Yagi-Uda Antenna

The Yagi-Uda (in further text Yagi) antenna is basically a dipole antenna, whose radiation is focused by a series of parallel dipoles and a reflector behind. It is mostly used in radio links for computer (Wi Fi) networks, as well as a receiver for TV and FM radio signals.

Two models of Yagi antennas are simulated in WIPL-D. In the first, the radiating element, ten directors and reflector are modeled as wires, while in the second one they are made of plates (solid body). The application of symmetry is discussed in details.

Simulations are done extremely quickly (in seconds) at regular desktop PC, with low number of unknowns. The application note also shows the advantages of using the wire models. They are order of magnitude easier to develop and simulate. This can lead to the solution of very complex problems, involving thousands of wire elements, without using the more precise and demanding plate models.

Section: Antenna Design

For full version of the document, please check the following pdf.