A dual-polarized three-dimensional absorptive frequency selective transmission (AFST) structure consisting of bent metallic strips embedded with chip-resistors, and a parallel plate waveguide has been introduced. The structure exhibits two wide absorption bands which flank both sides of the passband, and each absorption band contains two reflection zeros contributing to the wideband performance. An equivalent circuit model is derived to investigate the design concept. A prototype is fabricated and measured, and good agreement between the simulated and experimental results is obtained. In addition, the AFST shows a stable response even for oblique angles and for both TE- and TM-polarizations.

中文翻译：

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具有双吸收带的双极化频率选择性吸收器

介绍了一种由嵌入芯片电阻器的弯曲金属条和平行板波导组成的双极化三维吸收频率选择传输 (AFST) 结构。该结构表现出两个宽吸收带，位于通带两侧，每个吸收带包含两个有助于宽带性能的反射零点。导出等效电路模型来研究设计概念。制造和测量了一个原型，并且模拟和实验结果之间获得了良好的一致性。此外，AFST 甚至对于斜角以及 TE 和 TM 极化都显示出稳定的响应。