How to extract Unilateral High Frequency memory (U-HF) model for limiter (LIM). The LIM model is the simplest nonlinear
amplifier model. Extracting this model requires little information about the component, i.e. 1-tone CW measurements,
performed on a nominal load impedance. It therefore takes into account only the dispersive effects present in the
amplifier band and ignores other memory effects such as those due to polarization or heating. Hence, it is suitable
for applications processing signals with quasi-constant envelope (frequency modulation), radar (frequency translation
or slow amplitude variation, low duty cycle). This model does not take into account load impedance changes.
