In this letter, a miniaturized frequency selective rasorber (FSR) based on complementary bandpass frequency selective surface (FSS) for fifth generation applications is designed. It is formed by the superposition of tortuous annular resistive layer and complementary bandpass FSS layer. The tortuous annular resistive layer consists of a regular octagonal patch and two bent metal rings. Four lumped capacitors and eight chip resistors are loaded to achieve impedance matching and wave absorption. In the bandpass layer, a complementary Jerusalem cross structure is adopted to realize electromagnetic wave transmission and structural miniaturization. The proposed FSR exhibits A-T-A filtering characteristics. The center frequency of passband is located at 2.6 GHz and transmission rate reaches 87.5%. Under 80% absorption rate, low-frequency absorption band ranges from 1.64 to 2.36 GHz, and high-frequency absorption band ranges from 1.64 to 2.36 GHz. Finally, a 500 mm × 500 mm prototype is fabricated, and the measured results are highly consistent with the simulated results.

中文翻译：

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5G 应用中基于互补带通 FSS 的小型化选频吸收器设计


在这封信中，设计了一种基于互补带通频率选择表面（FSS）的小型频率选择吸收器（FSR），用于第五代应用。它由曲折环形电阻层和互补带通FSS层叠加而成。曲折环形电阻层由正八边形贴片和两个弯曲金属环组成。负载4个集总电容和8个贴片电阻，实现阻抗匹配和吸波。带通层采用互补的耶路撒冷十字结构，实现电磁波传输和结构小型化。所提出的 FSR 具有 ATA 过滤特性。通带中心频率位于2.6GHz，传输率达到87.5%。 80%吸收率下，低频吸收带范围为1.64~2.36 GHz，高频吸收带范围为1.64~2.36 GHz。最终制作出500 mm×500 mm的样机，测量结果与仿真结果高度一致。