Tunable terahertz filter/antenna-sensor using graphene-based metamaterials

In this paper, a novel tunable graphene-based bandstop filter/antenna-sensor is presented. This structure an integrated module that can be used to combine filtering and high-gain radiation performance. The initial design of the unit cell consists four U-shaped stubs loaded, resembling arms ring sensing layer in substrate. reflection transmission spectra are obtained for various graphene’s chemical potentials refractive index (Ns) range 1.3–1.6 THz. proposed exhibits attributes both dual-band filter single-band antenna-sensor. conductivity graphene its structural parameters studied optimize component mode, first from 1.23 1.6 THz equal 26% fractional bandwidth (FBW) at 1.415 second stopband centered 3.12 with FBW 14% Ns = 0.6 eV potential. antenna single band antenna-sensor 1.95 same It shown sensitivity 0.145 THz/RIU achieved 1.5 potential eV. Additionally, performance investigated different wave polarizations oblique angles.