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GB2326529B - Radio frequency antenna - Google Patents

Radio frequency antenna

Info

Publication number
GB2326529B
GB2326529B GB9711384A GB9711384A GB2326529B GB 2326529 B GB2326529 B GB 2326529B GB 9711384 A GB9711384 A GB 9711384A GB 9711384 A GB9711384 A GB 9711384A GB 2326529 B GB2326529 B GB 2326529B
Authority
GB
United Kingdom
Prior art keywords
radio frequency
frequency antenna
antenna
radio
frequency
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
GB9711384A
Other versions
GB9711384D0 (en
GB2326529A (en
Inventor
Bernard John Regan
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.)
Identec Ltd
Original Assignee
Identec Ltd
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 Identec Ltd filed Critical Identec Ltd
Priority to GB9711384A priority Critical patent/GB2326529B/en
Publication of GB9711384D0 publication Critical patent/GB9711384D0/en
Publication of GB2326529A publication Critical patent/GB2326529A/en
Application granted granted Critical
Publication of GB2326529B publication Critical patent/GB2326529B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07766—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement
    • G06K19/07767—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
    • 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
    • G08B13/2428—Tag details
    • G08B13/2431—Tag circuit details
    • 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
    • G08B13/2477—Antenna or antenna activator circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • 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
    • H01Q7/06—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 core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
GB9711384A 1997-06-04 1997-06-04 Radio frequency antenna Expired - Fee Related GB2326529B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9711384A GB2326529B (en) 1997-06-04 1997-06-04 Radio frequency antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9711384A GB2326529B (en) 1997-06-04 1997-06-04 Radio frequency antenna

Publications (3)

Publication Number Publication Date
GB9711384D0 GB9711384D0 (en) 1997-07-30
GB2326529A GB2326529A (en) 1998-12-23
GB2326529B true GB2326529B (en) 2001-12-05

Family

ID=10813455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9711384A Expired - Fee Related GB2326529B (en) 1997-06-04 1997-06-04 Radio frequency antenna

Country Status (1)

Country Link
GB (1) GB2326529B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6317027B1 (en) * 1999-01-12 2001-11-13 Randy Watkins Auto-tunning scanning proximity reader
GB9915595D0 (en) * 1999-07-02 1999-09-01 Sadler Robin W Identification apparatus for reading moving tags in passageways
DE10029673A1 (en) * 2000-06-23 2002-01-10 Anatoli Stobbe Resonant circuit arrangement
KR100860281B1 (en) * 2000-08-04 2008-09-25 미츠비시 마테리알 가부시키가이샤 Antenna
JP4628611B2 (en) * 2000-10-27 2011-02-09 三菱マテリアル株式会社 antenna
JP3774136B2 (en) * 2000-10-31 2006-05-10 三菱マテリアル株式会社 Antenna and radio wave transmission / reception device using the same
US20030076093A1 (en) * 2001-10-18 2003-04-24 Microchip Technology Incorporated Reducing orientation directivity and improving operating distance of magnetic sensor coils in a magnetic field
WO2004015808A2 (en) * 2002-08-08 2004-02-19 Burrus, Xavier Array of modular transmission antennas for an rf identification system
DE10343546A1 (en) * 2003-09-19 2005-09-01 Giesecke & Devrient Gmbh Sheet document with an electrical circuit
EP1938424B1 (en) 2005-09-20 2014-03-05 Allflex Australia Pty Limited Portal antenna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300183A (en) * 1980-03-27 1981-11-10 Richardson Robert H Method and apparatus for generating alternating magnetic fields to produce harmonic signals from a metallic strip
US4539558A (en) * 1981-11-24 1985-09-03 Shin International, Inc. Antitheft system
WO1986001924A1 (en) * 1984-09-17 1986-03-27 Progressive Dynamics, Inc. Method and apparatus for producing electromagnetic surveillance fields

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300183A (en) * 1980-03-27 1981-11-10 Richardson Robert H Method and apparatus for generating alternating magnetic fields to produce harmonic signals from a metallic strip
US4539558A (en) * 1981-11-24 1985-09-03 Shin International, Inc. Antitheft system
WO1986001924A1 (en) * 1984-09-17 1986-03-27 Progressive Dynamics, Inc. Method and apparatus for producing electromagnetic surveillance fields

Also Published As

Publication number Publication date
GB9711384D0 (en) 1997-07-30
GB2326529A (en) 1998-12-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070604