Complex permittivity measurement of foam materials using a one-port network analyser measurement

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A method of complex permittivity extraction is proposed based on a single
one-port vector sample measurement for non-magnetic media applicable to carbon
doped foams for example. The reflection data is numerically processed to allow
for non-coincidence of the measurement and calibration plane and is suitable
for both transmission line and wave-guide measurement schemes. Extraction of the
parameters is based on a genetic algorithm optimiser with a suitable error
function as the solution is non-analytic and the error surface is not
unconditionally suitable for a simple gradient technique. Unlike descent descent methods the genetic algorithm handles local minima in an efficient manner.
Original languageEnglish
Title of host publicationProceedings of EMC '98 Roma
Place of PublicationRome
Publication statusPublished - 14 Sept 1998

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