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13-03-2016, 06:28 PM

I want a ppt on carbon nanotube antanna in subtetrahertz range.

**dhanabhagya** · 19-03-2016, 02:21 PM

carbon nanotube antenna in the sub terahertz range ppt

Abstract

In this paper, a new antenna configuration is proposed to operate efficiently in the sub-terahertz frequency range (10-1000 GHz). The proposed antenna is composed of a bundle of single-walled carbon nanotubes (SWCNTs) surrounded by two dielectric jackets; the inner of which is dielectric foam with relative permittivity close to unity. The outer one is a metamaterial layer with permittivity much smaller than the free-space permittivity. Rigorous analysis shows that the metamaterial layer helps to reduce the axial propagation constant of the surface wave mode traveling along the antenna. The radiation resistance and the radiation efficiency of a resonant dipole antenna are derived. Numerical results show that these parameters are considerably enhanced at the sub-terahertz frequencies relative to the SWCNT bundle antenna.

18-07-2017, 12:39 PM

I want ppt on carbon nanotube antenna in subtera hertz range

jaseela123d · 24-07-2017, 03:51 PM

A transcendental equation is derived for the complex propagation parameter of the electric current in the antenna. Therefore, the resonance length of the antenna is obtained along with the radiation resistance and the radiation efficiency. Single-wall batches (SWCNT) and multi-walled carbon nanotubes (MWCNT) are analyzed. Numerical results are obtained for the antenna parameters and can be used for the design of the antenna at a given frequency.

In communications and electronic engineering, a transmission line is a specialized cable designed to carry radio frequency alternating current, carbon nanotubes are expected to aid in the miniaturization of electronic circuits. It is expected that the contact bridge between macroscopic and nanoworld. CNTs working as antennas is a field still in its infancy. They are expected to work efficiently in the high frequency range. The increase in radiation efficiency in the tera inheritance range was achieved using a single wall carbon nanotube beam (SWCNT) instead of a single SWCNT. However, a lower cutoff frequency (100 GHz) is still produced. The proposed paper structure was used to improve the radiation efficiency and the resistance to radiation in the lower part of the tera hertz band or tert hertz band. The antenna of nanotubes differs from an ordinary antenna due to its high kinetic inductance, characteristic impedance, etc.

Carbon nanotubes (CNTs) are carbon allotropes. They have novel properties that make them potentially useful in many applications in nanotechnology, electronics, optics and other fields of materials science. They exhibit extraordinary strength and unique electrical properties, and are efficient conductors of heat. CNTs are members of the fullerene structural family. The ends of a CNT could be capped with a hemisphere of bucky ball structure. Carbon nanotubes are one of the most commonly mentioned building blocks of nanotechnology. With one hundred times the tensile strength of the steel, the thermal conductivity better than all the purest diamonds, and the electrical conductivity similar to copper, but with the ability to transport much higher currents, appear to be a wonder material.

Its mechanical strength properties have been extensively studied. They are exceptionally strong and have been used for advanced composite material. Carbon nanotubes remain particularly suitable for applications in high-performance electronics, sensors and other technologies. They are expected to aid in the miniaturization of electrical circuits. CNTs that work as antennas are still in their infancy. Combining their strength and conductivity, the carbon nanotube antennas are expected to work well in the high frequency range, ie the tera hertz range. CNTs that work as antennas have potential applications to be used to produce shockproof devices that work faster and more efficiently. CNT antennas are expected to perform well in the tera hertz range. However, attenuation occurs at the bottom of this range. The proposed structure is expected to work well in this range and is described in the following sections.

Carbon nanotubes (CNTs) are carbon allotropes that are members of the fullerene structural family, which also includes bucky spherical balls. These are large macromolecules that are unique in size, shape and remarkable physical properties. The nature of the bonding of a nanotube is described by applied quantum chemistry, specifically, orbital hybridization. The chemical bond of the nanotubes is composed entirely of sp2 bonds, similar to those of graphite. This binding structure, which is stronger than the sp3 bonds found in the diamond, provides molecules with their unique strength. The nanotubes naturally line up in strings joined by Van der Waals forces. The nanotubes have been built with a length to diameter ratio of up to 132,000,000: 1, significantly higher than for any other material.

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