Q Measurements-Two- and Four-Terminal Networks

Considering the equivalent circuit of a simple shunt-resonant four-terminal network, including loss, equations are derived permitting the calculation of unloaded and doubly loaded Q's, and the resonant frequency, from standing-wave-ratio or transmission-coefficient measurement at three arbitrary frequencies or wave-lengths. The equations are then put in a convenient form for data taken on a "triple-pipper impedance bridge." Finally, the equations are given for the same type of measurement for a two-terminal network, giving the unloaded and loaded Q's.