1 KW Ka-band folded waveguide Traveling-Wave Tube

A 1000 W Ka-band Traveling-Wave Tube (TWT) was fabricated with Folded Waveguide as its slow wave structure. Based on the previous experiment, the phase velocity taper technology was applied in this TWT. Also the sever structure and output structure of the TWT were improved. The test result shows it can produces over 1000 W of saturation output power in 2 GHz bandwidth and the electron efficient is about 10%. The level of output power and bandwidth are the same level as coupled cavity TWT, but the manufacture way of the folded waveguide TWT is much easier. This proves that the folded waveguide will be a good slow wave structure and the folded waveguide TWT will be a promising type of high power millimeter wave source.