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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。
Through research and experiments, the combination of artificial electromagnetic materials to achieve the low-frequency (less than 4GHz) and broadband performance. By using equivalent circuit and genetic algorithm, firstly, the requirement of low reflection in a certain bandwidth is realized, and the FSS is combined with the above results to obtain the corresponding experimental results. The research and the experiment show that: The broadband low-reflection characteristic is achieved at a thickness of 5 cm with reflectivity below -10 dB at 2 to 3 GHz.