一种RFID读写器天线的设计与分析  

Design and Analysis of an RFID Reader Antenna

作　　者：李健 张谢馥 罗韦 蔡鹏霄 LI Jian;ZHANG Xiefu;LUO Wei;CAI Pengxiao(Guizhou Education University,Guiyang Guizhou 550018)

机构地区：[1]贵州师范学院

出　　处：《河南科技》2019年第22期37-39,共3页Henan Science and Technology

基　　金：贵州省教育厅项目“面向低成本物联网应用的多频RFID天线技术的研究”（黔教合KY字【2017】213）;贵州省教育厅项目“面向低成本物联网应用的智能RFID技术研究”（黔教合KY字【2018】266）

摘　　要：本文设计了一款中心频率工作于2.45GHz 的RFID(Radio Frequency Identification,RFID)读写器天线。该天线是对矩形微带天线的改进,通过对矩形贴片进行镂空,以原点处为中心,分别镂空六个尺寸相等的小矩形,以改变矩形贴片表面电流分布,使其具有更强的电磁辐射特性。此外,本文还使用HFSS软件进行仿真验证。结果表明,该天线回波损耗在2.43~2.50GHz频段内低于-10dB,在中心频率2.45GHz处回波损耗约为-21dB,改进后的矩形微带贴片中心面磁感应强度平均高于原矩形微带天线约10A/m。In this paper, an reader antenna applied to the RFID (Radio Frequency Identification) system with a center frequency operating at 2.45 GHz was designed. The antenna is based on a rectangular microstrip antenna which is hollowed out centered on the origin with six small rectangles of equal size that is to change the surface current distri. bution of the rectangular patch aiming to provide stronger electromagnetic radiation characteristics. In this paper, HFSS software was used for simulation. The results shows that the return loss of the antenna is lower than -10dB in the frequency range of 2.43~2.50GHz, and the return loss is about -21dB at the center frequency of 2.45GHz. The magnetic induction intensity of the center plane of the improved rectangular microstrip patch is about 10 A/m higher than that of the original rectangular microstrip antenna.

关 键 词：矩形微带天线 回波损耗 HFSS软件 磁感应强度 

分 类 号：TN409[电子电信—微电子学与固体电子学]