A sub-wavelength polarization insensitive X-band absorber based on interleaved concept

In this paper, a miniaturized absorber realized on interleaved structure across X-band is reported. The presented absorber has been designed based on the concept of complementary interleaved Brigid's cross. Results show that the structure rejects 9.88 GHz with absorption rate of almost 99%. Moreover, the absorber is polarization independent, as it maintains stability against TE- and TM-polarizations. The results from waveguide simulator and space wave measurements provide an efficient absorber at sub-wavelength spacing.