Research On Hybrid Structure Metamaterial Absorber

The metamaterials are composed of periodically arranged structural units,which can be optimized by adjusting reasonable structural parameters.The metamaterial absorber(MA)has become a hot topic for researchers in various fields and has been used in the development of various new microwave devices,such as radio communication,antenna and electromagnetic compatibility.In this article,two broad-band metamaterial absorbers with periodic structures by studying the structural characteristics and the absorbing mechanism of metamaterial absorbers were proposed.Aiming at the design ideas of metamaterial absorbers,the research and simulation optimization of metamaterial absorbers based on different surface resonance structures of resistor sheets or semiconductor materials are carried out.The main work contents of this article are summarized as follows:(1)Research work on single-frequency,multi-frequency and wide-band metamaterial absorbers based on metal resonance rings.First,the metamaterial absorber based on a single ring structure is studied,and the law of frequency adjustment of the absorber was studied by changing its structural parameters.Secondly,the analysis of the dual-ring structure metamaterial can realize the law of multi-frequency absorption.Finally,by adjusting the size and arrangement of the metamaterial absorber with double-ring structure,the way to achieve broadband absorption is explored.(2)Research work on a new metamaterial absorber based on a mixture of semiconductor materials and metal patches.Firstly,a metamaterial absorber working in the infrared band is proposed based on the high dielectric constant of the semiconductor material and its characteristics that can realize electric and magnetic resonance in the high frequency segment.The input reflection coefficient,polarization angle,incident angle and wave absorption mechanism of the absorber are numerically simulated.Simulation results show that in the frequency range of 98THz-152 THz,the absorption rate of the metamaterial absorber is greater than 90%,the relative bandwidth is 43.2%,and the highest absorption rate is nearly 100%.At the same time,the absorber also has polarization insensitivity and good wide incident angle characteristics.(3)The resistance sheet can improve the current passing rate and make the absorption of the absorber more adequate,and a new metamaterial absorber based on the resistance sheet is proposed.Simulate the metamaterial absorber,the results show that over 90% of ultra-wideband absorption can be achieved in the visible range from 17 THz to 224 THz.Secondly,this structure can achieve a wide angle of incidence,which can reach more than 60 ° in both TE and TM polarized waves,and at the same time,the polarization of the absorber is insensitive.Through simulation verification,it is proved that the metamaterial absorber can achieve ultra-wideband absorption characteristics,which provides a new idea and method for widening the bandwidth of the absorber.