Thin and broadband Salisbury screen absorber using Minkowski fractal structure

Abstract

Salisbury screen radar absorber with high resistive surface is unconstrained by the restriction of 1/4 wavelength thickness of medium. EBG structure is an effective approach to realize it. This paper present a new type of Salisbury screen absorber based on one order Minkowski fractal surface with several symmetric patched resistors. Simulation results show that the total thickness is reduced dramatically compared with traditional Salisbury screen. Resonant frequency and absorbing effect is influenced by the value of resistors. And because of the symmetry of structure the screen is not sensitive to the direction angle with vertical incidence wave.