# 8.1: Introduction


This chapter introduces the Smith chart, most widely used graphical technique for describing and solving problems using $$S$$ parameters. The Smith chart is an annotated polar plot of $$S$$ parameters and is one of the most powerful tools in RF and microwave engineering and is used to present measured results, to conceptualize designs, and to intuitively solve problems involving distributed networks.

8.1: Introduction is shared under a CC BY-NC license and was authored, remixed, and/or curated by Michael Steer.