电子学报2025，Vol.53Issue(10)：3504-3513,10.DOI:10.12263/DZXB.20250520
双频带波形选择性超表面吸收器
Dual-Band Waveform-Selective Metasurface Absorber
摘要
Abstract
To address the limitations of traditional metasurface absorbers(MSAs),such as single-band operation and the inability to distinguish between pulse waves(PWs)and continuous waves(CWs),this paper proposes a design scheme for a dual-band MSA based on full-wave rectifier nonlinear circuits.The basic unit of the MSA structure consists of three layers,including two metal square ring resonators of the same size with nonlinear circuits loaded on the top layer,a middle dielectric layer,and a bottom metal ground plane.Through an innovative combination of capacitive/inductive nonlinear cir-cuits and the introduction of an additional parallel inductor to adjust the resonant frequency,four implementation methods for MSAs with dual-band waveform-selective absorption performance are developed.These MSAs can accurately and inde-pendently absorb specific waveforms(CWs or PWs)within two different frequency bands.Moreover,the operating frequency bands can be flexibly adjusted simply by changing the value of the parallel inductor,which significantly enhances the opera-tional flexibility and adaptability of the designed MSAs.This effectively overcomes the limitations of existing electro-magnetic wave-absorbing devices in complex multi-spectrum application scenarios.To ensure the universality of the re-search,this paper takes one type of dual-band MSA among the four as the key research object,specifically the one loaded with an inductive nonlinear circuit and a capacitive nonlinear circuit with an additional parallel inductor,and focuses on in-vestigating its waveform selection characteristics.First,the selective absorption performance of this dual-band MSA for CWs and pulse waves PWs with different powers are thoroughly explored through electromagnetic-circuit co-simulation,clarifying the critical influence of the power threshold(−5 dBm)on the rectification function of the diode and impedance matching.Second,the selectivity of the dual-band MSA for pulse waves under different pulse widths is studied,verifying its matching relationship with the circuit time constant.Subsequently,a detailed analysis is conducted on the influence of oblique incidence of transverse electric(TE)-polarized waves and transverse magnetic(TM)-polarized waves on the wave-form-selective absorption performance of the dual-band MSA,confirming that this MSA exhibits wide-angle stability.Finally,this paper systematically elaborates on the influence of lumped circuit component parameters(RC,C,RL,L)on the selective absorption performance of the MSA for incident waves with different waveforms.The dual-band waveform-selective MSA proposed in this paper,with its flexible frequency band tunability and stable polarization/angle adaptability,provides an effective technical approach to address the issues of"pulse clutter filtering"and"inter-band interference suppression"in multi-band communications.It holds significant theoretical value and potential application prospects in the fields of antenna design,wireless communication signal optimization,and electromagnetic compatibility(EMC)protection.关键词
超表面吸收器(MSA)/波形选择性/双频带/连续波(CW)/脉冲波(PW)Key words
metasurface absorber(MSA)/waveform selectivity/dual-band/continuous wave(CW)/pulse wave(PW)分类
信息技术与安全科学引用本文复制引用
田文梁,邢瑞,程用志,罗辉,李享成..双频带波形选择性超表面吸收器[J].电子学报,2025,53(10):3504-3513,10.基金项目
国家自然科学基金(No.52304410) （No.52304410）
湖北省重大项目(No.2023BAA003) National Natural Science Foundation of China(No.52304410) （No.2023BAA003）
Major Project of Hubei Province(No.2023BAA003) （No.2023BAA003）
