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Radio-frequency identification

(RFID) Small radio transponders or “tags” designed to be attached to items like products in a supermarket to allow the items to be identified and tracked by a remote system. Typically an RFID tag includes an integrated circuit that stores data and interfaces to the antenna, allowing the stored data to be retrieved by the remote system.


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  • Radio frequency interference

    hardware, testing (RFI) Electromagnetic radiation which is emitted by electrical circuits carrying rapidly changing signals, as a by-product of their normal operation, and which causes unwanted signals (interference or noise) to be induced in other circuits. The most important means of reducing RFI are: use of bypass or “decoupling” capacitors on each active device (connected […]

  • Radio-galaxy

    noun 1. a galaxy that emits much more strongly in the radio part of the spectrum than does a typical galaxy. noun 1. a galaxy that is a strong emitter of radio waves radio galaxy A galaxy that emits large amounts of radio energy. Radio galaxies are typically elliptical galaxies with large symmetrical lobes. The […]

  • Radiogenic

    [rey-dee-oh-jen-ik] /ˌreɪ di oʊˈdʒɛn ɪk/ adjective 1. Physics. produced by radioactive decay: radiogenic lead; radiogenic heat. 2. having qualities or characteristics that broadcast well; suitable for presentation on the radio. /ˌreɪdɪəʊˈdʒɛnɪk/ adjective 1. produced or caused by radioactive decay: a radiogenic element, radiogenic heat radiogenic (rā’dē-ō-jěn’ĭk)

  • Radiogold colloid

    radiogold colloid ra·di·o·gold colloid (rā’dē-ō-gōld’) n. A colloidal dispersion of a radioactive isotope of gold that emits a negative beta particle and a gamma ray for each atom of gold present, used for irradiating closed serous cavities and for liver scans.

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