宽带多模天线设计研究
发布时间：2018-12-27 18:34
【摘要】：随着通信领域不断发展,对天线的性能要求也越来越高。拓展天线带宽的方法很多,但是大多数都有其局限性,或者不能够明确从物理上洞察天线的辐射原理。本文将对基于模式分析的宽带天线设计方法进行阐述和讨论,并基于此完成了几款宽带天线设计。文中基于经典特征模理论对天线端口特性进行了研究,并将串并联谐振和模式谐振的关系作了分析。并联谐振就是多个模式相互作用发生的谐振现象。而串联谐振就是单个模式谐振的结果。这些论述通过分析偶极子和探针激励的微带天线得到印证。在天线设计部分分别对三种天线进行了分析、设计和实验验证。分别是四端口车载天线,层叠形式的微带双极化天线和交叉偶极子形式的双极化天线设计。分别从模式谐振频率,特征电流,特征场和端口特性分析了天线结构及其谐振特性。对天线的辐射机理和设计思路进行了相对清晰的物理意义描述,并收到了较为理想的性能效果。总之,本文通过对特征模理论和天线端口谐振特性的研究,将特征模理论和天线设计进一步结合了起来。通过分析设计出了一款四端口天线和两款宽带双极化天线。结果证明通过特征模理论,宽带天线设计可以有效的通过多模天线的理论进行分析。与传统的方法不同,这种模式分解理论为金属天线设计提供了通用的有效方法和途径。
[Abstract]:With the development of communication field, the performance of antenna is becoming more and more important. There are many ways to expand antenna bandwidth, but most of them have their limitations, or can not clearly understand the radiation principle of antenna. In this paper, the design method of broadband antenna based on mode analysis is described and discussed, and several broadband antennas are designed based on it. In this paper, the characteristic of antenna port is studied based on the classical eigenmode theory, and the relationship between series-parallel resonance and mode resonance is analyzed. Parallel resonance is the resonant phenomenon of multiple modes interaction. Series resonance is the result of single mode resonance. These discussions are confirmed by the analysis of microstrip antennas excited by dipoles and probes. In the part of antenna design, three kinds of antennas are analyzed, designed and verified by experiments. It is a four-port antenna, a stacked microstrip dual-polarization antenna and a cross-dipole dual-polarized antenna. The antenna structure and resonance characteristics are analyzed from the mode resonant frequency, characteristic current, characteristic field and port characteristics, respectively. The radiation mechanism and design idea of the antenna are described in a relatively clear physical sense, and an ideal performance effect is obtained. In a word, the characteristic mode theory and antenna design are further combined by studying the characteristic mode theory and the resonant characteristics of antenna port. A four-port antenna and two broadband dual-polarization antennas are designed. The results show that the design of wideband antenna can be effectively analyzed by the theory of multimode antenna. Different from the traditional method, the theory of mode decomposition provides a general and effective method for the design of metal antenna.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822
本文编号：2393446
[Abstract]:With the development of communication field, the performance of antenna is becoming more and more important. There are many ways to expand antenna bandwidth, but most of them have their limitations, or can not clearly understand the radiation principle of antenna. In this paper, the design method of broadband antenna based on mode analysis is described and discussed, and several broadband antennas are designed based on it. In this paper, the characteristic of antenna port is studied based on the classical eigenmode theory, and the relationship between series-parallel resonance and mode resonance is analyzed. Parallel resonance is the resonant phenomenon of multiple modes interaction. Series resonance is the result of single mode resonance. These discussions are confirmed by the analysis of microstrip antennas excited by dipoles and probes. In the part of antenna design, three kinds of antennas are analyzed, designed and verified by experiments. It is a four-port antenna, a stacked microstrip dual-polarization antenna and a cross-dipole dual-polarized antenna. The antenna structure and resonance characteristics are analyzed from the mode resonant frequency, characteristic current, characteristic field and port characteristics, respectively. The radiation mechanism and design idea of the antenna are described in a relatively clear physical sense, and an ideal performance effect is obtained. In a word, the characteristic mode theory and antenna design are further combined by studying the characteristic mode theory and the resonant characteristics of antenna port. A four-port antenna and two broadband dual-polarization antennas are designed. The results show that the design of wideband antenna can be effectively analyzed by the theory of multimode antenna. Different from the traditional method, the theory of mode decomposition provides a general and effective method for the design of metal antenna.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822
【参考文献】
相关博士学位论文 前1条
1 崔悦慧;新型宽带平面基站天线研究[D];华南理工大学;2014年
，本文编号：2393446
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