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.
超高频被动式
频辨识系统里，读取器传送未调变过之连
波
号给标签，其不但可提供能量给标签也作为标签反向
号的载波。
波激光器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.
超高频被动式频辨识系统里，读取器传送未调变过之连波号给标签，其不但可提供能量给标签也作为标签反向号的载波。
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