Structural, microwave dielectric properties and dielectric resonator antenna studies of Sr(ZrxTi1−x)O3 ceramics

Highlights: ► XRD and Raman analysis show about phase transition of Sr(ZrxTi1−x)O3 ceramic. ► TE01δ cavity method is used for study of microwave properties of Sr(ZrxTi1−x)O3 ceramic. ► The microwave dielectric constant decreased from 253 to 25 and the value of τf changed from 1771 ppm/°C to −82 ppm/°C. - Abstract: Compositionally induced phase transitions in the system Sr(ZrxTi1−x)O3 were analyzed using a combination of X-ray diffraction, FT-Raman and FTIR spectroscopy. Sr(ZrxTi1−x)O3 system showed at least two tilting of phase transitions, pm3m–I4mcm and I4/mcm–pnma. The structural transition occurred due to tilting of BO6 octahedra. Dielectric constant measured with Hakki–Coleman technique decreased from 253 to 25 with increase of Zr content. The value of τf found 1771 ppm/°C for SrTiO3 which decreased to −82 ppm/°C for the SrZrO3. The dielectric resonator antenna (DRA) was investigated experimentally and numerically using a monopole antenna through an infinite ground plane and Ansoft's high frequency structure simulator software, respectively. The required resonance frequency and bandwidth of DRA were investigated in the composition between 0 ≤ x ≤ 1.0.