Unified and simplified treatment of techniques for characterising transmission, reflection or absorption resonators

Resonators are coupled to external circuits in different ways. It is possible to measure several magnitudes in each configuration, e.g., the transmission or reflection coefficients. There are different expressions that relate the measured magnitudes to the resonator´s characteristic parameters. The authors reduce many of these expressions to two basic forms, a scalar or vectorial expression, that permits a similar treatment. A brief description of a method for processing each expression and some results are presented.