Genatic Algorithm for Reducing the Side Lobe Level of Main Beam of Uniformly Excited Time Modulated Linear Array Antenna
S. K. Mandal1, G. K. Mahanti2, Rowdra Ghatak3
1S. K. Mandal, Electronics & Communication Engineering Department, National Institute of Technology, Durgapur, West Bengal, India.
2G. K. Mahanti Electronics & Communication Engineering Department, National Institute of Technology, Durgapur, West Bengal, India.
3Rowdra Ghatak, Microwave and Antenna Research Laboratory, ECE Dept., National Institute of Technology, Durgapur, West Bengal, India.
Manuscript received on December 02, 2011. | Revised Manuscript received on December 14, 2011. | Manuscript published on January 05, 2012. | PP: 168-172 | Volume-1 Issue-6, January 2012. | Retrieval Number: F0291111611/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The Side Lobe Level (SLL) of the main beam of a uniformly excited time modulated antenna array is reduced to less than -55 dB by using Genetic Algorithm (GA). For a uniformly excited linear antenna array the maximum side lobe level is ~ -13.5 DB. In this work the uniformly excited antenna array is first time modulated and then the on-time sequences of each of the array elements are optimized by applying GA to get the desired result.
Keywords: Time Modulated Linear Array (TMLA), Side lobe level (SLL), Side band radiation (SBR), Genetic Algorithm (GA).