What is the antenna system?

Antennas are much more than simple devices related to every radio. They’re the transducers that transform the voltage from a transmitter into a radio signal. And they pick radio signals out of the air and change them into a voltage for recovery in a receiver. Typically taken for granted and left for the last minute in a design, antennas are nevertheless critical for establishing and maintaining a reliable radio connection. They may look complex and enigmatic to most engineers, particularly EEs working with wireless applications for the first time not to mention that they come in an apparently infinite variety of sizes and shapes.