A Schottky diode is a type of semiconductor device that allows current to flow in one direction while blocking it in the opposite direction. It is made from a metal-semiconductor junction, typically using materials like silicon or gallium arsenide. This design results in a low forward voltage drop and fast switching speeds, making it ideal for applications in power supplies and radio frequency systems. One of the key advantages of a Schottky diode is its ability to handle high frequencies, which is beneficial in circuits that require rapid switching. Additionally, its low reverse recovery time minimizes energy loss, enhancing overall efficiency. These characteristics make it a popular choice in modern electronic devices.