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    Electronic Resource
    Electronic Resource
    Bradford : Emerald
    Sensor review 14 (1994), S. 23-24 
    ISSN: 0260-2288
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Looks at radio frequency design relating to the expanding field of datatransmission with the arrival of purpose-made modules, particularly at418MHz. Describes the three main types of antennae to be considered at 418MHz, the vertical whip, the tuned loop and the helical. Discusses theparameters that are applied to systems of speed, distance, batteryconstraints, size, location of equipment and limited frequency allocation.Uses the example of a low power battery operated alarm system required toprovide security at a stables to show how various design problems can beovercome.
    Type of Medium: Electronic Resource
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