Wideband Single-Layer FSS-Based Electromagnetic Absorber Using Complementary Susceptances

This paper investigates the circuit model of an electromagnetic absorber based on a single-layer frequency-selective surface exhibiting a thin profile and broadband absorption. The circuit model is decomposed into series and parallel susceptances, which are then made complementary near ω0 in an effort to maximize bandwidth. As a result, a versatile design strategy is developed with only three input dependencies: mean absorption frequency ω0, desired absorption magnitude, and desired absorber thickness t. The required circuit values can be directly defined in terms of these three design specifications.