Three-Port Modeling for Large Signal Devices

The paper has presented the basic concepts of a design oriented 3-port model for large-signal and power applications, restricted to allow only the effect of a single nonlinearity to dominate the problem for modeling. This restriction is not severe and methods are currently being developed to obtain load-pull data directly from the nonlinear results of only two loads. The applicable nature is easily evaluated by observing the reflection and transmission data as the drive level is varied. If the results (calibration not necessary) follow a circle, the 3-port model may be used for design. Such a process offers a simple technique to quickly obtain useful design data for a new or unknown device, substantially decreasing initial circuit design time.