FR2470976A1 - Antennes blindees a boucles equilibrees pour systemes electroniques de securite - Google Patents
Antennes blindees a boucles equilibrees pour systemes electroniques de securiteInfo
- Publication number
- FR2470976A1 FR2470976A1 FR8024264A FR8024264A FR2470976A1 FR 2470976 A1 FR2470976 A1 FR 2470976A1 FR 8024264 A FR8024264 A FR 8024264A FR 8024264 A FR8024264 A FR 8024264A FR 2470976 A1 FR2470976 A1 FR 2470976A1
- Authority
- FR
- France
- Prior art keywords
- loops
- antenna
- twist
- antennas
- armored
- 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
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
- G08B13/2468—Antenna in system and the related signal processing
- G08B13/2471—Antenna signal processing by receiver or emitter
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
- G08B13/2468—Antenna in system and the related signal processing
- G08B13/2474—Antenna or antenna activator geometry, arrangement or layout
-
- 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
- H01Q7/04—Screened antennas
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
UNE ANTENNE D'EMISSION ET UNE ANTENNE DE RECEPTION FONT PARTIE D'UN SYSTEME ELECTRONIQUE DE SECURITE, AU MOINS UNE DES ANTENNES COMPRENANT DEUX BOUCLES OU DAVANTAGE QUI SONT REUNIES PAR UNE TORSADE ET QUI SONT SITUEES DANS UN PLAN COMMUN, EN ETANT TOURNEES DE 180 LES UNES PAR RAPPORT AUX AUTRES DE MANIERE A ETRE EN OPPOSITION DE PHASES. UN ECRAN OU BLINDAGE CONDUCTEUR 56 ENTOURE CHAQUE ANTENNE FORMEE DE BOUCLES REUNIES PAR UNE TORSADE. CE BLINDAGE COMPREND UNE PARTIE 58 FORMANT UNE SPIRE EN COURT-CIRCUIT A LA MASSE ET ENTOURANT LA PERIPHERIE DE L'ANTENNE AINSI QU'UNE PARTIE TRANSVERSALE 60, 62 QUI ENTOURE LES CONDUCTEURS CROISES DE CHAQUE PAIRE DE BOUCLES REUNIES PAR UNE TORSADE, CETTE DERNIERE PARTIE DE L'ECRAN OU BLINDAGE ETANT ISOLEE DE SA PARTIE FORMANT UNE SPIRE EN COURT-CIRCUIT AFIN D'EMPECHER LE COURANT DE CIRCULER DANS CETTE PARTIE TRANSVERSALE. APPLICATION AUX CIRCUITS DE DETECTION DE L'ENLEVEMENT FRAUDULEUX D'OBJETS, PAR EXEMPLE DANS DES MAGASINS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/094,429 US4251808A (en) | 1979-11-15 | 1979-11-15 | Shielded balanced loop antennas for electronic security systems |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2470976A1 true FR2470976A1 (fr) | 1981-06-12 |
FR2470976B1 FR2470976B1 (fr) | 1984-11-23 |
Family
ID=22245143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8024264A Granted FR2470976A1 (fr) | 1979-11-15 | 1980-11-14 | Antennes blindees a boucles equilibrees pour systemes electroniques de securite |
Country Status (13)
Country | Link |
---|---|
US (1) | US4251808A (fr) |
JP (1) | JPS5683000A (fr) |
AU (1) | AU530083B2 (fr) |
CA (1) | CA1148630A (fr) |
DE (1) | DE3043026A1 (fr) |
DK (1) | DK158686C (fr) |
ES (2) | ES496218A0 (fr) |
FR (1) | FR2470976A1 (fr) |
GB (1) | GB2063569B (fr) |
IT (1) | IT1129351B (fr) |
MX (1) | MX148678A (fr) |
SE (1) | SE445498B (fr) |
ZA (1) | ZA806639B (fr) |
Families Citing this family (62)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1138955A (fr) * | 1979-09-14 | 1983-01-04 | Edward R. Fearon | Dispositif antivol pour magasins |
US4373163A (en) * | 1980-07-14 | 1983-02-08 | I.D. Engineering, Inc. | Loop antenna for security systems |
US4384281A (en) * | 1980-10-31 | 1983-05-17 | Knogo Corporation | Theft detection apparatus using saturable magnetic targets |
