Wireless security know it all 15 b newsobisvn o 2 weeks ago 645 by sobisvn in books ebooks 2009 isbn 9781856175296 english 726 pages pdf 138 mb the newnes know it all series takes the best of what our authors have written to create hard working desk references that will be an engineers first port of call for key information design techniques and rules of thumb . Radio frequency identification rfid uses electromagnetic fields to automatically identify and track tags attached to objects an rfid system consists of a tiny radio transponder a radio receiver and transmitter when triggered by an electromagnetic interrogation pulse from a nearby rfid reader device the tag transmits digital data usually an identifying inventory number back to the reader
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