Synthesis of Aperiodic Antenna Array with Minimum Sidelobe Levels Using Modified Differential Evolution
Prasad Rao Rayavarapu1, Dharma Raj Cheruku2, Srinu Budumuru3

1Prasad Rao Rayavarapu, Department of ECE, Avanthi College of Engineering, Visakhapatnam (A.P), India.
2Dharma Raj Cheruku, Department of ECE, GITAM University, Visakhapatnam (A.P), India.
3Srinu Budumuru, Assistant Professor, GIT, GITAM University, Visakhapatnam (A.P), India.
Manuscript received on 07 March 2019 | Revised Manuscript received on 20 March 2019 | Manuscript published on 30 March 2019 | PP: 218-224 | Volume-8 Issue-5, March 2019 | Retrieval Number: E2976038519/19©BEIESP
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Abstract: The Antenna array is an essential part in the wireless communication systems. Design of a low sidelobe level antenna arrays crucial in design of the efficient antenna array system. In this paper, the synthesis of an aperiodic antenna array synthesis for minimal sidelobe levels has been discussed. A novel modified differential evolution (MDE) is proposed for controlling the sidelobe energy by optimizing the antenna element positions. Different mutation schemes have been adopted in developing the MDE algorithm. The steps involved in the development of MDE and problem formulation for the minimizing sidelobe levels is discussed clearly. Various popular synthesis examples have been considered and synthesized. Both small and larger arrays have considered in this paper. The obtained proposed MDE array designs are compared with the traditional differential evolutions (DE) and particle swarm optimization methods (PSO). Numerical results demonstrated that the proposed MDE method outperforms the traditional PSO and DE in terms of producing low PSLL and convergence rate.
Keyword: Antenna Array, Sidelobe Level, Differential Evolution, Particle Swarm Optimization, PSLL, Convergence Rate.
Scope of the Article: Smart Antenna