US4342999A (en) * | 1980-11-25 | 1982-08-03 | Rca Corporation | Loop antenna arrangements for inclusion in a television receiver |
USRE32627E (en) * | 1981-09-10 | 1988-03-22 | Sensormatic Electronics Corporation | Electrical surveillance apparatus with moveable antenna elements |
US4394645A (en) * | 1981-09-10 | 1983-07-19 | Sensormatic Electronics Corporation | Electrical surveillance apparatus with moveable antenna elements |
AU1152083A (en) * | 1983-01-03 | 1984-08-02 | Shin, M. | Anti-shoplifting system |
US4531117A (en) * | 1983-07-05 | 1985-07-23 | Minnesota Mining And Manufacturing Company | Variable frequency RF electronic surveillance system |
US4609911A (en) * | 1983-07-05 | 1986-09-02 | Minnesota Mining And Manufacturing Company | Variable frequency RF electronic surveillance system |
US4509039A (en) * | 1983-07-05 | 1985-04-02 | Minnesota Mining And Manufacturing Company | Shielded, closely spaced transmit-receiver antennas for electronic article surveillance system |
US4642613A (en) * | 1984-03-16 | 1987-02-10 | Knogo Corporation | Electronic theft detection apparatus with responder elements on protected articles |
US4751516A (en) * | 1985-01-10 | 1988-06-14 | Lichtblau G J | Antenna system for magnetic and resonant circuit detection |
AU633247B2 (en) * | 1985-01-10 | 1993-01-28 | Checkpoint Systems, Inc. | Antenna system for magnetic and resonant circuit detection |
US4647910A (en) * | 1985-09-17 | 1987-03-03 | Allied Corporation | Selector for AC magnetic inductive field receiver coils |
US4728938A (en) * | 1986-01-10 | 1988-03-01 | Checkpoint Systems, Inc. | Security tag deactivation system |
US4769631A (en) * | 1986-06-30 | 1988-09-06 | Sensormatic Electronics Corporation | Method, system and apparatus for magnetic surveillance of articles |
JPS63236401A (ja) * | 1987-03-25 | 1988-10-03 | Kokusai Electric Co Ltd | 誘導無線装置用ループアンテナ |
US4779077A (en) * | 1987-04-13 | 1988-10-18 | Lichtblau G J | Continuously armed high reliability pulse train processor |
US4872018A (en) * | 1987-08-31 | 1989-10-03 | Monarch Marking Systems, Inc. | Multiple loop antenna |
US4972198A (en) * | 1987-08-31 | 1990-11-20 | Monarch Marking Systems, Inc. | Multiple loop antenna |
US5121103A (en) * | 1988-07-29 | 1992-06-09 | Knogo Corporation | Load isolated article surveillance system and antenna assembly |
US5103235A (en) * | 1988-12-30 | 1992-04-07 | Checkpoint Systems, Inc. | Antenna structure for an electronic article surveillance system |
US4999641A (en) * | 1989-09-01 | 1991-03-12 | Monarch Marking Systems, Inc. | Magnetic antenna system having independently controllable electrical field shielding and magnetic field balance |
GB9004431D0 (en) * | 1990-02-28 | 1990-04-25 | Scient Generics Ltd | Detection system for security systems |
US5051726A (en) * | 1990-08-14 | 1991-09-24 | Sensormatic Electronics Corporation | Electronic article surveillance system with antenna array for enhanced field falloff |
NL9100397A (nl) * | 1991-03-06 | 1992-10-01 | Nedap Nv | Asymmetrische antenne voor winkeldiefstaldetectiesystemen. |
US5142292A (en) * | 1991-08-05 | 1992-08-25 | Checkpoint Systems, Inc. | Coplanar multiple loop antenna for electronic article surveillance systems |
US5442334A (en) * | 1992-07-20 | 1995-08-15 | Stoplift Corporation | Security system having deactivatable security tag |
