Abstract: The present invention relates to a microwave heating device, and in particular, a microwave heating device with a microwave heating element mounted on the surface of a heating dish on which food is placed inside a heating chamber. The microwave heating device according to the present invention includes a heating chamber for placing an object to be heated; a magnetron for generating microwaves; a waveguide for supplying the microwaves generated by the magnetron through the bottom of the heating chamber; a heating dish on which the object to be heated is placed; a microwave heating element positioned on the bottom surface of the heating dish to generate heat by absorbing microwaves; and an access passage for allowing the microwaves supplied by the waveguide to reach above the heating dish from below the heating dish. The object on the heating dish is heated by the heating dish, which is heated by the microwave heating element and by microwaves that reach above the heating dish.

Abstract: An opening is formed in a right side of a heating chamber. The opening is covered by a protection cover. A waveguide is connected to the opening. A magnetron is connected to the waveguide. The magnetron has a magnetron antenna. An emission antenna is arranged around the magnetron antenna. A rotating plate is mounted to the protection cover. A plurality of diffusion antennas are mounted to the rotating plate. The diffusion antennas are arranged from the waveguide to the heating chamber.

Abstract: The present invention relates to a microwave heating device, and in particular, a microwave heating device with a microwave heating element mounted on the surface of a heating dish on which food is placed inside a heating chamber.

Abstract: An opening is formed in a right side of a heating chamber. The opening is covered by a protection cover. A waveguide is connected to the opening. A magnetron is connected to the waveguide. The magnetron has a magnetron antenna. An emission antenna is arranged around the magnetron antenna. A rotating plate is mounted to the protection cover. A plurality of diffusion antennas are mounted to the rotating plate. The diffusion antennas are arranged from the waveguide to the heating chamber.

Abstract: A microwave oven includes a cavity in which food is accommodated, a magnetron for generating microwaves, and a waveguide to supply microwaves generated from the magnetron into the cavity. The waveguide has substantially a truncated cone configuration in which the cross sectional area at the cavity side is greater than the cross sectional area at the magnetron side, and an output antenna of the magnetron is disposed to project from the bottom of the waveguide at the magnetron side into the inner space of the waveguide. The microwave oven further includes a flat radiation antenna fixed in the inner space of the waveguide around the output antenna of the magnetron while maintaining distances from the waveguide and the output antenna of the magnetron in which no spark is generated. Therefore, the radiation area for emitting the microwaves is increased significantly to improve heating nonuniformity within the cavity.