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Progress In Electromagnetics Research
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UNIQUE PERMITTIVITY DETERMINATION OF LOW-LOSS DIELECTRIC MATERIALS FROM TRANSMISSION MEASUREMENTS AT MICROWAVE FREQUENCIES

By U. C. Hasar

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Abstract:
A non-resonant microwave method has been proposed for accurate complex permittivity determination of low-loss materials. The method uses two measurement data of the magnitude of transmission properties of the sample. While the first datum must correspond to a frequency point resulting in a maximum magnitude of transmission properties, the other can be any datum at a frequency different than the first datum and not far distant from the first datum. Two closed-from expressions are derived for a good initial guess using the above data. The limitations of each expression are discussed. The method has been validated by transmission measurements at X-band (8.2-12.4 GHz) of a low-loss sample located into a waveguide sample holder.

Citation:
U. C. Hasar, " unique permittivity determination of low - loss dielectric materials from transmission measurements at microwave frequencies ," Progress In Electromagnetics Research, Vol. 107, 31-46, 2010.
doi:10.2528/PIER10060805
http://www.jpier.org/PIER/pier.php?paper=10060805

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