Injection locking of an electronic maser in the hard excitation mode

Abstract

The phenomenon of hard excitation is natural for many electronic oscillators. In particular, in a gyrotron, a maximal efficiency is often attained in the hard excitation regime. In this paper, we study the injection-locking phenomena using two models of an electronic maser in the hard excitation mode. First, bifurcation analysis is performed for the quasilinear model described by ordinary differential equations for the slow amplitude and phase. Two main scenarios of transition to the injection-locked mode are described, which are generalizations of the well-known phase-locking and suppression mechanisms. The results obtained for the quasilinear model are confirmed by numerical simulations of a gyrotron with fixed Gaussian structure of the RF field.

Synchronization of delay-coupled gyrotron oscillators

“…In (1), 1,2 A are slow amplitudes, ' is normalized frequency mismatch, i c c c ) ) ) is the complex gain factor, I s is the normalized beam current parameter, U is the coupling strength,…”

“…Providing coherence of radiation of large number of high-power microwave sources is a challenging task. Among the possible solutions there are either injection locking by external master oscillator with stabilized frequency [2,3], or mutual synchronization of two or more oscillators [4].…”