The proposed research is aimed at identifying and correcting the shortcomings of existing microwave models when applied to practical millimeter-wave devices for use in MMICs. Pacific Monolithics' highly-developed small-signal and large-signal microwave measurement and modeling capability will be used as a starting point. Pseudomorphic Modfets, the most practical millimeter-wave devices for MMIC use during the next five to ten years, will be characterized by dc measurements, s-parameter measurements at frequencies up to 40 ghz, and transient response measurements. Standard small-signal and large-signal microwave models will be derived. The weaknesses of the models in the millimeter-wave range will be determined. Enhancements to the models will be provided to overcome the most significant weaknesses, such as those due to distributed effects, unusual transconductance nonlinearity, backgating and lag effects. The model enhancements will be applied in the simulation of a 35-ghz receiver chip, and remaining shortcomings will be determined. The ultimate goal is to generate a millimeter-wave modeling and simulation capability, using commercially available software and hardware, that will be as effective as Pacific Monolithics' present microwave modeling and simulation capability. Anticipated benefits/potential commercial applications - Pacific Monolithics will benefit from using improved mm-wave models in the redesign of a 35-ghz receiver chip and in the development of subsequent commercial and military mm-wave products. The government will gain the means for obtaining mm-wave MMICs
