Polarization independent meta-structure absorber using array of embedded gelated deep eutectic solvent for X-band applications

A polarization independent meta-structure absorber is proposed using cylindrical embedded subwavelength structures of gelated deep eutectic solvent (DES) in silicone rubber (SR) substrate with aluminium back. The absorber is designed and developed with thickness of 3 mm
$(=\lambda/10)$
for X-band applications. Measured absorption performance of the absorber shows a -10 dB bandwidth of 3.45 GHz and - 26.23 dB reflection loss (>99% absorption) at 9.76 GHz. The absorber shows wide angle polarization insensitivity upto
$\pm 90^{\circ}$
. The absorber performance is retained upto 20 mm of bending curvature. The absorption mechanism in the proposed absorber is investigated and discussed through field analysis at the resonant frequency.