RF: . What is the importance of The Smith Chart in RF System.

ASSIGNMENT 2
Why use smith charts.
Use of the Smith Chart utility has grown steadily over the years and it is still widely used today, not only as a problem solving aid, but as a graphical demonstrator of how many RF parameters behave at one or more frequencies, an alternative to using tabular information. The Smith Chart can be used to represent many parameters including impedances, admittances, reflection coefficients; a Smith chart is the RF engineer's best friend! It's easy to master, and it adds an air of "analog coolness" to presentations, which will impress your friends, if not your dates! A master in the art of Smith-charting can look at a thoroughly messed up VSWR of a component or network, and synthesize two or three simple networks that will impedance-match the circuit in his head
ROLE OF SMITH CHART IN RF.
1. Wider bandwidths it is usually necessary to apply Smith Chart techniques at more than one frequency across the operating frequency band.
2. Since impedances and admittances change with frequency, the problems is solved using the Smith Chart can only manually using one frequency at a time, the result being represented by a point?
3Normalised scaling allows the Smith Chart to be used for problems involving any characteristic impedance or system impedance, although by far the most commonly used is 50 ohms.
4Use of the Smith Chart and the interpretation of the results obtained using it requires a good understanding of AC circuit theory and transmission line theory, both of which are pre-requisites for RF engineers
5. With relatively simple graphical construction it is straightforward to convert between normalized impedance (or normalized admittance) and the corresponding complex voltage reflection coefficient.
6. On line calculations ensure monitoring of proper operation and display the information to the user in an efficient way.

7. In addition, an advanced load impedance monitoring diagnostic has been implemented, being displayed as a Smith Chart, for example one which is based on the system used at the SRS in Daresbury, England.

8. Smith chart has made it possible to compare the following parameter of universal interest:
- Pure resistance line.
- Resistance circle set.
- Two wavelengths .
- Reflection coefficient angle.
- Reflection coefficient magnitude.
- dB of loss .
example

circuit.