Genetic Algorithm Optimization of Log-Periodic Dipole Array

M Touseef,M Aziz-Ul-Haq,Umair Rafique,M Arif Khan,Qamar -Ud-Din,M Mansoor Ahmed

doi:10.5923/j.ijea.20120206.06

Abstract

Th is paper presents Genetic A lgorith m (GA) optimization of Log-Periodic Dipole Array (LPDA). Considering the fact that, an LPDA can effectively be used for different wireless communication systems such as WiMAX, GSM-I, GSM-II and WiFi, respectively. GA optimization is applied to the physical size of the antenna and on its gain. The proposed design is compared with the conventional LPDA design in terms of length, diameter and spacing between the dipole elements. Presented results show that, the proposed optimization approach can significantly imp rove the antenna gain and reduced its size. The size of the antenna is reduced up to 12% as compared to the conventional design. Also, the gain is imp roved fro m 9.1, 9.5, 9.2 and 8.5 d B to 10.7, 11.2, 9.9 and 9.1 d B for the desired co mmun ication bands. The reduction in size and increment in gain make LPDA an attractive choice for wireless applications.

Highlights

An antenna is a key co mponent in any wireless communicat ion system
This paper presents the design of an Log Periodic Dipole Array (LPDA) which can operate at W iMA X, GSM-I, GSM -II and W iFi wireless communicat ion bands
The main objective was to optimize an LPDA in such a way that, it works well in the desired frequency bands with the acceptable parameters which are physical size of an LPDA and its gain

Summary

Introduction

An antenna is a key co mponent in any wireless communicat ion system. These days, many wireless applications require high data rate at one hand, while small size o f antenna on another hand. For this purpose, it is necessary to design such kind of antenna which is very efficient in terms of gain and occupy small space in the system. The main advantage of an LPDA is that, it is essentially a frequency independent antenna for a certain mu lti-band communicat ion system[9]

Methods

Results

Conclusion