Microwave Single Layer Metamaterial Absorber

a single-layer, low profile metamaterial absorber is designed and experimentally characterized in the microwave region. The unit-cell of the metamaterial structure is composed of a rectangular shape split ring resonator (SRR) placed around four square patches of different sizes. All are etched on a 1.6 mm dielectric FR4 substrate baked by a continuous metallic ground-plane. Full wave’s simulation and measurement show multi-distinctive near-perfect absorption peaks at several frequencies from 3.75 GHz to 16 GHz. A large continuous bandwidth is achieved from 8.7- to 11 GHz (absorption > 90%). The designed monolayer absorber would be a promising candidate in radar X-band and imaging applications.