Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1982-07-06
1985-04-23
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 3, 315 5, 372 2, H01J 2500
Patent
active
045132232
ABSTRACT:
An electron-beam tube for generating high microwave power at high frequencies comprises a fast-wave circuit such as a hollow waveguide. The circuit wave has a component of electric field perpendicular to its propagation axis. This field interacts with motions of the electrons transverse to the axis, in particular cyclotron rotation in an axial magnetic field. The above features are common to the well-known "gyrotrons".
In the inventive tube the fast-wave circuit has means for locking a linearly polarized transverse-electric mode to the orientation of a circuit member such as the ridge in a ridged waveguide. The member (ridge) rotates spirally with distance along the guide. The added periodicity permits interaction with a space harmonic of the circuit wave. The -1 harmonic has a dispersion characteristic which provides beam-wave interaction over a wider frequency range than is possible in prior-art tubes of the gyrotron type.
REFERENCES:
patent: 3218503 (1965-11-01), Adler
patent: 3296484 (1967-01-01), Feinstein
patent: 3398376 (1968-08-01), Hirshfield
patent: 4199709 (1980-04-01), Alirot et al.
patent: 4225806 (1980-09-01), Le Gardeur
patent: 4392078 (1983-07-01), Noble et al.
patent: 4395655 (1983-07-01), Wurthman
"The Peniotron" by Moats et al., A Fast Wave Device for Efficient High Power mm Wave Generator 1978 International Electron Device Meeting, Washington, D.C. (Dec. 4-6 1978).
Chatmon Saxfield
Cole Stanley Z.
Nelson Richard B.
Varian Associates Inc.
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