摘要本论文提出了寄生贴片型非周期人工磁导体结构，并将其作为探针馈电贴片天线的地板。在支节加载人工磁导体结构的基础上,通过改变AMC结构的尺寸、排布以及地板大小，研究其对AMC表面电流的幅度相位分布的影响，优化天线辐射口径场的幅度和相位的一致性，提高天线的辐射性能。结果表明，与支节加载的AMC结构相比，采用寄生贴片型AMC平面作为天线的地板，通过改变AMC结构的排布方式以及尺寸大小，可以使天线性能得到极大改善，尤其是口径效率。根据上述的分析结果，提出了两种基于AMC结构的高性能天线的设计方案,分别实现了超过90%的高口径效率和在10%的工作频带内口径效率均超过80%的的辐射性能。为了验证设计思路的有效性，我们采用PCB工艺对提出的两种天线结构进行了加工和测试。测量结果和仿真结果吻合较好。26063
关键词： 人工磁导体（AMC） 非周期 寄生贴片 高效率 表面电流密度
毕业论文设计说明书外文摘要
Title Investigation of non-periodic artificial magnetic conductor structure and its applications in high-performance microstrip patch antenna
Abstract
In this paper, a non-periodic artificial magnetic conductor structure based on parasitic patches is proposed, and employed as the ground plane of a probe-fed patch antenna. Based on stub-loaded artificial magnetic conductor, the dimension and arrangement of AMC structure as well as the size of the ground plane are investigated and discussed. Then the impact on the distribution of surface current density on the AMC plane are analyzed, to achieve the uniform radiation aperture field of the antenna for improving the radiation performance of the AMC-based antenna. Compared with the antenna using the stub-loaded AMC structure as the ground plane, the antenna using the proposed AMC plane can achieve better performance, especially the aperture efficiency. As a result, two antennas with high performance are proposed, which respectively can achieve very high efficiency of over 90% and stable efficiency of over 80% within the operated band. To validate the proposed design strategies, the proposed antennas are fabricated and measured. Good agreement can be observed between the simulated and measured results.
Keywords Artificial magnetic conductor (AMC), Non-periodic, Parasitic patches, high efficiency, surface current density
目 次
1 引言 1
1.1 研究背景 1
1.2国内外发展现状 1
1.3论文的主要内容 3
2 人工磁导体（AMC)结构特性分析 5
2.1 人工磁导体（AMC）结构介绍 5
2.2 反射相位计算模型 9
2.3 影响人工磁导体（AMC）结构反射相位因素的分析与讨论 10
2.5 本章小结 18
3基于非周期人工磁导体的高效率微带天线的研究 19
3.1 非周期人工磁导体（AMC）结构对微带天线性能的影响分析 19
3.2 高效率的非周期人工磁导体（AMC）微带天线的设计方案 23
3.3天线的加工测试与结果分析 31
3.4 本章小结 40
4 基于非周期人工磁导体的宽带高效率的紧凑型微带天线的研究 41
4.1 宽带高效率的非周期人工磁导体（AMC）微带天线的设计方案 41
4.1.1 结构设计 41
4.2 天线的加工测试与结果分析 45
4.3 本章小结 51
结论 52
致谢 53 非周期人工磁导体的特性研究及其在微带天线中的应用:http://www.751com.cn/cailiao/lunwen_20105.html