Give the basic function of the antenna.

Hint: We know that Antennas are much more than simple devices connected to every radio. They're the transducers that convert the voltage from a transmitter into a radio signal. And they pick radio signals out of the air and convert them into a voltage for recovery in a receiver. Antennas can be classified in various ways. The dipole, monopole, array and large loop antenna types below typically function as resonant antennas; waves of current and voltage bounce back and forth between the ends, creating standing waves along the elements. Aperture antennas can be resonant or not.

Complete step by step answer
Functions of an Antenna were as follows;
=> An antenna is a device that acts as a transformer to provide a good match between the feeding line as a local source of power and free space.
=> If the antenna is not matched to free space, power will be reflected back toward the transmitter, resulting in a loss in radiated power.
That's more or less what an antenna (sometimes called an aerial) does; it's the metal rod or dish that catches radio waves and turns them into electrical signals feeding into something like a radio or television or a telephone system. Antennas like this are sometimes called receivers.
An antenna is a transducer. (Actually, a transducer is a device that transforms one type of energy to another, e.g., mechanical to heat or kinetic to electrical, etc. Some may say that an antenna is not a transducer, since it converts electrical energy again to electrical energy.

Note: We know that a transducer is an electronic device that converts energy from one form to another. Common examples include microphones, loudspeakers, thermometers, position and pressure sensors, and antenna. Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc.). The process of converting one form of energy to another is known as transduction.