Millimetre-wave generator that uses a spiralling electron beam
- 1 January 1973
- journal article
- Published by Institution of Engineering and Technology (IET) in Proceedings of the Institution of Electrical Engineers
- Vol. 120 (2) , 197-205
- https://doi.org/10.1049/piee.1973.0042
Abstract
A millimetre-wave generator that uses a helical electron beam spiralling around the axis of a nearly square wave-guide is described. The frequency of gyration round the axis is made equal to one-half of the signal frequency, thus halving the longitudinal magnetic field by comparison with those of cyclotron devices. Power outputs in excess of 2W at Q band wavelengths have been achieved with low-current, high-voltage beams, but the most important feature of the device is that the same electro-optical system can be used at considerably shorter wavelengths, for example λ = 2 mm. A brief historical introduction describes the development of this tube in relation to the better known cyclotron tubes.Keywords
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