Thursday, December 8, 2016 - 3:30pm
D. Gamzina, Davis Millimeter-Wave Research Center, UC Davis
The UC Davis millimeter-wave research group has been leading the development of state-of-the-art technologies for demonstration of compact and high power sub-THz sources and amplifiers. Design and implementation of the W-band sheet beam klystron amplifier, the room temperature 94 GHz 2nd harmonic gyrotron, the 220 and 263 GHz travelling wave tube amplifiers, the 270 GHz power recirculating travelling wave tube amplifier, and the 346 GHz backward wave oscillator are reviewed. The enabling technologies that have been advanced to realize the presented sub-THz vacuum electron devices include: long lifetime high current density nano-composite scandate tungsten cathodes, nano-CNC milling technology, thermo-mechanical design and analysis, diffusion bonding and demountable vacuum assembly, and, more recently, copper additive manufacturing for vacuum electronics.
October 13, 2016 - 4:40pm