Optimizing Energy Utilization in Unequally Spaced Linear Array for Smart Antenna
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Date
2019
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Faculty of Engineering, University of Maiduguri
Abstract
Radiation in unwanted patterns, energy wastage and reduction are caused by high side lobe
levels in a radiation pattern. This in turn affects the overall performance of the antenna. The
purpose of this work is to improve the performance of a smart antenna by optimizing the
radiation pattern using genetic algorithm. Optimal antenna parameters that would minimize
side lobe level were obtained using genetic algorithm. Simulations were carried out to
determine the impact of the increase in inter-element spacing on array factor and beamwidth
using the optimal antenna parameters. The optimal arrangement of inter-element spacing and
number of elements in unequally spaced antenna elements were then considered. The array
factor model for a uniform linear array of elements was used with the aim of obtaining the
optimum weights that would give a radiation pattern with reduced side lobe level. It was
observed from the results for unequally spaced linear arrays, using all the possible
configurations, that non-tapered arrangement gave the best improvement in the side lobe
level. The outcome of this improvement is an optimized radiation pattern which is expected
to aid the reduction of radiated power wasted in the side lobes of linear arrays in antenna
systems.
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Keywords
Performance Evaluation, Unequally Spaced Antenna Array, Optimizing Energy Utilization