Amplifying arrangements which modulate an electron beam
US5281923A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Jul 16, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/56
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifying arrangement employs both density and velocity modulation of an electron beam in order to produce amplification of a high frequency signal. In one embodiment, density modulation is produced at the cathode region, a first carrier signal being applied between a cathode and a modulation grid to produce bunching of electrons. The density modulated electron beam is then velocity modulated at a first resonant cavity. It is preferred that the first carrier signal is twice the frequency of the carrier signal producing the velocity modulation. The arrangement may be such that, at the final resonant cavity, adjacent electron bunches produced by density modulation combine, thus giving a high efficiency amplifying arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.