Abstract
An ultrawideband reflectionless metamaterial absorber(MA)is proposed by replacing the metallic ground with the complementary split-ring resonator(CSRR)structure.The proposed MA exhibits-10 dB reflectivity spectrum from 1 GHz to 20 GHz,which maintains more than 90％absorption from 1.5 GHz to 20 GHz.Furthermore,it achieves angle stability for TE and TM polarization at oblique incident angles up to 40° and 65°,respectively.To achieve broadband absorption spectrum,we have adopted a single-layer high-impedance surface(HIS)loaded with a double-layer magnetic material(MM)structure.To further realize the RCS reduction into a lower frequency range,we have employed the scattering cancellation technology into the traditional metallic ground.Finally,we have fabricated a sample exhibiting the 10 dB RCS reduction from 1 GHz to 20 GHz with a thickness of 10 mm.Measurement and simulation results confirm that the proposed MA exhibits excellent comprehensive performance,making it suitable for many practical applications.
基金项目
Foundation of Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle,Ministry of Education()
维普
万方数据