Elhawil, A., Koers, G., Zhang, L., Stiens, J., & Vounckx, R. (2009). Comparison between two optimization algorithms to compute the complex permittivity of dielectric multilayer structures using a free space quasi-optical method in W-band. IET Science, Measurement & Technology, 3(1), 13-21. http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=ISMTCT000003000001000013000001&idtype=cvips&gifs=Yes

@article{6128753c8cc24031b98790f3b5527526,
title = "Comparison between two optimization algorithms to compute the complex permittivity of dielectric multilayer structures using a free space quasi-optical method in W-band",
abstract = "This paper describes two optimization algorithms used to calculate the complex permittivity and the thickness of individual dielectric layers of multilayered structure in the W-band. The algorithms are the genetic algorithm (GA) and the sequential quadratic programming (SQP) based on the quasi-Newton method BFGS (BFGS-SQP); the setup procedure of both algorithms is presented. A quasi-optical free space measurement system is used to measure the reflection and the transmission coefficients. The performance of the measurement setup is first tested using different single layer slabs. A detailed comparison between the two algorithms is reported.",
keywords = "Genetic algorithm (GA), Sequential quadratic programming (SQP)",
author = "Amna Elhawil and Gaetan Koers and Lixiao Zhang and Johan Stiens and Roger Vounckx",
year = "2009",
month = jan,
day = "1",
language = "English",
volume = "3",
pages = "13--21",
journal = "IET Science, Measurement & Technology",
issn = "1751-8822",
publisher = "Institution of Engineering and Technology",
number = "1",
}