High-Power Traveling-Wave Tubes for Radar Systems

Data obtained on high-power traveling-wave tubes at S and C band indicate performance suitable for the final amplifier in a wide bandwidth phase coherent radar transmitter. Static phase measurements demonstrate the capability of parallel operation of tubes and the feasibility of use in pulse compression systems. Gain and power output data show that for the most efficient operation a programmed drive is needed. Data taken at constant drive power displays a compressed gain variation and a somewhat lower output. An extrapolation of present data indicates the feasibility of obtaining 25- to 30-per cent bandwidth in high-power traveling-wave tubes with other improved characteristics.