matlab-deembed-rf-cascade

To de-embed fixture effects from measured S-parameters, you use the MATLAB RF Toolbox deembedsparams function to remove known fixture networks from a measured chain and recover the true DUT response. This requires accurate fixture S-parameter files and consistent reference impedances.

The best way to cascade RF S-parameter networks is using the MATLAB cascadesparams function, which computes the end-to-end S-parameters for two or more RF blocks connected in series. You must align the frequency vectors using rfinterp1 before cascading to ensure accurate results.

Cascaded S-parameters show incorrect frequency data when the frequency vectors of individual RF blocks are misaligned. You must align frequency grids across all networks using rfinterp1 and ensure consistent reference impedance before calling cascadesparams or deembedsparams.

Yes, you need the MATLAB RF Toolbox to remove test fixtures from DUT measurements, as it provides the required cascadesparams, deembedsparams, and rfinterp1 functions. These functions handle the frequency grid alignment and port ordering necessary for accurate fixture removal.

Yes, you can use deembedsparams to extract a DUT from a fixture1-DUT-fixture2 measurement chain by simulating the measurement setup and removing both fixture networks. This fixture removal workflow recovers the corrected DUT S-parameters by ensuring proper port ordering and impedance alignment.