Mostly used to help visualize cumulative wind direction or wave direction data but also used anytime you need to show a histogram related to direction. It plots the frequency or percentage of occurrences data shows up at a particular angle or direction. The Rose Chart - Rose Plot is a combination of a polar chart and a histogram. Its designed to plot real and imaginary components of circuit and cable characteristics. The Smith Chart Control is used primarily by Electrical Engineers. The Graph and Scientific Graph also support this feature. As the user moves the mouse over the graph/data-points, the corresponding graph coordinates are displayed in the top-left corner of the control. This features shows the graph coordinates/data-point value for the location of the mouse cursor. Within the demo, see example 202.Īlso supported is cursor tracking. The most important application of Smith chart is Impedance matching. Smith charts make calculations of impedance and admittance of any transmission line simple and easy. One at 3 o'clock, the other at 6 o'clock. A Smith Chart is the polar plot of complex reflection coefficient. Like the Graph and Scientific Graph, the Polar Chart and Smith Chart supports graph annotations.Īlso, like the Graph and Scientific Graph, multiple axes are included. In the next section, we will learn to use impedance/admittance (Z/Y) Smith Chart, where both impedance and admittance circles are shown. We can use this Smith Chart to read off the values for the impedance, and reflection coefficient.
The equivalent admittance of a plotted impedance value lies diametrically. Smith Chart in Figure fig:SCDerscadmimp has impedance circles, and impedance coordinates on it. There is no horizontal scrolling, however, the Polar Chart, Smith Chart, and Rose Chart components support zooming with a high level of detail in grid line restructuring to best fit the shape and amount of zoom. Smith Chart it is a graphic tool for solving transmission lines problems.
The following figure shows the Smith Chart interface with a chart that is overlaid by a constant 1.5:1 SWR circle. AAplot can either plot the measure value as impedance components (resistance and reactance) or as admittance components (conductance and susceptance).
See example 200 within demo to learn how to create a simple polar chart. A Smith Chart maps the entire right half of a complex plane into a finite circle. Admittance is the reciprocal of impedance, so it is found from: (26-9). Each data-point is assigned its own independent x and y value. A circle is con- structed from this radius and is called the VSWR circle. That changes all of the constant-resistance circles, touching at the right-hand side of the resistance axis (where R and G 0), into constant-conductance circles that. The Polar Chart Control is similar to the Scientific Graph in that the developer uses data-sets containing both y and x axis components. To create an admittance version from a regular impedance Smith Chart, first flip the chart horizontally about a vertical line drawn through the center of the chart. Since it is just a matter of rotation, there is no need to have separate Smith charts for impedance and admittance. Chapter 1: Polar Chart / Smith Chart / Admittance Chart / Rose Chart Control The admittance Smith chart therefore is obtained by rotating the impedance Smith chart by and replacing by and by.