Small-size metamaterial perfect absorber operating at low frequency

Abstract

A small-size metamaterial perfect absorber operating at low frequency is proposed. Due to the special design, the unit-cell dimension with respect to wavelength is very small, a/lambda similar to 1/17, at the absorption frequency of 377 MHz. The absorption frequency is strongly dependent on the length of zigzag wire. In addition, the absorption is more than 94% in a wide range of incident angle of electromagnetic wave up to 50 degrees. The results show that the proposed absorber is promising to be applied into devices in radio region.