Abstract
Summary form only given, as follows. Gyrotron traveling wave tube (gyro-TWT) amplifiers are under investigation for radar applications due to their high power and broad bandwidth capabilities in the millimeter wavelength range. The design and experimental study of a 35 GHz gyro-TWT amplifier operating in the circular TEO/sub 01/ mode at the fundamental cyclotron harmonic are presented. The interaction circuit in this experiment consisted of a new type of ceramic loading that provided controlled loading of both the TEO/sub 01/ operating mode and the backward wave oscillations to ensure stable operation. The gyro-TWT circuit consisted of a lossy, linear amplification section that employed ceramic rings spaced to provide the required absorption. The final, nonlinear stage of amplification occurred in a short conducting wall section at the end of the interaction circuit.
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