High-frequency heating apparatus.

摘要

A high-frequency heating apparatus in which a waveguide (13) having a rectangular terminating opening a x b is coupled with a heating chamber (1) perpendicularly at the bottom wall (3) thereof. The waveguide (13) is excited in a TEO,nmode (n is any positive integer), and a turntable (10) of dielectric material having a rotating center (Mo) is located on a bisector between the crest (loop) and the valley (node) of this mode. A horizontal electric field is generated along the upper surface of the turntable (10), thereby strongly heating the center of the bottom surface of an article to be heated and improving the uniformity in heating of the article.