Electric heating – Microwave heating – Waveguide applicator
Patent
1997-09-08
1998-11-10
Leung, Philip H.
Electric heating
Microwave heating
Waveguide applicator
219696, 219701, 219746, 219750, H05B 670, H05B 678
Patent
active
058347445
ABSTRACT:
An assembly for applying microwave irradiation to a load having a generally circular cross-section. The applicator supports a dominant TM.sub.120 mode and the load is aligned with a central axis in the applicator, with each aperture of a pair of feed apertures diametrically opposed (for the circular cross sectional case) or located on parallel opposed walls (for the polygonal cross sectional case) with one of the pair of feed apertures positioned at 90 degrees with respect to the other pair about the axis. The applicator may be formed as a cylinder or as a polygonal prism of the type having parallel opposed sides, such as those having a square, hexagonal or octagonal cross-section. Means such as a microwave transparent tube or conveyor provide for positioning of the load in the applicator. In an alternative embodiment, two cavities are used, with one cavity associated with each of the two feed systems, and a means for conveying the load from the first cavity to the second cavity is provided. In one octagonal cross section embodiment, the two feed aperture pairs are located in one cavity.
REFERENCES:
patent: 3461261 (1969-08-01), Lewis et al.
patent: 4129768 (1978-12-01), Anderson
patent: 4276462 (1981-06-01), Risman
patent: 4631380 (1986-12-01), Tran
patent: 4714812 (1987-12-01), Haagensen
patent: 4760230 (1988-07-01), Hassler
patent: 4777336 (1988-10-01), Asmussen
patent: 5400524 (1995-03-01), Crosnier Leconte
Leung Philip H.
The Rubbright Group
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