Abstract: Distributed high power solid state microwave sources are provided to improve the efficiency of microwave heating applications. A plurality of solid state microwave sources can be distributed throughout and/or adjacent to a microwave environment with the microwave power output of the solid state microwave sources being directed toward the chamber. The distribution of the plurality of solid state microwave devices can be customized to the specific size and shape of the microwave chamber and/or specific regions/compartments of the microwave chambers.