Yagi–Uda Antenna

Abstract

The Yagi–Uda antenna is one of the most practical and commonly used antennas. It features high gain and low weight and profile, and is inexpensive to manufacture. In this article, the fundamental operation of the Yagi–Uda is discussed, as well as a classic graphical technique for obtaining a fixed gain design. Several modern versions of the Yagi–Uda antenna are also described that permit operation of the antenna at microwave frequencies and allow for simple integration into planar arrays.