FAST AND ACCURATE DESIGN METHOD FOR BROADBAND MULTI-LAYERED RADAR ABSORBERS

摘要

The invention is related to a fast and accurate method for the design of broadband multi layered radar absorbing structures comprising of lossy FSS layers. The method comprises of four main steps, namely; candidate FSS types characterization by altering the geometrical dimensions of the FSS patterns, optimization by using circuit equivalent lumped models together with transmission line theory, optimum sheet conductivity (surface resistance) and geometrical dimensions determination within the predefined reactance limits extracted with the aid of full wave computational methods in an iterative manner, and optimization of the final structure within predefined limits concerning FSS dimensions and sheet conductivities to eliminate the effects of undesired and unpredicted couplings between lossy layers.