Alternative approach to the calibration of six-port reflectometers using four standards

Other researchers have proposed six-port reflectometer calibration procedures that require only four standards. The authors describe an alternative approach to the implementation of such a calibration routine. The standards required are a matched load, a short circuit and two offset terminations. Laboratory tests indicate that measurement accuracies of within +or-0.01 in magnitude and within +or-1 degrees in phase can be obtained.