The Vavilov-Cherenkov radiation appearing in a circular regular ideal waveg
uide with a chiral medium is considered. The features of the emission spect
rum excited by a charge moving along the waveguide axis are investigated. E
xpressions for the energy loss of a moving charge are obtained. (C) 1999 Am
erican Institute of Physics. [S1063-7842(99)01203-9].