Optimization Strategies for Multibeam Transmitarray Antennas for 5G Systems

Multibeam antennas are the enabling technology for the realization of Multiple-Input Multiple-Output (MIMO) architectures to be used in 5G communication systems. Here, their feasibility with a Transmitarray (TA) is investigated, and three different approaches for their design are presented. The first one is a deterministic method, aimed to design a bifocal surface, the second proposes the use of a concave TA, while the other technique is based on the use of a pseudo-stochastic optimization algorithm