_ Section Nano antennas (Rectenna)
Communication between the feeding system and the physical communication platform between different parts of a nano system and Nano antennas (Rectenna)
Researcher and author: Dr. Afshin Rashid
Note: The dimensions of the antenna and nano system or nano sensor set, working frequency, power losses, range and dimensions of the sensor network, the structure and facilities of the power supply system and the physical platform of communication between different parts of a nano system are the main factors and parameters that every One is decisive and determines the ability to build and the performance of the final system.
Nano network is a communication network at nano scale between nano devices. Nano devices face certain challenges in performance due to limitations in power management processing ability . Therefore, these devices are expected to perform simple tasks that require different and new approaches. In the molecular communication system, the transmitter Information is sent by chemical molecules called information molecules, and after being released into the environment, it is received and decoded by the telecommunication receiver. In general, in order to receive electromagnetic waves in space, the dimensions of the antenna must be in the order of be the size of the input wavelength to its surface. Due to the very small dimensions of nano sensors, nano antennas need to have a very high working frequency to be usable. The use of graphene helps to solve this problem to a great extent.can meet this need. In addition, there are several nano-telecommunication technologies that require the use of external stimulation and measurement to operate. Wireless communication between the nano-network and the device. and micro and macro equipment can cover a wider area and perform more network processing
The speed of propagation of waves in CNTs and GNRs can be up to 100 times lower than its speed in vacuum, and this is related to the physical structure, temperature and energy. Based on this, the resonance frequency of graphene-based nano-antennas can be two orders of magnitude lower than nano-antennas based on nano-carbon materials. It has been mathematically and theoretically proven that a quasi-metallic carbon nanotube can emit terahertz radiation when a time-varying voltage is applied to its sides. With the possibility of making nanotubes with a length of several centimeters, the possibility of making electrical conductors with a length-to-width ratio of the order of 7^10 exists. > that the Dipole radius is larger than the skin depth and also The resistance loss is so low that it can be ignored. In the main theory of Dipole antennas to determine the current distribution on the antenna, has. At first glance, nanotube antennas give us the impression that they are similar to Dipole antennas designed in small dimensions. But in fact it is not the case.
Conclusion :
Antenna dimensions and nano system or nano sensor set, operating frequency, power losses, range and dimensions of the sensor network, structure and facilities of the power supply system and the physical platform of communication between different parts of a nano system are major factors and parameters, each of which It is a kind of determinant and determines the ability to build and the performance of the final system.
Researcher and author: Dr. Afshin Rashid
Specialized doctorate in nano-microelectronics