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

TY - GEN

T1 - Complex permittivity measurement of foam materials using a one-port network analyser measurement

AU - Marvin, Andy

AU - Dawson, John Frederick

AU - Cahill, B J

PY - 1998/9/14

Y1 - 1998/9/14

N2 - A method of complex permittivity extraction is proposed based on a singleone-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.

AB - A method of complex permittivity extraction is proposed based on a singleone-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.

M3 - Conference contribution

SP - 505

EP - 510

BT - Proceedings of EMC '98 Roma

CY - Rome

ER -