Lecture 3: The Smith Chart

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The Smith chart is a very useful graphical tool in microwave engineering because it allows you to visualize the impedance and the corresponding reflection coefficient at different points in the circuit or as one “moves” around on a transmission line. In the following two videos I explain the fundamental characteristics of a Smith Chart.

In this video I keep covering the mechanics of using the Smith Chart and I also work through concrete examples to illustrate the various concepts. The examples cover how to plot impedance points and reflection coefficient vectors on the Smith Chart, and how to translate one to the other. I also illustrate how the Smith Chart can be used to insert transmission line elements and reactances in series with the load impedance to find the resulting input impedance.