Enhanced Performanced Of Circular Polarized Antenna By Using Metasurface

Chew, Jun Ren (2017) Enhanced Performanced Of Circular Polarized Antenna By Using Metasurface. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text Enhanced Performanced Of Circular Polarized Antenna By Using Metasurface - Chew Jun Ren - 24 Pages.pdf - Submitted Version Download (491kB)

Abstract

Antenna is the most important component to transmit signal trough the free space in the wireless communication system. Circular polarization is one type of method to enable communication between antennas that has the benefit of reduce signal loss. However, those antennas that usually used to design circular polarization are had some limitations on the performances. There are also a lot of studies, such as multiple patch configuration, stacked multiple patch, and frequency selective surface had been done to improve the antenna performances. However, those techniques will have some shortcomings, like produce unstable radiation and increase the overall size of antenna. Meta-surface is 2D periodic planar structure of meta-materials that recently widely used in antenna communication. In this report, the method of loading meta-surface to enhance circular polarization antenna was proposed and presented. The designed circular polarized antenna was loaded with both one layer and two layers meta-surface to compare the results. One layer meta-surface is loaded a meta-surface on the source antenna, while two layers meta-surface is loaded two same structures of meta-surface on the source antenna. This method of meta-surface had been proved by some researchers to improve the performances of antenna. However, most of the researchers only focus either to improve or to convert the linear polarization antenna to become circular polarization. Therefore, this project will not only focus on all the antenna parameters but also remained the circular polarization of antenna. The simulation software, CST Studio Suite was used to simulate for the whole design process. The designed antenna and meta-surface were then fabricated and measured to verify the simulation result. By using two layers meta-surface, the bandwidth of designed antenna was improved while the gain and directivity had improved from 3.67dB to 6.66dB and 4.7dBi to 7.49dBi respectively at 2.4GHz.

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