Single-Port Technique for Adaptor Efficiency Evaluation

The `single-port adaptor efficiency evaluation' (SPAEE) technique uses swept-frequency measurements to evaluate broadband efficiency of low-loss, reciprocal 2-ports, including noninsertable devices such as adaptors. The 2-port is terminated in two reflective terminations, a shielded open and a short. The value of the intrinsic efficiency as a function of frequency is extracted from the automatic network analyzer S11 data. The frequency range is limited only by the availability of the two reflective terminations. The major advantages of the SPAEE technique are its simplicity, speed, and accuracy. The expanded uncertainty (k=2) is typically about 1.5%.