Virtually since the inception of the "radio", Q (the "Quality" factor) has been an important metric for quantifying RF components.
The Vector Network Analyzer is an essential tool for today’s RF design work. Therefore, they are accessible by virtually all RF designers. By post-processing VNA measurements, the functionality of the Q meter can be duplicated, and extended to higher frequencies and improved accuracy as well.

This MATLAB Q Measurement Tool (QMT) to be described is based on the excellent paper by professor Darko Kajfez published in the late 1990’s: http://www.walkingitaly.com/radio/RADIOSITO/za_fatti/tutorial/q/old/rfqmeas2b.pdf