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讨论了带金属导电背板的可调频率选择表面(FSS)吸收体,这种FSS吸收体的阻抗层是无损耗的,集总器件被对称加载到FSS周期单元上。FSS周期单元的谐振频率在特定的频带内会随着集总器件电阻值的改变而发生平移,反射损耗低于-20dB的可调带宽可以覆盖6～12GHz,而且该吸收体的反射、传输特性基本不受入射波入射角度的影响。入射波经过FSS吸收体后基本被消除,而且吸收体的厚度要比传统FSS吸收体薄得多。
An adjustable frequency selective surface (FSS) absorber with a metallic conductive backsheet is discussed. The impedance layer of this FSS absorber is lossless and the lumped components are loaded symmetrically onto the FSS cycle cell. The resonance frequency of the FSS periodic elements shifts within a specific frequency band as the lumped element resistance changes. The adjustable bandwidth with reflection loss below -20 dB covers 6 to 12 GHz and the reflection, transmission characteristics of the absorber Basically not affected by incident angle of incident wave. The incident wave is essentially eliminated by the FSS absorber and the absorber is much thinner than the conventional FSS absorber.