Wideband High-Absorption Electromagnetic Absorber With Chaos Patterned Surface

Abstract

A resistive metasurface featured by the Rossler chaos reaction-diffusion system patterns is proposed and realized in a wideband electromagnetic absorber. The chaos surface consists of units with both random shapes and dimensions. Simulation results show absorption phenomenon, and correlation function analysis indicates new wave-absorbing mode can be generated when correlation of the edges of the chaos patterns matches geometrical size of chaos units. Experimental results indicate unconventional bandwidth ratio with reflectivity lower than –10, –15, and –19 dB reaches 96.84%, 80.1%, and 56.1%, respectively. A high-absorption nature makes this structure have application potential in a modern anechoic chamber or other electromagnetic wave absorbers.