Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1984-03-20
1986-01-28
Grimm, Siegfried H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
3133601, 315 542, 315 551, 328227, H01J 2510
Patent
active
045674523
ABSTRACT:
A broad-band beam buncher is disclosed, comprising an evacuated housing, an electron gun therein for producing an electron beam, a buncher cavity having entrance and exit openings through which the beam is directed, grids across such openings, a source providing a positive DC voltage between the cavity and the electron gun, a drift tube through which the electron beam travels in passing through such cavity, grids across the ends of such drift tube, gaps being provided between the drift tube grids and the entrance and exit grids, a modulator for supplying an ultrahigh frequency modulating signal to the drift tube for producing velocity modulation of the electrons in the beam, a drift space in the housing through which the velocity modulated electron beam travels and in which the beam is bunched, and a discharge opening from such drift tube and having a grid across such opening through which the bunched electron beam is discharged into an accelerator or the like. The buncher cavity and the drift tube may be arranged to constitute an extension of a coaxial transmission line which is employed to deliver the modulating signal from a signal source. The extended transmission line may be terminated in its characteristic impedance to afford a broad-band response and the device as a whole designed to effect broad-band beam coupling, so as to minimize variations of the output across the response band.
REFERENCES:
patent: 2860279 (1958-11-01), Hester et al.
patent: 3177440 (1965-04-01), Marcuse
patent: 3178653 (1965-04-01), Smith
patent: 3289033 (1966-11-01), Saburi
patent: 3904917 (1975-09-01), Ueda
Arthur Allan A.
Flood William S.
Goldberg David A.
Voelker Ferdinand
Clouse, Jr. Clifton E.
Gaither Roger S.
Grimm Siegfried H.
Hightower Judson R.
The United States of America as represented by the United States
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