标识卡唯一性检测装置中定向天线设计

Design of directional antenna of uniqueness detection device of identification card

针对传统标识卡检测装置不能在指定区域有效检卡、存在误识别区域的问题,设计了一种窄带、高增益定向天线。通过改变传统标识卡检测装置全向天线的增益及方向角,将其水平波瓣宽度由180°减小到小于90°,并采用Ansoft HFSS电磁仿真软件对该天线的长度、宽度、矩阵排列方式等参数进行分析及优化,使其具有良好的窄带、定向、高增益特性。实际应用表明,该天线可确保标识卡唯一性检测装置很好地符合AQ 6210—2007及AQ 1048—2007的相关要求。

In view of problems that traditional detection device of identification card cannot detect card effectively at assigned area and has error identification area,a directional antenna with narrow band and high gain was designed.Through changing gain and direction angle of omnidirectional antenna of the traditional detection device of identification card,width of horizontal lobe is reduced from 180° to less than 90°,parameters of length,width and matrix arrangement mode of the antenna are analyzed and optimized by using Ansoft HFSS electromagnetic simulation software,so as to realize good performances of narrow band,direction and high gain.The actual application shows that the antenna can ensure uniqueness detection device of identification card well accord with relative requirements of AQ 6210-2007 and AQ 1048-2007.