Antennas are a crucial component of any wireless communication system, including WiFi networks. They are responsible for transmitting and receiving electromagnetic waves, which carry information between devices. In this article, we will explain how antennas work, specifically in the context of WiFi networks.
Firstly, let’s understand what coaxial cable is. Coaxial cables have a shield on the outside, an insulator, and a center conductor that runs power to the antenna. This is important because if two wires are placed side-by-side, the current flows cancel each other out. However, if the wires are separated and the current flows in the same direction across a plane, electromagnetic energy is generated, which allows us to generate RF energy that can be radiated outwards. This is how an antenna works: it transmits electromagnetic energy into space.
A simple dipole antenna is when two wires are split in different directions. Current flows in the same direction across a plane, generating an energy field that radiates outwards. Most antennas, including those used in WiFi networks, act similarly to dipole antennas.
But how does an antenna receive energy? It captures energy radiated by other antennas and transfers it down to the feed point. This energy can then be amplified or used directly in a system.
In summary, antennas are essential for wireless communication and are responsible for transmitting and receiving electromagnetic waves. Understanding how they work is crucial for optimizing WiFi networks.