UHF frequency converter, local oscillator，wide band am plifier.

用于频频率转换,负载振,频放大。

Contains symbols for VHF, UHF, and SHF circuit design, including capacitance measurers, nonreciprocal devices, modulators, phase shifters, field polarization devices, and filters.

包含用于甚频、频和特频电路设计的符号，包电容测量、不可逆设备、调制、移相、场极化设备和滤波。

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.

频被动式射频辨识系统里，读取传送未调变过之连续波讯号给标签，其不但可提供能量给标签也作为标签反向散射讯号的载波。