Historically, every microwave heating device, from a home microwave oven to a large industrial microwave system, has been powered by a magnetron tube. They have been around since the 1940s, and have remained functionally the same ever since. But many say that solid state is the microwave technology of the future, especially when it comes to drying and thermal processing applications in food, biomass, drying and laboratory use. That’s because magnetrons, while highly efficient in converting electric power into microwave energy, also have many disadvantages when compared to solid state microwave technology.