Have you ever wondered this? I’ve built dozens of dipoles, a couple of loops and at least one Moxon antenna for ham radio work, but when I started out I had a hard time visualizing this whole impedance thing.
I stumbled across this video on YouTube the other day that provides one of the clearest explanations of the importance of impedance matching when working with RF.
The video is originally from Tektronix. It’s pretty old and the quality isn’t 100% but the presentation is excellent. Give it a view if you are interested in this topic.