Dielectric property measurement using a resonant nonradiative dielectric waveguide structure

Khalid Z. Rajab, Kuen Fwu Fuh, Raj Mittra, Michael Lanagan

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


This letter describes a new dielectric characterization technique, based on the resonant nonradiative waveguide structure described by Yoneyama and Nishida [1], for permittivity measurements at microwave and mm-wave frequencies. The measurement system is modeled as a resonator comprised of two parallel conducting plates with a rectangular dielectric slab sandwiched in-between. Resonant frequencies of the longitudinal section electric (LSE) modes and the unloaded Q of the cavity are used to determine the permittivity of the dielectric and its loss tangent, respectively. The technique is shown to be accurate for measuring the dielectric properties of a wide array of polymer and oxide materials. For materials with small dielectric loss tangents, an accuracy of better than ±0.4% is attained in the measurement of the relative dielectric constant of the material.

Original languageEnglish (US)
Pages (from-to)104-106
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number2
StatePublished - Feb 2005

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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