Journal ID : AMA-14-10-2021-10793
[This article belongs to Volume - 52, Issue - 02]
Total View : 443

Title : Analysis of Conformal CPW fed Copper and Multiwalled Carbon nanotube microstrip antennas in X- Band Applications

Abstract :

This paper, describes the characteristics of flat and curved antenna structures using copper and Multi- Walled Carbon Nano-Tube (MWCNT) materials. A flexible dielectric substrate, polyimide material with dielectric constant εr= 3.5, tan δ = 0.008, the thickness of 0.1mm, is employed here. The low thickness of dielectric material allows it to be mounted on curved surfaces. The CPW fed conformal structures are designed to resonate at 10 GHz in the X-band (8GHz - 12GHz). Cylindrical curvature structured antennas designed with different radii (10mm, 15mm, and 20mm), and investigated their performance interims of return loss (S11), bandwidth, gain, and radiation efficiency, etc. Here a thin film MWCNT antenna is prepared by using a spin coating technique. The analysis of comparative study for both planar and flexible antennas are carried out in the present investigation. Both simulation and fabrication results are in close agreement with each other. From the experimental results, the planar and conformal antennas (copper and MWCNT) offer approximately the same impedance bandwidth around 33%but antenna gains is reduced from flat to curved structures of different radii (20mm, 15mm, and 10mm) in the intended direction. Material resonant properties and feeding techniques allow to enhance impedance bandwidth. The resistivity of the conductive material used in the antenna design increases as the bending angle is increased, this leads to a gradual increase in beam width and hence a drop in gain within the operating band of frequencies. The MWCNT antennas are suitable for low- power communication applications and in gas and harsh chemical environments where conventional materials get effected. Conformal antennas are widely employed in satellite, automobile and defense, Synthetic aperture radar applications.

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