A Metasurface Absorber with Broadband and Wide-angle Absorption Characteristics
A broadband,wide-angle metasurface absorber with horizontal and vertical metasurface structures is presented.Conventional metasurface absorber with wide-angle absorption characteristic for TE waves exhibits poor absorption stability under oblique TM waves.By employing vertical metasurface structure,the metasurface absorber provides wide-angle absorption stability under both oblique TE and TM waves.Its absorption band ranges from 2.40 to 5.06 GHz(relative bandwidth of 71.3％)under normal incidence,and from 3.04 to 5.06 GHz(fractional bandwidth of 49.9％)when the incidence angle is raised up to 60° for both TE and TM waves.The total thickness of the proposed metasurface absorber is 15.2 mm(0.126 λL),where λL is the wavelength at the lowest operation frequency.
万方数据
维普
