MOS varactor modeling for mm-Wave applications

A RF MOS varactor model has been verified in mm-wave range in this paper. Since this non linear model consisted of the SPICE compatible lumped elements with physical meanings has a single topology and simple equations, it can be easily implemented in commercial circuit simulators. Based on the S-parameter measurement, the efficient and accurate parameter extraction methodology from analysis for Z-parameters on this equivalent circuit was developed and successfully validated up to 110 GHz.