  Dynamics is studied of an electron in a quasi-one-dimensional ballistic ring
under circularly polarized electromagnetic field propagating along the normal
to the ring plane. The average emission intensity from the ring is calculated.
The value and direction of the electron average angular velocity in the ring
depend on the incident wave parameters. It is found that the ring average
dipole moment can remain constant under certain conditions. Possibility is
shown of higher harmonics enhancement in the ring radiation spectrum.
