Design of X-Band Bicontrollable Metasurface Absorber Comprising Graphene Pixels on Copper-Backed YIG Substrate

Abstract

The planewave response of a bicontrollable metasurface absorber with graphene-patched pixels was simulated in the X band using commercial software. Each square meta-atom is a 4×4 array of 16 pixels, some patched with graphene and the others unpatched. The pixels are arranged on a PVC skin which is placed on a copper-backed YIG substrate. Graphene provides electrostatic controllability and YIG provides magnetostatic controllability. Our design delivers absorptance ≥ 0.9 over a 100-MHz spectral regime in the X band, with 360 MHz kA −1 m magnetostatic controllabity rate and 1 MHz V −1 µm electrostatic controllability rate. Notably, electrostatic control via graphene in the GHz range is novel.