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.
在超高被
式
识系统里,读取器传送未调变过之连续波讯号给标
,其不但可提供能量给标
也作为标
反向散
讯号的载波。