应用于 GSM1800屏蔽的小型化频率选择表面设计

摘要

针对GSM1800移动通信的信号屏蔽问题，基于分形设计思想提出一种小型化频率选择表面（ FSS ），将传统方形单元的直边以分形的规则向内进行弯折，增加曲折线长度，从而增加谐振长度。利用CST软件进行仿真，结果表明该FSS的单元尺寸为工作波长的1／15，对于TE和TM极化电磁波，当入射角度从0°到75°时，FSS都具有良好的频率响应特性。%The paper proposes a novel miniaturized frequency selective surface ( FSS) with high stability based on the quasi fractal structure for GSM 1800 shield.In order to lengthen the resonant length , the given FSS structure is obtained by bending the edge of traditional square loop aperture into the inner space to lengthen the meander length based on the fractal rule .Simulation re-sults by CST Microwave Studio show that the size of proposed FSS unit cell isλ/15 .Moreover , the transmission performance is sta-ble as the incident angles increase from 0°to 75°for TE and TM polarizations.