Design, simulation, and measurement of metamaterial absorber

We present a design for metamaterial absorber which is resonant with strong absorbance in the microwave frequency range. Our fabricated design consists of two resonators and a metal wire that couple separately so as to absorb all incident electric and magnetic fields within a single planar layer which is only 0.9 mm thick. Experiments demonstrate that the transmission coefficients (S(21)) are lower than -10 dB across the entire measurement frequency range and the reflectance coefficients (S(11)) are about -20 dB around 10.4 GHz. The absorptivity which can be obtained through S parameters is greater than 98% around 10.4 GHz in experiments and 99.9% in simulations. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3311964]