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Sociedade Brasileira de Telecomunicações

Beamforming of an E-shaped Linear Array for WLAN Systems Applying PSO Algorithm with Restrictive Approach


This paper presents a four-element linear array composed of E-shaped microstrip antennas designed to switched- beam application in WLAN systems. Particle Swarm Optimiza- tion (PSO) algorithm is applied to optimize the amplitude of the excitation currents applied to each array radiator aiming to yield four distinct beams with 25 dB suppression of sidelobes. For this application, it has been verified the necessity of a constraint of power applied to each radiator in the PSO optimization in order to improve the algorithm convergence and to achieve only feasible solutions which satisfy the imposed constraints.

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