An antenna array comprising at least two groups of antennas where each
group comprises at least two pairs of antennas. Each of the pairs in a
group contains orthogonally polarized antennas and at least one antenna in
a pair is similarly polarized to one antenna in at least another pair in
the group. The antenna array further comprises circuitry coupled to the
antenna groups to select and activate certain antennas in a group to
enable the antenna array to operate in either a beam forming/steering
mode, a diversity mode or a MIMO mode or any combination thereof. The
antennas in the groups are activated based on the characteristics of the
signals being transmitted or received by the antenna array.
