随机分布贴片构成频率选择表面的吸波特性研究

Absorbing Properties of Frequency Selective Surface with Random Distributed Patches

探讨了随机分布贴片构成的频率选择表面在吸波材料应用中的原理,提出了用随机分布的电阻贴片来拓展吸波带宽和提高吸收率。用有限元方法仿真分析了这种频率选择表面应用于吸波材料设计的可行性。讨论了表面占有率、表面电阻率以及分布形式对复合材料反射率频率特性的影响。仿真结果证明包含这种新型FSS结构的吸波材料可以很好地改善材料的吸波性能。

In this paper, we have discussed the principle of electromagnetic wave absorption of frequency selective surface with random distributed patches （RDFSS） and its application in absorbing composite material design. It is presented that the new absorbers will have wider bandwidth and deeper absorption while using FSS with random distributed resistive patches. With finite element method, the effects of occupancy factor, distribution and surface resistance of the patches upon absorbing performances of composite have been studied numerically. The results show that these parameters have notable effects on absorbing properties of the material composed of resistive RDFSS, and absorbing properties could be improved greatly in wide band when the parameters are optimized.