Abstract : At constant beam energy and propagation angle, the coherent radiation from a charged particle beam is a function of frequency only. The intensity of the radiation oscillates with a frequency dependent on length of the path of the beam and is modulated by the form factor corresponding to the shape of an individual charge bunch. Calculations are presented for line charge distributions which have rectangular, triangular, and trapezodial axial variation. A point charge distribution is also considered for comparison. Keywords: Radiation from electron beam; Cherenkov radiation.