超高频RFID系统的宽带圆极化微带天线优化设计Optimization design of broadband circularly-polarized microstrip antenna for UHF RFID system
傅世强,钟华华,李婵娟
摘要(Abstract)：
提出一种全球通用超高频RFID读写器终端圆极化天线的优化设计方法。在传统叠层微带天线宽带化的基础上,通过加载中心短路柱和改进T型双馈电功分移相网络扩展天线的轴比带宽,并利用匹配调谐片进一步展宽天线的阻抗带宽,给出天线的设计思路,并进行了电磁仿真优化。最后对天线进行加工试验,测试结果表明在840~960 MHz频带范围内,天线驻波比小于1.5,轴比小于3 dB,增益可达9 dB。所设计的天线已成功应用于超高频四通道读写器终端。
关键词(KeyWords)： 射频识别;微带天线;超高频读写器;圆极化;轴比带宽;天线设计
基金项目(Foundation): 国家自然科学基金(61401056);; 中央高校基本科研业务费专项资金资助(3132016320)~~
作者(Author): 傅世强,钟华华,李婵娟
DOI: 10.16652/j.issn.1004-373x.2018.09.004
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