Ultra High Efficient 2x1 Graphene Patch Antenna Arrays for Single and Dual Band Operation

Graphene has opened the floodgate for a plethora of new applications in the field of communication due to its outstanding electrical and optical properties. In this paper, three types of Graphene antenna arrays, i.e. rectangular, circular and triangular are designed to operate around 3THz on a silicon (∈
_r
= 11.9) substrate. A single band to dual band operation is achieved for all three types of Graphene antenna arrays at THz frequency range by changing the height of the silicon substrate, which has not been reported before. In comparison to rectangular and circular antenna arrays, triangular antenna array exhibits better performance in terms of S
₁₁
, VSWR, BW and Radiation Efficiency with an S11 of - 39.44dB, VSWR of 1.024, BW of 103.4GHz and a staggering efficiency of 99.11%, which is the highest Radiation Efficiency, reported so far for Graphene antenna array application.