Method and apparatus for uniform microwave bulk heating of thick viscous materials in a cavity.

摘要

A method and apparatus for uniform bulk heating of thick viscous materials in a cavity (5) not specifically designed for microwave heating. Microwaves are passed through a first waveguide (2) to a polarization rotator (3). The direction of polarization of the incoming waves is rotated slowly and continuously and subsequently the rotated waves are passed through a second waveguide (4) to the cavity (5) to be heated.