| 摘要 |
PROBLEM TO BE SOLVED: To provide a microwave heating device capable of improving reliability of a waveguide structure antenna.SOLUTION: A waveguide structure antenna in a microwave heating device guides microwaves of a transmission part to a space of a waveguide structure, and it includes a connection part capable of rotating by a rotation drive part, and a waveguide structure part connected to the connection part and for regulating a space of the waveguide structure. The waveguide structure part includes a microwave extraction opening formed as an opening in which at least two long holes cross each other, so as to form the microwaves in the space of the waveguide structure into circularly polarized waves, and radiate toward a heating part. In the shape of at least one of the long holes of the microwave extraction opening, a cross portion is larger than an end part.SELECTED DRAWING: Figure 11B |
