A wireless communications module includes: a primary board including (i) a first surface bearing a radio controller, and defining a set of control contacts for connection to respective ports of the radio controller, and (ii) a second surface opposite the first surface; an antenna array integrated with the primary board, the antenna array including a plurality of unit cells each having: an inverted-L antenna having a planar element adjacent to the second surface of the primary board, and an orthogonal element extending from the planar element to a feed layer within the primary board; and a passive patch element between the planar element and the feed layer.