Single-Mode Cavity Maser at 2200 Mc (Correspondence)

Cavity masers which have been reported in the literature have utilized a dual-mode cavity resonant at the pump and signal fre-quencies, but Strandberg, et al., has reported an X-band cavity maser which can be operated with the cavity resonant only at the signal frequency. Siegmann has also reported a multiplicity of resonances in his cavity maser for the pump signal which might possibly be caused by some sort of dielectric loading effect.