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Amplification of frequency-swept signals in a W-band gyrotron travelling wave amplifier

Zhang, Liang and Donaldson, Craig R. and Cain, Peter and Cross, Adrian W. and He, Wenlong (2018) Amplification of frequency-swept signals in a W-band gyrotron travelling wave amplifier. IEEE Electron Device Letters. pp. 1-4. ISSN 0741-3106 (In Press)

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Abstract

The frequency agility of a W-band gyrotron travelling wave amplifier (gyro-TWA) was demonstrated by the amplification of a frequency-swept input signal (chirp signal). The gyro-TWA was developed to provide high output power and wide bandwidth by using a helically corrugated interaction region. In the experiment a ~0.5 W signal of linearly swept frequency bandwidth of 1 GHz was amplified and a gain of over 30 dB was measured when driven by a 40 keV, 1.5 A, axis-encircling electron beam.