December 14, 2010
A new antenna, called a Plasma Silicon Antenna, or PSiAN, promises superfast wireless networks.
It consists of thousands of diodes on a silicon chip. When activated, each diode generates a cloud of electrons — the plasma — about 0.1 millimeters across. At a high enough electron density, each cloud reflects high-frequency radio waves. By selectively activating diodes, the shape of the reflecting area can be changed to focus and… read more