摘要
超高频RFID系统受环境,尤其是金属的影响很大。通过理论分析,结合实验测试和仿真研究了金属对RFID系统的影响。金属对读写器的场合有反射和屏蔽的作用,反射会引起读写空洞,屏蔽会使读取率降低,但并不是完全无法读取。标签放置在金属附近会很难接收到读写器的能量,同时标签天线的阻抗和增益都会改变,引起失谐。
The UHF RFID system is effected by the environment, especially metal. Theory analyzing, test experiment and simulation are used to study the effect of metal on RFID system. The effect of metal on the reader could be devided into reflecting and shielding. Reflecting provides reading holes and shielding would reduce the reading rate but not to zero. The tag would be hard to receive energy from the reader when put near metal. The antenna of the tag would get changed in both resistance and radiation pattern and becomes detuned.
出处
《科学技术与工程》
2008年第18期5242-5245,共4页
Science Technology and Engineering
