Big, small, and otherwise, you can still find a lot of antennas in today’s digital-focused world. They act as receivers that turn sound waves into electricity and then send that to the wider world. Televisions, radio stations, GPS systems, and other devices that rely on signals to be carried from one place to another all use antennas.
Energy can flow and change from form to form, so if you are listening to a radio then the sound of the DJ’s voice and the music is turned from sound energy to electrical energy. The electricity goes up an antenna and is turned into radio waves. Radio waves then travel out towards the antenna of your radio, go down the antenna and are turned into electrical energy, and then are turned into sound energy.
So, the process goes: Sound, electrical, radio waves, then from radio, electrical, and back to sound. Antennas are the components that allow for the changes in waves to happen, and they allow the sound waves to go all around the world no matter what. Components that help in this process, such as broadband power dividers, are continually making advances to ensure the process is easier and faster.
Antennas and transmitters can either be as big as satellite dishes or as small as a metal rod that sticks out of the handheld radio in the garage, but they all do the same process to get energy from one place to the other.
The relationship between Antennas and transmitters is a shared one. Both are instrumental in turning the radio wave signals into sound and light energy that your TV’s and radios can both use to produce picture and sound. The signals can move in several different ways, either going through the ground, bouncing off of the sky, or just moving in a straight line towards the transceiver.