UNIFIED SMALL-SIGNAL-NOISE MODEL FOR ACTIVE MICROWAVE DEVICES

A new method for modelling, concurrently, the small-signal and the noi se performance of active microwave devices is proposed. Here the deter mination of the element values in a device equivalent circuit is no lo nger dependent only on the scattering parameters, but also on the devi ce noise parameters. In other words. the device noise performance is t reated as an intrinsic set of characteristics of a device like the S-p arameters themselves and influences the determination of element value s in the device equivalent circuit. On using the concurrent modelling procedure suggested in this paper. it has been found that, not only ca n the small-signal performance be simulated accurately, but also the p rediction of noise performance is in much better agreement with measur ements than those of recent published models [1, 2].