Miniaturized broadband absorber based on fractal structure metasurface
Abstract
A broadband metasurface microwave absorber with a miniaturized size is presented under two mechanisms. A frequency selective surface based on the Minkowski (MSK) fractal structure is constructed to provide a lower resonance frequency with the similar size, and the Salisbury screen is designed to create high-frequency resonance. Then, a second-order MSK fractal ring is loaded to realize impedance matching over the entire bandwidth. The absorption performance of the metasurface absorber (MA) proposed is validated by the equivalent transmission line model, the Smith chart, and the surface current distribution. The simulation results demonstrate an absorption bandwidth of 125% with an absorption rate of >90% over 0.3–1.3 GHz. The thickness of the proposed absorber is 0.075λ, and the size of the unit cell is 0.1λ. The developed absorber exhibits stable absorption performance for both TE and TM polarizations within an incident angle of 40°. The experimental results agree with those of full-wave simulation.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (6)
Pufan Bai
School of Electronic and Information Engineering, Beihang University 1 , Beijing 100191,
Hui Deng
Zixiong Liu
State Key Laboratory of Integrated Chips and Systems and School of Microelectronics, Fudan University 1 , Shanghai 200433,
Yang Cai
Tongsheng Xia
School of Electronic and Information Engineering, Beihang University 1 , Beijing 100191,
Xiangfen Wan
School of Reliability and System Engineering, Beihang University 3 , Beijing 100191,