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Q Factor Measurements in MATLAB

Q Factor Measurements in MATLAB

By (author): Darko Kajfez
Copyright: 2011
Pages: 190
ISBN: 9781608071616

Hardback $274.00 Qty:
This highly valuable software and book package helps you understand and work with the Q factor (quality factor) of resonant cavities and transmission line resonators. You get the tools you need to design and test electrical filters and oscillators in the high frequency and microwave range. This powerful resource also helps practitioners measure permittivity and permeability of solid and liquid materials. The most accurate Q factor measurement procedure consists of fitting the measured data to a circle on the Smith chart. The accompanying book covers this procedure and describes three basic methods of measurement: reflection, reaction, and transmission. This practical software features time-saving programs in MATLAB language that accept the Touchstone file format of data measured with the network analyzer. The results of data processing contain the loaded and unloaded Q, the coupling loss ratio, and the uncertainty estimates caused by random errors. The open source code of the programs can be modified to fit your particular needs. You find clear examples of measured and simulated data files that help you fully understand how to use all the programs included.
Preface ; Theoretical Foundations - Foster 's Theorem. LCR Resonant Circuits. Lossy Microwave One-Port. Q Factor Definitions. Q Circles. Fractional Linear Curve Fitting. Lossless Coupling. Correction for Coupling Losses. ; Reflection Measurement Method - Program Q0REFL. Using Q0REFL on Validation Data. ; Reaction Measurement Method - Equivalent Circuit and the Corresponding Q Circles. Program Q0REAC. Generating the Validation Data. De-Embedding Resonator 's S Matrix. Program DEREAC. Program DEREACPL. ; Transmission Measurement Method - Equivalent Network for Transmission Type Measurement. Program Q0TRAN. ; Appendices. About the Author. Index ;
  • Darko Kajfez Darko Kajfez is an emeritus professor of electrical engineering at the University of Mississippi. He earned his Dipl. Ing. degree in electrical engineering from the University of Ljubljana, Slovenia and his Ph.D. from the University of California, Berkley.
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