The connection between the feeding system and the physical substrate, the connection between different parts of a nano system and the dimensions of nano antennas

Department of nano-micro-antennas and nano-electromagnetic waves (Nano-Micro-Antena)

The connection between the feeding system and the physical substrate, the connection between different parts of a nano system and  the dimensions of nano antennas

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 in a way and determines the ability to build and the performance of the final system.

A nano network is a nano  scale communication network between nano devices.  Nano devices face special 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 sends information through chemical molecules called information molecules, and after it is released in the environment, it is received and decoded by the communication receiver. A network of communication nanoparticles can cover a wider area and perform more network processing . In addition, there are several nanotelecommunication technologies that require the use of external stimulation and measurement to work Wireless communication between nano network and micro and macro devices and equipment can  meet this need. In general, in order to receive the electromagnetic wave in the space, the dimensions of the antenna must be in the order of the wavelength of the input 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.

The speed of propagation of waves in CNTs and GNRs can be 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. Despite the possibilities of making nanotubes with a length of several centimeters, it is possible to  make electrical conductors with a length-to-width ratio of the order of 10^7  . 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 so.  In the main theory of Dipole antennas, to determine the current distribution on the antenna, that the Dipole radius is larger than the skin depth and also  the resistance loss is so low that it can be ignored.  

Conclusion : 

Antenna dimensions and nano system or nano sensor set, working frequency, power loss, range and dimensions of the sensor network, structure and facilities of the feeding 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