Universiti Teknologi Malaysia Institutional Repository

Hybrid dielectric resonator antenna for ultra high frequency band

Abdul Sukur, Muhammad Ishak (2015) Hybrid dielectric resonator antenna for ultra high frequency band. Masters thesis, Universiti Teknologi Malaysia, Faculty of Electrical Engineering.

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Abstract

A hybrid Dielectric Resonator Antenna (DRA) design using the concept of the Dielectric-Resonator-on-Patch (DRoP) is presented in this thesis. This design is introduced to overcome the narrow bandwidth and big size drawbacks experienced by the antennas in the UHF band applications. The hybrid DRA has the ability to provide wide bandwidth while maintaining its compact structure. Firstly, two antenna designs which are the aperture-coupled square microstrip patch antenna (RMPA) and dielectric resonator antenna (RDRA) are presented to investigate the characteristic of the antennas individually. Two different aperture shapes, rectangular and circular are used to clarify the difference between them. Then, both antennas are combined together into the hybrid DRA structure. All three antennas are designed and optimized using Computer Simulation Technology (CST) microwave studio software and the Taconic RF-35 is used as the substrate for the prototype fabrication. The antenna performances such as the reflection coefficient magnitude (S11), bandwidth, radiation pattern and gain are measured. In the RMPA design, both configurations managed to obtain a compact size, with a reduction of more than 25% compared to the reference antenna. On the other hand, by maintaining the size of the DRA at 7cm × 7cm × 1.4cm, a wide bandwidth of around 30% is recorded using the circular aperture in the RDRA design. The hybrid DRA combined both RMPA and RDRA, resulting in wider bandwidth of 60%, from 0.77 to 1.43GHz with an average gain of 3.4dBi. The dimension of the dielectric resonator antenna is compact, which is 0.257λo and also low-profile with a height of 0.051λo.

Item Type:Thesis (Masters)
Additional Information:Thesis (Sarjana Kejuruteraan (Elektrik)) - Universiti Teknologi Malaysia, 2015; Supervisor : Prof. Dr. Mohamad Kamal A. Rahim
Uncontrolled Keywords:dielectric resonator antenna (DRA), dielectric resonator antenna (RDRA)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:54593
Deposited By: Muhamad Idham Sulong
Deposited On:07 Apr 2016 00:47
Last Modified:20 Oct 2020 02:32

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