International Journal of Infrared and Millimeter Waves, 12, no.7 (July 1991): 659–675
A Model for the Complex Permittivity of Water at Frequencies Below 1 THz
doi: 10.1007/BF01008897Cite This Publication
Hans J. Liebe, George A. Hufford, and Takeshi Manabe, “A Model for the Complex Permittivity of Water at Frequencies Below 1 THz,” International Journal of Infrared and Millimeter Waves 12, no.7 (July 1991): 659–675. http://dx.doi.org/10.1007/BF01008897
Hans J. Liebe, George A. Hufford, and Takeshi Manabe
Abstract: Experimental permittivity data of liquid water, compiled from the open literature, were selectively applied to support a modeling strategy. Frequencies up to 1 THz and atmospheric temperatures are covered with an expression made up by two relaxation (Debye) terms. The double-Debye model reduces to one term when the high frequency limit is set at 100 GHz, and the model can be extended to 30 THz by adding two resonance (Lorentzian) terms. The scheme was carried out by employing nonlinear least-squares fitting routines to data we considered reliable.
Keywords: millimeter waves; radio wave propagation; complex permittivity; semi-empirical models
Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.
For questions or information on this or any other NTIA scientific publication, contact the ITS Publications Office at ITSinfo@ntia.gov or 303-497-3572.