An antenna array and a system including the antenna array are provided for implementing wireless communication in a wearable device. The antenna array includes a first plurality of antennas integrated with an antenna substrate and a second plurality of antennas integrated with the antenna substrate. Each antenna in the first plurality of antennas is disposed perpendicular to a ground plane, and each antenna in the second plurality of antennas is disposed parallel to the ground plane. The first plurality of antennas and the second plurality of antennas generate omni-directional electro-magnetic (EM) radiation in at least two different polarizations, which makes the antenna array suitable for wearable applications.