中图分类号： TN836 文献标识码： A DOI：10.16157/j.issn.0258-7998.200516 中文引用格式： 杜海龙，段照斌，王伯阳. 基于锁相环路技术的二次雷达信号发生器设计[J].电子技术应用，2020，46(12)：134-138，143. 英文引用格式： Du Hailong，Duan Zhaobin，Wang Boyang. Design of secondary radar signal generator based on phase-locked loop technology[J]. Application of Electronic Technique，2020，46(12)：134-138，143.
Design of secondary radar signal generator based on phase-locked loop technology
Du Hailong1，Duan Zhaobin1，Wang Boyang2
1.Engineering Technology Training Center，Civil Aviation University of China，Tianjin 300300，China； 2.College of Aeronautical Engineering，Civil Aviation University of China，Tianjin 300300，China
Abstract： In order to meet the needs of laboratory teaching and research, based on phase-locked loop technology，this paper designed a secondary radar signal generator, to achieve the 700 MHz～1 100 MHz range of frequency synthesis. Firstly, the principle of frequency synthesis of phase-locked loop is analyzed, and the third-order passive loop filter is designed and realized. The high-frequency components generated by phase detector are filtered out and the phase-locked loop control circuit is formed with phase-locked loop chip ADF4350. Secondly, using the simulation tool ADI simPLL, the phase-locked loop is simulated and the parameters of the loop filter and the simulation output are obtained. Finally, the secondary radar signal generator system is built and the system output is analyzed by SPSS software. The results show that the system deviation is less than 0.02 MHz and the fixed deviation is in the range of 1 GHz～1.1 GHz band. After the compensation, system accuracy can be meet the needs of laboratory teaching and research well.
Key words : secondary radar；signal generator；phase-locked loop；frequency synthesis