CA2350217C - Multiple loop antenna - Google Patents

Multiple loop antenna Download PDF

Info

Publication number
CA2350217C
CA2350217C CA002350217A CA2350217A CA2350217C CA 2350217 C CA2350217 C CA 2350217C CA 002350217 A CA002350217 A CA 002350217A CA 2350217 A CA2350217 A CA 2350217A CA 2350217 C CA2350217 C CA 2350217C
Authority
CA
Canada
Prior art keywords
antenna
loop elements
loop
transmit
receive
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
CA002350217A
Other languages
English (en)
French (fr)
Other versions
CA2350217A1 (en
Inventor
Wen-Liang Wu
Alan Dutcher
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.)
Checkpoint Systems Inc
Original Assignee
Checkpoint Systems Inc
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 Checkpoint Systems Inc filed Critical Checkpoint Systems Inc
Priority claimed from PCT/US1998/024182 external-priority patent/WO2000030214A1/en
Publication of CA2350217A1 publication Critical patent/CA2350217A1/en
Application granted granted Critical
Publication of CA2350217C publication Critical patent/CA2350217C/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
    • 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
    • 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

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)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Near-Field Transmission Systems (AREA)
  • Burglar Alarm Systems (AREA)
  • Aerials With Secondary Devices (AREA)
  • Support Of Aerials (AREA)
CA002350217A 1998-11-12 1998-11-12 Multiple loop antenna Expired - Fee Related CA2350217C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/024182 WO2000030214A1 (en) 1997-05-28 1998-11-12 Multiple loop antenna

Publications (2)

Publication Number Publication Date
CA2350217A1 CA2350217A1 (en) 2000-05-25
CA2350217C true CA2350217C (en) 2006-04-04

Family

ID=22268290

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002350217A Expired - Fee Related CA2350217C (en) 1998-11-12 1998-11-12 Multiple loop antenna

Country Status (6)

Country Link
EP (1) EP1138098A4 (zh)
JP (1) JP2002530910A (zh)
KR (1) KR100605341B1 (zh)
CN (1) CN1123089C (zh)
CA (1) CA2350217C (zh)
IL (1) IL142387A (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101667870A (zh) * 2003-02-27 2010-03-10 奎法克特股份有限公司 用在准静电场的通信中的电极的电极制造方法
JP4772744B2 (ja) * 2007-05-17 2011-09-14 昭和飛行機工業株式会社 非接触給電装置用の信号伝送コイル通信装置
KR101563428B1 (ko) 2014-05-27 2015-10-26 재단법인대구경북과학기술원 근거리 자기장 시스템
WO2016136322A1 (ja) * 2015-02-24 2016-09-01 株式会社村田製作所 アンテナ装置およびｒｆｉｄシステム

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577136A (en) * 1967-08-04 1971-05-04 Security Systems Inc Short-range signaling system
US4135184A (en) * 1977-08-31 1979-01-16 Knogo Corporation Electronic theft detection system for monitoring wide passageways

Also Published As

Publication number Publication date
EP1138098A4 (en) 2005-01-26
KR100605341B1 (ko) 2006-07-28
CA2350217A1 (en) 2000-05-25
EP1138098A1 (en) 2001-10-04
JP2002530910A (ja) 2002-09-17
CN1123089C (zh) 2003-10-01
KR20010106513A (ko) 2001-11-29
CN1322391A (zh) 2001-11-14
IL142387A (en) 2004-06-20
IL142387A0 (en) 2002-03-10

Similar Documents

Publication Publication Date Title
AU753373B2 (en) Multiple loop antenna
AU733732B2 (en) Multiple loop antenna with crossover element having a pair of spaced, parallel conductors for electrically connecting the multiple loops
US5602556A (en) Transmit and receive loop antenna
US5373301A (en) Transmit and receive antenna having angled crossover elements
EP0615217B1 (en) Electronic article surveillance system with enhanced geometric arrangement
CA2350217C (en) Multiple loop antenna
MXPA97000953A (en) Transmitter and recept tie antenna

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed