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FR2267556A1 - Determining target position above reflecting surface - uses three frequencies in radar with four horn antennae - Google Patents

Determining target position above reflecting surface - uses three frequencies in radar with four horn antennae

Info

Publication number
FR2267556A1
FR2267556A1 FR7333694A FR7333694A FR2267556A1 FR 2267556 A1 FR2267556 A1 FR 2267556A1 FR 7333694 A FR7333694 A FR 7333694A FR 7333694 A FR7333694 A FR 7333694A FR 2267556 A1 FR2267556 A1 FR 2267556A1
Authority
FR
France
Prior art keywords
radar
signals
frequencies
horn
reflecting surface
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
FR7333694A
Other languages
French (fr)
Other versions
FR2267556B1 (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.)
Etat Francais
Original Assignee
Etat Francais
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 Etat Francais filed Critical Etat Francais
Priority to FR7333694A priority Critical patent/FR2267556A1/en
Publication of FR2267556A1 publication Critical patent/FR2267556A1/en
Application granted granted Critical
Publication of FR2267556B1 publication Critical patent/FR2267556B1/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
    • G01S13/36—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
    • G01S13/38—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal wherein more than one modulation frequency is used

Landscapes

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

Abstract

A target just above the sea causes an image effect giving rise to erroneous position data. The exact position is determined using different frequencies in a radar with four horn antennas. Three oscillator outputs are amplified and passed through a transmit receive switch to a monopulse radar with four horn antennae. These signals are transmitted separately with a time interval. The three received signals pass through the switch to a sum channel and to two difference signal channels which are then amplified by low noise amplifiers. These signals are filtered and processed to obtain amplitude and phase signals which are digitally processed to give azimuth, elevation, height and range data.
FR7333694A 1973-09-20 1973-09-20 Determining target position above reflecting surface - uses three frequencies in radar with four horn antennae Granted FR2267556A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7333694A FR2267556A1 (en) 1973-09-20 1973-09-20 Determining target position above reflecting surface - uses three frequencies in radar with four horn antennae

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7333694A FR2267556A1 (en) 1973-09-20 1973-09-20 Determining target position above reflecting surface - uses three frequencies in radar with four horn antennae

Publications (2)

Publication Number Publication Date
FR2267556A1 true FR2267556A1 (en) 1975-11-07
FR2267556B1 FR2267556B1 (en) 1977-05-27

Family

ID=9125292

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7333694A Granted FR2267556A1 (en) 1973-09-20 1973-09-20 Determining target position above reflecting surface - uses three frequencies in radar with four horn antennae

Country Status (1)

Country Link
FR (1) FR2267556A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2397958B (en) * 2001-10-30 2005-11-23 Optex Co Ltd Dual-frequency microwave sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2397958B (en) * 2001-10-30 2005-11-23 Optex Co Ltd Dual-frequency microwave sensor
US7079029B2 (en) 2001-10-30 2006-07-18 Optex Co., Ltd. Dual-frequency microwave sensor

Also Published As

Publication number Publication date
FR2267556B1 (en) 1977-05-27

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Legal Events

Date Code Title Description
ST Notification of lapse