![]() ![]() The Smith chart contains almost all possible impedances, real or imaginary, within one circle. What matters is knowing the basics and how to use them, like always. ![]() You can find books and articles describing how a Smith chart is a graphical representation of the transmission line equations and the mathematical reasons for the circles and arcs, but these things don't really matter when you need to get the job done. That's it! Transmission coefficient, which equals unity plus reflection coefficient, may also be plotted (see below). What is a Smith chart? It's really just a plot of complex reflection overlaid with an impedance and/or admittance grid referenced to a 1-ohm characteristic impedance. ![]() Which way is up and where's that short circuit? Box 950, New Providence, NJ 07974, (908) 464-4214.Ī clickable index to our growing Smith chart page: Their snail mail address is:Īnalog Instruments Company, P.O. Be sure to check out our entry on Philip Smith in our Microwave Hall of Fame! Phil's wife still operates Analog Instruments, the company that sells the chart. The Smith chart was developed by Philip Smith at Bell Telephone's Radio Research Lab during the 1930s. If you want to download a Smith chart in pdf or gif format, we have several different ones in our download area! If anyone else wants to be a technical contributor on their favorite microwave subject, please contact us. We've got our own Smith chart tutorial here, thanks to a fan from Florida, Mike Weinstein, who really knows this subject, and is a fine writer too. ![]()
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