Abstract
This paper discusses the design and development of compact high-efficiency pulsed X-Band helix Travelling Wave Tube (TWT) delivering a minimum of 250W of peak output power over a bandwidth of 800 MHz with RF efficiency of 20% and minimum gain of 27 dB. Initial Electron-wave analysis was carried out using 1D-codes and was optimized using 3D PIC Solver in CST Studio. This TWT employs positive velocity taper near the output coupler in order to enhance RF interaction efficiency and reduce the second harmonic content at the output power from the device. The length of the SWS is around 95 mm with overall packaged TWT length of around 220 mm. Single stage depressed collector is used in the TWT and overall efficiency of 35% is achieved. Two prototype TWTs were developed and tested for performance.
Published Version
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