(Nano Telecommunication) Nanotube Antennas (CNTs) or Multilayer and Graphene Nano Tape (GNRs)
Afshin Rashid
Abstract
Note: Nano-telecommunications includes electronic devices and devices , one of the dimensions of which is about one to several hundred nanometers. Accordingly , if the antennas used in nano-components are to be in this range, we should expect the electromagnetic waves used in the communication of these systems and devices to be around tens of terahertz, which will include the wavelengths of infrared, visible and ultraviolet. .The antenna is considered as the primary means of absorbing electromagnetic waves in space and has its own engineering knowledge, which is very developed and extensive. In general, in order to receive the electromagnetic wave in space, the dimensions of the antenna must be in the order of the size of the input wavelength to its surface. Due to the very low dimensions of nano-sensors, nano-antennas need a very high operating frequency to be usable. The use of graphene greatly helps to solve this problem. Wave propagation velocities in CNTs and GNRs can be up to 100 times slower than vacuum velocities, depending on the physical structure, temperature and energy. Accordingly, the resonant frequency of graphene-based nano-antennas can be twice as low as (nano-carbon) nano-antennas.