  This study introduces an novel approach to the design of low-profile
superdirective antenna arrays, employing parasitic elements. The proposed
design concept was verified through the analysis of a two-element antenna array
consisting of strip dipoles, operating at a frequency of $3.5$ GHz within the
sub-6 5G frequency band. The antenna array was optimized for realized gain, a
key antenna parameter considering both ohmic and return losses. The design
parameters included the lengths and widths of the strip dipoles, along with a
reactance load connected to the parasitic element. The driven element was
excited by a sinusoidal voltage signal with a magnitude of $1$ V, eliminating
the need for amplifiers, attenuators, phase shifters, or impedance matching
networks. Results demonstrated that this design concept enables the achievement
of superdirectivity, with inter-element distances as small as $0.1\lambda$,
resulting in low-profile, compact, high directional antenna systems.
