论文名称：A Dual-Band Dual-Polarization Frequency Selective Surface With Wide-Range Flexible Band Ratio and Wide Angular Stability。本文提出了一种具有宽宽角灵活频比的双频段双极化频率选择表面。在三角形阵列排布的两个独立辐射方形缝隙单元上加载亚波长金属壁（充当平板电容器），实现了小型化，并在1–7.7 GHz频段内实现了1.33至7.11的宽范围灵活频比。通过将单层方形缝隙谐振器改进为双层自解耦结构，使不同层中产生反向电流，从而实现了高达70°的宽角度稳定性。基于基片集成波导（SIW）理论，这些金属壁可通过金属化通孔阵列实现，便于加工制造。该FSS具备独立可控的通带响应特性，并配有等效电路模型（ECM），显著简化了设计流程。所提出的FSS样件已成功制备并进行了测试，实测结果与仿真结果吻合良好，验证了设计的有效性。该FSS可作为天线罩或天线去耦结构，广泛应用于多频段天线、共口径天线、大角度扫描天线阵列以及近场加载等场景，具有很高的设计灵活性。

工作主要完成人：马天培，王洪斌，程钰间。

论文链接：https://ieeexplore.ieee.org/document/10644146

Abstract—A dual-band dual-polarization frequency selective surface (FSS) with wide-range flexible band ratio and wide angular stability is proposed. Subwavelength metal walls acted as plate capacitors are loaded onto two separate radiating square slot elements arranged in a triangular array to realize miniaturization and wide-range flexible band ratio from 1.33 to 7.11 in 1–7.7 GHz. The single-layer square slot resonator is modified into a two-layer self-decoupling structure with reverse currents in different layers to realize wide angular stability up to 70°. Based on the substrate integrated waveguide (SIW) theory, the metal walls can be represented by arrays of vias for fabrication. The independently controllable passband responses and equivalent circuit model (ECM) significantly simplify the FSS design. A prototype of the proposed FSS has been fabricated and measured. The measured results have favorable agreement with the simulated results, thus validating the FSS design. The proposed FSS can act as antenna radome and antenna decoupling structure, which can be widely used in multiband antennas, shared-aperture antennas, wide-angle scanning antenna arrays, and near-field loading, with high design flexibility.

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Index Terms—Equivalent circuit model (ECM), flexible band ratio, frequency selective surface (FSS), plate capacitor, wide angular stability.