Patent ID: 9603203
Date: 2017-03-21
CPC Classifications: H05B

Claim:
1. A microwave heating apparatus comprising: a tubular waveguide applicator having a first end and an opposite second end and a circular cross section and forming a heating chamber between the first and second ends with an axis along the centerline of the heating chamber; a microwave source; a waveguide feed connected between the microwave source and the tubular waveguide applicator at the first end to propagate microwaves through the tubular waveguide applicator from the first end to the second end with a TM a first cylindrical microwave choke connected in series with the tubular waveguide applicator at the first end and a second cylindrical microwave choke connected in series the tubular waveguide applicator at the second end, wherein the first and second cylindrical microwave chokes have open ends for products to be heated to enter and exit the tubular waveguide applicator through the first and second cylindrical microwave chokes; microwave-transparent centering elements disposed along the length of the heating chamber to confine the product within proximity of the axis of the heating chamber.