超高频RFID读写器天线的设计与仿真  

Design and simulation of ultra-high frequency RFID reader antenna

作　　者：李磊[1] 张昕[1] 李迎松[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2010年第4期61-64,共4页Applied Science and Technology

摘　　要：基于RFID系统对天线的要求,针对单馈电微带天线回波损耗和轴比之间的矛盾,利用理论计算和Ansoft HFSS软件仿真优化的方法设计出了一种用于RFID读写器的新型超高频圆极化微带天线.该天线采用背馈的方法,相对于侧馈有效地减小了天线的尺寸.为实现良好的圆极化性能,该天线利用空气作为介质层.并且采用非对称矩形切角,相对于当前普遍采用的对称等腰直角三角形切角更容易加工和调整.经过仿真分析得出了各种参数的曲线图,验证了该天线的优越性能.Based on the requirements of the RFID （radio frequency identity） systems antenna, a new ultra-high frequency circularly polarized microstrip antenna using in RFID reader was designed aiming at the contradiction between return loss and axial ratio of single-fed mierostrip antenna by theoretical calculations and Ansoft HFSS for simulation and optimization. By using the back-feeding pattern, the antenna effectively reduces the size of the antenna relative to side-feeding. To achieve good circular polarization performance, the antenna uses air as the dielectric layer. Relative to the current widely used symmetric isosceles triangle corner truncated design, the non-symmetrical rectangular corner truncated design is easier for processing and adjustment. Through simulation analysis, various parameter curves are obtained to verify the superior performance of the antenna.

关 键 词：RFID读写器 微带天线 超高频 圆极化 

分 类 号：TN822.4[电子电信—信息与通信工程]