Method of determining the wall conductivity of a multimode microwave applicator

S. H. Gold, A. W. Fliflet, D. Lewis, R. W. Bruce, N. A. Zharova, V. E. Semenov

Research output: Contribution to journalArticlepeer-review


The results for the estimation of the effective surface conductivity of the walls of a multimode microwave cavity applicator, based on measurements of reflected power from the cavity, were analyzed. The power reflection coefficient from an overmoded cylindrical applicator cavity as a function of the wall conductivity was found by a method based on the expansion of the total microwave fields in the eigenmodes of the cylindrical waveguides. It is found that a comparison of the average reflectivity over a broad frequency interval containing many cavity resonances combined with a calculation of microwave reflectivity as a function of surface reflectivity. This is the best means of determining the effective conductivity of the walls.

Original languageEnglish (US)
Pages (from-to)2678-2685
Number of pages8
JournalReview of Scientific Instruments
Issue number8
StatePublished - Aug 2004
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation

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