低噪声放大变频器将天线接收的微弱信号放大后再将其变频为 l 波段中频信号的一体化前置接收器件
A low-noise amplification frequency converter is an integrated pre-receiving device that amplifies the weak signal received by the antenna and then converts it into an L-band intermediate frequency signal
以上为机器翻译结果，长、整句建议使用 人工翻译 。