ATE37453T1 - ELECTRONIC GOODS MONITORING SYSTEM. - Google Patents

ELECTRONIC GOODS MONITORING SYSTEM.

Info

Publication number
ATE37453T1
ATE37453T1 AT84108951T AT84108951T ATE37453T1 AT E37453 T1 ATE37453 T1 AT E37453T1 AT 84108951 T AT84108951 T AT 84108951T AT 84108951 T AT84108951 T AT 84108951T AT E37453 T1 ATE37453 T1 AT E37453T1
Authority
AT
Austria
Prior art keywords
ground plane
patch
metal
patches
spacing
Prior art date
Application number
AT84108951T
Other languages
German (de)
Inventor
Samuel Sensiper
Harold B Williams
Philip Daniel Fancher
Original Assignee
Ici America 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 Ici America Inc filed Critical Ici America Inc
Application granted granted Critical
Publication of ATE37453T1 publication Critical patent/ATE37453T1/en

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
    • G08B13/2405—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 characterised by the tag technology used
    • G08B13/2422—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 characterised by the tag technology used using acoustic or microwave tags
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Burglar Alarm Systems (AREA)
  • Waveguide Aerials (AREA)

Abstract

An electronic article surveillance system for microwave frequencies (500 MHz and higher) has microstrip antenna arrays each array comprising a dielectric substrate having a plurality of metal patches, spaced apart in the normal direction of travel through a surveillance zone, on one side and a metal ground plane on the other side. Each metal patch and the adjacent portion of the ground plane together form a cavity resonator which resonates at a desired transmitter or return signal frequency and thereby form a signal radiating or receiving structure. The patch size, patch to ground plane spacing, and spacing between patches are determined by the desired resonant frequency.
AT84108951T 1983-08-02 1984-07-27 ELECTRONIC GOODS MONITORING SYSTEM. ATE37453T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51956683A 1983-08-02 1983-08-02
EP84108951A EP0133317B1 (en) 1983-08-02 1984-07-27 Electronic article surveillance system

Publications (1)

Publication Number Publication Date
ATE37453T1 true ATE37453T1 (en) 1988-10-15

Family

ID=24068862

Family Applications (1)

Application Number Title Priority Date Filing Date
AT84108951T ATE37453T1 (en) 1983-08-02 1984-07-27 ELECTRONIC GOODS MONITORING SYSTEM.

Country Status (9)

Country Link
EP (1) EP0133317B1 (en)
JP (1) JPS60100295A (en)
AT (1) ATE37453T1 (en)
AU (1) AU573602B2 (en)
BR (1) BR8403801A (en)
CA (1) CA1236542A (en)
DE (1) DE3474224D1 (en)
MX (1) MX156403A (en)
NZ (1) NZ209069A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647910A (en) * 1985-09-17 1987-03-03 Allied Corporation Selector for AC magnetic inductive field receiver coils
US6005519A (en) * 1996-09-04 1999-12-21 3 Com Corporation Tunable microstrip antenna and method for tuning the same
US8226003B2 (en) 2006-04-27 2012-07-24 Sirit Inc. Adjusting parameters associated with leakage signals
US8248212B2 (en) 2007-05-24 2012-08-21 Sirit Inc. Pipelining processes in a RF reader
US8427316B2 (en) 2008-03-20 2013-04-23 3M Innovative Properties Company Detecting tampered with radio frequency identification tags
US8446256B2 (en) 2008-05-19 2013-05-21 Sirit Technologies Inc. Multiplexing radio frequency signals
US8169312B2 (en) 2009-01-09 2012-05-01 Sirit Inc. Determining speeds of radio frequency tags
US8416079B2 (en) 2009-06-02 2013-04-09 3M Innovative Properties Company Switching radio frequency identification (RFID) tags
US10062025B2 (en) 2012-03-09 2018-08-28 Neology, Inc. Switchable RFID tag
US10367259B2 (en) 2017-01-12 2019-07-30 Arris Enterprises Llc Antenna with enhanced azimuth gain

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO126975B (en) * 1967-03-30 1973-04-16 John Welsh
US3680136A (en) * 1971-10-20 1972-07-25 Us Navy Current sheet antenna
US3895368A (en) * 1972-08-09 1975-07-15 Sensormatic Electronics Corp Surveillance system and method utilizing both electrostatic and electromagnetic fields
US3921177A (en) * 1973-04-17 1975-11-18 Ball Brothers Res Corp Microstrip antenna structures and arrays
GB1604220A (en) * 1978-04-24 1981-12-02 Parmeko Ltd Detection systems
CA1190970A (en) * 1980-10-09 1985-07-23 Harold B. Williams Dual frequency anti-theft system
US4386357A (en) * 1981-05-21 1983-05-31 Martin Marietta Corporation Patch antenna having tuning means for improved performance

Also Published As

Publication number Publication date
JPS60100295A (en) 1985-06-04
NZ209069A (en) 1988-03-30
CA1236542A (en) 1988-05-10
AU3122084A (en) 1985-02-07
MX156403A (en) 1988-08-18
EP0133317A3 (en) 1985-03-27
DE3474224D1 (en) 1988-10-27
EP0133317B1 (en) 1988-09-21
BR8403801A (en) 1985-07-09
EP0133317A2 (en) 1985-02-20
AU573602B2 (en) 1988-06-16

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee