A tunable electromagnetic wave absorber for uniform reflection modulation in broadband
Abstract
The development of broadband, tunable electromagnetic wave absorbers with stable reflectivity is crucial for real-time reconfigurable applications, particularly in radar systems. Conventional tunable absorbers often rely on absorption band shifts, which may lead to non-uniform reflectivity profiles. A broadband reconfigurable electromagnetic absorber based on wideband unit configuration is proposed, which enables real-time, uniform control of reflectivity in broad frequency range from 4 to 18 GHz (relative bandwidth 90.9%). Unlike conventional tunable absorbers, which primarily rely on absorption band shifts, the proposed absorber maintains a flat reflectivity profile over the entire frequency range. Furthermore, it exhibits stable absorption characteristics for oblique incidence angles ranging from 0° to 30°. Reflectivity is controlled via the adjustment of bias voltage, and experimental results show excellent agreement with simulation predictions, validating the design. The unique capabilities of this absorber bring great application potential in adaptive display technologies, electromagnetic wave control in communication systems, and dynamic radar systems.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (9)
Meng-Jing Zhou
Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology 1 , Beijing 100081,
Fan Ding
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
Si-Ning Yu
China Astronautics Standard Institute 3 , Beijing 100071,
Xu-Jin Yuan
Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology 1 , Beijing 100081,
Xiu-Zhu Ye
School of Information and Electronics, Beijing Institute of Technology 4 , Beijing 100081,
Yi-Ting Liu
Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology 1 , Beijing 100081,
Wei-Bin Sun
Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology 1 , Beijing 100081,
Hong-Lin Yuan
Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology 1 , Beijing 100081,
Mingji Chen
Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology 1 , Beijing 100081,