  This study presents a superdirective antenna array specifically designed for
the sub-6 5G generation frequency range, incorporating pioneering Huygens
antenna elements. The optimized structure achieves a realized gain that
surpasses Harrington's well-known maximum theoretical limit for antenna
directivity, effectively addressing practical concerns related to ohmic and
return losses. Additionally, the compact size of the proposed antenna array, as
opposed to a uniform linear array, offers the potential to fabricate highly
radiation-efficient, high-directivity antennas in a compact form.
