Performance Optimization of Yagi-Uda Antenna in Wireless Communication with Additional Driven Elements using Genetic Algorithms

J.R. Mohammed (Iraq)

Keywords

Genetic Algorithm, YagiUda Array, Two DipoleElements, Wireless Communications.

Abstract

A new structure of Yagi-Uda antenna is proposed that can improve the forward/backward ratio (f/b) significantly while maintaining a high gain. This structure involves the addition of two driven dipole elements to the main Yagi Uda array, the resulting antenna is denoted by augmented Yagi-Uda. The design of such antenna is performed using GA in conjunction with the SNEC software. Comparisons are made among the augmented and conventional Yagi Uda configurations for different design parameters. It is observed that an improvement of at least 66dB in the f/b ratio is obtained. Moreover, the augmented antenna outperforms the conventional Yagi-Uda antenna, because it achieves higher performance standards over an extended bandwidth around 2.4GHz.

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