Stub design using smith chart

This course is useful for undergraduate students interested in microwave and RF engineering  and design of matching networks used for RF CIRCUITS. Basic impedance matching circuits are stub and they can be best designed by Smithchart. In this course, you'll find an overview of stub tuning examples using the Smith chart to match RF transmission lines to various loads. Having the ability to design these matching circuits using a Smith chart can be handy if you ever find yourself working in the RF field because it is often intuitive and faster than calculating the analytical equations. The Smith chart was an invention of the electrical engineer Phillip Hagar Smith. In another article, we discuss how a shunt stub can be used to provide impedance matching. Additionally, impedance matching can also be achieved through a series stub, as we’ll discuss shortly. However, single stub matching cannot be used if the load impedance has some variations. In these cases, a better option is to use a double stub matching network, which is the focus of this article. In RF engineering, it is critical to match the line to its load. Impedance matching can be accomplished using a variety of different methods and components, each suited to specific applications. This, of course, leads to the inevitable and age-old dilemma where the engineer will have to balance the best possible solution with the cheapest possible implementation.