An antenna has a lot of electrons in a conductor. Any passing electrical field can bully these electrons around, because it’s a conductor. If you apply an elect

An antenna has a lot of electrons in a conductor. Any passing electrical field can bully these electrons around, because it’s a conductor. If you apply an electrical field you’ll start to push electrons up the wire, where they’ll start collecting, eventually reaching an equilibrium where they are repelling each other hard enough to fight back. Antennas use passing electromagnetic fields to allow electrons to be sloshed around like that. Then, the buildup of charge is measured and amplified to recreate the signal.