Apparatus and method for microwave processing of materials
Abstract
Disclosed is a variable frequency microwave heating apparatus designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency heating apparatus is used in the method of the present invention to monitor the resonant processing frequency within the furnace cavity depending upon the material, including the state thereof, from which the workpiece is fabricated. The variable frequency microwave heating apparatus includes a microwave signal generator and a high-power microwave amplifier or a microwave voltage-controlled oscillator. A power supply is provided for operation of the high-power microwave oscillator or microwave amplifier. A directional coupler is provided for detecting the direction and amplitude of signals incident upon and reflected from the microwave cavity. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 10 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 238065
- Patent Number(s):
- 5521360
- Application Number:
- PAN: 8-306,305
- Assignee:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 28 May 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; MATERIALS; FABRICATION; MICROWAVE EQUIPMENT; DESIGN; MICROWAVE HEATING; FREQUENCY MODULATION; POWER SUPPLIES; POWER LOSSES; MONITORING; PROCESS CONTROL
Citation Formats
Johnson, A C, Lauf, R J, Bible, D W, and Markunas, R J. Apparatus and method for microwave processing of materials. United States: N. p., 1996.
Web.
Johnson, A C, Lauf, R J, Bible, D W, & Markunas, R J. Apparatus and method for microwave processing of materials. United States.
Johnson, A C, Lauf, R J, Bible, D W, and Markunas, R J. Tue .
"Apparatus and method for microwave processing of materials". United States.
@article{osti_238065,
title = {Apparatus and method for microwave processing of materials},
author = {Johnson, A C and Lauf, R J and Bible, D W and Markunas, R J},
abstractNote = {Disclosed is a variable frequency microwave heating apparatus designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency heating apparatus is used in the method of the present invention to monitor the resonant processing frequency within the furnace cavity depending upon the material, including the state thereof, from which the workpiece is fabricated. The variable frequency microwave heating apparatus includes a microwave signal generator and a high-power microwave amplifier or a microwave voltage-controlled oscillator. A power supply is provided for operation of the high-power microwave oscillator or microwave amplifier. A directional coupler is provided for detecting the direction and amplitude of signals incident upon and reflected from the microwave cavity. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 10 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 28 00:00:00 EDT 1996},
month = {Tue May 28 00:00:00 EDT 1996}
}