A broadband polarization-insensitive circuit analog absorber using lumped resistors

In this paper, a broadband circuit analog absorber has been presented based on lumped resistors, which exhibits 10 dB absorption bandwidth from 3.96 GHz to 8.16 GHz, covering entire C-band. The designed structure is polarization-insensitive and wide-angle absorptive. The effect of the lumped resistors has been studied to examine the absorption mechanism of the wideband absorber. The structure has also been fabricated, whose measured results are in good agreement with the simulated responses.