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Apparatus and method for radio frequency transponder with improved read distance 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G08B-013/14
출원번호 US-0277271 (1999-03-26)
발명자 / 주소
  • Duan Dah-Weih
출원인 / 주소
  • Intermec Ip Corp.
대리인 / 주소
    O'Melveny & Myers LLP
인용정보 피인용 횟수 : 81  인용 특허 : 11

초록 ▼

A radio frequency identification transponder (RFID tag) in accordance with the principles of the present includes a tag antenna having a gain and an input impedance. The tag also includes RFID circuitry, which may be in the form of an RFID tag integrated circuit, the RFID circuitry also being charac

대표청구항 ▼

[ What is claimed is:] [1.] A radio frequency identification transponder (RFID tag) comprising:a tag antenna having a gain G.sub.a and an impedance Z.sub.a ; and radio frequency identification circuitry responsive to electromagnetic signals received at the tag antenna, the circuitry having an input

이 특허에 인용된 특허 (11)

  1. Ghaem Sanjar (Palatine IL) Olson William L. (Lindenhurst IL) Istvan Rudyard L. (Winnetka IL) Lauro George L. (Lake Zurich IL), Battery-powered RF tags and apparatus for manufacturing the same.
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  2. Everett David F. (Gambrills MD) Buck Daniel C. (Hanover MD), Dual resonant antenna circuit for RF tags.
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  8. Belcher Donald K. ; Boyd Robert W. ; Wohl Michael A., Radio geo-location system with advanced first received wavefront arrival determination.
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  11. Duan Dah-Weih ; Friedman Daniel Joseph ; Heinrich Harley Kent, Wire antenna with optimized impedance for connecting to a circuit.
    상세보기

이 특허를 인용한 특허 (81)

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