CAJ | 학술논문

设计了一个基于平面螺旋结构的极化不敏感超材料吸波体.实验测试结果表明,在2．2 GHz处,超材料吸波体的反射率达到了－4．5 dB.其总厚度为2．2 mm,约为1/62个工作波长,面密度为0．88 kg/m2.当金属基板的一条直角边与电场极化方向夹角分别为0,30,45,60和90°时,仍然具有同样低的反射率,超材料吸波体对垂直入射电磁波极化方向是不敏感的.与传统的吸波材料相比,该超材料吸波体实现了轻质、薄型化,且对入射电磁波极化方向不敏感.
설계료일개기우평면라선결구적겁화불민감초재료흡파체.실험측시결과표명,재2．2 GHz처,초재료흡파체적반사솔체도료－4．5 dB.기총후도위2．2 mm,약위1/62개공작파장,면밀도위0．88 kg/m2.당금속기판적일조직각변여전장겁화방향협각분별위0,30,45,60화90°시,잉연구유동양저적반사솔,초재료흡파체대수직입사전자파겁화방향시불민감적.여전통적흡파재료상비,해초재료흡파체실현료경질、박형화,차대입사전자파겁화방향불민감.
Design of a polarization-insensitive metamaterial absorber based on spiral structures was presented. The measured results indicated that the metamaterial absorber demonstrates a reflectance of -4.5 dB at 2.2 GHz.The thickness of the metamaterial absorber was 2.2 mm,about 1/62 of the working wavelength.The areal density was 0.88 kg/m2 .When the angle between the bottom side of the metal substrate and the field po-larization direction were respectively 0,30,45,60 and 90°,the metamaterial absorber showed similar low re-flectivity.This metamaterial absorber was lightweight,ultrathin and polarization-insensitive to the incident e-lectromagnetic wave compared with traditional microwave absorbers.