Multi/Broad-Band Phased Array Enabling Capacity and Physical-Layer Security in Cyberspace Mobile Communications for 5G and Beyond

Broadband/multiband phased array antennas with wide-scan and smart beam-steering are desirable to meet the capacity and security requirements of 5G and beyond. This paper discusses the characteristics of a new beam-steerable phased array design having broadband/multiband function for 5G and beyond communications. The discussion is focused on smartphones, due to their small size and complexity. The design procedure is straightforward and accomplished on a mainboard of future smart handheld devices. The introduced phased array design involves eight Yagi-dipole resonators with a $1\times 8$ linear form. The resonators have small sizes with discrete feedings. For -10 dB, the design represents dual broad bands including 22–33 GHz and 38–65 GHz covering multiple bands in the 5G and beyond spectrums.