Performance characteristics and applications of multi-band and millimeter low noise TWT amplifiers

The timely development of four multi-band low noise TWT amplifiers covering 0.5 to 40 GHz coinciding with the development of wide-band components such as double-band antennas, YIG filters and balanced mixers has provided increasing use of these amplifiers in ultra wide-band applications such as surveillance receivers. In addition, the extension of millimeter low noise TWT amplifiers with lower noise figure and higher power level has been achieved. These amplifiers, uniform field focused with integral solid state power supplies, represent state of the art performance.