Influence of the Geometrical Parameters of a Planar Yagi-Uda Antenna on its Performances

Abstract The paper follows the construction of a planar Yagi Uda antenna and the influence of the geometrical parameters on its characteristic parameters. According to the studies conducted on classical Yagi Uda antennas, modifying their geometrical parameters can lead to the improvement of the antenna function. Thus, the authors will consider modifying the number of directors, the distance between the fed dipole and the first director, the distance between the directors and the length of the directors in an attempt to determine their influence on the antenna’s characteristic parameters. All the results are compared and the similitude between planar and classical antenna is highlighted. Some of the most important antenna parameters were analyzed namely S parameters, gain, directivity, frequency bandwidth and radiation pattern.