A research on the design of metamaterial absorber with the functions of sensing at low frequency and wideband absorption at high frequency

Based on the strontium titanate and resistance film, a multilayer metamaterial absorber with the functions of sensing at low frequency and wideband absorption at high frequency is designed in this paper. The metamaterial absorber produces an absorption peak at 1.09 GHz at low frequency, which can be used for sensing and measurement; a wideband absorption peak from 9.2 GHz to 10.9 GHz appearsat high frequency, the bandwidth is 1.7 GHz. The absorption mechanism of metamaterial absorber at low frequency and high frequency areexplainedby monitoring the surface current distribution at the absorptive frequencies. The results prove that the absorption property of metamaterial absorber at low and high frequency are polarization-independent, but sensitive to the incident angle. The metamaterial absorber has the advantages of simple and multifunction, therefore it has potential application value on the fields of sensing measurement, detection and electromagnetic stealth.