结合FSS的低反射人工电磁材料研究

Study of Low Reflectivity Artificial EM Materials

通过研究和实验,实现了组合形式人工电磁材料的低频(低于4GHz)和宽带的性能。利用等效电路和遗传算法,首先实现了在一定带宽范围内低反射的要求,再通过频率选择型表面(FSS)与上述结果结合,取得相应的实验结果,研究和实验表明:通过合理组合能够在5cm厚度实现宽带低反射特性,其中在2～3GHz内的反射率低于-10dB。

A composite metmaterial was designed in this paper, it has characteristics of wide bandwidth and low operation frequency, which is lower than 4GHz. Low reflection in certain bandwidth was obtained by simulation and experiment, which was realized by using equivalent circuit analogue method combined with Genetic Algorithm （GA）. The - 10dB reflection coefficient in 2 - 3GHz was realized by embedding FSS structure in the composite metmaterial, the total thickness is 5cm, and good measured result was achieved.