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通过对部件相位噪声性能的分析,进行结构指数最大化设计,得到最简总体结构设计。利用混频互调分量分析,避开各级混频组合干扰,得到系统各级结构的频率方案设计。利用DDS器件的结构优势对频率合成器结构进行优化,进一步简化设计结构。根据相位噪声性能的分析结果,进行环路滤波器设计,消除参数设计中的随意性,保证设计过程中系统的相位噪声性能。
Through the analysis of the phase noise performance of components, the maximum design of the structure index is achieved, and the simplest overall structure design is obtained. Mixing intermodulation component analysis is used to avoid mixed interference at all levels to get the frequency scheme design of all levels of the system. The structure of the frequency synthesizer is optimized using the structural advantages of DDS devices to further simplify the design structure. According to the results of the phase noise performance analysis, the loop filter design is performed to eliminate the randomness in the parameter design and ensure the phase noise performance during the design process.