A Thin Magnetic-Type Absorber for Wide Incidence Angles and Both Polarizations Using Dipole-Arrays

4th Annual International Workshop on Materials Science and Engineering

Wang, Shuai^1 ; Ye, Cailin^1 ; Zhang, Linbo^1 ; Xie, Haiyan^1 ; Liang, Difei^1 ; Xie, Jianliang^1

State Key Laboratory of Electronic Thin Film and Integrated Devices, National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu

610054, China^1

关键词: Broad bandwidths;    Impedance characteristics;    Incidence angles;    Magnetic polymers;    Microwave radars;    Normal incidence;    Oblique incidence;    Simulated results;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012084/pdf
DOI  :  10.1088/1757-899X/381/1/012084

来源: IOP

【 摘 要 】

A thin microwave radar absorber with metallic dipole arrays incorporated into magnetic polymer composite is proposed to operate over a wide range of incidence angles for both TE and TM polarizations. Owing to the impedance characteristics, the magnetic absorber (MA) without dipoles cannot hold oblique-incidence-absorption for TM polarization. By introducing dipoles, the incorporated MA exhibits a broad bandwidth for reflection equal or less than -10 dB for incidence angle up to 60° for TM polarization, and remains excellent oblique-incidence absorption for TE polarization. The improvement of oblique-incidence absorption for TM polarization is related to LC resonance caused by the embedded dipoles. The experimental results show that the proposed MA with a thickness of 2.0mm provides wide bandwidth (5.0 GHz ∼15.7 GHz for normal incidence and 4.5 GHz ∼14.8 GHz for incidence angle of 45°) for TM polarization, which is agreement with the simulated results.