RFID communication board
NOW has developed an RFID communication board, together with antennas. The board reads both half and full duplex RFID tags. A carrier wave from a TX antenna activates the RFID tag who answers with an ID, and this answer is received by an RX antenna. Analogue filters filter the signal from the tag, and the filtered data is A/D converted in an ARM processor with digital filters. The decoded ID is then sent to the host computer. The advanced analogue and digital filters givs a reading range of 1-1.5 feet, to compare with the more normal a 2-3 inches for commercial systems.