Patch antenna

A patch antenna is a type of antenna that consists of a flat, thin piece of metal (called a patch) mounted on or above a dielectric surface. It typically looks like a small rectangle or circle and is used to send and receive radio signals. The design allows it to be low-profile, lightweight, and easy to produce, making it ideal for devices like smartphones, GPS units, and satellite communications. Its simple structure enables efficient signal transmission with minimal space, while its shape and size often determine the frequency it operates on.