Glossary

Antenna

11.10.08

An antenna is a transducer designed to transmit or receive electromagnetic waves. In other words, antennas convert electromagnetic waves into electrical currents and vice versa. Antennas are used in systems such as radio and television broadcasting, point-to-point radio communication, wireless LAN, radar, and space exploration. Antennas usually work in air or outer space, but can also be operated under water or even through soil and rock at certain frequencies for short distances. Physically, an antenna is an arrangement of conductors that generate a radiating electromagnetic field in response to an applied alternating voltage and the associated alternating electric current, or can be placed in an electromagnetic field so that the field will induce an alternating current in the antenna and a voltage between its terminals.
Source: Wikipedia
URL: http://en.wikipedia.org/wiki/Antenna_(radio)
  • Internet of Things

    In computing, the Internet of Things refers to a usually wireless and self-configuring network between objects, such as household appliances. The concept of the internet of things is attributed to the original Auto-ID Center, founded in 1999 and base…
    11.12.08

  • Smart Dust

    Smartdust is the term used to describe a network of tiny wireless microelectromechanical systems sensors, robots, or devices, installed with wireless communications, that can detect light, temperature, or vibration.Source: WikipediaURL: http://en.wik…
    11.12.08

  • PDA

    A personal digital assistant is a handheld computer also known as small or palmtop computers. Newer PDAs also have both color screens and audio capabilities, enabling them to be used as mobile phones,, web browsers, or portable media players. Many PD…
    11.07.08

  • PCMCIA

    The Personal Computer Memory Card International Association is an international standards body that defines and promotes the PC Card and ExpressCard standards. Although the organization's name refers to memory cards, their standards are not limited t…
    11.07.08

  • Near Field Communication (NFC)

    Near Field Communication or NFC, is a short-range high frequency wireless communication technology which enables the exchange of data between devices over about a 10 centimetre (around 4 inches) distance.[1] The technology is a simple extension of th…
    11.07.08

  • Wireless ad hoc network

    A decentralized wireless network. The network is ad hoc because each node is willing to forward data for other nodes, and so the determination of which nodes forward data is made dynamically based on the network connectivity. This is in contrast to w…
    11.03.08

  • Key-Distribution Centre

    In cryptography, a key distribution center (KDC) is part of a cryptosystem intended to reduce the risks inherent in exchanging keys. KDCs often operate in systems within which some users may have permission to use certain services at some times and n…
    11.03.08

  • Wireless Local Area Network (WLAN)

    A wireless LAN or WLAN or wireless local area network is the linking of two or more computers or devices using spread-spectrum or OFDM modulation technology based to enable communication between devices in a limited area. This gives users the mobilit…
    11.03.08

  • ZigBee

    ZigBee is the name of a specification for a suite of high level communication protocols using small, low-power digital radios based on the IEEE 802.15.4-2006 standard for wireless personal area networks, such as wireless headphones connecting with ce…
    11.03.08