Uncertainty analysis of the transmission-type measurement of Q-factor

Uncertainty analysis of the transmission-type measurement of Q-factor

The transmission-type measurement of the Q-factor of a microwave resonator is analyzed with a goal of establishing uncertainty limits on the unloaded Q-factor. The three major sources of systematic errors which are discussed are: the instrumentation inaccuracy, the inequality of the input and output...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 1999-03, Vol.47 (3), p.367-371
Hauptverfasser: Kajfez, D., Chebolu, S., Abdul-Gaffoor, M.R., Kishk, A.A.
Format: Artikel
Sprache:eng
Schlagworte:
Coupling circuits
Coupling coefficients
Dielectric measurements
Equivalent circuits
Frequency
Impedance
Inequalities
Instrumentation
Inverters
Joining
Microwave measurements
Microwaves
Performance evaluation
Q factor
Resonators
RLC circuits
Systematic errors
Uncertainty
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Beschreibung
Zusammenfassung:The transmission-type measurement of the Q-factor of a microwave resonator is analyzed with a goal of establishing uncertainty limits on the unloaded Q-factor. The three major sources of systematic errors which are discussed are: the instrumentation inaccuracy, the inequality of the input and output coupling coefficient, and the effect of coupling losses. It is shown that, for tightly coupled resonators, the uncertainty of the transmission-type method is significantly increased.
ISSN:0018-9480
1557-9670
DOI:10.1109/22.750244