Design and Experiment of An E-band Folded Waveguide Traveling Wave Tube

An E-band folded waveguide traveling wave tube (FWGTWT) was designed, fabricated and tested. Experimental result shows that the prototype tube covers the bandwidth of 83-86GHz with the output power of above 30W, meanwhile, the peak power is 35W in 85.5GHz. The maximum electron efficiency is up to 3.3%. The tube is tested when the electron gun voltage is 17kV and the beam current is 62mA.