声表面波射频识别的阅读器微带天线小型化

摘要

Aiming at the handheld reader of surface acoustic wave radio frequency identification system which works at 433MHz,a microstripantenna which is based on the theory of microstripantenna and the technology of meandering with a slotted bottom was designed.Firstly,according to the requirements of system,the initialsize of the microstripantenna was selected by calculating,analyzing and comparing;Next,an antennamodel was setup by HFSS(High Frequency Structure Simulator) software,and the finalsize was determined after simulating and parameters optimization.After that,the handmadeantenna was tested by network analyzer,and the actual performance is consistent with the simulation.Finally,through the test of antenna with the identification,the practicability of this antenna is verified.%为实现工作频率433 MHz的声表面波射频识别系统阅读器手持功能,基于微带天线理论,采用曲流技术这一天线小型化方法,设计了一种用作阅读器天线的底面开槽微带天线.参照系统要求,通过计算、分析和对比,选取了微带天线的初始尺寸;利用电磁仿真软件HFSS对天线进行了建模仿真与参数优化,确定了天线各参数最终值;手工制作天线并用网络分析仪对天线进行了测试,天线实际性能与仿真基本一致;结合声表面波射频识别系统对天线进行了测试,验证了该天线的实用性.