INCREASING BACKSCATTER LEVEL FOR RFID CHIP

摘要

An input power on a tag (122, 124, 126, 128, 200) is monitored. An input impedance (Zin) of the tag is adjusted based on the monitored input power to increase a backscatter level of the tag. In one embodiment, an output voltage (Vout) of a rectifier device (208, 310) is monitored. An input power to the tag is determined based on the output voltage. An input impedance of the tag is adjusted based on the input power to increase the backscatter level of the tag.