面向无线通信系统的分形微带贴片天线的设计与分析

发布时间：2022-02-17 22:14

　　无线通信技术的发展已经对包括天线在内的集成器件提出了要求。天线是低剖面集成无线通信系统的重要组成部分。特别是片上天线,因为需要体积小的天线来完成现代手持无线通信设备的优化设计,是天线研究的一个重要领域。多频段运行和更宽的工作带宽是这些无线设备的另一要求。实现这些特性的解决方案之一是引入分形几何。分形几何具有固有的自相似性或自仿射性,用来描述和模拟自然界中的各种形状,如山脉、波浪等。这一特性有助于研究人员和天线设计者挖掘出一些适合设计小天线的新几何图形。将分形几何引入微带天线是一个新兴的研究领域,需要对其进行评估以获得最佳的天线响应。分形几何天线的使用倾向于小型化、扩大工作带宽、产生多频带响应等方面。虽然近年来微带贴片天线在尺寸缩小、多频带响应和带宽增强等方面已提出不少技术并应用于通信和雷达系统,但是为满足紧凑、高效和低成本天线的挑战,仍有很大的进一步研究的空间。本文提出了两种新的分形贴片天线设计方案。第一个方案,我们基于科赫和闵可夫斯基的组合（K-M）分形几何设计了一种新型混合分形天线。运行在1.8 GHz的微带贴片天线（MPA）结合了新颖的K-M混合分形几何,这导致工作频率降至1.4... 

【文章来源】：重庆大学重庆市211工程院校985工程院校教育部直属院校

【文章页数】：99 页

【学位级别】：博士

【文章目录】：
中文摘要
ABSTRACT
GLOSSARY
1 INTRODUCTION
    1.1 Literature Review
    1.2 Motivation
    1.3 Problem Statement
    1.4 Research Methodology
    1.5 Thesis Organization and Contribution
2 ANTENNA THEORY
    2.1 Introduction to Antennas
    2.2 Brief Overview
    2.3 Antenna background
    2.4 Antenna Parameters
    2.5 Microstrip Antennas
    2.6 Introduction of Microstrip Patch Antenna (MPA)
    2.7 Basic principles of MPA Operation
    2.8 Types of Microstrip Patch Antennas
    2.9 Feeding techniques of Microstrip Patch Antenna
        2.9.1 Coaxial Probe Feed
        2.9.2 Microstrip line feed
        2.9.3 Aperture coupled feed
        2.9.4 Proximity Coupled Feed
        2.9.5 Comparison of feeding techniques
    2.10 Radiation fields
    2.11 Advantages and Disadvantages
    2.12 Summary
3 FRACTAL ANTENNAS
    3.1 Introduction
    3.2 Fractals
    3.3 Fractal Antenna
    3.4 Iterated Function Systems
    3.5 Fractal Geometries
        3.5.1 Sierpinski Gasket
        3.5.2 Koch Curve
        3.5.3 Minkowski Curve
        3.5.4 Cohen- Minkowski Geometry
    3.6 Summary
4 PROPOSED NOVEL MINIATURIZED KOCH-MINKOWSKI HYBRID FRACTAL ANTENNA
    4.1 Proposal of K-M Hybrid geometry
    4.2 Antenna Design for GSM Application
        4.2.1 Design of MPA for GSM Application
    4.3 Design of Novel Fractal Antenna
        4.3.1 Hybrid Fractal Geometry
        4.3.2 K-M Hybrid Fractal Patch Antenna Design
    4.4 Comparison of Proposed Hybrid Fractal Geometry with Koch geometry
    4.5 Fabrication of the Antenna
    4.6 Testing Results
        4.6.1 Vector Network Analyzer (VNA) Testing
        4.6.2 Anechoic Chamber Testing
    4.7 Summary
5 PROPOSED NOVEL STAIR SHAPED FRACTAL ANTENNA FOR MULTIBAND OPERATIONS
    5.1 Proposal of Stair Shaped Fractal geometry
    5.2 MPA Design
    5.3 Design of Novel Fractal Antenna
        5.3.1 Stair Shaped Fractal Geometry
        5.3.2 Stair Shaped Fractal Antenna Design
    5.4 Fabrication of the Antenna
    5.5 Testing Results
        5.5.1 Vector Network Analyzer (VNA) Testing
        5.5.2 Anechoic Chamber Testing
    5.6 Summary
6 CONCLUSION AND FUTUREWORK
ACKNOWLEDGEMENT
REFERENCES
Appendix
    A. Publication during the study for the degree



本文编号：3630196