Extended spectral domain approach for analysis of lossy cylindrical dielectric resonators

Ao Sheng Rong, Cao Yang

Research output: Contribution to journalArticlepeer-review


The spectral domain approach is extended for evaluating both the resonant frequency and Q factor of a lossy cylindrical dielectric resonator operating in TE0 modes, taking into account the effects of conducting enclosure and supporting substrate. On the basis of the equivalence principle, the circular electric currents are introduced to simulate the fields inside and outside the cylindrical dielectric sample, which separates the original problems into two auxiliary structures with radially homogeneous multilayered dielectrics. Using the spectral immittance method in conjunction with the point-matching method, the characteristic equations are derived. The present technique has no need to determine the time-consuming, complex higher-order modes. Some typical examples are computed. The numerical results agree well with experimental data available in the literature.

Original languageEnglish (US)
Pages (from-to)486-488
Number of pages3
JournalElectronics Letters
Issue number6
StatePublished - Mar 14 1991


  • Dielectric devices
  • Resonators

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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