Evaluation of the relative permittivity of BaxSr1-xTiO3ceramics at microwave frequencies using microstrip ring resonators

J. Z. Liu, Kin Wing Kwok, H. L.W. Chan, C. L. Choy

Research output: Journal article publicationJournal articleAcademic researchpeer-review


The microstrip-ring-resonance technique has been applied to determine the dielectric properties of high-permittivity barium strontium titanate (BaxSr1-xTiO3) ceramics at microwave frequencies. A microstrip ring resonator of diameter 5 mm has been fabricated on the ceramics by the standard photolithography process. The transmission coefficient S21spectra for the resonators have been measured using a vector network analyzer and simulated using a commercial electromagnetic simulation package, IE3D. By fitting the observed spectra to the simulated spectra, ε and tan δ of the BaxSr1-xTiO3ceramics have been determined. The results obtained by this technique are in agreement with those determined by other conventional methods. This technique is relatively simple, especially for high-permittivity materials, since there are less rigorous requirements on the sample and the test conditions.
Original languageEnglish
Pages (from-to)1033-1036
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Issue number7
Publication statusPublished - 1 Jan 2004

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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