US5404147A (en) * | 1992-10-28 | 1995-04-04 | Sensormatic Electronics Corporation | EAS system loop antenna having three loops of different area |
US5373301A (en) * | 1993-01-04 | 1994-12-13 | Checkpoint Systems, Inc. | Transmit and receive antenna having angled crossover elements |
DE59406653D1 (de) * | 1993-07-13 | 1998-09-17 | Actron Entwicklungs Ag | Antennenvorrichtung |
US5694139A (en) * | 1994-06-28 | 1997-12-02 | Sony Corporation | Short-distance communication antenna and methods of manufacturing and using the short-distance communication antenna |
EP0703637A1 (fr) | 1994-09-23 | 1996-03-27 | Actron Entwicklungs AG | Antenne pour un système électronique de surveillance |
WO1996038877A1 (fr) * | 1995-05-30 | 1996-12-05 | Sensormatic Electronics Corporation | Configuration d'antennes d'un systeme electronique de surveillance d'articles pour ameliorer la repartition de l'intensite du champ d'interrogation |
US5602556A (en) * | 1995-06-07 | 1997-02-11 | Check Point Systems, Inc. | Transmit and receive loop antenna |
US5825335A (en) * | 1995-10-23 | 1998-10-20 | Kubota Corporation | Sheet antenna apparatus |
US5653192A (en) * | 1996-03-06 | 1997-08-05 | Alfa Laval Agri Inc. | Livestock identification apparatus |
CA2251326C (fr) * | 1996-04-10 | 2003-06-17 | Sentry Technology Corporation | Systeme electronique de surveillance d'articles |
US5914692A (en) * | 1997-01-14 | 1999-06-22 | Checkpoint Systems, Inc. | Multiple loop antenna with crossover element having a pair of spaced, parallel conductors for electrically connecting the multiple loops |
DE19732254A1 (de) * | 1997-07-26 | 1999-02-11 | Kaba Benzing Gmbh | Vorrichtung zur Übermittlung magnetischer Signale mittels einer Leiterplatte |
US6611783B2 (en) | 2000-01-07 | 2003-08-26 | Nocwatch, Inc. | Attitude indicator and activity monitoring device |
EP1158601A1 (fr) * | 2000-05-15 | 2001-11-28 | Häni Prolectron Ag | Dispositif de support avec antenne à sensibilité réduite |
US7030750B2 (en) | 2002-07-16 | 2006-04-18 | Bert Taeho Lee | Detachable entrance and exit gate with a combined commodity burglarproofing and small arms detecting system |
US6900727B2 (en) | 2002-07-16 | 2005-05-31 | Bert Taeho Lee | Weapon detector system |
KR200298223Y1 (ko) * | 2002-09-11 | 2002-12-16 | 태호 리 버트 | 총기류 탐지 겸용 상품도난 방지장치의 출입게이트 구조 |
US20040102870A1 (en) * | 2002-11-26 | 2004-05-27 | Andersen Scott Paul | RFID enabled paper rolls and system and method for tracking inventory |
ATE394765T1 (de) | 2004-02-19 | 2008-05-15 | Koninkl Philips Electronics Nv | Verfahren und vorrichtung zum übermitteln des vorliegens einer notsituation, ohne die quelle der übermittlung eindeutig zu identifizieren |
US7591415B2 (en) * | 2004-09-28 | 2009-09-22 | 3M Innovative Properties Company | Passport reader for processing a passport having an RFID element |
US20070252001A1 (en) * | 2006-04-25 | 2007-11-01 | Kail Kevin J | Access control system with RFID and biometric facial recognition |
NZ591383A (en) | 2008-09-04 | 2013-08-30 | Allflex Usa Inc | Combination full-duplex and half-duplex electronic identification tag |
US8493185B2 (en) * | 2009-10-09 | 2013-07-23 | Aleis Pty Ltd | Radio frequency identification reader antenna having a dynamically adjustable Q-factor |
NZ599877A (en) * | 2009-10-09 | 2014-03-28 | Allflex Usa Inc | Hdx demodulator |
