Microwave and Electrical Properties of Zr-Doped SrTiO₃ for Dielectric Resonator Antenna Application

Abstract:

Present investigation provides experimental studies on cylindrical dielectric resonator antennas (CDRAs) fabricated from SrTi_1-xZr_xO₃ ceramic with different substitution of Zr in place of Ti for (0 ≤ x ≤1). Ceramic powder were prepared using conventional solid state reaction method. X-ray Diffraction exposes physical properties Zr-doped SrTiO₃ which exhibit phase transition from cubic, tetragonal to orthorhombic phase. The electrical properties such as dielectric constant (ε_r) and dielectric loss (tan δ) were studied in variation of temperatures and frequencies. At room temperature the dielectric constant decreased from 240 to 21 with increase of Zr content however the amazing result was obtained for multiband antenna by Zr content. The dielectric loss obtain shows very low loss value roughly below 0.07 for all samples. The variations of return loss, resonance frequency and bandwidth of CDRAs at their respective resonant frequencies are studied experimentally.

• Periodical: Solid State Phenomena (Volume 280)
• Pages: 142-148
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.280.142
• Online since: August 2018
• Authors: Norhizatol Fashren Muhamad, Rozana Aina Maulat Osman, Mohd Sobri Idris, Faizal Jamlos, Nor Azura Malini Ahmad Hambali
• Keywords: Dielectric Resonator, DRA, Solid State Reaction, Strontium Titanate, Zirconium

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