One of the main hardware required for 5G end-user applications is an active antenna system. These active antenna systems enable the concept of remote radio head by integrating the antenna and meet 5G challenges of enhanced capacities using space diversity and localized beams via massive multiple-input multiple-output (MIMO) technology. These MIMOs are used in 5G base stations and smartphones. These antennas are made of printed circuit boards PCB that use various substrate materials such as…

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