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一、引言脉冲多卜勒雷达的速度分辨力和对固定目标的杂波抑制能力等,主要取决于接收机的频率源和发射机的激励源的频谱纯度。为满足机载多卜勒雷达的应用,要求频率源有特低的相位噪声和特小的体积,并要求频率源能在恶劣的环境中工作。为研制符合上述要求的频率源,选择抑制噪声的方案是很重要的。根据国内现有器
I. INTRODUCTION The speed resolution of pulsed Doppler radar and the clutter suppression of fixed targets depend mainly on the spectral purity of the receiver’s frequency source and transmitter’s excitation source. In order to meet the application of airborne Doppler radar, it is required that the frequency source has extremely low phase noise and a very small volume, and requires the frequency source to work in a harsh environment. In order to develop a frequency source that meets the above requirements, it is important to choose a scheme that suppresses noise. According to the domestic existing device