Field-emission cathode, with optical control
US8035295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2005 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Nov 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2223/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an optically-controlled field-emission cathode, comprising a substrate (10, 20, 30, 40, 50, 60, 70, 80, 90, 100) having at least one conducting surface (11, 21, 31, 41, 51, 61, 71, 81, 91, 101) and at least one conducting emitter element (16, 26, 36, 46, 56, 66, 76, 86, 96, 106) in the vicinity of a conducting surface, characterized in that it also comprises at least one photoconducting element (13, 23, 33, 43, 53, 63, 73, 83, 93, 103) electrically connected in series between at least one emitter element and a conducting surface of the substrate. Another subject of the invention is an amplifier tube comprising such a cathode. The application is for Vacuum tubes, in particular for microwave amplification, with a view for example to applications in telecommunications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.