An oven, is provided that includes multiple heat transfer means, including
convection and microwave heat transfer means. The oven includes a cooking
chamber, a blower and at least a shelf disposed within the cooking
chamber. The shelf is designed to act as a food support as well as a
conduit through which heated air passes into the cooking chamber. The
microwave heating means comprises a microwave source and wave guide
through which microwaves travel. The wave guide includes a plurality of
openings through which microwaves can pass into said cooking chamber. In
the preferred embodiment, the openings in the wave guide are positioned
to correspond with the predetermined minima or maxima for the microwave
wavelength propagating within the wave guide. An electric heating element
may also be disposed within the cooking chamber to provide an alternative
heating source.