Polarization Independent Ultrathin Dual-Band Metamaterial Absorber for X-Band Applications

This paper, an ultrathin dual-band Metamaterial absorber have been proposed for X-band applications. The unit cell of proposed absorber composed of two cross ellipses surrounded by U-shaped element imprinted on grounded FR4 dielectric substrate. The designed absorber has thickness λ/53, λ corresponds to wavelength of lowest resonant frequency. The designed structure is polarization ineffective due to symmetrical design of unit cell. The presented absorber is compact in size, very low thickness and seems to be potentially instructive for dual-band applications. The oblique incidence for both TM and TE mode response is also steady.