- #1
GrannyKlump
- 2
- 0
i was reading an article about the new RFID tags that could replace ATM cards. these tags respond to query via a radio tranmission. the tag then uses the power that was in the initial radio transmission to reply back to the system. how are the tags using the power from the transmission? can anyone point me to a site or a book that has that information in it.
here is a link to the article.
http://www.msnbc.com/news/997952.asp?cp1=1
"They listen for a radio query and respond by transmitting a unique ID code..." "Most RFID tags have no batteries. They use the power from the initial radio signal to transmit their response."
Thanks
Granny
here is a link to the article.
http://www.msnbc.com/news/997952.asp?cp1=1
"They listen for a radio query and respond by transmitting a unique ID code..." "Most RFID tags have no batteries. They use the power from the initial radio signal to transmit their response."
Thanks
Granny