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Loss tangent of motor oil at 10 GHz
Author(s) -
Kajfez Darko,
Reed Mark W.,
Smith Charles E.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990405)21:1<15::aid-mop5>3.0.co;2-9
Subject(s) - dissipation factor , microwave , tangent , relative permittivity , dielectric , permittivity , dielectric loss , engineering , materials science , acoustics , electrical engineering , physics , optics , mathematics , geometry , telecommunications
The complex permittivity of liquids is measured with a microwave cavity. The measurements are conducted for the TE 111 , TE 112 , TM 010 , and TM 011 modes in a circular cylindrical cavity. The loss tangent of the dirty oil (after 6000 mi) is found to be three times higher than the one of the clean oil. The relative dielectric constant is not noticeably effected. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 15–18, 1999.