自校准YTO锁相环路的实现  

Implementation of the Self-calibration YTO PLL

作　　者：万耿华[1] 凌云志[1] 

机构地区：[1]中国电子科技集团公司第四十一研究所,蚌埠233006

出　　处：《微波学报》2011年第3期75-78,共4页Journal of Microwaves

基　　金：国家科技重大专项(2011ZX03001-003-01)

摘　　要：为了实现高载波通信,宽带YTO(YIG Tuning Oscillator)微波合成本振已成为方案设计的主要途径。由于YTO自身的磁滞、非线性特性等因素的影响,常规的手动校准预置容易使环路在捕捉的过程中失锁。基于单锁相环路的原理和YIG振荡器的可调谐特性,设计了一种能够自动校准的YTO单锁相环路,避免了因YTO磁滞特性和非线性特性造成的环路失锁,并且缩短了环路捕捉时间;另外,反馈环路中混频环节的引入,减少了环路相位噪声的恶化量。最终测量的校准曲线分析可以表明,在YTO环路的设计中引入自校准功能具有很大的必要性。To implement the high carrier communication,wideband microwave synthesis of the local oscillator has become the main way of design.Due to the influence of the YTO（YIG Tuning Oscillator） hysteresis characteristics and non-linear characteristics,the normal manual calibration may cause the PLL unlock at the process of capturing.Based on the basic principles of single phase-locked loop and the YIG oscillator tunable characteristics,a self-calibration YTO single PLL（phase-locked loop） has been designed,it can not only avoid loop unlock caused by YTO hysteresis characteristics and non-linear characteristics,but also decreases the loop capture time;In addition,the introduction of the feedback loop in the mixer part reduces the amount of loop phase noise deterioration.Analysis for the final measurement of calibration curve shows that the self-calibration function is very necessarily in the YTO PLL design.

关 键 词：锁相环路 YIG调谐振荡器 自校准 相位噪声 

分 类 号：TN911.8[电子电信—通信与信息系统]