Velocity tapering of comb-quad traveling-wave tubes
US4558256A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1983 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Jun 9, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J23/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The "comb-quad" slow-wave interaction circuit for a traveling-wave tube consists of a pair of metallic ladders whose rungs cross, the rungs of one ladder passing through the spaces between the rung of the other ladder. The phase velocity of the circuit wave is tapered to a lower value at the output end by gradually enlarging the axial open spaces between the longitudinal bases of the ladders and the surrounding envelope. The periodic elements of the ladders are all exactly alike, simplifying the construction. The slowing of the wave velocity is greater at the lower-frequency end of the passband, providing improved efficiency over the operating band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.