Fresnel zone

Fresnel zones are imaginary layers of space between a transmitter and receiver that help us understand how radio waves travel. When a signal is sent, it doesn't follow a straight line perfectly; it spreads out and creates patterns of areas where waves reinforce or cancel each other. These areas are called Fresnel zones. The first zone is most important because if it’s blocked or disturbed, it can weaken the signal. To ensure good communication, it's ideal to keep these zones clear of obstacles, especially the first one, to minimize signal loss and interference.