超材料的谐振特性与其周期单元特性相关,周期单元的某一或是某几个参数的改变可以实现对超材料反射特性的调谐。利用有源集总元件的可变电阻特性,结合超材料设计,通过仿真优化和实验制备得到可电调谐超材料;分析对比了两种不同的布线方式所带来的不同的反射率特性和可调谐特性;并采用等效电路法对主动FSS层的阻抗特性进行了分析。
The electromagnetic response of metamaterials is associated with the geometry of the unit cell,it can be tuned by alerting one or some parameters.In this paper,the lumped elements PIN-diodes which own changeable resistance were used in the designing of tunable metamaterial absorbers,and the experimental validation was presented too.Two different modes of laying the conducting wire which would bring distinct properties also been studied too.To the end,the impedance characteristics of the active FSS was discussed in the method of transmission equivalent circuit model.
参考文献
| [1] | 王焕青,吕明云,武哲.FSS对TE极化波传输特性的实验研究[J].电子学报,2005(06):1099-1101. |
| [2] | Chambers B.;Ford KL. .Topology for tunable radar absorbers[J].Electronics Letters,2000(15):1304-1306. |
| [3] | Tennant A;Chambers B .Adaptive radar absorbing structure with PIN diode controlled active frequency selective surface[J].Smart Materials & Structures,2004(1):122-125. |
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