Side-lobes Suppression for 5G Millimeter Wave Sparse Array Antenna

In many 5G engineering applications, narrow scanning beams is required for antenna array without corresponding gain. This type of application can also be achieved by adopting a non-periodic arrangement of the antenna elements on the array aperture to reduce the cost of the antenna system by achieving technical specifications with fewer antenna elements and suppression of side lobes. Therefore, this paper is aimed at synthesizing different constraints for the millimeter wave non-periodic sparsely distributed antenna array. The genetic algorithm is applied to different constraints of non-periodic distributed arrays to optimize the array layout. In the sparse optimization problem of millimeter wave planar array, sometimes it is necessary to meet certain specific requirements. For example, in order to ensure a certain array aperture, array elements must be provided at the four corners of the planar array. In order to ensure the sum or the difference radiation pattern, the sparse plane array is required to be symmetrical on the top, the bottom, the left and the right.