Title :
Peer-peer phase-locking of two L-band industrial heating magnetrons
Author :
Kato, Keith G. ; Brown, Kenneth W. ; Crouch, David D. ; Jones, George K. ; McDonald, Richard B. ; Wynn, Anthony P. ; Blank, David E. ; Campbell, Peter S. ; Lentz, Ronald R. ; Meredith, Roger J.
Author_Institution :
Adv. Electromagn. Technol. Center, Raytheon Co., Rancho Cucamonga, CA, USA
Abstract :
We demonstrate the peer-peer phase-locked operation of two matched industrial heating magnetrons. Two commercial off-the-shelf California Tube Laboratory model CWM-75L industrial heating magnetrons were "cherry picked" for identical operating voltage (17.5 kV), current (5.0 A), operating frequency (915 MHz), and output power (75 kW). Their microwave power outputs were cross-coupled by means of a four-port branch wall directional coupler and phase shifter. Coupling as low as -20 dB of each other\´s output powers was sufficient to create mutual locked operation between both magnetrons. These results suggest more than two matched magnetrons may be driven in a phased-locked condition.
Keywords :
UHF phase shifters; UHF tubes; directional couplers; magnetrons; microwave heating; phase locked oscillators; 17.5 kV; 5.0 A; 75 kW; 915 MHz; L-band industrial heating magnetrons; cross-coupled microwave power outputs; four-port branch wall directional coupler; magnetron peer-peer phase-locking; matched CWM-75L magnetrons; mutual locked operation; phase shifter; Directional couplers; Electromagnetic heating; Frequency; L-band; Laboratories; Magnetrons; Mutual coupling; Phase shifters; Power generation; Voltage;
Conference_Titel :
Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International
Print_ISBN :
0-7803-8261-7
DOI :
10.1109/IVELEC.2004.1316286
