How do FM Antennas Work?
Before we go into design considerations of FM radio antenna, let us understand the basics of how does an antenna work. As I said before, an antenna is a type of transducer which can create electric currents in response to reception of electromagnetic waves (receptor function) and create an electromagnetic output in response to conducting electric current. More specifically, any antenna is an arrangement of metal conductors. When an alternating current is passed through such an antenna, the electric field associated with it, changes. This changing electric field creates a magnetic field, and the changing magnetic field creates an electric field back again. This is how an electromagnetic wave is created and transmitted by an antenna. This is called the transmission of a signal. During reception of an incoming electromagnetic wave, exact reverse of the phenomenon above occurs. The incoming electromagnetic wave creates an alternating electric current inside the antenna in response. This is
