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.
This tutorial presents a feature that enables automatic configuration of schematics in System Architect for testing HPA and LNA models. The user will be able to run pre-configured simulations to test the model with 2-tone signals, a 5G signal and possibly load-pull simulations. This feature is available for all HPA models and LNA-B-HF model.
To extract a limiter model, see Extract limiter model.
