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Verfasst von:Bohleber, Pascal [VerfasserIn]   i
 Wagner, Norman [VerfasserIn]   i
 Eisen, Olaf [VerfasserIn]   i
Titel:Permittivity of ice at radio frequencies
Titelzusatz:Part I. Coaxial transmission line cell
Verf.angabe:P. Bohleber, N. Wagner, O. Eisen
Umfang:12 S.
Fussnoten:Gesehen am 05.10.2018
Titel Quelle:Enthalten in: Cold regions science and technology
Jahr Quelle:2012
Band/Heft Quelle:82(2012), S. 56-67
Abstract:At radio-frequencies, measurements of the permittivity of ice are sparse and with unknown or large uncertainty. Coaxial transmission lines have been established for frequency-dependent permittivity determination for a broad variety of materials. Here we present a coaxial transmission line setup originally designed for soil samples, now adapted for measuring ice samples between 10MHz and 1.5GHz. Measured scattering parameters are assessed for artifacts against a forward calculation based on transmission line theory. A Debye-type relaxation function for the complex permittivity is assumed to obtain the permittivity of ice from the measured full set of four scattering parameters by means of a genetic optimization algorithm. The algorithm is successfully validated against quasi-analytical and iterative computation techniques with reference measurements of a low-loss Teflon standard. Based on the forward calculation and the Teflon standard, the total uncertainty for measuring the real part of the permittivity is estimated to be around 1%. Additional measurements of reference materials air, water, ethanol and methanol are used for validation. The real part of the permittivity of eight artificial pure ice samples is found frequency-independent between 10MHz and 1.5GHz at −20°C, with a mean value of 3.18±0.01.
DOI:doi:10.1016/j.coldregions.2012.05.011
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Verlag: http://dx.doi.org/10.1016/j.coldregions.2012.05.011
 Verlag: http://www.sciencedirect.com/science/article/pii/S0165232X12001127
 DOI: https://doi.org/10.1016/j.coldregions.2012.05.011
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1581579977
Verknüpfungen:→ Zeitschrift

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