Propagation describes how those radio waves travel through the environment once they leave the antenna. Waves don't always travel in a straight line; they interact with the world in several ways: Antennas & Propagation short course - University of Surrey
It catches passing EM waves and converts them back into electrical signals for a receiver to process. antennas and propagation
It takes an oscillating electrical current from a transmitter and turns it into an electromagnetic (EM) wave that radiates outward. Propagation describes how those radio waves travel through