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仿真并实验验证了基于电磁谐振的极化无关透射吸收超材料吸波体,该吸波体可以实现低频透射和高频吸收.实验测试结果表明,该吸波体在6.77GHz吸收率峰值为83.6%,半功率带宽为4.3%,实现窄带强吸收.为进一步拓展该谐振型超材料吸波体的吸收带宽,利用其低频透射特性,将两个工作于不同频段的吸波体叠加在一起,测试结果表明,复合后超材料吸波体的半功率带宽可以增大到10.9%,吸收率也略有增强.该超材料吸波体设计简单,具有较强的实用性和应用前景.
Simulation and experimental verification of polarization-independent polarization-absorbing metamaterial absorber based on electromagnetic resonance can achieve low-frequency transmission and high-frequency absorption.The experimental results show that the peak absorption of the absorber at 6.77GHz is 83.6 %, Half-power bandwidth of 4.3%, to achieve strong absorption of narrowband.To further expand the absorption bandwidth of the resonant-type meta-material absorbing body, the use of its low-frequency transmission characteristics, the two work in different bands of absorber stack together, The test results show that the half power bandwidth of composite metamaterial absorber can be increased to 10.9%, and the absorption rate is also slightly enhanced.The design of the meta-material absorber is simple, and has strong practicality and application prospects.