Dielectric properties of ice at millimeter wavelengths

Details Dielectric properties of ice at millimeter wavelengths Dielectric properties of ice at millimeter wavelengths

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2311k&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 18, p. 2311-2314

Physics

6

Hydrology: Snow And Ice

Scientific paper

The use of radars to study the geophysical features in a polar environment requires reliable information about the relative complex dielectric permittivity, ɛ=ɛ'+iɛ'', of ice at microwave and millimeter-wave frequencies. To address this requirement, ɛ of ice at millimeter wavelengths was obtained using an interference technique. The interference pattern was produced by measuring the transmittance through bubble-free ice slabs at normal incident angle as the frequency was swept from 75 to 110 GHz. From the resulting interference patterns, ɛ' was determined to be 3.17+/-0.05 and virtually independent of frequency. Frequency-dependent absorption loss was observed such that ɛ'' increased from approximately 2.4+/-0.2×10-3 to 4.0+/-0.2×10-3 over the swept frequencies.

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