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.
在高频被动式射频辨识系统里,读取器传送未调变过
连续波讯号给
,其不但可提供能量给
也作
反向散射讯号的载波。