In a UHF passive RFID system, a reader transmits an unmodulated continuous wave (CW) to tags, which not only provides energy to tags but also serves as the carrier of tag backscatter signals.
在超高频被动式射频辨识系,
取器传送未调变过之连
波讯号给标签,其不但可
量给标签也作为标签反向散射讯号的载波。