  In superconductors with three or more bands, time-reversal symmetry (TRS) may
be broken in the presence of repulsive interband couplings, resulting in a pair
of degenerate states characterized by opposite chiralities. We consider a
Josephson junction between a three-band superconductor with broken TRS and a
single-band superconductor. Phenomena such as asymmetric critical currents,
subharmonic Shapiro steps and symmetric Fraunhhofer patterns are revealed
theoretically. Existing experimental results are discussed in terms of the
present work.
