Patent ID: 7528353
Filing Date: 2009-05-05
Classification: H05B

Abstract:
1. A microwave heating device for at least one heating load, the microwave heating device comprising: a cylinder-shaped cavity enclosed by a periphery wall, said cavity including a microwave feeding device; and a dielectric wall structure arranged inside said cavity between said periphery wall and said at least one load, wherein said microwave feeding device is arranged to generate a microwave field being an arch surface hybrid mode having TE and TM type properties inside said cavity to heat the at least one load, wherein the feeding device includes a radially directed coaxial antenna and the microwave field is fed to the feeding device using an Hz component of the microwave field, wherein a thickness of the dielectric wall structure is dimensioned to balance between components of the hybrid mode in relation to a permittivity of the dielectric wall structure such that a substantial part of oscillating energy of the microwave filed is bound to a periphery region of the dielectric wall structure.