Using a vector network analyser (VNA) with two internal RF sources at its full power, the ICEBreaker Fast Source and Load Pull (FSLP) option enables the characterisation of active components under various input
and output mismatch conditions. Within the power capabilities of the VNA, one does not need to invest in a dedicated and costly source and load pull setup, based on either passive or active
tuning techniques. As such, the FSLP option is a low-cost source and load pull solution. When required, the power capabilities can be further extended using external amplifiers and some
accessories such as isolators and possibly external couplers.
Running directly on selected VNAs, the FSLP option allows capturing the fundamental behaviour of active components or circuits quickly, in terms of incident and scattered
voltage wave at both ports, under any input and output load conditions. First, the behaviour of the component is saved for a selection of bias points, fundamental frequencies, input powers and
output load impedances. Next, different derived quantities, such as power gain, delivered input and output powers or power added efficiency (PAE), can be visualized versus input and output
mismatch conditions. This empowers RF engineers to easily obtain the optimal source and load matching network parameters to interface two different stages, using a minimal number of iterations.
Moreover, the FSLP option performs the necessary measurements to derive a fundamental S-functions model. Coupled in commercially available simulators, such a model will
allow to predict the behaviour of active components or circuits at fundamental frequency under varying source and load conditions or in interaction with other components, assuming the effect of
harmonics can be neglected.
