De-embedding S-Parameter [pic] In this lecture, we will introduce the various types of planar transmission lines and test fixtures that are typically used when measuring surface mount devices. We will next discuss the mathematical relationship between the S and T parameters. Next, we will show how the measured T parameters and a fixture model can be used to de-embed the test fixture from the measurements. We will then show an example of modeling a test fixture using a combination of measurement and computer optimization. Finally, we will provide a measurement example using the de-embedding process described in this presentation [pic] Traditionally, both RF and microwave components were designed in packages with coaxial connections. Complex systems could be easily manufactured by bolting together a s……