Direct determination of PE and PAE of an Active patch antenna

In this paper, the power added efficiency and/or the power efficiency of an active antenna was measured using a specially devised setup. This was based on previous work by the authors whereby the power input to a radiating element of an active patch antenna was measured using a small sensing patch. Combined with an estimate of patch radiation efficiency, the method also yields a measurement of total radiated power. Because of weakly frequency-dependant calibration factor, the method has advantages of convenience and can be integrated with modern computer based measurement systems.