▎ 摘　　要

Graphene has attracted great interest for antenna applications because of its two-dimensional nature and superior electronic properties. Low losses, strong confinement, and high tunability properties of surface plasmon make this material as one of the suited material for terahertz applications. In this paper, we have investigated the surface plasmon polariton properties and plasmonic resonance of the graphene dipole antenna at low-terahertz frequency range and compared its radiation performance with that of carbon nanotube and copper, in order to find the suitability of these materials for THz antenna designing. Surface conductivity and surface impedance of graphene, carbon nanotube, and copper at terahertz band have been studied. The performances of these antennas are analyzed, and it was found that graphene plasmonic antenna better suits for making THz antennas.