A Graphene Patch Antenna with Improved Performance for THz Applications

This paper presents the design and development of a miniaturized, efficient graphene-based antenna working in the terahertz (THz) domain. The top radiating patch of square-shaped graphene is designed over silicon dioxide (SiO
2
) substrate while the bottom surface is grounded with gold. The proposed antenna operates over the lower THz frequency bands of 1.3 THz to 2.73 THz and 2.75 THz to 3.01 THz with the maximum return loss of 27 dB at 2.24 THz. The antenna achieves the realized gain of 6.94 dBi at 2.56 THz and provides directional radiation characteristics in both the E- and H-planes. The proposed antenna further exhibits the beam scanning feature over a range close to 32°. The proposed graphene-based antenna is compact, directive, and highly efficient in the THz domain. It finds useful applications in biomedical, satellite communication, high-quality video imaging etc.