FR2636781B1 - Cadre antenne pour poste de controle de presence, emettant un signal primaire pour recevoir en echo de repondeurs des signaux individualises - Google Patents

Cadre antenne pour poste de controle de presence, emettant un signal primaire pour recevoir en echo de repondeurs des signaux individualises

Info

Publication number
FR2636781B1
FR2636781B1 FR8812102A FR8812102A FR2636781B1 FR 2636781 B1 FR2636781 B1 FR 2636781B1 FR 8812102 A FR8812102 A FR 8812102A FR 8812102 A FR8812102 A FR 8812102A FR 2636781 B1 FR2636781 B1 FR 2636781B1
Authority
FR
France
Prior art keywords
echo
transmitting
control station
primary signal
antenna frame
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
FR8812102A
Other languages
English (en)
Other versions
FR2636781A1 (fr
Inventor
Bernard Constans
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.)
MATRA SYSTEMES SECURITE
Original Assignee
MATRA SYSTEMES SECURITE
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 MATRA SYSTEMES SECURITE filed Critical MATRA SYSTEMES SECURITE
Priority to FR8812102A priority Critical patent/FR2636781B1/fr
Publication of FR2636781A1 publication Critical patent/FR2636781A1/fr
Application granted granted Critical
Publication of FR2636781B1 publication Critical patent/FR2636781B1/fr
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
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
FR8812102A 1988-09-16 1988-09-16 Cadre antenne pour poste de controle de presence, emettant un signal primaire pour recevoir en echo de repondeurs des signaux individualises Expired - Fee Related FR2636781B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8812102A FR2636781B1 (fr) 1988-09-16 1988-09-16 Cadre antenne pour poste de controle de presence, emettant un signal primaire pour recevoir en echo de repondeurs des signaux individualises

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8812102A FR2636781B1 (fr) 1988-09-16 1988-09-16 Cadre antenne pour poste de controle de presence, emettant un signal primaire pour recevoir en echo de repondeurs des signaux individualises

Publications (2)

Publication Number Publication Date
FR2636781A1 FR2636781A1 (fr) 1990-03-23
FR2636781B1 true FR2636781B1 (fr) 1991-06-14

Family

ID=9370070

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8812102A Expired - Fee Related FR2636781B1 (fr) 1988-09-16 1988-09-16 Cadre antenne pour poste de controle de presence, emettant un signal primaire pour recevoir en echo de repondeurs des signaux individualises

Country Status (1)

Country Link
FR (1) FR2636781B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638597A1 (de) * 1996-09-20 1998-03-26 Bosch Gmbh Robert Antennenanordnung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE507762C (de) * 1929-03-19 1930-09-19 Manfred Von Ardenne Rahmenantenne mit abgeschirmten Draehten
US2192321A (en) * 1937-04-16 1940-03-05 Emil Huber Wireless receiving arrangement with frame antenna
DE703294C (de) * 1938-10-05 1941-03-22 Telefunken Gmbh Peilrahmen mit abgeschirmten Windungen
US3863244A (en) * 1972-06-14 1975-01-28 Lichtblau G J Electronic security system having improved noise discrimination
JPS5226879B2 (fr) * 1972-09-19 1977-07-16
US4373163A (en) * 1980-07-14 1983-02-08 I.D. Engineering, Inc. Loop antenna for security systems
US4511900A (en) * 1982-05-10 1985-04-16 Rockwell International Corporation Current enhanced monopole radiation type antenna apparatus

Also Published As

Publication number Publication date
FR2636781A1 (fr) 1990-03-23

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Legal Events

Date Code Title Description
ST Notification of lapse