Development of high-power broadband Ka-band cascaded-TWT

Progress on the demonstration of a high power broadband three-beam Ka-band cascaded traveling-wave tube (TWT) prototype is presented. The amplifier will be driven by an electron gun (0.6 A × 3, 20 kV) adapted from our 18-beam multiple-beam klystron gun design. Both serpentine and folded-waveguide versions of the cascaded-TWT have been evaluated. The expected peak RF output power is 4.5 kW with 100 W of drive power at a frequency of 30 GHz. The minimum output power is 3 kW over a 5 GHz frequency band (4 kW over > 2 GHz).

[1]  Baruch Levush,et al.  Linearity performance of multi-stage TWT amplifiers: Cascade vs. series , 2011, 2011 IEEE International Vacuum Electronics Conference (IVEC).

[2]  B. Levush,et al.  Eighteen-beam gun design for high power, high repetition rate, broadband multiple-beam klystrons , 2005, IEEE Transactions on Plasma Science.

[3]  B. Levush,et al.  High-power broadband cascaded-TWT development , 2012, IVEC 2012.

[4]  David K. Abe,et al.  1.4: Design of a high-gain wideband high-power 220-GHz multiple-beam serpentine TWT , 2010, 2010 IEEE International Vacuum Electronics Conference (IVEC).