A bit of a disappointing article The TL;DR is actually: the loop antenna captures the magnetic part of the signal. Not the electrical part. That's how you get

A bit of a disappointing article The TL;DR is actually: the loop antenna captures the magnetic part of the signal. Not the electrical part. That's how you get it (Also, that store where your antenna "has" to be a multiple of the wavelength is not really true. It is better if it is, but it is ok if it isn't)