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.
Contains symbols for VHF, UHF, and SHF circuit design, including capacitance measurers, nonreciprocal devices, modulators, phase shifters, field polarization devices, and filters.
He had a team of people working on this little scrappy left for dead UHF station called Channel 17 that only existed at first because it was playing old movies that were licensed for that purpose.
之连续波讯号给
，其不但可提供能量给
作为
它播放那些
的而获得许可的老电影。
的时候也在想，你是怎么知道
发出这些
用
