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Manfred Kummer

Some Topics of Measurement of Complex Permittivity for Lossy Dielectric Materials

Keywords: dielectrics, loss, sensor, calibration

Real electric materials may be described either as non-ideal (i. e. lossy) dielectrics or as non-ideal (i. e. κ<∞) conductors. The transition range (high-loss range) sometimes requires special attention. In this range remarkable effects are (a) appearance of auxiliary resonant frequencies in limited ranges of ε_r´ and tanδ, depending on the kind and amount of coupling and (b) transitions between waveguide modes (e. g. from E₀₁- to TEM-mode in a circular cavity with a centered rod of lossy dielectric). A few examples and their effect on e. g. calibration functions will be discussed.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 74, 05/2007
Pages: 268 - 274

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