DEVICE FOR CIRCULARLY POLARISED FIELD EXCITEMENT IN MICROWAVE OVEN CHAMBER Russian patent published in 2008 - IPC H05B6/64 

FIELD: heating devices.

SUBSTANCE: invention relates to heating devices using microwave field energy. The microwave oven chamber circularly polarised field excitement device includes rectangular waveguide resonator (RWR) in whose plane the metallic rod of the microwave magnetron energy output is located, as well as a metallic rod with a pear-shaped end - the core conductor of the coaxial-waveguide transition (CWT). A flat equiangular logarithmic spiral antenna (SA) with two branches - left and right, made out of high-conductivity sheet metal and fed in phase, is connected to the coaxial output of the CWT. The SA includes the screen mounted and fixed at the outer conductor of the coaxial CWT section, electrically connected to the left SA branch at one point, and to the right SA branch at one point, as well as to the RWR.

EFFECT: providing heat source location uniformity index, with no relation of these parameters to the mass and location of the treated product inside the oven camera.

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