摘要频率源的性能在很大程度上影响了很多电子设备和系统的指标。而数字锁相源是实现高性能指标频率源的一种重要方法。在这样的背景下,本课题对低相位噪声微波锁相源的设计理论和工程实践进行了研究。64579
本文采用锁相原理设计L波段频率合成器。首先对锁相环路的工作原理和基本组成部分进行了简单的介绍,然后介绍了噪声分析和所用器件。最后给出了鉴相器ADF4113,无源比例环路滤波器和压控振荡器构成的锁相频率合成器的方法和实验测试结果,实现了1.0~1.2GHz输出,优于-80dBc/Hz@1KHz的低相噪。
毕业论文关键字:锁相环,频率合成器,相位噪声,ADF4113
毕业设计说明书(论文)外文摘要
Title Design of L-Band Frequency Synthesizer
Abstract
High performance frequency synthesizer is absolutely necessarily technique that ensure modern electronic system to achieve high performance, and Phase-locked technique is one of important technique to realize high performance frequency synthesizer. Therefore, the subject is to study the design theory and engineering realization of the low phase-noise phase locked source in microwave band.
In this paper, a PLL frequency synthesizer working in L band and based on theory of phase lock was designed. At fist, the basic of phase lock loop and its constituent part are introduced, then noise analysis and devices which were used are introduced. Finally the method that use phase detector ADF4113,inactive loop filter and voltage controller oscillator and provided the experimental test result of this low phase noise PLL frequency synthesizer with output of 1.0GHz to 1.2GHz, and phase noise of -80dBc/Hz@1KHz.
Key Words: Ohase lock, Frequency synthesizer, Phase noise,ADF4113
目次
1 绪论 1
2 锁相环基本工作原理 2
2.1 锁相环路设计基础 2
2.1.1锁相环基本原理 2
2.1.2 环路工作状态 3
2.2 环路的组成 4
2.2.1 鉴相器 4
2.2.2 环路滤波器 6
2.2.3 压控振荡器 7
2.3 环路相位模型和基本方程 8
2.4 锁相环路的线性分析 9
2.5 锁相环频率合成器工作原理 10
2.6 频率合成器及其技术指标 12
3 锁相环的噪声分析 13
3.1 相位噪声模型 14
3.2 锁相环的噪声分析 15
3.3 噪声的计算 18
4 基于ADF4113的锁相环仿真电路设计与评估 19
4.1 主要性能及工作原理 20
4.2 引脚功能 21
4.3 编程控制 23
4.4 设计指标 24
4.5 电路设计与仿真分析 24
4.5.1 电路设计 24
4.5.2 电路仿真与分析 ADF4113的L波段频率综合器设计:http://www.youerw.com/tongxin/lunwen_71847.html