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

fYear

2004

fDate

27-29 April 2004

Firstpage

230

Lastpage

231

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International

Print_ISBN

0-7803-8261-7

Type

conf

DOI

10.1109/IVELEC.2004.1316286

Filename

1316286