A novel dual-polarized frequency-selective rasorber (FSR) using an omnidirectional planar resistor based on graphene flake is presented in this article. The FSR exhibits a low-loss transmission window above an absorption band. It consists of a lossy layer and a lossless bandpass frequency-selective surface (FSS). In the lossy layer, a central symmetric graphene-metal hybrid structure is formed by connecting four metal strip-based resonant circuits with a square graphene flake. A low insertion loss transmission band is obtained by removing the resistance out of the parallel resonant circuits. Moreover, equivalent circuits are utilized to demonstrate the working mechanism. The proposed FSR exhibits a good absorption performance from 8.15 to 13.8 GHz, and a low insertion loss of 0.15 dB obtained at 16 GHz. Finally, a prototype FSR is fabricated and good agreement between the simulated and the measured results is obtained. The FSR has further advantages of avoiding the process of welding multiple lumped resistors per unit, thereby greatly reducing the number of lumped components and improving the planar integration of the structure.

中文翻译：

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具有石墨烯基平面电阻器的低损耗双极化频率选择吸收器

本文介绍了一种使用基于石墨烯薄片的全向平面电阻器的新型双极化频率选择吸收器 (FSR)。FSR 在吸收带上方表现出低损耗传输窗口。它由有损层和无损带通选频表面 (FSS) 组成。在有损层中，通过将四个基于金属条的谐振电路与方形石墨烯薄片连接，形成中心对称的石墨烯-金属混合结构。通过从并联谐振电路中去除电阻，可以获得低插入损耗的传输带。此外，利用等效电路来演示工作机制。所提出的 FSR 在 8.15 至 13.8 GHz 范围内表现出良好的吸收性能，并在 16 GHz 下获得 0.15 dB 的低插入损耗。最后，制造了一个原型 FSR，并获得了模拟和测量结果之间的良好一致性。FSR的进一步优点是避免了每单元焊接多个集总电阻的过程，从而大大减少了集总元件的数量，提高了结构的平面集成度。