Story : http://phys.org/news/2012-05-antennas-major-mobile.html
Scientists at EPFL have developed a single antenna that is capable of transmitting the same data as a two-antenna system. This achievement will be more than useful for future communication systems.
How can the challenges presented by the ever-growing number of wireless mobile devices and the demand for increasingly high data be met without increasing energy consumption and emission power? Currently MIMO (multiple-input, multiple outputs) uses several antennas to transmit and receive signals. This technique is progressively being implemented in devices such as wireless modems and is to be used for the next generation of mobile phones. However, it poses problems because it is costly and difficult to integrate into hardware.
At EPFL, Julien Perruisseau-Carrier’s group has demonstrated that a single antenna can simultaneously transmit two separate signals that have the same throughput as a MIMO solution. The results were published at the beginning of the year, and part of the new findings will be presented by Julien Perruisseau-Carrier, at the IEEE International Symposium on Antennas and Propagation in Chicago, at the beginning of July.