这些无线电系统之间就像光波与声波一样彼此区别，比如，人造卫星就无法追踪射频识别标签。
These radio systems are as different from each other as light is from sound, so satellites cannot track RFID tags, for instance.
在现代无线通信系统中，对发射信号进行直接射频调制已成为射频无线电的发展趋势。
In modern wireless communication system, the direct RF-modulation for transmitting signal is a new developing trend of RF radio.
在双路无线电系统或天线系统中，发射的总射频功率是关键参数，功率计就是一个非常好的解决方法。
When total RF power transmitted is the key parameter-in a two-way radio system or an antenna system, for example-an RF power meter is an excellent solution.
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