Side lobe suppression is one of the most important design considerations of linear antenna arrayrnto reduce interference and wastage of radiation power. Side lobe level reduction also avoidrnindicating false target. The reduction of side lobes can be achieved by proper calibration of interrnelement spacing, excitation amplitude or both inter element spacing and excitation amplitude at arntime. In addition to these commonly used methods of side lobe suppression, changing thernorientation of selected elements by rotating them about the normal of the array axis can change thernpolarization of the element pattern. This technique can produce polarization variation as comparedrnwith uniformly oriented elements. The purpose of the rotation of elements is to create interferencernin the side lobe direction of non-rotated array elements. Due to this created interference, the sidernlobe level of the whole array can be suppressed. This thesis presented side lobe level suppressionrnof linear antenna arrays employing rotation of array elements. Simulations were performed usingrnMATLAB and genetic algorithm optimization tool has been used to find angle of rotation, interrnelement spacing and excitation amplitude. rn Employing rotation of symmetrically positioned array elements, side lobe levels of -17.15dB forrnuniformly spaced & uniformly excited linear array, -20.40dB for non-uniformly spaced &rnuniformly excited linear array, -27.25dB for uniformly spaced & non-uniformly excited linearrnarray and finally -28.02dB for non-uniformly spaced & non-uniformly excited linear arrays havernbeen obtained, as can be seen on result, for a total of 10 array elements. As compared to radiationrnpattern of uniform linear arrays without rotation of elements, the obtained results show significantrnreduction of side lobe level. As a result of this side lobe reduction, energy wastage and interferencernoutside of the main beam can be minimized with considerable amount and the performance of thernarray can be improved.