一种双频段有源频率选择表面的设计  

A design of Dual-Band Active Frequency Selective Surface

作　　者：黄小忠[1] 杨泽波[1] 杜作娟[1] 王超英[1] 

机构地区：[1]中南大学物理与电子学院,湖南长沙410083

出　　处：《计算机仿真》2014年第9期195-199,共5页Computer Simulation

基　　金：总装新品(1004ZM0039);二炮预研项目(2009C2102)

摘　　要：在频率选择表面问题的研究中,当传统FSS结构成型后,其工作带宽和谐振频率等参数固定,不能适应外部电磁环境的变化。为解决上述问题,设计了一种有源FSS结构,在传统FSS中加载PIN管或变容二极管等有源器件,通过调节器件的偏置电压或电流来改变FSS的电磁特性;运用等效电路法分析了有源FSS结构的传输线模型,利用有限元软件HFSS研究了不同加载方式下,该结构的电磁响应变化;通过有源FSS结构单元与传统FSS结构单元的交替排列,实现了具有双频性质的FSS结构。研究结果表明FSS加载电容时,谐振频率降低,且加载电容值越大,谐振频率越低,带宽越小;FSS加载电感时,谐振频率增大,且加载电感值越小,谐振频率越高,带宽越大。结果表明,为在实际应用中达到带宽优化的效果,应尽可能加载较小的电容与电感。When the traditional FSS structure is produced, its working bandwidth, resonant frequency and other parameters are fixed and it can not adapt to changes in the external electromagnetic environment. To solve this problem, this article presents an active FSS structure which is loaded with PIN diode or varactor or some other active devices, and the electromagnetic characteristics of the FSS can be changed by adjusting the bias voltage or current of the device ; the article analyses the transmission line model of the active FSS with method of equivalent circuit, and studies the electromagnetic response＇ s changes under different loading methods by using the finite element software HFSS; by arranging the active FSS and the traditional FSS alternately, the article obtains a FSS structure with dual-band nature. The results show that when the FSS is loaded with capacitances, the resonant frequency decreases, the larger the capacitance is, the lower the resonant frequency is, and the smaller the bandwidth is; when FSS is loaded with inductance, the resonant frequency increases, the smaller the inductance is, the higher the resonant frequency is, and the larger the bandwidth is. Therefore in order to achieve bandwidth optimization effect in practical application, the loaded capacitances and inductances should be as small as possible.

关 键 词：频率选择表面 等效电路法 双频段 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]