Coupled-waveguide microwave applicator for uniform processing

Electric heating – Microwave heating – Tunnel furnace

Reexamination Certificate

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C219S678000

Reexamination Certificate

active

10846345

ABSTRACT:
An apparatus providing uniform microwave processing of products especially those that are likely to absorb microwave energy such as meat and the like. The apparatus uses at least a pair of complimentary processing waveguides. The waveguides are offset along at least one axis thereof so that the energy coupled to the product when traveling through a first waveguide section is presented with a complimentary or mirror image of the field variation applied to the product when traveling in the second waveguide. Energy may be fed to the elongated waveguides through a broad open wall or a wall having narrow openings. Coupling values can therefore be adjusted to transfer a higher percentage of energy in the feeder waveguide as microwaves propagate but then are diminished by a previous coupling section.

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patent: 6583394 (2003-06-01), Araya et al.
patent: 6590191 (2003-07-01), Drozd et al.
patent: 6863913 (2005-03-01), Navin et al.

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