CINRAD/CC频率源稳定度对雷达回波的影响

频率源稳定度是多普勒雷达的一项重要指标,如果雷达频率源本身存在频率起伏和相位起伏,就无法获得精确的强度和速度场信息。简要介绍了CINRAD/CC频率源的合成方式及主要信号流程,同时回顾频率源稳定度的表征方法及其联系。研究频率源短、长期稳定度的影响因素,利用雷达维修平台模拟再现故障,讨论了改进频率源稳定度的措施,从而实现现场快速判断、维修的目的。通过时域、频域并结合实际例证分析总结出在现代雷达中,频率源的相位噪声(稳定度)是影响雷达回波强度和速度测量的主要因素。这些技术和方法在CINRAD/CC频率源维修维护工作中具有一定的借鉴作用。

Impact of CINRAD/CC Frequency Source Stability on Radar Echoes

Frequency source stability is an important indicator of Doppler radar. If there is frequency amplitude and phase fluctuations in the radar frequency itself, it is impossible to obtain accurately strength and velocity field information. An introduction is made to the composite methods and main signal process of CINRAD/CC frequency sources, as well as the characterization methods of frequency source stability and its relationship. The impacts of the short and long term stability on frequency source formation are studied, and the radar repair platform is used to simulate the fault. The measures how to improve the frequency stability are discussed, aiming at the rapid judgment and repair. It is summarized by means of time domain and frequency domain, combining with practical illustrations, that the phase noise (stability) of frequency sources is the main factor influencing radar echo intensity and speed measurements in modern radar. These techniques have certain reference significance for repair and maintenance of CINRAD/CC frequency sources.