A sidelobe level reduction (SLL) for attenuators weight precision

The application of the genetic algorithms to the optimization of planar array weights will be investigated with -30 dB attenuators weight precision. The aim is to adjust the weight coefficients of the array attenuators in -30 dB precision to achieve a minimum sidelobe level (SLL) with narrower beam width. The peak sidelobe level (PSL) of the synthesized beam pattern has been successfully lowered. The results are compared with synthesized pattern using precision like weights such as Gaussian, Kaiser, Hamming, Blackman and Chebyshev weight coefficients and give a significant improvement for a peak sidelobe level (PSL). The minimum achieved peak sidelobe level (PSL) is -32 dB for beam width of 16° and -22.82 dB for beam width of 12°. © 2010 Elsevier Masson SAS. All rights reserved.