A 70W 81-86GHz E-band CW Travelling Wave Tube

BVERI has developed a 70W E-band travelling wave tube (TWT) to meet the demands of future high data rate wireless communication. The TWT is a periodic permanent magnet focused folded waveguide tube. It can produce over 75W continuous wave saturated output power over the range of 81-86GHz. With a single stage depressed collector, it can realize an efficiency over 16.7%. The test results of nonlinear phase shift and third order intermodulation of the tube are also presented in this paper.