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Title:	Design and development of compact metamaterial inspired antenna for bluetooth, wifi and wimax applications
Authors:	Md. Mehedi Hasan (P86097)
Supervisor:	Mohammad Rashed Iqbal Faruque, Dr.
Keywords:	Radio -- Antennas Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	22-May-2018
Description:	Metamaterials are artificial composite materials consisted by the array of periodic unit cells raises attention in the scientific community due to their exotic electromagnetic properties, such as negative refraction, double negative characteristics and hirality. The conventional antennas are not suitable for embedding in portable devices because of their large dimension, lower bandwidth, gain and efficiency, whereas metamaterial antennas have compact size, wide bandwidth, higher gain, efficiency as well as better radiation characteristics. With the technological development, miniaturization of electronic devices has great importance, especially in order to develop light-weight portable devices, but the design of compact antennas with high performances are still a challenge to the researchers. Hence, the main aim of this thesis is to deeply analysis, design and development of compact metamaterial inspired antennas improve the performance of Bluetooth, WiFi and WiMAX applications. Finite integration technique (FIT) and Finite difference time domain (FDTD) based CST microwave studio electromagnetic simulator is adopted for the design and investigation of individual metamaterial structure and metamaterial inspired antenna. The designed metamaterial structures are characterized by Nicolson-Ross-Weir (NRW) method using the extracted effective parameters (permittivity, permeability and refractive index) from the scattering parameters. Different physical parameters are studied for these topologies with both numerical and measured results and the working mechanisms are explained in detail. In the first design, antenna is embedded in the square-circular split ring resonator metamaterial structure and the measured results show applicable for Bluetooth (2.40~2.48 GHz), WiFi (2.41~2.48 GHz) and WiMAX (3.40~3.79 GHz) band of frequencies. Further, in the second design square Z-shaped metamaterial structure is incorporated with a compact antenna, where the measured result exhibits applicable for Bluetooth (2.40~2.49 GHz), WiFi (2.41~2.48 GHz) and WiMAX (3.30~3.80 GHz) applications. The gain and efficiency of the proposed metamaterial antennas are measured in Satimo Star Lab, UKM. It has been observed that antennas achieve a satisfactory maximum gain around 2.25 dBi, efficiency 85% and omnidirectional radiation patterns with perfect time domain behaviors. Finally, the simulations and experiments performances are established that the designed metamaterial antennas are well suited for Bluetooth, WiFi and WiMAX communication systems.,Master Of Science
Pages:	110
Call Number:	TK6565.A6H337 2018 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Institute of Climate Change / Institut Perubahan Iklim

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