In this paper, a design scheme for a dual-band waveform-selective metasurface absorber (MSA) is presented based on the combination of two metal resonator structures loaded with nonlinear circuits. Dual-band MSAs with four different configurations are constructed by loading capacitor/inductor-based nonlinear circuits into the gaps of two square-patch (SP) and two square-ring (SR) resonators, all of which can achieve selective absorption of short pulses and continuous waves (CWs) at two frequencies independently. As a typical example, the dual-band MSA with the SP resonator loaded with the inductor-based nonlinear circuit and the SR resonator loaded with the capacitor-based nonlinear circuit is systematically studied. First, the selective absorption performance of the dual-band MSA for CWs and pulses under different input powers is demonstrated. Second, the selective absorption properties of the dual-band MSA for pulses with different pulse widths are studied. Third, the waveform-selective absorption characteristics of the dual-band MSA for oblique TE and TM waves are also illustrated. Finally, the influence of circuit component parameters on the selective absorption properties of pulses and CWs is systematically studied. The proposed dual-band MSAs have potential application areas such as antenna design, wireless communications, and electromagnetic compatibility.

中文翻译：

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基于两种加载非线性电路谐振器结构组合的双频带波形选择性超表面吸波器设计

本文提出了一种基于两种加载非线性电路的金属谐振器结构组合的双频带波形选择性超表面吸收器（MSA）的设计方案。通过将基于电容/电感的非线性电路加载到两个方贴片（SP）和两个方环（SR）谐振器的间隙中构建了四种不同配置的双频MSA，所有这些都可以实现短脉冲的选择性吸收和连续波（CW）在两个频率独立。作为典型例子，系统地研究了加载基于电感的非线性电路的SP谐振器和加载基于电容的非线性电路的SR谐振器的双频MSA。首先，展示了双频 MSA 在不同输入功率下对连续波和脉冲的选择性吸收性能。其次，研究了双频MSA对于不同脉冲宽度的脉冲的选择性吸收特性。第三，还说明了双频 MSA 对斜 TE 和 TM 波的波形选择性吸收特性。最后系统研究了电路元件参数对脉冲和连续波选择性吸收特性的影响。所提出的双频 MSA 具有潜在的应用领域，例如天线设计、无线通信和电磁兼容性。