本文選題：頻率合成技術　切入點：微波振蕩器　出處：《中北大學》2015年碩士論文

【摘要】：為滿足微波毫米波測試儀器及系統(tǒng)需求，，順應儀器小型化和模塊化發(fā)展趨勢，特別針對Ku和Ka波段上下變頻裝置和PXI總線微波毫米波測試儀器及系統(tǒng)需求，設計了小型化低相位噪聲微波振蕩器和PXI模塊低相位噪聲微波振蕩器。 首先，闡述了微波振蕩器的設計技術及方案，比較了各方案的優(yōu)缺點。通過對Ku和Ka波段上下變頻裝置中微波振蕩器指標分析，選擇了單環(huán)鎖項式頻率合成技術方案。 其次，基于鎖相環(huán)相位噪聲計算方法，計算了不同鑒相頻率、鑒相器靈敏度、環(huán)路帶寬鎖相環(huán)的相位噪聲，分析了鎖相環(huán)相位噪聲最主要的影響因素，得出了微波振蕩器實現(xiàn)低相位噪聲的電路參數(shù)和鎖相芯片的配置參數(shù)，解決了微波振蕩器低相位噪聲的關鍵技術。 然后，基于單片集成鎖相環(huán)芯片HMC704LP4E和集成VCO芯片V940ME24-LF設計了微波振蕩器電路，較好的實現(xiàn)了微波振蕩器的小型化。利用Altuim Designer10.0電路設計軟件微波振蕩器的PCB進行了設計，利用中電四十一所測試設備測試了實物的指標。測試結果表明，振蕩器的相位噪聲指標與理論計算值基本一致，且達到設計指標。驗證了設計方案的有效性和可行性，可滿足實際的工程應用。 最后，通過對PXI模塊微波振蕩器指標分析，選擇了混頻鎖相式頻率合成技術方案，設計了PXI總線接口和微波振蕩器，同時詳細介紹了電路設計過程和計算了不同N分頻比微波振蕩器輸出相位噪聲指標，通過比較得出了混頻鎖相電路的最佳參數(shù)設置，實現(xiàn)了微波振蕩器的低相位噪聲指標的要求。在此基礎上，介紹了PXI總線的軟件配置和鎖相芯片的配置參數(shù)，最后，利用Altuim Designer10.0電路設計軟件設計了PXI模塊微波振蕩器的PCB，并對實物進行了測試。測試結果表明，振蕩器的相位噪聲指標與理論計算值基本一致，且達到設計指標，可滿足PXI總線自動測試系統(tǒng)的應用。
[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.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN752

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