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公开(公告)号:US20070182558A1
公开(公告)日:2007-08-09
申请号:US11513667
申请日:2006-08-31
申请人: Sean Loving , Sayan Chakraborty , Tim Enwall , Christopher Chan , Lee Snook , Rohit Majhi
发明人: Sean Loving , Sayan Chakraborty , Tim Enwall , Christopher Chan , Lee Snook , Rohit Majhi
CPC分类号: H04B1/24 , G06K7/0008 , G06K7/10356 , H04B1/22 , H04B1/58
摘要: A phase shifting diode detector system for an RFID reader. Quarter-wave delay circuitry is coupled between a forward transmitted signal of the RFID reader applied at a first end of the delay circuitry, and a reflected signal returning from an RFID tag applied at a second end of the delay circuitry. The system includes a pair of diode detector bridges, each comprising a series-coupled diode pair configured such that diode polarities in each bridge are reversed relative to the output thereof, to produce opposite rectified signal output polarities. An input to each of the bridges is capacitively coupled, from the junction between each said diode pair, to a respective opposite end of the delay circuitry.
摘要翻译: 一种用于RFID读取器的相移二极管检测器系统。 四分之一波延迟电路耦合在延迟电路的第一端处应用的RFID读取器的前向发射信号和从在延迟电路的第二端施加的RFID标签返回的反射信号。 该系统包括一对二极管检测器桥,每个二极管检测器桥包括串联耦合二极管对,其配置为使得每个桥中的二极管极性相对于其输出反转,以产生相反的整流信号输出极性。 每个桥接器的输入端从每个所述二极管对之间的接点电容耦合到延迟电路的相应的相对端。
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公开(公告)号:US07456746B2
公开(公告)日:2008-11-25
申请号:US11513667
申请日:2006-08-31
申请人: Sean T. Loving , Sayan Chakraborty , Tim Enwall , Christopher Chan , Lee Snook , Rohit Majhi
发明人: Sean T. Loving , Sayan Chakraborty , Tim Enwall , Christopher Chan , Lee Snook , Rohit Majhi
IPC分类号: G08B13/14
CPC分类号: H04B1/24 , G06K7/0008 , G06K7/10356 , H04B1/22 , H04B1/58
摘要: A phase shifting diode detector system for an RFID reader. Quarter-wave delay circuitry is coupled between a forward transmitted signal of the RFID reader applied at a first end of the delay circuitry, and a reflected signal returning from an RFID tag applied at a second end of the delay circuitry. The system includes a pair of diode detector bridges, each comprising a series-coupled diode pair configured such that diode polarities in each bridge are reversed relative to the output thereof, to produce opposite rectified signal output polarities. An input to each of the bridges is capacitively coupled, from the junction between each said diode pair, to a respective opposite end of the delay circuitry.
摘要翻译: 一种用于RFID读取器的相移二极管检测器系统。 四分之一波延迟电路耦合在延迟电路的第一端处应用的RFID读取器的前向发射信号和从在延迟电路的第二端施加的RFID标签返回的反射信号。 该系统包括一对二极管检测器桥,每个二极管检测器桥包括串联耦合二极管对,其配置为使得每个桥中的二极管极性相对于其输出反转,以产生相反的整流信号输出极性。 每个桥接器的输入端从每个所述二极管对之间的接点电容耦合到延迟电路的相应的相对端。
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