A microwave oven is disclosed herein that includes a cooking cavity and a magnetron. The magnetron includes a body portion having an anode, a cathode, one or more magnets, and an antenna extending from the body. The antenna directs microwaves generated by the body to the cooking cavity. The magnetron is movably coupled to a housing surrounding the cooking cavity and the magnetron. For example, in one embodiment, the magnetron oscillates along three perpendicular dimensions of mobility.