A PPM-focused, medium noise, high gain-watt CW traveling-wave tube amplifier for 25 to 40 GHz frequency band

A helix-type traveling-wave tube amplifier has been developed which is capable of providing more than 0.5 watt CW saturated power with approximately 20 db noise figure in the frequency range 25 to 40 GHz. The mm-wave tube combines low noise methods of beam formation with high power techniques to helix support to achieve up to 1 watt of output power over a narrow band; the accompanying noise figure is 20 to 25 db. Under broadband conditions, the saturated power output is typically 300 to 600 mW across the 25 to 40 GHz band with saturation gain varying from 50 to 60 db.