基于向列液晶的电调IMSL移相器和天线研究
发布时间：2021-01-30 06:41
可调谐器件是现代无线通信系统的重要组成部分。向列相液晶（NLC）作为一种新型调谐元件,其工作频段可达10 GHz以上且具有低损耗特性。本文旨在研究适用于微波天线结构的液晶NLC的电磁特性,液晶可调谐特性,液晶结构设计及其潜在应用,并设计一种基于向列相液晶的可调谐装置,使之能够与传统天线结构整合并实现移相效果。本论文由以下五部分组成。第一部分,通过液晶材料的理论分析,对液晶分子取向角的广义方程进行了推导,得到了方位角和液晶响应时间的微分方程解的数值方法。并采用有限差分方法进行分析,由此方向角获得了较传统方法更为精确的结果。第二部分,提出一种新型电倒置微带线移相器装置,通过交流控制向列相液晶分子取向角,实现了NLC分子排列顺序的改变。交流偏置电压从0 V增加到20V时,器件的相移变化为45°,插入损耗从0.56 dB改变为1.06 dB。同时,品质因数值达到76.15°/dB。第三部分,对于可调的单波束天线,提出了一种液晶可调的半模基片集成漏波天线（HMSIW-LWA）,并通过引入过渡结构,提高HMSIW-LWA输入功率辐射模式的效率。通过对新型基于NLC调谐介质特性的研究,有效的控制了液...
【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校
【文章页数】：127 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Nomenclature
Chapter 1 Introduction
1.1 The Research Background
1.2 Objective
1.3 Significance of the Research
1.4 Literature Review and Related Work
1.5 The Main Research Contents
Chapter 2 Novel IMSL Phase Shifter by Using NLC
2.1 Introduction
2.2 Fundamentals of LC
2.3 Electromagnetic Properties of LC
2.3.1 Dielectric Properties of LC
2.3.2 Magnetic Properties of LC
2.3.3 Benchmark Values of The Tunable Material
2.4 The Continuum Theories and Energy Formulations of LC
2.4.1 The Oseen-Frank Energy
2.4.2 The Theory of Response to The Electric and Magnetic Fields
2.4.3 The Extra-ordinary and Ordinary Waves of N-LC
2.4.4 Derivation of Generalized Orientation Angle θ Equation
2.4.5 Finite-Difference Method of Solution
2.4.6 Response Time for LC
2.5 A Novel IMSL Phase Shifter Based on LC
2.5.1 Preliminary Analysis of Phase Shifter
2.5.2 Design Considerations of IMSL Phase Shifter
2.6 Electric Biasing Concepts for IMSL Phase Shifter
2.7 Simulation Results for IMSL Phase Shifter
2.8 The Summary of the Chapter
Chapter 3 Tunable HMSIW-LWA
3.1 Introduction
3.2 Fundamentals of HMSIW Structure
3.3 The Electric Biasing Technique for HMSIW-LC Device
3.4 The Analysis of HMSIW Unit-Cell
3.4.1 Bloch Impedance
3.4.2 Impedance Matching
3.4.3 Radiating Element of HMSIW
3.4.4 The Equivalent Circuit
3.5 Tunable HMSIW-LWA Fed Rectangular Patch based on LC
3.6 Simulation Results for HMSIW-LWA
3.7 The Summary of the Chapter
Chapter 4 Novel Tunable Dual-Beam （?）-Shaped MLWA
4.1 Introduction
4.2 Analytical of the Radiation Pattern for Dual-Beam MLWA
4.3 The Electric Biasing Concepts for （?）-shaped MLWA
4.4 Analysis of （?）-shaped MLWA Unit-Cell
4.4.1 The Equivalent Circuit
4.4.2 Bloch Impedance
4.5 Tunable Dual-Beam for （?）-shaped MLWA based on LC
4.6 Simulation Results for MLWA
4.7 Measurement Results for MLWA
4.8 The Summary of the Chapter
Chapter 5 Tunable Frequency for （?）-Shaped Microstrip Patch Array
5.1 Introduction
5.2 Analysis of （?）-Shaped Patch Antenna
5.2.1 Transmission Line Model
5.2.2 Cavity Model
5.3 Single （?）-Shaped Patch Antenna
5.3.1 Equivalent circuit
5.3.2 Scattering Parameter
5.3.3 Radiation Pattern
5.4 Analysis of Antenna Array
5.5 Electric Biasing Concepts for （?）-shaped Patch Array
