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Yagi-uda antenna design and modeling for gain and bandwidth optimization for wifi applications


M. A. Halliru
S. A. Babale
S. H. Lawan
S. Muhammad
A. A. Abubakar
J. J. Tiang
M. Roslee
S. M. Yusuf

Abstract

This research focuses on designing and simulating the Yagi-Uda antenna with folded dipole as a driven element for gain and bandwidth optimization. Four models were investigated to guide the designer in choosing the most suitable model for Wi-Fi applications with a resonance frequency of 2.4 GHz. The designed antenna shows promising results in terms of bandwidth, gain, reflection coefficient |S11|, and directivity. The proposed design produced a bandwidth (BW) of 0.33 GHz with a corresponding peak realized gain of 10.43 dB when the driven element was replaced with the folded dipole, at 2.40 GHz. The design achieved a directivity of 10.44 dBi, and a voltage standing wave ratio (VSWR) of 1.01:1. This suggests a good matching between the transmission line (TL) and the folded dipole. The high input impedance of approximately 300 Ω is another significant advantage of using a folded dipole. The |S11| of the optimized design is -52.018 dB at 2.40 GHz. This research has application in broadband services where high gain and bandwidth is of concern, such as backhauling using point-to-point and point-to-multipoint services. An appreciable gain is maintained with an improved bandwidth of 4% compared to existing works.


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eISSN: 2705-3954
print ISSN: 0794-4756