Engineering library
RF and circuit simulation guides
Practical guides to S-parameters, Smith chart impedance matching, SPICE AC analysis, Bode plots, and the measurements used to tune RF and analog circuits.
Engineering guide
S11 and S21 explained for RF filter simulation
Learn what S11 and S21 mean, how return loss and insertion loss relate to them, and how to read RF filter plots without confusing reflection, transmission, and gain.
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Smith chart impedance matching, step by step
Learn how to normalize impedance, read reflection coefficient, add series and shunt elements, and verify a Smith chart matching network across frequency.
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SPICE AC analysis and Bode plots for circuit design
Set up a SPICE AC sweep, choose the small-signal source, plot gain and phase, place Bode markers, and avoid confusing AC analysis with transient simulation.
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