5.6 Tunable Frequency for （?）-Shaped Patch Array Based on LC
5.7 Simulation Results for Antenna Array
5.8 The Summary of the Chapter
Conclusions
Future Work
References
Papers published in the period of Ph D education
Acknowledgement
Curriculum Vitae
Appendix
本文编号：3008451
【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校
【文章页数】：127 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Nomenclature
Chapter 1 Introduction
1.1 The Research Background
1.2 Objective
1.3 Significance of the Research
1.4 Literature Review and Related Work
1.5 The Main Research Contents
Chapter 2 Novel IMSL Phase Shifter by Using NLC
2.1 Introduction
2.2 Fundamentals of LC
2.3 Electromagnetic Properties of LC
2.3.1 Dielectric Properties of LC
2.3.2 Magnetic Properties of LC
2.3.3 Benchmark Values of The Tunable Material
2.4 The Continuum Theories and Energy Formulations of LC
2.4.1 The Oseen-Frank Energy
2.4.2 The Theory of Response to The Electric and Magnetic Fields
2.4.3 The Extra-ordinary and Ordinary Waves of N-LC
2.4.4 Derivation of Generalized Orientation Angle θ Equation
2.4.5 Finite-Difference Method of Solution
2.4.6 Response Time for LC
2.5 A Novel IMSL Phase Shifter Based on LC
2.5.1 Preliminary Analysis of Phase Shifter
2.5.2 Design Considerations of IMSL Phase Shifter
2.6 Electric Biasing Concepts for IMSL Phase Shifter
2.7 Simulation Results for IMSL Phase Shifter
2.8 The Summary of the Chapter
Chapter 3 Tunable HMSIW-LWA
3.1 Introduction
3.2 Fundamentals of HMSIW Structure
3.3 The Electric Biasing Technique for HMSIW-LC Device
3.4 The Analysis of HMSIW Unit-Cell
3.4.1 Bloch Impedance
3.4.2 Impedance Matching
3.4.3 Radiating Element of HMSIW
3.4.4 The Equivalent Circuit
3.5 Tunable HMSIW-LWA Fed Rectangular Patch based on LC
3.6 Simulation Results for HMSIW-LWA
3.7 The Summary of the Chapter
Chapter 4 Novel Tunable Dual-Beam （?）-Shaped MLWA
4.1 Introduction
4.2 Analytical of the Radiation Pattern for Dual-Beam MLWA
4.3 The Electric Biasing Concepts for （?）-shaped MLWA
4.4 Analysis of （?）-shaped MLWA Unit-Cell
4.4.1 The Equivalent Circuit
4.4.2 Bloch Impedance
4.5 Tunable Dual-Beam for （?）-shaped MLWA based on LC
4.6 Simulation Results for MLWA
4.7 Measurement Results for MLWA
4.8 The Summary of the Chapter
Chapter 5 Tunable Frequency for （?）-Shaped Microstrip Patch Array
5.1 Introduction
5.2 Analysis of （?）-Shaped Patch Antenna
5.2.1 Transmission Line Model
5.2.2 Cavity Model
5.3 Single （?）-Shaped Patch Antenna
5.3.1 Equivalent circuit
5.3.2 Scattering Parameter
5.3.3 Radiation Pattern
5.4 Analysis of Antenna Array
5.5 Electric Biasing Concepts for （?）-shaped Patch Array
5.6 Tunable Frequency for （?）-Shaped Patch Array Based on LC
5.7 Simulation Results for Antenna Array
5.8 The Summary of the Chapter
Conclusions
Future Work
References
Papers published in the period of Ph D education
Acknowledgement
Curriculum Vitae
Appendix
本文编号：3008451
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