【作者】 何俊；

【导师】 王秉中；

【作者基本信息】 电子科技大学 ， 无线电物理， 2009， 博士

【摘要】 近年来，相控阵雷达越来越广泛地用于各种飞行器，这就对它的体积、重量提出了新的要求，因此，相控阵馈电网络的小型化是发展趋势之一。另外，现代电子战中辐射与反辐射、干扰与反干扰技术越来越先进，作战环境越来越恶劣。因此，要求相控阵雷达具有抗干扰和生存能力。对应到馈电网络则要求其具有宽频带、双波段、谐波抑制等功能。因此，共形、小型化、宽带、双波段、谐波抑制等成为了馈电网络的研究方向。本文主要从小型化、宽带、双波段、谐波抑制等几个方面研究了相控阵馈电网络中的无源器件。在第一章，介绍了相控阵馈电网络的研究背景和最新进展；在第二章，首先总结了各种小型化技术；接着分析了周期慢波结构，研究不同单元数的影响；最后设计了一种新颖的周期慢波结构小型化功分器，研究了电容加载小型化功分器，其中电容加载小型化功分器结构简单，设计方便，并且具有谐波抑制功能。在第三章，首先建立了Schiffman移相器数值模型和用于构建知识人工神经网络的粗糙模型；接着建立了精确的基于传输线的混合左右手传输线模型；最后给出了三类基于传输线的混合左右手传输线差分移相器，并实际加工、测试了一个第三类移相器。在第四章，首先设计了一个双波段分支线耦合器；接着研究了慢波结构分支线耦合器；最后设计了新颖的具有谐波抑制功能的小型化共享电容分支线耦合器和鼠笼耦合器，与传统的小型化耦合器相比，它具有结构简单，设计简便的特点。在第五章，分别优化设计了传统和宽带的微带Butler阵。其中宽带的微带Butler阵采用了耦合微带线实现宽带移相。与传统的宽带Butler阵相比，它具有结构简单，带宽更宽的优点。在第六章，对本论文进行了总结，并提出了进一步的研究课题。更多还原

【Abstract】 Recently,phased array radars are frequently used in various flight applications.Thesizes and weights of the phased arrays need to satisfy some rigorous demands.Sominiaturization of feed network of the phased array is one of the research trends.Besides,the technologies of radiation and anti-radiation,disturbance andanti-disturbance develop rapidly in modem electrical wars.And the environments of thewars become worse.So the phased array should have the abilities in anti-disturbanceand survival.And conformation,miniaturization,wide band,dual band and harmonicsuppression are the research trends of feed network.In this dissertation,miniaturized,wide-band,dual-band,harmonic-suppression passive components of phased array feednetwork are researched.In Chapter 1,the research background and recent developments about phased arrayfeed network are reviewed.In Chapter 2,firstly,various miniaturization techniques are summarized.Secondly,periodic slow-wave structures are analyzed,and the influences of different number ofunit cells are researched.Lastly,compact power dividers with a novel periodicslow-wave structures and capacitor loading are researched.The proposed power dividerwith capacitor loading is simple and can be easily designed.Further more,it has goodharmonic suppression performance.In Chapter 3,firstly,a numerical model of Schiffrnan phase shifter and a coarsemodel used in constructing a knowledge based neural network are established.Secondly,an accurate model of transmission line based composite right/left handed transmissionline is established.Lastly,three types of differential phase shifters using compositeright/left handed transmission line are presented,and a third type phase shifter isfabricated and measured.In Chapter 4,firstly,a dual band branch line coupler is designed.Secondly,slow-wave structure branch line couplers are researched.Lastly,novel compact branchline coupler and rat-race coupler with shared capacitor loading are designed,and the couplers can suppress harmonics.As compared with the conventional compact coupler,the proposed couplers are simple and can be easily designed.In Chapter 5,a conventional and a wide-band microstrip Butler matrix aredesigned.The wide-band Butler matrix uses a coupled microstrip to implement thewide-band differential phase shift.As compared with the conventional wide-band Butlermatrix,the proposed wide-band Butler matrix is simple and the bandwidth is wider.In Chapter 6,a summary of the whole dissertation is given,and future researchtopics are suggested.更多还原