Title :
Relationship between permittivity and loss tangent
Author_Institution :
General Post Office, Research Department, London, UK
fDate :
1/1/1971 12:00:00 AM
Abstract :
For a dielectric material, it can be proved that the change of permittivity between two frequencies f1 and f2 is given by ¿¿¿/¿¿¿1.5 tan ¿ log10 f2/f1 subject to certain conditions. Many published results, for diverse materials and frequencies, conform to this equation, even when the therotical conditions are not met; but, at microwave frequencies, there are many discrepancies, possibly because the published measurements are in error. An equation of similar type describes the effect of change of temperature.
Keywords :
dielectric losses; dielectric materials; dielectric properties of substances; loss-angle measurement; permittivity; dielectric losses at different frequencies; dielectric materials; loss tangent at different frequencies; permittivity and loss angle measurement; permittivity at different frequencies;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1971.0042
