Abstract :
Helix-type TWT´s producing several hundred watts of CW power are now available at frequencies up to Ku band. However, similar grid pulsed TWT´s have been limited, in the past, to 20 to 40 watts of average power, both by grid power dissipation and excessive beam interception on the helix. This paper describes a 1-kw X-band TWT that makes use of recently developed techniques to remove these limitations and allow operation up to 10% duty.
