Re: Wireless Self-Resonance Experiments
Thinking of an inductor plus self-capacitance only gives the fundamental resonance, and even that only approximately. Treating the wire as a transmission line gives harmonics too - but evenly spaced (as harmonics always are by definition). Adding the cross-coupling between turns then turns the harmonics into overtones, but by now things are getting too complicated for simple models so full wave simulation is needed.
It may be that for some geometries a simple model can give insight. I am thinking of things like a large coil with very few turns (so little interaction between adjacent turns) or a very long solenoid with many turns (so some uniformity - the basic element becomes a turn instead of a segment of wire, and strong interaction between nearby turns).
|