Identification Of An Object, Animal Or A Person With The Uses Of Radio Frequency

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Introduction Identification of an object, animal or a person with the use of Radio frequency is the simple way to define RFID. Technically speaking, it is the technology that incorporates the use of electromagnetic or electrostatic coupling in the radiofrequency portion of the electromagnetic spectrum for the unique identification of the subject. History of RFID Radiofrequency identifies the subject by reading the tags attached to the subject. These tags contain electronically stored information which is captured by the reader. Tags may either be powered by electromagnetic induction, some may collect energy from the interrogating radio waves and act as passive transponder and some are powered by batteries and can operate at hundreds of…show more content…
Readers RFID systems can be classified by the type of tag and reader. A Passive Reader Active Tag (PRAT) system has a passive reader which only receives radio signals from active tags (battery operated, transmit only). An Active Reader Passive Tag (ARPT) system has an active reader, which transmits interrogator signals and also receives authentication replies from passive tags. An Active Reader Active Tag (ARAT) system uses active tags awoken with an interrogator signal from the active reader. Signalling Host manages Reader(s) and issues Commands:  Reader and tag communicate via RF signal  Carrier signal generated by the reader  Carrier signal sent out through the antennas  Carrier signal hits tag(s)  Tag receives and modifies carrier signal – “sends back” modulated signal (Passive Backscatter – also referred to as “field disturbance device”)  Antennas receive the modulated signal and send them to the Reader  Reader decodes the data  Results returned to the host application Miniaturization RFIDs are anything but difficult to disguise or join in different things. Hitachi holds the record for the smallest RFID chip, at 0.05mm × 0.05mm. Using so as to assemble is empowered the silicon-on-encasing (SOI) process. These dust-sized chips can store 38-digit numbers utilizing 128-piece Read Only Memory (ROM).[18] A noteworthy test is the connection of radio
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