电磁超介质吸波体的研究

Research on metamaterial-based absorbers

超介质吸波体具有传统吸波材料所不具备的电磁特性,为设计新型电磁防护材料和目标隐身材料提供了一种新的途径.本文介绍了分析超介质吸波体吸波机理的理论方法:等效介质理论,阻抗匹配理论以及分层介质的多次干涉理论.同时,利用单元组合法设计了多频点的螺旋吸波体、单层、多层和加载集总电阻的宽频吸波体,并对其吸波机理进行了研究.

Metamaterial absorbers have some unique electromagnetic properties not existed in traditional absorbers, which open up a new way to design novel electromagnetic protective and target stealth materials. Three theoretic methods for illustrating the absorption mechanism of the metamaterial absorbers are introduced in the present work, including the effective medium theory is presented, impedance matching theory and multi-interference theory. Multiple band absorber based on spiral metamaterial is constructed, along with the resistors loaded broadband metamaterial absorber. In addition, the absorption mechanism are discussed using referred theoretic methods.