Another application of using Python to demonstrate RF concepts comes in the form of a calculator to plot L-C series reactance. This plot shows two useful concepts: resonance and the effect of parasitic capacitance or inductance. For a capacitor, the magnitude of the series reactance decreases with increasing frequency, while the opposite is true for an inductor. For a capacitor with parasitic inductance, there will come a point where the two reactances are equal in magnitude and cancel each other out. This point is the resonant frequency of the combined circuit. As the frequency is increased approaching resonance, the reactance of the capacitor decreases much more rapidly than it would without the presence of the inductance. The end effect is as if we were working with a larger capacitor than what we actually have for those frequencies near resonance. Beyond resonance, the effect of the inductance dominates the response of the combined circuit and the capacitor actually behaves like an inductor!
So the struggle continues...