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统里,读取器传送未调变过之连
波讯号
签,其不但可提供能
签也作为
签反向散射讯号的载波。