A Yagi aerial is a type of directional antenna used to receive or transmit signals in the radio frequency range. It is also known as a Yagi antenna or Yagi-Uda antenna, named after its developers Hidetsugu Yagi and Shintaro Uda. Other synonyms for Yagi aerial include beam antenna, log-periodic antenna, and directional antenna. While they all share the same basic structure and function, they differ in size, shape, and application. Yagi aerials are commonly used for television reception, amateur radio, and wireless networking, as they provide better signal strength, range, and directionality than other types of antennas.