中图分类号：TN742 文献标志码：A DOI: 10.16157/j.issn.0258-7998.223650
中文引用格式：李世浩，蒋润秋，莫世波. 基于谐波混频的X波段频率源设计[J]. 电子技术应用，2023，49(12)：132-136.
英文引用格式：Li Shihao，Jiang Runqiu，Mo Shibo. Design of X-band frequency source based on harmonic mixing[J]. Application of Electronic Technique，2023，49(12)：132-136.

Design of X-band frequency source based on harmonic mixing

Abstract：In order to realize a high resolution, low phase noise, high spurious rejection, small size and low cost X-band frequency source, and to solve the problems of low frequency resolution of traditional phase-locked loop frequency synthesis and low output frequency of direct digital frequency synthesis, an X-band frequency source design method based on harmonic mixing and small-step phase-locked loop to improve phase noise and frequency resolution is proposed. This method adopts the architecture of harmonic mixing to output coarse step RF signal and HMC830LP6GE phase-locked loop to output fine step mixing loop, reducing the module's discrimination and fixing it to 1∶1.The results show that the X-band frequency source has an output frequency range of 8 GHz~12 GHz, an output power greater than 13 dB, a frequency step of 1 MHz, a spurious rejection better than 60 dBc, and a phase noise better than -115 dBc/Hz@10 kHz. The frequency source has the advantages of small hopping step, small size, low spurious and low phase noise, which can be applied to various applications requiring miniaturized, low phase noise and low spurious X-band frequency source.

Key words :X-band；frequency source；harmonic mixing；phase noise；spurious suppression