Investigation on ultra wide band plan alignment multiple beam W band travelling wave tube with two stage staggered double vane structure
An ultra wide band W Band travelling wave tube using staggered double vane slow wave structure (SDV SWS) combined with plan alignment three pencil beams is investigated in this paper. Instead of only using the fundamental mode, the first two modes of SDV SWS are designed to match with the same electron beam to promote the bandwidth. Particle in cell (PIC) simulations with our new type of two stages SDV TWT predict that when the beam voltage is of 22kV and beam current of 3x0.15A respectively, the travelling wave tube can produce over 2.12 kW of peak power within the total length of 70 mm, also with a corresponding gain of 42.5 dB and an electronic efficiency of 21.4% at 94 GHz. And the 3 dB bandwidth can be achieved about 28 GHz, which is almost the twice high than the one mode SDV TWT with same parameters before.
2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW THz)