一种旋绕型频率选择表面的传输特性分析

利用基于矩量法的电磁分析软件Ansoft Designer研究了一种新的旋绕型双方环频率选择表面(new convoluted double square loop frequency selective surface,简称NCDSL FSS)的传输性能.结果表明,该结构对入射电磁波的入射角、极化方式等不灵敏,比经典CDSL FSS受栅瓣影响小;通过调节其凹槽深度,两频带间隔可围绕单元尺寸、阵列周期均相同的传统同心双方环频率选择表面(double square loop frequency selective surface,简称DSL FSS)的频带间隔双向调节,这是CDSL FSS无法做到的;而且NCDSL FSS高频谐振点处的-0.5 dB相对反射带宽也总是比CDSL FSS和DSL FSS的大.因此该结构是一种简单且性能较优的频率选择器件.

Transmission Characteristics of a Convoluted Frequency Selective Surface

Ansoft Designer software package based on Method of Moment is used to analyze a New Convoluted Double Square Loop Frequency Selective Surface(NCDSL FSS).The results show that such structure is insensitive to the incident angle and the polarization of the incident electromagnetic wave.Compared to the CDSL FSS,the performance of NCDSL FSS is less influenced by the grating lobe.Unlike CDSL FSS,NCDSL FSS has the ability of bidirectional tuning the band spacing based on the Double Square Loop Frequency Selective...