The Study and Implementation of Signal Detecting for Long Range HF Radio Frequency Identification

A new signal detecting method is proposed for long range HF Radio Frequency Identification(RFID), which is complement to the UHF RFID technique. The method is emphasized on how to enhance sensitivity and to increase working range of tags. The basic theory of tag's load modulation and the key features of backscatter signal are analyzed. The design of key nodes of the whole detecting channel is demonstrated in detail.