70 likes | 263 Views
Radio Frequency Identification (RFID). What does an RFID tag look like?. microprocessor. radio antenna. Where’s the battery?!. Photo courtesy Getty Images. Physics Review - Induction. run electricity through a coil of wire an electro magnetic field is generated
E N D
What does an RFID tag look like? microprocessor radio antenna Where’s the battery?! Photo courtesy Getty Images
Physics Review - Induction • run electricity through a coil of wire • an electromagnetic field is generated • works the opposite way too!
RFID antenna • passing through an electromagnetic radio field powers the tag! • chip sends back a response using the antenna • response is an ID # back to the RFID reader Photo courtesy Getty Images
Supply chain usage of RFID • efficiently count and track goods! http://msdn.microsoft.com/en-us/library/ms954628.aspx
Other RFID uses • authentication • proximity access cards • passports • student attendance tracking • any wireless tagging