1. Hyperlink technologies, http://www.hyperlinktech.com
2. Phocus Array Antenna by Fidelity Comtech, http://www.fidelity-comtech.com/
3. Ruckus wireless smart antenna, http://www.ruckuswireless.com/
4. Blanco, M., Kokku, R., Ramachandran, K., Rangarajan, S., Sundaresan, K.: On the Effectiveness of Switched-beam Antennas in Indoor Environments, Technical report, NEC Laboratories America (2007), http://www.nec-labs.com/ravik/RESEARCH/dir-tech.pdf
5. Carey, J.M., Grunwald, D.: Enhancing wlan security with smart antennas: a physical layer response to information assurance. In: VTC (September 2004)