摘要
设计了十字单元的远红外带通型频率选择表面(FSS),并采用模匹配法对其传输特性进行了研究,其中单元中的场分布用有限元法求出。根据此方法研究了不同极化方式的电磁波在斜入射条件下,对不同布阵方式的远红外FSS传输特性的影响。结果发现,无论单元是按正方形布阵还是按正三角形布阵,在电磁波斜入射时中心频率都随入射角的增大而向低频漂移,带宽都相应减小。但无论入射波是什么极化方式,所设计单元按正三角形布阵时的传输特性都比正方形布阵方式稳定。
Based on cross-element, far-infrared bandpass Frequency Selective Surface （FSS） is designed. Its transmission characteristics are researched by mode matching, and element＇s field distribution is obtained with finite element method. The effect of the polarization of the electromagnetic wave and the incident angles on the far-infrared FSS transmission characteristics for different arrangement is investigated. The result is that center frequency shifts to low-frequency with increase of incident angle under oblique incidence, the band width narrows correspondingly, for both square element arrangement and regular triangle arrangement. No matter what polarization of the incident electromagnetic wave, element＇s transmission characteristics for the regular triangle arrangement is more stable than that of square arrangement.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2006年第6期41-44,共4页
Opto-Electronic Engineering
关键词
频率选择表面
模匹配
中心频率
传输特性
Frequency selective surface （FSS）
Mode matching
Center frequency
Transmission characteristics
