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Efficiency enhancement of octave-bandwidth traveling wave tubes by use of multistage depressed collectors
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Fox, T. A. Ramins, P. |
| Copyright Year | 1979 |
| Description | Small, three- and five-stage depressed collectors were evaluated in conjunction with a 4.8- to 9.6-GHz TWT of 325- to 675-W power output and a beam of 0.5 microperv. The multistage depressed collector (MDC) performed well even though its design had been optimized for a TWT of identical design but considerably less output power. Despite large, fixed losses significant efficiency enhancement was demonstrated with both the three- and five-stage depressed collectors. At saturated rf power output, the improvement in the overall efficiency ranged from a factor of 2.5 to 3.0 for the three-stage collector and a factor of 3.0 to 3.5 for the five-stage collector. At saturation three-stage collector efficiencies of 77 to 80 percent and five-stage collector efficiencies of 81 to 84 percent were obtained across the frequency band. An overall efficiency of 37.0 to 44.3 percent across the frequency band of 4.8 to 9.6 GHz was demonstrated with the use of harmonic injection. For operation below saturation, even larger relative improvements in the overall TWT efficiency were demonstrated. Collector performance was relatively insensitive to the degree of regulation of the collector power supply. |
| File Size | 1252868 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790008968 |
| Archival Resource Key | ark:/13960/t91883n23 |
| Language | English |
| Publisher Date | 1979-02-01 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Radio Frequencies Electron Beams Traveling Wave Tubes Efficiency Accumulators Focusing Saturation Polarization Waves Electronic Equipment Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
