Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1983-09-29
1985-11-19
Moore, David K.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 3, 315 5, 328233, 372 2, H01J 2500
Patent
active
045544832
ABSTRACT:
An RF cyclotron maser type traveling-wave amplifier including an integral active circulator. The amplifier includes a tapered interaction waveguide having a cross-section which gradually increases from a small first end to a larger second end thereof. The waveguide is capable of supporting first and second orthogonal polarization modes therein with approximately the same propagation characteristics for the two modes. A beam of mildly relativistic electrons having helical electron motion is directed into the small first end to axially propagate within the waveguide toward the larger second end. A tapered magnetic field is generated within the waveguide in a direction approximately parallel to the axis of the waveguide. The magnetic field is profiled to near grazing interaction with the second polarization mode of the waveguide. An input electromagnetic wave in the first polarization mode is launched into the larger second end of the waveguide to propagate toward the first end thereof. The input wave is reflected by the constriction of the tapered waveguide to co-propagate with the electron beam in the waveguide. The reflected input wave additionally excites energy in the second mode which also co-propagates with the electron beam. The first and second modes are amplified by the electron beam; the second polarization mode being amplified to a greater extent than the first mode. The two orthogonal modes are easily separated to provide input and output ports for the amplifier.
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Y. Y. Lau, L. R. Barnett and V. L. Granatstein, "Gyrotron Travelling Wave plifier I.V. Analysis of Launching Losses", Internal Journal of Infrared and Millimeter Waves, vol. 3, No. 1, 1982, pp. 45-62.
Kwo Ray Chu, Y. Y. Lau, Larry R. Barnett, "Theory of a Wide-Band Distributed Gyrotron Traveling-Wave Amplifier", IEEE Transactions on Electron Devices, vol. ED-28, No. 7, Jul. 1981, pp. 866-870.
Larry R. Barnett, "An Experimental Wide-Band Gyrotron Traveling-Wave Amplifier", IEEE Transaction on Electron Devices, vol. ED-28, No. 7, Jul. 1981, pp. 872-874.
Baird J. Mark
Barnett Larry R.
Lau Yue-Ying
Beers Robert F.
Ellis William T.
Forrest John L.
Moore David K.
Oen William L.
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