Patent ID: 8130169

Claim:
A multi-input multi-output antenna system, comprising: a plurality of dual-feed and dual-band antennas, each dual-feed and dual-band antenna comprising: a substrate; a grounding unit, formed on the substrate, and having two opposite sides; a first radiating unit, formed on the substrate and disposed near one side of the grounding unit; and a second radiating unit, formed on the substrate and disposed near another side of the grounding unit, and the second radiating unit having a shorting element that is electrically connected to the grounding unit; wherein the dual-feed and dual-band antennas are arranged into a polygon on a plane, and the polygon is bound by lengthwise projection lines of the dual-feed and dual-band antennas; wherein the first radiating unit of one of the dual-feed and dual-band antennas disposed on a side of the polygon is situated adjacent to the second radiating unit of the adjacent dual-feed and dual-band antenna disposed on another side of the polygon.