On Fri, Jul 30, 2010 at 5:52 PM, Olin Lathrop w= rote: > The easiest way to measure resonance is probably to feed it with a > relatively high impedence source and then find the frequency that results= in > the highest amplitude. =A0Unless you've got a very high Q antenna though,= the > resonance peak and the pure resistive point are going to be close enough > that either is fine for tweaking things. I still don't understand, though. Aren't we talking about a dipole antenna? If so, it should look roughly like a series RLC circuit, in which case resonance is not the highest impedance point. When you say "amplitude" do you mean voltage across the antenna feedpoint terminals? Sean > > > ******************************************************************** > Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products > (978) 742-9014. =A0Gold level PIC consultants since 2000. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .