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De-Embedding Method for Strongly Coupled Cavities


Peter, Ronny ; Fischerauer, Gerhard:
De-Embedding Method for Strongly Coupled Cavities.
In: IEEE Transactions on Microwave Theory and Techniques. Bd. 66 (April 2018) Heft 4 . - S. 2025-2033.
ISSN 0018-9480
DOI: https://doi.org/10.1109/TMTT.2018.2791934


The well-known cavity perturbation method, in which a cavity resonator is partially filled with a material sample is used to determine material parameters (permittivity, electrical conductivity and permeability) at microwave frequencies. These parameters are inferred from the differences in resonant behavior between the empty cavity and the material-loaded cavity. When applying the method, one has to couple the cavity to external measuring equipment (e.g., a vector network analyzer) to obtain the S-parameters of the cavity. The insertion of a coupling device (e.g., a thin stub) detunes the cavity. If the cavity is loaded with a large sample or if one has no access to the empty cavity – both cases may occur in in-process monitoring applications –, one must remove the detuning effect from measured S-parameters to produce accurate estimates of the sample material parameters. Several methods for this de-embedding have been proposed in the literature. They work well for loose or not-too strong coupling, but less so for strong coupling, which may occur in in-process monitoring situations. We have examined the known de-embedding procedures with respect to their ability of coping with strong coupling by thin stubs and propose a method that works in this case.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Cavity resonator; coupler; de-embedding; dielectric measurement; electromagnetic modeling; loaded resonant frequency; low Q; unloaded resonant frequency
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 06 Apr 2018 08:02
Letzte Änderung: 06 Apr 2018 08:02
URI: https://eref.uni-bayreuth.de/id/eprint/43228