AMC吸波体设计及其应用

对基于涡旋谐振环的AMC结构引入介质损耗,得到了一种“完美”吸波体,实现了单一频点2 GHz下较强的窄带吸波；然后加载集总参数元件拓展吸波体的频带宽度,在低频超宽带1.7 ~ 2.2 GHz范围实现了90%以上的吸收率,并对其吸波机理进行了分析；最后将宽带吸波体敷设到开缝腔体内壁上抑制腔体谐振,解决了屏蔽腔体的高谐振问题,开辟了超材料的一个新的应用领域。

Design of an Absorber based on AMC and its Application

Introducing dielectric loss to the artificial magnetic conductor (AMC) Based on vortex resonance, a perfect microwave absorber is achieved. The structure can realize strong microwave absorbing at the designed frequency which is 2 GHz. With lumped elements loaded to this structure, the frequency band is expand to a broadband range. Specifically, the absorptivity of the improved structure can achieve more than 90 percent at frequency band of 1.7~2.2 GHz. At the same time, the absorbing mechanism is analyzed.Finally, the designed broadband microwave absorber are applied to a slotted cavity, and the simulation results show that the absorber can restrain cavity resonance. The proposed microwave absorber design provides a method for shielding high resonant cavity, and develops a new application filed for metamaterials.