Title :
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
fDate :
3/1/1999 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
