一种915MHz印刷偶极子标签天线的分析与设计  

Analysis and Design for a Kind of Printed Dipole Antenna Used at 915MHz

作　　者：宋立众[1] 马宁[1] 吴群[1] 

机构地区：[1]哈尔滨工业大学电子科学与技术博士后科研流动站,哈尔滨150001

出　　处：《微波学报》2008年第6期51-55,64,共6页Journal of Microwaves

摘　　要：射频识别技术由于具有体积小、容量大等优良性能而被广泛应用于很多领域。针对反射调制式RFID系统,介绍了一种基于ISO/IEC18000-6标准应用的RFID印刷偶极子标签天线及其优化设计方案。首先进行了915MHz印刷偶极子天线的结构设计,给出了等效电路模型和具体的设计尺寸和仿真结果;然后使用分支线结构加载的方法进行小型化设计,设计结果为在中心工作频率915MHz处,增益为2.15dBi,电压驻波比小于1.5的工作带宽为78MHz,尺寸减缩幅度达48%以上;最后,在一定的柱面共形半径条件下,对上述印刷偶极子天线进行仿真,结果表明该天线仍能保持较好的工作性能,可以广泛应用于弹体共形等情况。Radio frequency identification （RFID） technique is widely used in many fields because it has a lot of good performances such as small size, large memory space. For the reflection modulation FRID system, a kind of printed dipole antenna based on the ISO/IEC18000-6 standard and its optimum design method is described. Firstly, the structure and size of the printed dipole antenna used at 915MHz are designed; the equivalent circuit model and specific designed size and simulation results are given. Secondly, a branch line structure is used to realize the minimization of the antenna, the gain of the designed antenna is 2.15dBi at 915MHz, the bandwidth was about 78MHz when the voltage standing wave ratio is less than 1.5, the size is reduced more than 48% compared to the original one. Finally, the above printed dipole antennas were simulated under the condition of the cylindrical surface eonformability with some different radius and the results revealed that the performance of the antenna was still acceptable, so it Can be used under some eonformal conditions such as missile surface.

关 键 词：射频识别 印刷偶极子标签 小型化 共形天线 

分 类 号：TN821[电子电信—信息与通信工程]