Sanyo Electric Co., Ltd.

Gunze Kabushiki Kaisha

Yoshihiro Wada

Takeshi Yamamoto

Yoshiharu Omori

Katsuaki Hayami

Kuniyasu Kubo

Chizuko Konishi

Fusazo Wada

Hiroshi Yoshimura

Hideo Fujii

Kunio Kondo

Yoshitsugu Takada

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.

Microwave oven including antenna for radiating microwave

Film for print laminates and thermocompression bonding process therefor

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Shiga, Japan

Yoshihiro Wada