Gallium-nitride (GaN)
A wide band-gap semiconductor material that operates stably at high temperatures and with a higher breakdown-voltage than semiconductor technologies based on previous materials, such as silicon (Si)- or gallium-arsenide (GaAs)-based technologies.
 High electron mobility transistor (HEMT)
A field-effect transistor that takes advantage of operation of the electron layer at the boundary between different semiconductor materials that is relatively rapid compared to that within conventional semiconductors. Invented in 1979 by Dr. Takashi Mimura (currently a Fellow at Fujitsu Laboratories), this technology is currently widely used in various IT applications, including satellite transceivers, mobile phones, GPS-based navigation systems, and broadband wireless networking systems.
Name for the radio band from 75 to 110 GHz. Used for high-speed wireless communications, automotive radar, image sensors, etc.
 Noise figure (NF)
This is a number that establishes the minimum input level that can be used for an amplifier. By employing an amplifier with a low noise-index and high signal-gain in the front-end of a circuit, the rest of the circuit can be relatively unaffected by the noise figure, thus enabling a receiver that features good reception sensitivity.
 Digital divide
Refers to unequal access to information. Related to economic inequalities between people or regions with good access to electronic information and communications technology (especially the Internet) and those without.
 Impulse radio
A transmission technology that emits a broadband pulse signal that varies over an extremely short period, and which uses a filter to extract only the usable frequency component for transmission.
Fujitsu is a leading provider of IT-based business solutions for the global marketplace. With approximately 175,000 employees supporting customers in 70 countries, Fujitsu combines a worldwide corps of systems and services experts with highly reliable computing and communications products and advanced microelectronics to deliver added value to customers. Headquartered in Tokyo, Fujitsu Limited (TSE:6702) reported consolidated revenues of 4.6 trillion yen (US$47 billion) for the fiscal year ended March 31, 2009. For more information, please see: www.fujitsu.com.
Founded in 1968 as a wholly owned subsidiary of Fujitsu Limited, Fujitsu Laboratories Limited is one of the premier research centers in the world. With a global network of laboratories in Japan, China, the United States and Europe, the organization conducts a wide range of basic and applied research in the areas of Multimedia, Personal Systems, Network, Peripherals, Advanced Materials and Electronic Devices. For more information, please see: http://jp.fujitsu.com/labs/en/
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Date: 30 September, 2009
City: Tokyo and Kawasaki
Company: Fujitsu Limited, Fujitsu Laboratories Ltd., , , ,