基于高Q空氣諧振腔Ku波段點頻源研制
發(fā)布時間：2019-03-08 07:54
【摘要】：微波頻率源是雷達、無線通信等電子系統(tǒng)中的關鍵部件。隨著電子技術的不斷進步和發(fā)展,電子系統(tǒng)對于微波頻率源的指標要求也越來越高,尤其是相位噪聲指標。無論用何種頻率合成技術研制的微波頻率源,其相位噪聲指標與其參考基準源的相位噪聲密切相關,所以研制低相位噪聲點頻源具有重要的意義。本文以研制低相位噪聲點頻源為主要目的,進行了以下幾個方面的工作:1.首先詳細闡述了振蕩器的起振條件和振蕩平衡條件,然后介紹了相位噪聲的基本概念和相位噪聲的Leeson模型,以及振蕩器相位噪聲的Leeson模型表達式,并在此基礎上給出了改善振蕩器相位噪聲的幾點建議。2.介紹了直接反饋點頻源、穩(wěn)定本地點頻源、改進的直接反饋點頻源、改進的穩(wěn)定本地點頻源和采用干涉信號處理技術的點頻源等常見低相位噪聲點頻源的基本原理,以及這幾種點頻源的優(yōu)缺點;然后在此基礎上介紹了基于高Q空氣諧振腔Ku波段點頻源的方案,以及該方案中鎖頻環(huán)技術的基本原理。3.基于圓柱空氣諧振器的基本理論,仿真并設計了工作在023TE模式,諧振頻率為12.8GHz,輸入口臨界耦合、輸出口弱耦合的耦合可調(diào)諧振頻率可調(diào)高Q圓柱空氣諧振腔。4.依照基于高Q空氣諧振腔Ku波段點頻源方案,完成了本課題的點頻源總體方案設計;然后對點頻源的所有組成器件包括壓控振蕩器、功率放大器、定向耦合器、3dB電橋、低噪聲放大器、環(huán)路濾波器、加法器等分別進行了設計和仿真。5.完成了對點頻源的所有組成器件的調(diào)試和測試,使它們都滿足點頻源的設計要求;然后對點頻源系統(tǒng)進行了搭建、調(diào)試、測試,完成了基于高Q空氣諧振腔Ku波段點頻源的研制。經(jīng)測試,該點頻源的輸出信號頻率為12.66188GHz,功率為+9d Bm,相位噪聲性能為-64.44dBc/Hz@1kHz、-93.50dBc/Hz@10kHz、-97.10dBc/Hz@100kHz、-126.33dBc/Hz@1MHz。
[Abstract]:Microwave frequency source is the key component in the electronic system such as radar, wireless communication and so on. With the continuous progress and development of electronic technology, the requirement of microwave frequency source in electronic system is higher and higher, especially the phase noise index. No matter which frequency synthesizer is used, the phase noise index of microwave frequency source is closely related to the phase noise of its reference source. Therefore, it is of great significance to develop a low phase noise point frequency source. The main purpose of this paper is to develop a low phase noise point frequency source, and the following works have been carried out: 1. The starting condition and balance condition of oscillator are described in detail. Then the basic concept of phase noise, the Leeson model of phase noise and the expression of Leeson model of phase noise of oscillator are introduced. On this basis, some suggestions for improving the phase noise of oscillator are given. 2. This paper introduces the basic principles of common low phase noise point frequency sources such as direct feedback point frequency source, stabilized local site frequency source, improved direct feedback point frequency source, improved local site frequency source and point frequency source using interference signal processing technology, etc. And the advantages and disadvantages of these point frequency sources; Then, the scheme based on the high Q air resonant cavity Ku band point frequency source is introduced, and the basic principle of frequency locking loop technology in this scheme is introduced. 3. Based on the basic theory of cylindrical air resonator, a cylindrical air resonator working in 023TE mode is simulated and designed. The resonant frequency is 12.8GHz, the critical coupling of input and outlet is critical, and the coupling adjustable resonant frequency of output and outlet is adjustable to high Q cylindrical air resonator. According to the point frequency source scheme based on the high Q air resonant cavity Ku region, the overall design of the point frequency source is completed. Then all the components of the point frequency source, including voltage controlled oscillator, power amplifier, directional coupler, 3dB bridge, low noise amplifier, loop filter, adder and so on, are designed and simulated. 5. The debugging and testing of all the components of the point frequency source are completed to make them meet the requirements of the design of the point frequency source. Then the point frequency source system is built, debugged and tested, and the development of the point frequency source based on the high Q air resonant cavity Ku region is completed. The output frequency of the point frequency source is 12.66188GHz, and the phase noise performance of 9d Bm, is-64.44dBC / Hz / 1kHz, 93.50dBC / Hz / 10kHz, 97.10dBC / Hz / 100kHz, 126.33dBC / Hz / 1MHz, 126.33dBC / Hz / 1MHz, 10kHz, 126.33dBC / Hz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBC / Hz, 10kHz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBcxHz.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN74
本文編號：2436592
[Abstract]:Microwave frequency source is the key component in the electronic system such as radar, wireless communication and so on. With the continuous progress and development of electronic technology, the requirement of microwave frequency source in electronic system is higher and higher, especially the phase noise index. No matter which frequency synthesizer is used, the phase noise index of microwave frequency source is closely related to the phase noise of its reference source. Therefore, it is of great significance to develop a low phase noise point frequency source. The main purpose of this paper is to develop a low phase noise point frequency source, and the following works have been carried out: 1. The starting condition and balance condition of oscillator are described in detail. Then the basic concept of phase noise, the Leeson model of phase noise and the expression of Leeson model of phase noise of oscillator are introduced. On this basis, some suggestions for improving the phase noise of oscillator are given. 2. This paper introduces the basic principles of common low phase noise point frequency sources such as direct feedback point frequency source, stabilized local site frequency source, improved direct feedback point frequency source, improved local site frequency source and point frequency source using interference signal processing technology, etc. And the advantages and disadvantages of these point frequency sources; Then, the scheme based on the high Q air resonant cavity Ku band point frequency source is introduced, and the basic principle of frequency locking loop technology in this scheme is introduced. 3. Based on the basic theory of cylindrical air resonator, a cylindrical air resonator working in 023TE mode is simulated and designed. The resonant frequency is 12.8GHz, the critical coupling of input and outlet is critical, and the coupling adjustable resonant frequency of output and outlet is adjustable to high Q cylindrical air resonator. According to the point frequency source scheme based on the high Q air resonant cavity Ku region, the overall design of the point frequency source is completed. Then all the components of the point frequency source, including voltage controlled oscillator, power amplifier, directional coupler, 3dB bridge, low noise amplifier, loop filter, adder and so on, are designed and simulated. 5. The debugging and testing of all the components of the point frequency source are completed to make them meet the requirements of the design of the point frequency source. Then the point frequency source system is built, debugged and tested, and the development of the point frequency source based on the high Q air resonant cavity Ku region is completed. The output frequency of the point frequency source is 12.66188GHz, and the phase noise performance of 9d Bm, is-64.44dBC / Hz / 1kHz, 93.50dBC / Hz / 10kHz, 97.10dBC / Hz / 100kHz, 126.33dBC / Hz / 1MHz, 126.33dBC / Hz / 1MHz, 10kHz, 126.33dBC / Hz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBC / Hz, 10kHz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBcxHz.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN74
【參考文獻】
相關碩士學位論文 前2條
1 伍昆倫;高性能點頻微波振蕩器關鍵技術研究[D];電子科技大學;2012年
2 駱明偉;低相噪鎖相介質(zhì)振蕩器的研制[D];電子科技大學;2007年
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