CA2783571C (fr) * | 2009-11-04 | 2018-01-09 | Allflex Usa, Inc. | Annulation de signal par antenne d'emission/reception a boucles multiples pour lecteur d'etiquettes radio-identification |
US20120139730A1 (en) * | 2010-12-03 | 2012-06-07 | Metrologic Instruments, Inc. | Electronic article surveillance system |
WO2012149025A1 (fr) * | 2011-04-25 | 2012-11-01 | Conocophillips Company | Reconfiguration catalytique à fréquence radio in situ |
US9671478B2 (en) * | 2011-07-22 | 2017-06-06 | Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. | Antenna and antenna arrangement for magnetic resonance applications |
JP2014533994A (ja) | 2011-10-11 | 2014-12-18 | センセオニクス,インコーポレーテッド | 電気力学的場強度誘起システム |
US9577349B2 (en) | 2015-06-29 | 2017-02-21 | Near Field Magnetics, Inc. | Near-field magnetic communication antenna |
DE102017105649A1 (de) * | 2017-03-16 | 2018-09-20 | Bundesdruckerei Gmbh | RFID-Lesegerät und Verfahren zu seiner Herstellung |
US11277029B2 (en) | 2017-05-26 | 2022-03-15 | Nucurrent, Inc. | Multi coil array for wireless energy transfer with flexible device orientation |
US11283303B2 (en) * | 2020-07-24 | 2022-03-22 | Nucurrent, Inc. | Area-apportioned wireless power antenna for maximized charging volume |
US11695302B2 (en) | 2021-02-01 | 2023-07-04 | Nucurrent, Inc. | Segmented shielding for wide area wireless power transmitter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB419783A (en) * | 1933-02-02 | 1934-11-19 | Marconi Wireless Telegraph Co | Improvements in and relating to wireless receiving apparatus |
GB586085A (en) * | 1943-11-15 | 1947-03-06 | Standard Telephones Cables Ltd | Shielded loop antenna |
GB2014796A (en) * | 1978-02-17 | 1979-08-30 | Lichtblau G J | Antenna system for electronic security installation |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4327094Y1 (fr) * | 1964-02-25 | 1968-11-09 | ||
US3863244A (en) * | 1972-06-14 | 1975-01-28 | Lichtblau G J | Electronic security system having improved noise discrimination |
US3810147A (en) * | 1971-12-30 | 1974-05-07 | G Lichtblau | Electronic security system |
US3967161A (en) * | 1972-06-14 | 1976-06-29 | Lichtblau G J | A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination |
US3973263A (en) * | 1973-04-20 | 1976-08-03 | The United States Of America As Represented By The Secretary Of The Navy | Sensitivity improvement of spaced-loop antenna by capacitive gap loading |
JPS5046062A (fr) * | 1973-08-28 | 1975-04-24 | ||
JPS5226879A (en) * | 1975-08-26 | 1977-02-28 | Nippon Telegr & Teleph Corp <Ntt> | Method of measuring phase constants in waveguides |
US4260990A (en) * | 1979-11-08 | 1981-04-07 | Lichtblau G J | Asymmetrical antennas for use in electronic security systems |
-
1979
- 1979-11-15 US US06/094,429 patent/US4251808A/en not_active Expired - Lifetime
-
1980
- 1980-10-06 AU AU62989/80A patent/AU530083B2/en not_active Ceased
- 1980-10-10 CA CA000362129A patent/CA1148630A/fr not_active Expired
- 1980-10-23 ES ES496218A patent/ES496218A0/es active Granted
- 1980-10-29 ZA ZA00806639A patent/ZA806639B/xx unknown
- 1980-10-30 IT IT68658/80A patent/IT1129351B/it active
- 1980-11-11 MX MX184713A patent/MX148678A/es unknown
- 1980-11-12 JP JP15834080A patent/JPS5683000A/ja active Granted
- 1980-11-14 SE SE8007986A patent/SE445498B/sv not_active IP Right Cessation
- 1980-11-14 DK DK489380A patent/DK158686C/da active
