So how does a receiving device convert radio waves to power. i mean,i know that radio is AC but what is the device called that goes between the antenna and the device that converts it to AC power?
Thanks
GK
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...