radio frequency amplifier

例句：

1. 1. The radiofrequency amplifier is used to amplify the weak signals from the antenna.
   无线电频率放大器用于放大天线的弱信号。
2. 2.The radio frequency amplifier is essential for transmitting and receiving signals over long distances.
   无线电频率放大器对于在长距离上传输和接收信号至关重要。
3. 3.The radio frequency amplifier is designed to improve the quality of the audio signal.
   无线电频率放大器旨在提高音频信号的质量。