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Accurate Test Fixture Characterization and De-embedding

This application note offers practical guidance on characterizing and de-embedding lead-in and lead-out structures for accurate measurements of non-connectorized devices using vector network analyzers. It also explains how to export S-Parameter files for use with other test equipment, ensuring precise results across various instruments.


May 13, 2025 by Rohde & Schwarz
Topics Covered
What Is Test Fixture Characterization and De-embedding
How It Works and How to Get Best Results
Consistency Checks

Application Note Overview 

For measurements of non-connectorized devices, test fixtures, probes or other structures are used to adapt from the coaxial interface of the test setup to the device under test (DUT). To ensure accurate measurements, it is essential to characterize the lead-ins and lead-outs, allowing their effects to be mathematically removed or de-embedded from results. The note offers practical guidance for characterizing and de-embedding these structures using R&S Vector Network Analyzers. Additionally, it explains how to export the characterized data as an S-Parameter file for use with other test equipment, such as oscilloscopes.

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