Design of array dielectric resonator antenna for long term evolution applications
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Date
2014-09
Authors
Lim, Seng Shin
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Abstract
This dissertation discusses design of aperture coupling linear array cylindrical dielectric resonator antenna (DRA) for 2.6 GHz Long Term Evolution (LTE) applications. The antenna design, technical challenge lies in designing a wide bandwidth, high gain, compact and efficient antenna performance for LTE applications. Most research on the wireless communication antenna design used microstrip patch antenna. The microstrip patch antenna design shows narrow bandwidth at millimeter wave operating frequency. Beside that the patch antenna metallic conductor loss become intense and the antenna efficiency performance may drop significantly. In order to solve this problem, the array cylindrical DRA was identified as a candidate because dielectric resonator antenna (DRA) has insignificant metallic loss compare to microstrip patch antenna and high dielectric constants of dielectric resonator also contribute to development low-profile antenna at microwave frequencies. In this research, the proposed designs were a single element slot aperture coupling cylindrical DRA, aperture coupling three elements linear array cylindrical DRA and third design was aperture coupling three elements stack materials linear array cylindrical DRA with different dielectric material constant. The cylindrical shape dielectric materials were CCTO dielectric material with dielectric constant 55 and Duroid 6010LM with dielectric constant of 10.2. The DRA configuration was used cylindrical shape dielectric resonator, slot aperture fed mechanism, ground plane, 50 ohm microstrip line on microwave
substrate Rogers 4003 with dielectric constant of 3.35 and height of 0.813 mm. This research work was focused on designing aperture coupling array cylindrical DRA and characterized array cylindrical DRA performance for LTE applications. A simulation tool, CST Microwave Studio (MWS) software was used to design, analyze and translate simulated output result to array DRA hardware fabrication. The fabricated array cylindrical DRAs were measured using a network analyzer to determine antenna operating frequency and impedance bandwidth. The DRAs far-field radiation pattern was measured by indoor antenna far-field radiation pattern setup. The resonance frequency of aperture coupling linear array cylindrical DRA was obtained at 2.6 GHz. The measured impedance bandwidth was 250 MHz and simulated antenna gain and radiation efficiency, erad were 8.29 dB and 0.96. Both the simulated and measured results show a good agreement. The stack dielectric materials linear array cylindrical DRA shows measured impedance bandwidth of 232 MHz or 8.95% and simulated antenna gain and radiation efficiency, erad results were 8.06 dB and 0.95. The proposed array cylindrical DRAs were demonstrated its performance to fulfill requirements for mobile telecommunication system operating in the frequency band between 2500 MHz to 2690 MHz for LTE applications in Malaysia.
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Keywords
Design of aperture coupling linear array cylindrical dielectric resonator antenna , for Long Term Evolution applications.