Dow-Key Microwave Corporation is the world's largest manufacturer of electromechanical switches for radio frequency (RF) and microwave applications. Founded in 1945, we are also the oldest continuously operating RF/microwave switch manufacturer in the United States and are an operating company within Microwave Products Group (MPG), a subsidiary of Dover Corporation. Dover is a multi-billion dollar, NYSE-traded, diversified manufacturer of a wide range of proprietary electronic components and systems.