The Intelligent Quadrifilar Helix: A Compact MIMO Antenna for IEEE 802.11n

A compact MIMO antenna solution, the intelligent quadrifilar helix antenna for the IEEE 802.11n standard is proposed. Analysis has been made with regard to design considerations and preliminary narrowband measurements have been carried out to evaluate its capacity potential in comparison to conventional spatially separated linear antennas. The results indicate that there is comparable capacity potential with nearly 70% reduction in size.