A monopole antenna is a type of radio antenna that consists of a single vertical element, typically mounted over a ground plane. It operates by radiating electromagnetic waves, making it effective for various communication applications, including cellular networks and broadcasting. The ground plane acts as a reflector, enhancing the antenna's performance and efficiency. Monopole antennas are known for their simplicity and compact design, often used in portable devices and vehicles. They are usually tuned to specific frequencies, allowing them to transmit and receive signals effectively. Common examples include car antennas and walkie-talkies, which benefit from their lightweight and easy installation.