Frequency mixing in a relativistic electron beam

A theoretical analysis and an experimental study of millimeter wave generation by a fast wave interaction between a bunched electron beam and a transverse wave are reported in this paper. The technique appears to be practical for the generation of wavelengths as short as 1 to 2 mm. The experimental apparatus reported here converts power at a frequency of 9.17 Gc to power at a frequency of 39.71 Gc with an output power of 2 to 3 mw.