| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact microwave heating device that is configured to be capable of uniformly heating a heating target in a heating chamber, particularly a heating target mounted at a center area of the heating chamber and also can perform local heating.SOLUTION: A waveguide structure antenna (5) of a microwave heating device has a waveguide structure portion (8) which is rotatably joined to a joint portion (7). A microwave draft opening (14) which is formed in the waveguide structure portion (8) and radiates circular polarization waves is configured by an opening in which at least two elongated holes intersect to each other. At the microwave draft opening, the length of the opening extending from the intersection position in an approaching direction to the joint portion is set to be shorter than the length of the opening extending from the intersection position in a direction other than an approaching direction from the joint portion.SELECTED DRAWING: Figure 3 |
