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1. An array antenna comprising: a ground plane; a phase shifter circuit comprising a plurality of phase shifters, each of the plurality of phase shifters electrically coupled to a radio frequency (RF) source, the RF source configured to provide a RF signal to the phase shifter circuit; and a plurality of antennas arranged on the ground plane in a row-column configuration, each of the plurality of antennas configured to communicate over a frequency band ranging from 24 GHz to 52 GHz, each of the plurality of antennas comprising: a column substrate coupled to the ground plane, the column substrate having a plurality of faces, such that the phase shifter circuit configured to provide the RF signal to each of the plurality of faces and configured to adjust a phase angle associated with the RF signal, the phase angle of the RF signal provided to each of the plurality of faces of the column substrate are different; a plurality of antenna elements, each of the plurality of antenna elements disposed on a different face of the plurality of faces of the column substrate, wherein each of the plurality of antenna elements comprises: a bottom portion; a first vertical portion extending from the bottom portion; a second vertical portion extending from the bottom portion; a first horizontal portion extending from the first vertical portion; and a second horizontal portion extending from the second vertical portion; and one or more parasitic elements, each of the one or more parasitic elements disposed on a different face of the column substrate, each of the one or more parasitic elements electrically coupled to a corresponding antenna element.
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