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首页> 外文会议>Wireless Sensing, Local Positioning, and RFID, 2009. IMWS 2009 >Evaluation of passive carrier-suppression techniques for UHF RFID systems
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Evaluation of passive carrier-suppression techniques for UHF RFID systems

机译：超高频RFID系统的无源载波抑制技术评估

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摘要

In this paper we investigate the signal that is returned from an interrogator antenna when communicating with a radio-frequency identification (RFID) transponder at a carrier frequency of 866 MHz. This signal contains the response of the transponder and also a part of the carrier signal that is leaking into the receive path. Depending on the type of interrogator antenna configuration used, both signal components are expected to vary widely in terms of power. We perform measurements with patch antennas that radiate linearly and circularly polarized waves in various configurations. Furthermore, passive methods that minimize the leaking carrier are explored and compared. Results are obtained for transponder positions covering the transition region between near- and farfield. It is found that separated transmitter and receiver antennas offer highest carrier-suppression and thus require the least effort for the receiver.
机译：在本文中，我们研究了当以866 MHz的载波频率与射频识别（RFID）应答器进行通信时，询问器天线返回的信号。该信号包含应答器的响应以及一部分泄漏到接收路径中的载波信号。取决于所使用的询问器天线配置的类型，两个信号分量的功率预计会发生很大变化。我们使用贴片天线执行测量，这些贴片天线会辐射出各种配置的线性和圆极化波。此外，探索并比较了使泄漏载体最小化的被动方法。获得覆盖近场和远场之间过渡区域的应答器位置的结果。发现分离的发射器和接收器天线提供了最高的载波抑制，因此对接收器的需求最少。

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