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

TL;DR

This paper presents a novel X-band metasurface absorber with graphene pixels on a copper-backed YIG substrate, achieving high absorption and dual electrostatic and magnetostatic controllability, including a novel GHz-range electrostatic control.

Contribution

It introduces a bicontrollable metasurface absorber design utilizing graphene and YIG for dual control, with high absorptance and rapid electrostatic tunability in the GHz range.

Findings

Achieves over 0.9 absorptance in 100 MHz spectral range.

Provides 360 MHz/kA magnetostatic controllability.

Offers 1 Hz m/V electrostatic controllability, including GHz-range control.

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 4x4 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 equal to or in excess of 0.9 over a 100-MHz spectral regime in the X band, with 360 MHz/kA magnetostatic controllabity rate and 1 Hz m/V electrostatic controllability rate. Notably, electrostatic control via graphene in the GHz range is novel.