Electric heating – Metal heating – Of cylinders
Patent
1980-08-15
1982-06-22
Grimley, Arthur T.
Electric heating
Metal heating
Of cylinders
H05B 672
Patent
active
043364349
ABSTRACT:
A microwave oven cavity excitation system which introduces circularly-polarized electromagnetic wave energy into a cooking cavity through a plurality of feed points appropriately phased to provide a concentrated beam. The relative phasing of the feed points is varied as a function of time to steer the concentrated beam to sweep the interior of the cavity, improving the time-averaged energy distribution. One form of phase shift element disclosed is a dielectric vane rotated by airflow through a feed waveguide within which the dielectric vane is rotatably mounted. As a result of the circular polarization, standing waves in the direction of one of the cavity dimensions are minimized, and the amount of energy reflected back to the generator may be reduced.
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General Electric Company
Grimley Arthur T.
Houser H. Neil
Reams Radford M.
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