Design of circular polarized micro-strip antenna
Shanmugam Bhaskar Vignesh
Date of Issue2016
School of Electrical and Electronic Engineering
The square patch antennas with arms for Wireless Power Harvesting applications has been designed and studied. The antenna designed consists of a square patch with symmetric and asymmetric configurations in order to check the potential possibilities of getting a better performance, to improve the radiation pattern and more importantly to enhance the axial ratio. The structure contains a single feed patch antenna with arms extending from the centre patch which is designed using the FR-4 substrate. This antenna was designed to create circular polarization involving a perfectly square patch. The proposed antenna was designed and simulated using the Computer Simulation Technology (CST) software. A meticulous parametric study has been undertaken in order to have a better understanding of the antenna and to optimize each parameter to contribute to the performance. The designs were fabricated and tested successfully. Measured results and simulated results of the design are then compared and they are in close approximation to each other. Measured results satisfy the requirements of the specification. The objective of this thesis is to analyze, design and fabricate micro-strip square patch antenna used in the wireless power harvesting application. The measured gain obtained was around 4.2 dBic. Return loss obtained in all the designs were around +20 dB. The measured axial ratio < 3 dB was obtained in almost all the directions. In conclusion, square patch micro-strip antenna with symmetric and asymmetric configurations of gaps and arm lengths were designed and studied. The antenna has fulfilled the design specifications suitable for applications of Wireless Power Transmission in the ISM band.
DRNTU::Engineering::Electrical and electronic engineering