低相位噪声微波振荡器设计

发布时间：2018-03-25 16:06

本文选题：频率合成技术　切入点：微波振荡器　出处：《中北大学》2015年硕士论文

【摘要】：为满足微波毫米波测试仪器及系统需求，，顺应仪器小型化和模块化发展趋势，特别针对Ku和Ka波段上下变频装置和PXI总线微波毫米波测试仪器及系统需求，设计了小型化低相位噪声微波振荡器和PXI模块低相位噪声微波振荡器。首先，阐述了微波振荡器的设计技术及方案，比较了各方案的优缺点。通过对Ku和Ka波段上下变频装置中微波振荡器指标分析，选择了单环锁项式频率合成技术方案。其次，基于锁相环相位噪声计算方法，计算了不同鉴相频率、鉴相器灵敏度、环路带宽锁相环的相位噪声，分析了锁相环相位噪声最主要的影响因素，得出了微波振荡器实现低相位噪声的电路参数和锁相芯片的配置参数，解决了微波振荡器低相位噪声的关键技术。然后，基于单片集成锁相环芯片HMC704LP4E和集成VCO芯片V940ME24-LF设计了微波振荡器电路，较好的实现了微波振荡器的小型化。利用Altuim Designer10.0电路设计软件微波振荡器的PCB进行了设计，利用中电四十一所测试设备测试了实物的指标。测试结果表明，振荡器的相位噪声指标与理论计算值基本一致，且达到设计指标。验证了设计方案的有效性和可行性，可满足实际的工程应用。最后，通过对PXI模块微波振荡器指标分析，选择了混频锁相式频率合成技术方案，设计了PXI总线接口和微波振荡器，同时详细介绍了电路设计过程和计算了不同N分频比微波振荡器输出相位噪声指标，通过比较得出了混频锁相电路的最佳参数设置，实现了微波振荡器的低相位噪声指标的要求。在此基础上，介绍了PXI总线的软件配置和锁相芯片的配置参数，最后，利用Altuim Designer10.0电路设计软件设计了PXI模块微波振荡器的PCB，并对实物进行了测试。测试结果表明，振荡器的相位噪声指标与理论计算值基本一致，且达到设计指标，可满足PXI总线自动测试系统的应用。
[Abstract]:In order to meet the requirements of microwave millimeter-wave testing instruments and systems and conform to the development trend of miniaturization and modularization of instruments, especially for Ku and Ka-band up-conversion devices and PXI bus microwave millimeter-wave testing instruments and systems, The miniaturized low phase noise microwave oscillator and the PXI module low phase noise microwave oscillator are designed. Firstly, the design technology and scheme of microwave oscillator are introduced, and the merits and demerits of each scheme are compared. By analyzing the index of microwave oscillator in Ku and Ka-band up-conversion device, the single-link term frequency synthesizer is selected. Secondly, based on the phase noise calculation method of PLL, the phase noise of PLL with different phase frequency, phase discriminator sensitivity, loop bandwidth PLL is calculated, and the main influencing factors of PLL phase noise are analyzed. The circuit parameters of microwave oscillator to realize low phase noise and the configuration parameters of phase-locked chip are obtained. The key technology of microwave oscillator with low phase noise is solved. Then, the microwave oscillator circuit is designed based on the monolithic integrated phase-locked loop chip HMC704LP4E and the integrated VCO chip V940ME24-LF, and the miniaturization of the microwave oscillator is achieved. The PCB of the microwave oscillator is designed by using the Altuim Designer10.0 circuit design software. The test results show that the phase noise index of the oscillator is basically consistent with the theoretical calculation value and reaches the design target. The validity and feasibility of the design scheme are verified. It can meet the practical engineering application. Finally, by analyzing the index of PXI module microwave oscillator, the mixed frequency locked frequency synthesizer is selected, and the PXI bus interface and microwave oscillator are designed. At the same time, the circuit design process and the output phase noise index of microwave oscillator with different N frequency division ratio are introduced in detail. Through comparison, the optimum parameters of the mixed-frequency phase-locked circuit are obtained. The requirement of low phase noise index of microwave oscillator is realized. On this basis, the software configuration of PXI bus and the configuration parameters of phase-locked chip are introduced. The PCBs of PXI module microwave oscillator are designed by using Altuim Designer10.0 circuit design software, and the test results show that the phase noise index of the oscillator is basically consistent with the theoretical calculation value and reaches the design target. It can satisfy the application of PXI bus automatic test system.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN752

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