Electric heating – Metal heating – Of cylinders
Patent
1982-03-30
1984-07-03
Envall, Jr., Roy N.
Electric heating
Metal heating
Of cylinders
H05B 672
Patent
active
044581262
ABSTRACT:
A microwave oven with a dual feed excitation system comprising in one form of the invention a rotating antenna supported from the top cavity wall and a slotted radiating chamber supported from the bottom cavity wall. The antenna and radiating chamber are coupled to the magnetron output probe by a waveguide having a central section for receiving energy from the magnetron probe; a first section for coupling energy from the central section to the antenna and a second section for coupling energy from the central section to the radiating chamber. The fractional apportionment of the total energy from the magnetron between antenna and radiating chamber is a function of the impedance presented by each. The impedance of the antenna varies as the antenna rotates. The impedance of the chamber is particularly sensitive to food load parameters such as dielectric constant, which changes as the food cooks. Thus, the fractional distribution of energy between antenna and chamber varies during the cooking process, resulting in improved cooking performance.
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Dills Raymond L.
Fitzmayer Louis H.
Hunt Royce W.
Envall Jr. Roy N.
General Electric Company
Houser H. Neil
Lateef M. M.
Reams Radford M.
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