三频段高稳定辐射分裂生长式分形微带天线

摘要

针对移动通信及射频识别等多应用频段覆盖的需求,提出一种新型分裂生长式分形结构,利用π型四边形雪花结构进行分裂生长式迭代算法,实现了高度集成的等效复合辐射边,研制了一款分裂生长式分形微带天线,能够同时覆盖移动通信的900 MHz频段、1.9 GHz频段和射频识别的2.45 GHz频段,3个工作频带的回波损耗最小值都低于-20 dB,工作带宽都大于0.2 GHz,天线在3个工作频段都具有高稳定辐射特性.该天线成功实现了移动通信系统和射频识别多体系兼容,有望用于通信及远程身份识别及支付体系.%In view of the requirements of multiple frequency bands working systems,such as mobile communication system and the Radio Frequency Identification(RFID) system,a new divisive growing type fractal structure is proposed.The PI type quadrilateral snowflake structure is used to going on divisive growing type fractal iterative calculation,with which implements a highly integrated equivalent composite radiation edge,and designed a divisive growing type fractal microstrip antenna.This antenna can cover the 900 MHz frequency band and 1.9 GHz frequency band of mobile communication system,2.45 GHz frequency band of the RFID system at the same time.The return loss minimum values of three working frequency bands are all below-20 dB,and the working bandwidth of three working frequency bands are all better than 0.2 GHz.The radiation characteristics of antenna are all have high stability in three working frequency bands.This novel antenna successfully realizes the compatible of mobile communication system and the RFID system,and ready for appalling to mobile communication and remote identification and payment system.