OPTIMIZATION OF AN ANTENNA ARRAY USING GENETIC ALGORITHMS

An array of antennas is usually used in long distance communication. The observation of celestial objects necessitates a large array of antennas, such as the Giant Metrewave Radio Telescope (GMRT). Optimizing this kind of array is very important when observing a high performance system. The genetic...

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Bibliographic Details
Published in:The Astronomical journal 2014-06, Vol.147 (6), p.1-13
Main Authors: KIEHBADROUDINEZHAD, SHAHIDEH, NOORDIN, NOR KAMARIAH, Sali, A, Abidin, Zamri Zainal
Format: Article
Language:English
Subjects:
ALGORITHMS
Antenna arrays
Antennas
Arrays
ASTRONOMY
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
DISTANCE
DISTRIBUTION
Genetic algorithms
INTERFEROMETERS
MATHEMATICAL SOLUTIONS
OPTIMIZATION
Planes
RADIO TELESCOPES
Sidelobes
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Summary:An array of antennas is usually used in long distance communication. The observation of celestial objects necessitates a large array of antennas, such as the Giant Metrewave Radio Telescope (GMRT). Optimizing this kind of array is very important when observing a high performance system. The genetic algorithm (GA) is an optimization solution for these kinds of problems that reconfigures the position of antennas to increase the u-v coverage plane or decrease the sidelobe levels (SLLs). This paper presents how to optimize a correlator antenna array using the GA. A brief explanation about the GA and operators used in this paper (mutation and crossover) is provided. Then, the results of optimization are discussed. The results show that the GA provides efficient and optimum solutions among a pool of candidate solutions in order to achieve the desired array performance for the purposes of radio astronomy. The proposed algorithm is able to distribute the u-v plane more efficiently than GMRT with a more than 95% distribution ratio at snapshot, and to fill the u-v plane from a 20% to more than 68% filling ratio as the number of generations increases in the hour tracking observations. Finally, the algorithm is able to reduce the SLL to -21.75 dB.
ISSN:0004-6256
1538-3881
1538-3881
DOI:10.1088/0004-6256/147/6/147