Abstract-Experimental study on a cylindrical Dielectric Resonator Antenna (DRA) using barium titanate (BaTiO 3 ) is presented in this paper. The antenna is fed with a 50 Ω microstrip transmission line at frequency around 2.5 GHz. High dielectric constant (ε r = 1000) resonator samples with different thickness are employed. The return loss, input impedance and radiation patterns are studied. Design simulation results using CST software also presented.

* In 1989, the military government changed the English translations of many names dating back to Burma's colonial period. Among others, Burma was changed into Myanmar, Arakan into Rakhine and so forth. The research note uses the name Myanmar in accordance with the practice of the United Nations and the Association of Southeast Asian Nations. For consistency, the research note refers to the country's name as Myanmar. For names of places, the new names are given first and the old names are in parentheses.

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Abstract-In this paper, theoretical and simulation studies on rectangular and annular dielectric resonator antenna (DRA) made of TiO 2 was reported. The ceramic was fabricated by solid state reaction at 1200 • C. The structural and dielectric properties were investigated by X-Ray Diffraction (XRD), Field Emission Electron Microscopy (FESEM) and network Analyzer. The XRD results showed the presence of rutile phase and the microstructure comprised of fine grain (0.2-0.5 µm) and large grain 1.0-1.5 µm. The rectangular and annular shape TiO 2 DRA with high dielectric constant (ε = 84) and low loss tangent (0.080) were fed with 50 Ω microstrip transmission line and comparision between the various shape were investigated. The return loss, input impedance and radiation pattern TiO 2 DRA was studied. Design simulation results using CST Microwave Studio 2008 also was presented.