Research on dielectric-loaded rectangular Cerenkov maser

A 3-D model of the dielectric-loaded rectangular Cerenkov maser for the beam-wave interaction is proposed. The hybrid-mode dispersion equation is derived with the Borgnis potential functions by using the field-matching method. Moreover, its approximate solution is obtained under the assumption of dilute beam. Through numerical calculations, the effect of the dielectric layer thickness, bean thickness and the beam-dielectric layer gap on the resonant growth rate is investigated.