-A millimeter-or submillimeter-wave combiner using a quasi-optical openresonatorto effectivelycombinethe poweroutput of several solid-state oscillatorsto a single-frequency is deseribed. The combiner makesuseof a symmetrical concave spherical resonator with dielectric wedgelaunchers asenergycouplers. To demonstrate feasibilityof this concept, experiments werecarriedoutby usingtwoInP Gunnoscillatorsat 60 GHz, anda combiningefficiencyof 54 percenthasbeenachieved,
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