Properties of carbon nanotubes loop antenna at Terahertz range

It is the first time this paper investigates the fundamental characteristics of the loop antenna formed single-walled carbon nanotubes from 1.0∼10 terahertz frequency region using finite integral methods. The armchair single-walled carbon nanotubes can be considered due to their metallic conducting. The surface current dense, electric field and magnetic field distribution, scattering coefficient, input admittance, radiation patterns and gain are presented and compared to carbon nanotubes dipole antenna with the same size of the perimeter of the loop antenna. The results demonstrate that carbon nanotubes loop antenna with a radius of 15 µm takes on the resonant frequency properties from 7.35 terahertz to 7.46 terahertz in the center frequency of 7.4 terahertz, corresponding scattering coefficient less than −10dB. The maximum gain of carbon nanotubes loop antenna is 5.7 dB. All results is can be used for the design of carbon nanotubes antenna in the terahertz region.