Design of a W-band gyrotwystron amplifier

Summary form only given, as follows. There is currently a need for high-power, broad-band W-band amplifiers for millimeter wave radar systems. In response to this need, a 94 GHz gyrotwystron amplifier has been designed. The gyrotwystron amplifier consists of an input cavity and three buncher cavities followed by a travelling wave output section, all operating in the TE/sub 01/ mode. Non-linear simulations show that the amplifier is capable of producing 50 kW peak output power at 20% duty factor with an efficiency of about 14%. The predicted full width half maximum bandwidth is in excess of 1600 MHz and the -1 dB bandwidth is close to 1000 MHz. The gyrotwystron amplifier is currently in fabrication and tests are expected to begin by the summer of 2001. Details of the design and experimental results, if available, are presented.