Abstract
All kinds of electromagnetic wave generation and amplification in any frequency band are based on a phenomenon of instability. Assume that there exist some undisturbed, or basic state of a physical system. Consider the evolution in time of small deviations from this state. The system can be identified as stable, if these deviations do not increase with time, and in such a case the system cannot function as an oscillator or amplifier. In the opposite case, when the small deviations increase with time, the system is unstable, and it can be used as an oscillator or amplifier. In the further analysis we mainly follow [11,12].
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© 2004 Springer-Verlag Berlin Heidelberg
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Vagner, I.D., Lembrikov, B.I., Wyder, P. (2004). Current Instabilities. In: Electrodynamics of Magnetoactive Media. Springer Series in Solid-State Sciences, vol 135. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-06941-7_6
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DOI: https://doi.org/10.1007/978-3-662-06941-7_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-07825-5
Online ISBN: 978-3-662-06941-7
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