In this paper,a dual-band metasurface absorber (MSA) based on nonlinear circuits that can selectively ab-sorb pulse wave in the same frequencies is proposed. The unit-cell of the designed dual-band MSA consists of two metal square-ring shaped resonators with the same shape but different wire width,the middle dielectric layer and the metal ground plane. The simulation results show that the absorptance of the dual-band MSA increases firstly and then decreases with the increase of the input power at-20～10dBm. When the power is at-5dBm,the absorptance of the designed dual-band MSA of the pulse wave reaches 97％ and 92％ at 3.2 GHz and 4.1 GHz,respectively,and that of the continuous wave is on-ly 28％ and 39％. In addition,the absorptance of the MSA decreases with the increase of pulse width. Further,simulated re-sults indicate that the dual-band MSA can absorb more than 70％ of pulse wave with an input power of-5dBm at a wide incident angle of 0°～60° for both TE and TM mode. The effects of resistance,capacitance on the absorptance of the nonlin-ear circuit MSA for the incident pulse and continuous wave are also studied. The proposed dual-band waveform selective MSA shows a potential prospect in the fields of wireless communication and anti-electromagnetic interference.
维普
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