frequency modulated radar - employs corrections for Doppler effects also echo separation techniques Granted FR2260804A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7404127A FR2260804A1 (en) 1974-02-07 1974-02-07 Distance measurement using frequency modulated radar - employs corrections for Doppler effects also echo separation techniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7404127A FR2260804A1 (en) 1974-02-07 1974-02-07 Distance measurement using frequency modulated radar - employs corrections for Doppler effects also echo separation techniques

Publications (2)

Publication Number Publication Date
FR2260804A1 true FR2260804A1 (en) 1975-09-05
FR2260804B1 FR2260804B1 (en) 1976-10-08

Family

ID=9134617

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7404127A Granted FR2260804A1 (en) 1974-02-07 1974-02-07 Distance measurement using frequency modulated radar - employs corrections for Doppler effects also echo separation techniques

Country Status (1)

Country Link
FR (1) FR2260804A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117031415A (en) * 2023-10-10 2023-11-10 深圳迈睿智能科技有限公司 Microwave detector with fixed frequency conversion rule and anti-radiation interference method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117031415A (en) * 2023-10-10 2023-11-10 深圳迈睿智能科技有限公司 Microwave detector with fixed frequency conversion rule and anti-radiation interference method thereof
CN117031415B (en) * 2023-10-10 2024-01-16 深圳迈睿智能科技有限公司 Microwave detector with fixed frequency conversion rule and anti-radiation interference method thereof

Also Published As

Publication number Publication date
FR2260804B1 (en) 1976-10-08

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Legal Events

Date Code Title Description
ST Notification of lapse