2.45 GHz ISM-Band 450W High Efficiency GaN Pallet Amplifier for Microwave Heating

In this paper, 2.45 GHz ISM-Band high power and high efficiency GaN pallet amplifier for Microwave Heating is presented. To realize higher efficiency of the GaN high-power amplifier (HPA), we used both the input and output second harmonic reflection circuit in pallet amplifier. The fabricated pallet amplifier showed excellent performance, which is output power of 450 W and efficiency of 70 % with CW operation at the 2.45 GHz. To the authors knowledge, this is one of the highest level oerformance amons ever-reoorted ones.