Title: Accuracy comparison of the multifrequency and the three frequencies computations of loss tangent and relative permittivity of low loss dielectric materials using the dielectric resonator technique
Abstract: This paper discusses the measurement accuracy of the loss tangent and the relative permittivity of low loss dielectrics. Typically used the 3 dB method combined with the Insertion Loss computations has been compared with the more precise Transmission Mode QFactor Technique for measurements of tan of Rexolite, Polyethylene, LSAT, CaF₂, Teflon, YVO₄ and SLAO at room temperature. Also for teflon, rexolite and polyethylene we conducted the comparison for temperatures from 24K to 84K. For teflon (with tan below 6·10₋₆) errors up to 100% have been obtained; but for dielectric with tan above 5·10₋₅, errors were below 5%. For ∑(r) measurements, errors introduced by the thermal expansion coefficient have been analysed and found to be between 2.4% and 3.5%.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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