微带贴片天线去耦结构设计技术研究
发布时间：2018-07-16 22:06
【摘要】：相邻天线之间的耦合与去耦合是天线设计研究的一个重要课题,天线相互之间的耦合常常会对无线通信系统的性能产生意想不到的影响。通常互耦会降低天线的收发隔离度从而增加无线通信系统接收机设计的难度,因此对相邻天线去耦合的研究具有重要的实际应用价值。本文通过原理分析和仿真计算对相邻微带贴片天线的去耦合结构的设计进行了深入研究,论文的主要工作和贡献如下:(1)设计了多种场对消共面型去耦结构,目的是为了解决紧密放置贴片天线间耦合问题。这种场对消去耦结构是在天线间增加了一种间接耦合场使它与原有的直接耦合场相抵消,从而可以达到抑制互耦的目的。本文以微带贴片天线去耦结构为例。HFSS仿真结果可以看出在微带天线紧密放置时,它们的隔离度在-10dB带宽(100MHz)下最低可以达到25dB,在50MHz内时此结构的隔离度最低可以达到30dB。设计了一种基于缺陷地结构的间接去耦结构,它是基于电磁带隙结构发展而来的一种结构,这种去耦结构均能够在微带天线间的耦合路径上进行滤波来达到抑制耦合的目的,仿真结果表明该结构在-10dB匹配带宽(150MHz)内隔离度最低可以达到17.5dB。(2)设计了多种异面型去耦结构,比如含金属墙开路槽结构,此结构不但可以利用场对消还可以利用中间的电路板来降低部分耦合来提高微带天线间隔离度,仿真结果表明该结构隔离度最低能够达到21dB。还有金属条带型去耦结构,尤其T型对称金属条带去耦结构仿真结果表明在-10dB匹配带宽(80MHz)内隔离度最低可以达到41.5dB。
[Abstract]:The coupling and decoupling between adjacent antennas is an important research topic in antenna design. The coupling between antennas often has an unexpected impact on the performance of wireless communication systems. Mutual coupling usually reduces the isolation of antennas and increases the difficulty of receiver design in wireless communication systems. Therefore, the study of decoupling of adjacent antennas has important practical application value. In this paper, the design of decoupling structure of adjacent microstrip patch antenna is deeply studied through principle analysis and simulation calculation. The main work and contributions of this paper are as follows: (1) many field canceling coplanar decoupling structures are designed. The purpose of this paper is to solve the problem of coupling between tightly placed patch antennas. This decoupling structure adds an indirect coupling field between the antennas to counteract the original direct coupling field so that the mutual coupling can be suppressed. In this paper, we take the decoupling structure of microstrip patch antenna as an example. The results of HFSS simulation show that the isolation of microstrip antenna can reach 25 dB at -10 dB bandwidth (100 MHz) and 30 dB at 50 MHz. An indirect decoupling structure based on the defect ground structure is designed, which is based on the electromagnetic band gap structure. The decoupling structure can be filtered on the coupling path between the microstrip antennas to suppress the coupling. The simulation results show that the minimum isolation can reach 17.5 dB within -10dB matching bandwidth (150MHz). (2) A variety of off-plane decoupling structures are designed, such as metal-wall open-circuit groove structures. This structure not only can use field cancellation but also can reduce the partial coupling to improve the isolation degree of microstrip antenna. The simulation results show that the isolation degree of the structure can reach 21 dB. There are also metal strip decoupling structures, especially T symmetric metal strip decoupling structures. The simulation results show that the lowest isolation can reach 41.5 dB within -10dB matching bandwidth (80MHz).
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822
本文编号：2127813
[Abstract]:The coupling and decoupling between adjacent antennas is an important research topic in antenna design. The coupling between antennas often has an unexpected impact on the performance of wireless communication systems. Mutual coupling usually reduces the isolation of antennas and increases the difficulty of receiver design in wireless communication systems. Therefore, the study of decoupling of adjacent antennas has important practical application value. In this paper, the design of decoupling structure of adjacent microstrip patch antenna is deeply studied through principle analysis and simulation calculation. The main work and contributions of this paper are as follows: (1) many field canceling coplanar decoupling structures are designed. The purpose of this paper is to solve the problem of coupling between tightly placed patch antennas. This decoupling structure adds an indirect coupling field between the antennas to counteract the original direct coupling field so that the mutual coupling can be suppressed. In this paper, we take the decoupling structure of microstrip patch antenna as an example. The results of HFSS simulation show that the isolation of microstrip antenna can reach 25 dB at -10 dB bandwidth (100 MHz) and 30 dB at 50 MHz. An indirect decoupling structure based on the defect ground structure is designed, which is based on the electromagnetic band gap structure. The decoupling structure can be filtered on the coupling path between the microstrip antennas to suppress the coupling. The simulation results show that the minimum isolation can reach 17.5 dB within -10dB matching bandwidth (150MHz). (2) A variety of off-plane decoupling structures are designed, such as metal-wall open-circuit groove structures. This structure not only can use field cancellation but also can reduce the partial coupling to improve the isolation degree of microstrip antenna. The simulation results show that the isolation degree of the structure can reach 21 dB. There are also metal strip decoupling structures, especially T symmetric metal strip decoupling structures. The simulation results show that the lowest isolation can reach 41.5 dB within -10dB matching bandwidth (80MHz).
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822
【参考文献】
相关期刊论文 前1条
1 闫敦豹,付云起,张国华,高强,袁乃昌;EBG结构在微带天线阵中的应用[J];微波学报;2005年S1期
相关博士学位论文 前1条
1 齐宏业;天线互耦表征及去耦方法的研究[D];东南大学;2016年
相关硕士学位论文 前1条
1 饶佳人;阵列天线互耦特性研究[D];南京航空航天大学;2013年
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