Linear electron beam tubes arrangements
US5536992A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1995 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | Nov 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J23/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inductive output tetrode includes a cylindrical ceramic envelope within which is located an electron gun including a cathode and grid. An annular resonant input cavity into which a high frequency signal is coupled surrounds the envelope and is located adjacent the electron gun so as to provide a modulating electric field in the cathode-grid region to density modulate the electron beam. The input cavity is connected to two metal cylinders arranged immediately adjacent to the outside of the envelope. Metallic portions located within the envelope are co-extensive with cylinders with the material of the envelope 1 being located between them. These structures act as r.f. chokes to reduce high frequency losses from the input cavity. Tuning of the resonant cavity may be achieved by adjusting a tuning member which is at distance of quarter of a wavelength at the resonant frequency from the cathode-grid region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.