Electric heating – Microwave heating – Field modification
Patent
1997-03-07
1999-12-07
Leung, Philip H.
Electric heating
Microwave heating
Field modification
219695, 219746, 219738, 219693, H05B 678
Patent
active
05998774&
ABSTRACT:
The present invention utilizes dielectric slabs to provide a relatively uniform electromagnetic field to a cavity between two or more dielectric slabs. Each dielectric slab is a thickness equal to or nearly equal to a quarter of a wavelength of the electromagnetic field in the dielectric slab. In a particular embodiment, sample material is introduced into the cavity between the two dielectric slabs. This sample material may be introduced through one or more openings in the dielectric slabs. In further embodiments, specialized choke flanges prevent the leakage of energy from this cavity. In a preferred embodiment, an elliptical conducting surface directs the electromagnetic field to a focal region between the two dielectric slabs. Openings to this focal region allow sample material to be passed through this region of focused heating.
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Drozd J. Michael
Joines William T.
Industrial Microwave Systems, Inc.
Leung Philip H.
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