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统里,读取器传送未之连
波讯
签,其不但可提供能量
签也作为
签反向散射讯
的载波。