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

Author

Kajfez, D. ; Chebolu, S. ; Abdul-Gaffoor, M.R. ; Kishk, A.A.

Author_Institution

Dept. of Electr. Eng., Mississippi Univ., MS, USA

Volume

47

Issue

3

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

367

Lastpage

371

Abstract

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

Keywords

Q-factor measurement; losses; measurement errors; microwave measurement; resonators; Q-factor; coupling losses; inequality; input coupling coefficient; instrumentation inaccuracy; microwave resonator; output coupling coefficient; systematic errors; tightly coupled resonators; transmission-type measurement; uncertainty analysis; uncertainty limits; Coupling circuits; Dielectric measurements; Equivalent circuits; Frequency; Impedance; Inverters; Microwave measurements; Performance evaluation; Q factor; RLC circuits;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.750244

Filename

750244