MICROWAVE TREATMENT APPARATUS

摘要

A microwave oven (50) is provided with a waveguide (3) including a first propagation part and a second propagation part, and a pair of openings provided on a side surface of a heating chamber (1), the openings providing communication between the waveguide (3) and the heating chamber (1). The first propagation part transmits microwaves toward the heating chamber (1), and the second propagation part transmits the microwaves in parallel to the heating chamber (1). The openings include a first opening (4a) and a second opening (4b), with circular polarized waves being generated. The first opening (4a) is provided so that at least some of the first opening (4a) overlaps a cross-section projection region (3c) demarcated by virtually projecting a cross-section of the first propagation part orthogonal to the tube axis of the first propagation part onto the side surface of the heating chamber (1) along the tube axis of the first propagation part. Circularly polarized waves or elliptically polarized waves are thereby more reliably generated using a compact waveguide.