Electric heating – Microwave heating – Field modification
Patent
1991-11-14
1994-06-14
Reynolds, Bruce A.
Electric heating
Microwave heating
Field modification
219761, 219757, 363 17, 363132, 315 393, H05B 664
Patent
active
053212223
ABSTRACT:
A variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34) for testing or other selected applications. The variable frequency microwave furnace system (10) includes a microwave signal generator (12) or microwave voltage-controlled oscillator (14) for generating a low-power microwave signal for input to the microwave furnace. A first amplifier (18) may be provided to amplify the magnitude of the signal output from the microwave signal generator (12) or the microwave voltage-controlled oscillator (14). A second amplifier (20) is provided for processing the signal output by the first amplifier (18). The second amplifier (20) outputs the microwave signal input to the furnace cavity (34). In the preferred embodiment, the second amplifier (20) is a traveling-wave tube (TWT). A power supply (22) is provided for operation of the second amplifier (20). A directional coupler (24) is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load (28).
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Bible Don W.
Lauf Robert J.
Adams Harold W.
Hoang Tu
Martin Marietta Energy Systems Inc.
Reynolds Bruce A.
Skinner Martin J.
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