Friesicke, ChristianChristianFriesickeQuay, RüdigerRüdigerQuayJacob, ArneArneJacob2020-09-022020-09-022015-10IEEE Microwave and Wireless Components Letters 10 (25): 7185478 (2015-10)http://hdl.handle.net/11420/7212This letter introduces a theory which considers the effect of lossy second-harmonic terminations on the voltage waveform, output power, and efficiency of power amplifiers (PAs) operated in the class-J mode. To this end, the conventional (reactive) class-J mode is extended to a resistive-reactive class-J mode with complex fundamental and second-harmonic load impedances. The theory is experimentally validated by performing on-wafer active load-pull measurements on an AlGaN/GaN HEMT power device with 0.25μ gate length and a total gate periphery of 6x200μ. The measured waveforms are de-embedded to the internal current-generator of the device, where they exhibit the theoretically predicted behavior.en1531-1309201510666668Class-Jlossespower amplifiers (PAs)Journal Article10.1109/LMWC.2015.2463211Other