Invention Grant
US07936272B2 Dynamic antenna tuning circuit for a radio frequency identification reader
有权
用于射频识别读取器的动态天线调谐电路
- Patent Title: Dynamic antenna tuning circuit for a radio frequency identification reader
- Patent Title (中): 用于射频识别读取器的动态天线调谐电路
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Application No.: US12431879Application Date: 2009-04-29
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Publication No.: US07936272B2Publication Date: 2011-05-03
- Inventor: Robert Stewart
- Applicant: Robert Stewart
- Applicant Address: US TX Dallas-Ft. Worth Airport
- Assignee: Allflex USA, Inc.
- Current Assignee: Allflex USA, Inc.
- Current Assignee Address: US TX Dallas-Ft. Worth Airport
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: G08B13/14
- IPC: G08B13/14
Abstract:
A resonant antenna circuit for a radio frequency identification (RFID) reader generates an electrical signal for activating a passive identification tag. The identification tag in turn generates a coded electrical signal that is detected by the reader. The electrical characteristics of the resonant circuit are actively and dynamically altered so that the antenna performs more optimally during the transmit and receive intervals.
Public/Granted literature
- US20090206999A1 DYNAMIC ANTENNA TUNING CIRCUIT FOR A RADIO FREQUENCY IDENTIFICATION READER Public/Granted day:2009-08-20
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