- 1980-11-14 FR FR8024264A patent/FR2470976A1/fr active Granted
- 1980-11-14 DE DE19803043026 patent/DE3043026A1/de active Granted
- 1980-11-14 GB GB8036676A patent/GB2063569B/en not_active Expired
-
1981
- 1981-11-16 ES ES507188A patent/ES8302369A1/es not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB419783A (en) * | 1933-02-02 | 1934-11-19 | Marconi Wireless Telegraph Co | Improvements in and relating to wireless receiving apparatus |
GB586085A (en) * | 1943-11-15 | 1947-03-06 | Standard Telephones Cables Ltd | Shielded loop antenna |
GB2014796A (en) * | 1978-02-17 | 1979-08-30 | Lichtblau G J | Antenna system for electronic security installation |
Also Published As
Publication number | Publication date |
---|---|
ES507188A0 (es) | 1982-12-16 |
JPH0230553B2 (fr) | 1990-07-06 |
FR2470976B1 (fr) | 1984-11-23 |
DK158686C (da) | 1991-02-25 |
ES8302369A1 (es) | 1982-12-16 |
MX148678A (es) | 1983-05-27 |
AU530083B2 (en) | 1983-06-30 |
SE445498B (sv) | 1986-06-23 |
DE3043026C2 (fr) | 1990-02-22 |
DK158686B (da) | 1990-07-02 |
ES8202958A1 (es) | 1982-02-16 |
SE8007986L (sv) | 1981-05-16 |
JPS5683000A (en) | 1981-07-07 |
CA1148630A (fr) | 1983-06-21 |
DK489380A (da) | 1981-05-16 |
GB2063569B (en) | 1983-06-22 |
ZA806639B (en) | 1981-11-25 |
IT1129351B (it) | 1986-06-04 |
US4251808A (en) | 1981-02-17 |
AU6298980A (en) | 1981-06-04 |
GB2063569A (en) | 1981-06-03 |
ES496218A0 (es) | 1982-02-16 |
IT8068658A0 (it) | 1980-10-30 |
DE3043026A1 (de) | 1981-05-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2470976A1 (fr) | Antennes blindees a boucles equilibrees pour systemes electroniques de securite | |
FR2390026A1 (fr) | ||
GB1145507A (en) | Dipole aerial | |
Nabighian | Quasi-static transient response of a conducting permeable sphere in a dipolar field | |
US2419480A (en) | Loop antenna shield | |
FR2404977A1 (fr) | Circuit de traitement d'un signal de television | |
GB1258656A (fr) | ||
GB419783A (en) | Improvements in and relating to wireless receiving apparatus | |
Warner | CA II emission in the spectrum of Canopus | |
FR2386156A1 (fr) | Lentille dielectrique | |
DE727938C (de) | Rahmenantenne | |
US2608658A (en) | Television antenna construction | |
US2005779A (en) | Directive aerial system | |
GB1035592A (en) | An improved printed circuit panel and a method of making same | |
US2201807A (en) | Direction finder loop | |
GB1007164A (en) | Copper base alloys and a method of treating them to improve their machinability | |
SU63908A1 (ru) | Радиопеленгатор | |
ALABIN et al. | The use of space and aerial imagery in metallogeny/with the Altai-Sayan fold belt considered as an example | |
Cox et al. | HB 1021, Appropriation to Assess Effects of Electromagnetic Radiation at Lualualei-Statement for House Committee on Health Public Hearing, 24 February 1983 | |
GB556324A (en) | Improvements in or relating to antenna systems | |
DE551696C (de) | Richtantenne, insbesondere fuer Schiffspeiler | |
GB1113956A (en) | Radio navigation system | |
DE1756033C1 (de) | Unterwasserkampfmittel,insbesondere Seemine,mit aeusserlich angebrachten elektrischen Spulenwicklungen zum drahtlosen Empfang von Stromliniensignalen | |
DE429480C (de) | Einrichtung zur Beseitigung von Stoerungen bei drahtloser Nachrichtenuebermittlung | |
Savage | Functional and scientific aspects of accounting |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |