FR2721757B1 - Omnidirectional antenna in azimuth and directive on site and maritime responder thus equipped. - Google Patents

Omnidirectional antenna in azimuth and directive on site and maritime responder thus equipped.

Info

Publication number
FR2721757B1
FR2721757B1 FR9407944A FR9407944A FR2721757B1 FR 2721757 B1 FR2721757 B1 FR 2721757B1 FR 9407944 A FR9407944 A FR 9407944A FR 9407944 A FR9407944 A FR 9407944A FR 2721757 B1 FR2721757 B1 FR 2721757B1
Authority
FR
France
Prior art keywords
maritime
responder
directive
azimuth
site
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 - Fee Related
Application number
FR9407944A
Other languages
French (fr)
Other versions
FR2721757A1 (en
Inventor
Annick Ramahefarivony
Jean-Pierre Chopard
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.)
JAC INTERNATIONAL
Original Assignee
JAC INTERNATIONAL
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 JAC INTERNATIONAL filed Critical JAC INTERNATIONAL
Priority to FR9407944A priority Critical patent/FR2721757B1/en
Publication of FR2721757A1 publication Critical patent/FR2721757A1/en
Application granted granted Critical
Publication of FR2721757B1 publication Critical patent/FR2721757B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
FR9407944A 1994-06-28 1994-06-28 Omnidirectional antenna in azimuth and directive on site and maritime responder thus equipped. Expired - Fee Related FR2721757B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9407944A FR2721757B1 (en) 1994-06-28 1994-06-28 Omnidirectional antenna in azimuth and directive on site and maritime responder thus equipped.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9407944A FR2721757B1 (en) 1994-06-28 1994-06-28 Omnidirectional antenna in azimuth and directive on site and maritime responder thus equipped.

Publications (2)

Publication Number Publication Date
FR2721757A1 FR2721757A1 (en) 1995-12-29
FR2721757B1 true FR2721757B1 (en) 1996-09-13

Family

ID=9464736

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9407944A Expired - Fee Related FR2721757B1 (en) 1994-06-28 1994-06-28 Omnidirectional antenna in azimuth and directive on site and maritime responder thus equipped.

Country Status (1)

Country Link
FR (1) FR2721757B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1075325A (en) * 1953-02-04 1954-10-14 Radio Ind Improvements to aerial structures giving an omnidirectional radiation pattern in a plane
US4479127A (en) * 1982-08-30 1984-10-23 Gte Products Corporation Bi-loop antenna system
FR2634598B1 (en) * 1988-07-22 1990-10-05 Thomson Lgt AN OMNIDIRECTIONAL ANTENNA, IN PARTICULAR FOR THE TRANSMISSION OF BROADCASTING OR TELEVISION SIGNALS IN THE UHF BAND, AND RADIATION SYSTEM IN THE FORM OF A GROUPING OF THESE ANTENNAS
DE3908893A1 (en) * 1989-03-17 1990-09-20 Siemens Ag Ring radiating element using printed circuit technology
FR2644937B1 (en) * 1989-03-22 1991-09-27 Bourdier Jean OMNIDIRECTIVE ANTENNA IN MAXIMUM GAIN CROSS-CIRCULAR POLARIZATION UNDER THE HORIZON

Also Published As

Publication number Publication date
FR2721757A1 (en) 1995-12-29

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Legal Events

Date Code Title Description
ST Notification of lapse