1. The document describes characterizing the output power, power added efficiency (PAE), and noise figure of a NE721 GaAs MESFET as a function of input and output matching conditions using load pull and noise figure measurements. 2. The optimum output match for gain is found to be Γout = 0.66/52° at Pin = -27dBm, but shifts to Γout = 0.66/36° at Pin = -4dBm (3dB compression point). 3. The optimum conditions are found to be Γout = 0.66/36° and Γin = 0.76/42° at Pin = -4dBm, producing