Ka波段低相噪锁相倍频源

发布时间：2019-02-18 12:25

【摘要】：本文研究了Ka波段锁相跳频源,对锁相原理和锁相源相位噪声的形成原因进行了分析,并阐述了如何改进相位噪声,对跳频锁相源的稳定性原因进行了探讨,以此为依据研制了毫米波频率源。第一章共分为五部分,前四部分分别介绍了毫米波的特点、毫米波频率合成器的功能、锁相技术的发展背景、国内外频率源的发展现状,然后在第五部分提出了本文的研究目标。第二章主要介绍了锁相环的基本理论,共分为四部分。第一部分对锁相环的三大主要部件,即:鉴相器、环路滤波器、压控振荡器分别进行了介绍,还对环路的基本方程进行分析;第二部分介绍了环路滤波器的传递函数,对影响环路稳定性因素、环路捕获性能和锁相环的相位噪声进行了分析;第三部分对数字锁相环的工作机理进行了介绍;第四部分对本章进行了小结。第三章主要介绍了倍频器的基本理论,共分为六部分。前五部分分别介绍了倍频器的用途、倍频原理、倍频器的分类、有源倍频器的基本原理、倍频器的主要性能指标,第六部分对本章进行了小结。第四章主要介绍了Ka波段低相噪锁相倍频源的设计过程,共分为八部分。第一部分介绍了本课题要达到的技术指标;第二部分介绍了各种可实现本课题的方案,然后从中选取合适的设计方案;第三部分在已选取方案的基础上,介绍了主要元器件的选取;第四部分在第二部分和第三部分的基础上,对本课题所能达到的技术指标进行了分析;第五部分在第二部分~第四部分的基础上,对锁相倍频源电路进行设计;第六部分主要介绍了锁相倍频源所采取的电磁兼容设计;第七部分主要介绍了锁相倍频源的工艺设计;第八部分对本章进行了小结。第五章主要介绍了Ka波段低相噪锁相倍频源的电路装配、产品调试、产品测试及对测试结果进行了分析,最后对本章进行了小结。第六章主要是对全文进行总结及后续工作展望。本课题在锁相和倍频的基本原理的基础上,采用锁相方式得到Ku波段跳频信号,然后经过倍频,得到Ka波段信号。经过测试,产品输出频率为30~31GHz,相位噪声为-96.98dBc@10kHz,带内杂波抑制度为80dB,技术指标完全满足某重点工程的设计要求。
[Abstract]:In this paper, the phase-locked frequency-hopping source in Ka band is studied, and the principle of phase-locked source and the formation reason of phase-locked noise are analyzed, and how to improve the phase noise is expounded, and the stability reasons of phase-locked source of frequency-hopping are discussed. Based on this, a millimeter wave frequency source has been developed. Chapter one is divided into five parts. The first four parts introduce the characteristics of millimeter wave, the function of millimeter wave frequency synthesizer, the development background of phase-locked technology, the development status of frequency source at home and abroad. Then in the fifth part, the research goal of this paper is put forward. The second chapter mainly introduces the basic theory of PLL, which is divided into four parts. The first part introduces the three main components of PLL, that is, phase detector, loop filter and voltage-controlled oscillator, and analyzes the basic equations of the loop. In the second part, the transfer function of the loop filter is introduced, and the factors affecting the stability of the loop, the performance of the loop capture and the phase noise of the phase-locked loop are analyzed, and the working mechanism of the digital phase-locked loop is introduced in the third part. The fourth part carries on the summary to this chapter. The third chapter mainly introduces the basic theory of frequency multiplier, which is divided into six parts. The first five parts introduce the use of frequency multiplier, the principle of frequency doubling, the classification of frequency multiplier, the basic principle of active frequency multiplier, the main performance index of frequency multiplier. In the sixth part, this chapter is summarized. In chapter 4, the design process of low phase noise phase-locked frequency multiplier in Ka band is introduced, which is divided into eight parts. The first part introduces the technical index of this subject, the second part introduces the various schemes that can realize the subject, and then selects the appropriate design scheme. The third part introduces the selection of main components on the basis of the selected scheme, and the fourth part analyzes the technical index of the subject on the basis of the second part and the third part. In the fifth part, on the basis of the second to the fourth part, the circuit of the phase-locked frequency multiplier is designed, the sixth part mainly introduces the electromagnetic compatibility design of the phase-locked frequency-doubling source, the seventh part mainly introduces the process design of the phase-locked frequency-doubling source. The eighth part carries on the summary to this chapter. The fifth chapter mainly introduces the circuit assembly, product debugging, product test and test results of low phase noise phase-locked frequency multiplier in Ka band. Finally, this chapter is summarized. The sixth chapter is a summary of the full text and future work prospects. Based on the basic principle of phase-locked and frequency-doubling, the frequency hopping signal of Ku band is obtained by phase-locked mode, and then the signal of Ka band is obtained by frequency-doubling. The test results show that the output frequency of the product is 30 ~ 31GHz, the phase noise is -96.98dBc @ 10kHz, and the suppression degree of in-band clutter is 80dB. the technical specifications fully meet the design requirements of a key project.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.8

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