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Elements Space and Amplitude Perturbation Using Genetic Algorithm for Antenna Array Sidelobe Cancellation
Reza Abdolee, Tharek Abd Rahman, Vida Vakilan
Pages - 10 - 16 | Revised - 15-04-2008 | Published - 30-04-2008
Published in Signal Processing: An International Journal (SPIJ)
MORE INFORMATION
KEYWORDS
Genetic algorithm, antenna array, sidelobe cancellation
ABSTRACT
A simple and fast genetic algorithm (GA) developed to reduce the sidelobes in non-uniformly spaced linear antenna arrays. The proposed GA algorithm optimizes two vectors of variables to increase the Main lobe to Sidelobe power ratio (M/S) of array’s radiation pattern. The algorithm, in the first phase calculates the positions of the array elements and in the second phase, it manipulates the amplitude of excitation signals for each element. The simulations performed for 16 and 24 elements array structure. The results indicated that M/S improved in first phase from 13.2 to over 22.2dB meanwhile the half power beamwidth (HPBW) left almost unchanged. After element replacement, in the second phase, by using amplitude tapering further improvement up to 32dB was achieved. Also, the simulations shown that after element space perturbation, some antenna elements can be merged together without any performance degradation in radiation pattern in terms of gain and sidelobes level.
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Mr. Reza Abdolee
- Malaysia
Mr. Tharek Abd Rahman
- Malaysia
Mr. Vida Vakilan
- Malaysia
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