Sidelobe Level Reduction in Linear Antenna Array synthesis Using Cuckoo Search & Accelerated Particle Swarm Algorithms

Array pattern synthesis is one of the most important problems in communication and radar applications. The synthesis is usually carried out by controlling amplitude and phase levels (or) element spacing functions of the array. Although, uniform linear arrays cost effective in terms of sources it is not preferred due to high presence of high first side lobe levels. For point to the point communications, and high angular resolutions radars, it is essential to generate low side lobe narrow beams. In view of these facts, a linear array is considered in the present work and it is optimally designed using CSA & APSO algorithms. The desired amplitude levels are evaluated using the algorithm with element spacing d=0.50. The main objective of this work is to minimize the sidelobe level with a constraint on beam width