Apple Inc.
Beamforming Architecture For Multi-Beam Multiple-Input-Multiple-Output (MIMO)

Abstract:

A Multiple-Input-Multiple-Output (MIMO) antenna array configuration is described in one example comprising a plurality of Radio Frequency (RF) chains, a plurality of antenna elements, and a plurality of phase shifters, wherein the antenna elements and phase shifters form a plurality of antenna arrays, and coupled to the RF chains, and the number of antenna arrays is larger than the number of RF chains.