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RFIDs

RFIDs. Ian Adams CMPT 220 2/6/13. What are RFIDs. RFID stands for Radio Frequency Identification Wireless radio frequency system used to track, identify and transfer data from a tag to an object

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RFIDs

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  1. RFIDs Ian Adams CMPT 220 2/6/13

  2. What are RFIDs • RFID stands for Radio Frequency Identification • Wireless radio frequency system used to track, identify and transfer data from a tag to an object • Used in people, animals, libraries, warehouses, transportation, stores, credit cards, passports, and many other things • Operated anywhere from 100Khz-10GHz Range • Can store anywhere from 128B of data to 128KB

  3. Terminology • Tag – Also known as a label, attached to an object that is to be identified • Reader – Also known as an interrogators, is a two way radio transmitter/receiver that sends a signal to the Tag and receives its resonce.

  4. Different Types of RFIDs • Passive Reader Active Tag (PRAT) – the system uses a passive reader which can only read active tags. • The tags are battery operated and are transmit only. The Reader in this case acts only as a receiver.

  5. Different Types of RFIDs • Active Reader Passive Tag (ARPT) – The reader sends signals to a Tag and receives the reply. • Known as Passive RFID • Most common in terms of variety. • In most ways, inferior to ARAT.

  6. Different Types of RFIDs • Active Reader Active Tag (ARAT) – The reader and Tag are both active. Also known as a Battery Assisted Passive. Tag has a Battery and is Passive until “awakened” by a Reader, at which point the Battery powers the Tag • Known as Active RFID • EZ-Pass, Warehouses, Large Farms • Best used when numerous objects need to be tagged and read. • Good in Biometric uses.

  7. Limitations • The smaller the RFID, the weaker the signal. • The more RFIDs, the more Radio Traffic, interference. • High Temperatures can cause the glue used in the RFID (holds the Integrated Circuit to the Circuit Board) to come undone and render the RFID useless.

  8. Concerns • Privacy. • Data on the Radio signals • Swiping a Credit Card without user knowing • Government Control. Big Brother • If Everything has an RFID, ID of everything and everyone is always known. • Radiation. • Just like those who fear Cell Phones and/or Microwaves, etc.

  9. Bibliography • http://en.wikipedia.org/wiki/RFID • http://www.stitcs.com/en/RFID/Active%20vs%20Passive%20RFID.pdf • http://en.wikipedia.org/wiki/Ez_pass • http://auto.howstuffworks.com/e-zpass2.htm • http://www.rfidwikipedia.org/index.php/Main_Page

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