MONOLITHIC QUASI-OPTICAL FREQUENCY TRIPLER ARRAY WITH 5-W OUTPUT POWER AT 99-GHZ

Two new devices, the multi-quantum-barrier varactor (MQBV) and the Sch ottky-quantum-barrier varactor (SQBV), have been developed and applied in quasi-optical arrays for millimeter-wave harmonic generation. Mono lithic arrays utilizing these devices have been successfully fabricate d with nearly 100% yield. An output power of 5 W (1.25 W) at 99 GHz ha s been achieved with an SQBV (MQBV) tripler array, in excellent agreem ent with large-signal simulation predictions after correcting for diff raction losses in the matching system. These results represent the sta te of the art in solid-state millimeter-wave sources.