【作者】 陈英；

【导师】 唐明春；

【作者基本信息】 重庆大学 ， 工程硕士（电子与通信工程）（专业学位）， 2018， 硕士

【摘要】 现代无线通信系统中,滤波器与天线是射频前端电路的两个重要部分。滤波器主要功能是选择性通过特定频率范围内的信号,阻挡该频率范围外信号的通过,达到滤波的目的。天线主要承担了信号的发射与接收功能。在传统射频前端电路中两个器件分别独立设计,中间通过匹配网络连接。如果将滤波器与天线进行集成一体化设计,不仅有利于系统“小型化”设计,又能实现系统的“集成化”和“多功能”,由此滤波天线应运而生。本文基于已有的滤波天线将他们进行了三种划分:带阻型滤波天线、带通型滤波天线、结构级联型滤波天线。运用近场耦合技术在上述第三种结构级联型滤波天线做出了进一步提升,完成了电小滤波天线设计、紧凑型三阶滤波天线设计工作。创新性提出了第四类滤波天线,实现了宽带拓展、结构独立可调的滤波天线设计。本文主要内容如下:首先,对滤波天线国内外研究现状进行归纳和总结,并将已有的滤波天线进行了三种划分:带阻型滤波天线、带通型滤波天线、结构级联型滤波天线。详述三类滤波天线的研究背景与最新研究动态,分析三种滤波天线的性能。对滤波器和天线基本理论进行系统性阐述。其次,基于上述第三种结构级联型滤波天线做出进一步提升,完成了小型化滤波天线以及紧凑型三阶滤波天线的设计工作。两款基于近场耦合技术设计的滤波天线均是电小滤波天线且展现了良好的带外抑制性能,测试与仿真结果吻合。该设计创新性提出在不改变天线原有尺寸的前提下,采用嵌套的排列方式实现多阶滤波天线设计的理念并且所设计的两款滤波天线均为当时首次报道的电小滤波天线。再次,基于上述三类滤波天线提出了第四类滤波天线。第四类滤波天线与前面所设计的两款滤波天线一样采用了近场耦合技术,同前三类滤波天线一样具有良好的带外抑制特性,但区别于前两类滤波天线之处在于:第四类滤波天线不仅不会减少原有天线的带宽,还能拓展其阻抗带宽;而相比于第三类滤波天线,第四类滤波天线结构独立可调,这一性能将进一步有利于滤波天线的小型化设计。最后,对本论文的研究工作进行总结,并对本领域的进一步研究发展做出展望。更多还原

【Abstract】 In modern wireless communication systems,filter and antenna are two crucial parts of RF front-end circuits.The characteristic performance of filter is to selectively allowing signals in the specific frequency band passing through and blocking the passage of signals out of the specific frequency band to achieve the function of filtering.Antenna assumes the responsibility of transmission and reception of signals.In the traditional RF front-end circuit,the two crucial devices are designed independently and connected each other with impedance matching network.Filtenna as an integrated design combining filtering and radiation character into one device will not only beneficial to the "miniaturization" of the system,but also realize the "integration" and "multifunction" of the system.In this thesis,the reported filtennas can be classified into three main categories: band-stop filtenna,band-pass filtenna,and multi-resonator-cascaded filtenna.A further improvement working based on the third category multi-resonator-cascaded filtenna has been made with the near-field parasitic technique,completing a design of an electrically small filtenna(ESF)and a compact third-pole filtenna.Introducing the fourth category of filtenna innovatively,which broaden bandwidth of the original antenna and maintain the filtering characteristic whatever adjusting the filtering structure independently.The main contents of this thesis are as follows:Firstly,we generalize and summarize the current research status of the filtenna in and out of the abroad,classified the reported filtenna into three main categories: band-stop filtenna,band-pass filtenna and multi-resonator-cascaded filtenna.Expound the research background and the latest research trends of the three main categories filtenna in detail,analysis the performance of the three main categories filtenna.Elaborate the basic theory of filter and antenna systematically.Secondly,based on the third category multi-resonator-cascaded filtenna develop a further enhanced work,completed an electrically small filtenna and a compact three-pole filtenna design.Both filtennas based on the near-filed parasitic resonant technology are electrically small and exhibit excellent out-of-band rejection performance.The measurement results agree well with the simulation one.The novelty of the proposed filtenna is introducing a design method of filtenna with multi-order resonant while maintaining its original size utilizing the parallel structure arrangement.The proposed two filtenna were firstly reported electrically small filtenna when they are published.Then,the fourth category filtenna is put forward based on the above three categories filtenna.The fourth category filtenna utilizing the near-filed resonant parasitic technology,also exhibiting the good out-of-band rejection characteristic as the three categories of filtenna,but the difference comparing with the first and second category filtenna is that the fourth filtenna not only doesn’t reduce the bandwidth of the original antenna but also extend the impedance bandwidth.Compared with the third filtenna,the fourth category filtenna has an independent adjustable structure.This performance will further facilitate the miniaturization of the filtenna.Finally,summarize the research work of this thesis and look forward to the future research work in this field.更多还原