That is, given the load impedance zL, a transmission line section can relocate the impedance That a transmission line section will enable the load impedance to move in a circle about the center of Suppose we use a transmission line section to move the impedance. Let's look at example 2 from the previous page again. We'll show how to use transmission line sections and a series component to exactly match any load impedance. This method won't work unless the real part of the load impedance is 1 (that is, Re=1). How to use series inductors and capacitors to cancel out the reactance of a load. Insofar as it is possible, assume that care has been taken to reduce these factors to a minimum, and that, none-the-less, any such measurement will be accompanied by some percentage of error.The Smith Chart - Impedance Matching with Tx Lines, Series Inductors and Capacitors Smith Chart Tutorial - Impedance Matching with Tx Lines, Series L and C Previous: Series L and C I understand there are many factors that will affect the accuracy of such a measurement. In the case of an inductor which the manufacturer lists as 100 uH at 100 kHz, looking at the S11 plot, at the point where the frequency is 100 kHz, should the X, in R + jX be the same as the (nominal) inductance of the inductor? They will (or should) also tell you the frequency at which this value was obtained, since inductance of anything is not constant over a range of frequencies. At any particular point along the S11 Curve, the Smith chart will display R + jX of the component at a particular frequency.įor commercially produced inductors, manufacturers list a nominal inductance figure, e.g. Impedance is R + jX, where X represents the reactance (inductance/capacitance) of the component. capacitor, inductor, resistor) on a Smith Chart, you will get a curve that represents the impedance of that component as it changes with frequency. If you were to plot S11 of a basic electronic component (e.g. If that is the case, please feel free to say so. I realize that such an answer may not be available. (No, you can't use me for testing your newly designed electric chair.) What I need is a simple, direct answer, to a very narrow question. I am not just an electrical engineering noobie, I'm an electrical engineering dummy.

How inductance moves on a smith chart