  We study the dynamics of a Josephson junction connected to a dc current
supply via a distributed parameter capacitor, which serves as a resonator. We
reveal multistability in the current-voltage characteristic of the system; this
multistability is related to resonances between the generated frequency and the
resonator. The resonant pattern requires detailed consideration, in particular,
because its basic features may resemble those of patterns reported in
experiments with arrays of Josephson junctions demonstrating coherent
stimulated emission. From the viewpoint of nonlinear dynamics, the resonances
between a Josephson junction and a resonator are of interest because of
specificity of the former; its oscillation frequency is directly governed by
control parameters of the system and can vary in a wide range. Our analytical
results are in good agreement with the results of numerical simulations.
