Microwave heating method and apparatus including adjustable tuni

Details Microwave heating method and apparatus including adjustable tuni Microwave heating method and apparatus including adjustable tuni

1979-11-27

1982-04-13

Grimley, Arthur T.

Electric heating

Metal heating

Of cylinders

219 1055A, 219 1055M, H05B 670

Patent

active

043249655

ABSTRACT:
A method and apparatus for matching a microwave heater to reduce the microwave energy reflected by the load, wherein microwave energy from a microwave energy source is supplied to a treatment chamber by a hollow waveguide of rectangular section. A directional coupler in the waveguide prevents reflected energy returning to the source and directs it to absorption means. A detector is provided at the absorption means to measure the reflected energy and produce a signal, and control means is provided to operate control motors to operate tuning pins provided in the waveguide, the control motors having different operating speeds.

REFERENCES:
patent: 3413433 (1968-11-01), Timmermans et al.
patent: 3757070 (1973-09-01), Van Koughnett et al.
patent: 3764768 (1973-10-01), Sayer, Jr.
patent: 4093840 (1978-06-01), Jean et al.
patent: 4099042 (1978-07-01), Jean et al.
patent: 4179595 (1979-12-01), Ciron
patent: 4198554 (1980-04-01), Wayne

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