The Yagi-Uda antenna, commonly known as a Yagi antenna, is a directional antenna used primarily for radio frequency communication. It consists of multiple elements: a driven element, a reflector, and one or more directors. This design allows the antenna to focus signals in a specific direction, enhancing its gain and improving reception. Yagi antennas are widely used in various applications, including television reception, amateur radio, and wireless communication systems. Their ability to provide high gain and directivity makes them effective for long-distance communication, especially in environments with obstacles that can interfere with signals.