Broadband non-linear FET behavioral model defined in the admittance domain

In this paper a broadband non-linear behavioral model, defined in the admittance, Y-parameter, domain rather than the travelling waves, X-parameter, domain, applicable for FETs is presented. This work builds on previous work by incorporating a quadratic dependence of the Large Signal (LS) intrinsic Y-parameters real parts with frequency to extend its bandwidth. Such a model is able to predict large-signal transistor behavior, including the second harmonic, up to close to the device f_T. The model has been extracted and validated on WIN GaN HEMT devices.