127 - Yagi Antennas

Do you want to understand how a Yagi antenna works? In this episode, Phil explains the elements of a Yagi antenna, what they’re used for, and even how to build your own.   What You Need To Know Shintaro Udo and Hidetsugu Yagi created the antenna. A Yagi antenna is a directional antenna with at least two elements, usually three, mounted on a boom. The main element is the boom, where everything else is mounted. A Yagi usually includes a driven element, a reflector element, and a director element, all mounted on the same plane. The driven element is the main element, and it is what your feed line is connected to. Next, behind the driven element, you have the parasitic element called the reflector, and in front, you have the director element. The different elements are positioned to interfere with each other in a way that enhances the radiation and increases the directivity of the antenna. The longest element always sits behind the driven element, and that’s how you know which is the front and back. A Yagi can be used to pick up signals far away from you You can use a Yagi antenna to try to overcome simulcast issues. Yagi antennas are typically built for a very small range of frequencies. You can get a cross-pole Yagi antenna, which is very popular with amateur radio and using satellites. It is possible to build your own Yagi antenna with some basic materials. All session notes with links to the items we talked about an be found on our website at www.scannerschool.com/session127 You can help support Scanner School by visiting our support page at www.scannerschool.com/support Don't forget to join us for our weekly net on Zello. For info, visit https://www.scannerschool.com/zello