First bandwidth measurements of a novel gyrotron amplifier are presented. The coupling between the second harmonic cyclotron mode of a gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad bandwidth by using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a a maximum output power of 1.1 MW, saturated gain of 37 dB, linear gain of 37 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth), and an efficiency of 29%, in good agreement with theory.
- electron cyclotron maser
- tube amplifier
- twt amplifier
- microwave amplifier
- microwave devices
- microwave generation
- gyro-travelling wave amplifier
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Applications of microwave and mm-wave sources and amplifiers for the defence, security and health sectors
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