Title :
1.3: 220 GHz 50 W sheet beam travelling wave tube amplifier
Author :
Field, Mark ; Borwick, Robert ; Mehrotra, Vivek ; Brar, Berinder ; Zhao, Jinfeng ; Shin, Young-Min ; Gamzina, Diana ; Spear, Alexander ; Baig, Anisullah ; Barnett, Larry ; Luhmann, Neville ; Kimura, Takuji ; Atkinson, John ; Grant, Thomas ; Goren, Yehuda
Author_Institution :
Teledyne Sci., Thousand Oaks, CA, USA
Abstract :
In this paper we report on a development program aimed at producing a travelling wave tube amplifier with significant gain and power at 220 GHz in a compact and lightweight package. This paper provides an overview of the program, describing development of nanoparticle scandate cathodes with current densities exceeding 100 A/cm2, MEMS fabrication and test of mm-wave waveguides and slow-wave structures with bandwidths exceeding 50 GHz centered at 220 GHz, and the production of a sheet electron beam with a current density exceeding 230 A/cm2 and an aspect ratio of 26:1. These components may allow us to produce a 220 GHz, 50W high power amplifier with a hot bandwidth of > 20 GHz and a power-bandwidth product > 1000 W-GHz.
Keywords :
amplifiers; cathodes; electron beams; microfabrication; millimetre waves; slow wave structures; waveguides; MEMS fabrication; compact package; frequency 220 GHz; lightweight package; mm-wave waveguides; nanoparticle scandate cathodes; power 50 W; sheet beam travelling wave tube amplifier; sheet electron beam; slow-wave structures; Bandwidth; Cathodes; Current density; Electron beams; Micromechanical devices; Optical device fabrication; Packaging; Power amplifiers; Production; Testing; millimeter wave; mm-wave waveguide; scandate cathode; sheet electron beam; travelling wave tube;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-7098-3
DOI :
10.1109/IVELEC.2010.5503624
