传输零点可控的矩形腔体多模带通滤波器的研究与设计

发布时间：2018-04-23 23:22

本文选题：矩形腔体 + 多模滤波器　；参考：《华南理工大学》2016年硕士论文

【摘要】：随着近年来通信行业的快速发展,尤其是2013年工信部正式向三大电信运营商发放4G牌照,对通信系统提出了更高的要求。滤波器作为通信系统中的一个不可缺少的关键器件,不仅对通信质量有着深刻影响,更对整个通信系统的体积、成本起到制约作用,所以研究滤波器对通信行业的发展具有十分重要的理论意义和潜在的经济价值。腔体滤波器是滤波器发展史上古老而又具有持久生命力的一种类型,凭借其高功率容量、低损耗、高Q值等优点,被广泛地应用于数字电视广播、卫星通信、基站等应用中,是现在通信系统中重要的组成部分之一。本文从矩形腔体滤波器入手,主要研究点和创新点在以下几个方面:(一)设计了一系列多模带通滤波器,该一系列滤波器的特点在于具有一对独立可控的传输零点,也即是说,这两个传输零点可以独立地任意放在通带的左侧或者右侧,提高了滤波器实用性。在设计过程中,解释了不同模式被激励的原因,对腔体滤波器的研究和拓展具有一定的指导和借鉴意义。(二)设计了一系列的多频带滤波器,有双频的,有三频的。设计的多频带滤波器的特点在于结构简单,性能良好。如果应用在通信系统中,可以减小通信系统的体积。(三)结合上面设计的多模带通滤波器和多频带滤波器,设计了U型槽线下的一款多模带通滤波器和一款三频带通滤波器,进一步验证了前面的设计理论和分析过程。(四)指出了后续研究方向的可行性,为进一步深入研究矩形腔体滤波器、拓展滤波器的功能给出了一些思路和研究方向。需要指出的是,本文中设计的所有腔体滤波器中均没有像传统腔体滤波器那样加入一些耦合调节元素,例如螺钉、切角等,保持了腔体的完整性,也降低了加工成本。
[Abstract]:With the rapid development of the communication industry in recent years, especially in 2013, the Ministry of Industry and Information Technology issued 4G licenses to the three major telecom operators, which put forward higher requirements for the communication system. As an indispensable key device in the communication system, filter not only has a profound impact on the communication quality, but also restricts the volume and cost of the whole communication system. Therefore, the study of filter has very important theoretical significance and potential economic value for the development of communication industry. Cavity filter is an ancient and long-lasting type of filter in the history of its development. Because of its high power capacity, low loss, high Q value and so on, it is widely used in digital television broadcasting, satellite communication, base station and so on. It is one of the important parts of communication system. In this paper, a series of multimode band-pass filters are designed in the following aspects: (1). The characteristics of this series of filters are that they have a pair of independent and controllable transmission zeros. These two transmission zeros can be placed on the left or right side of the passband independently, which improves the filter practicability. In the design process, the reasons for different modes of excitation are explained, which has a certain guiding and reference significance for the research and expansion of cavity filter. (2) A series of multi-band filters are designed, including two-frequency and three-frequency filters. The designed multiband filter is characterized by simple structure and good performance. If applied in communication system, the volume of communication system can be reduced. (3) combining the multi-mode bandpass filter and multi-band filter designed above, a multi-mode bandpass filter and a three-band pass filter are designed under the U-shaped slot line, which further verifies the design theory and analysis process. (4) the feasibility of the following research direction is pointed out, and some ideas and research directions are given for the further study of rectangular cavity filter and the expansion of the function of the filter. It should be pointed out that none of the cavity filters designed in this paper adds some coupling adjusting elements like the traditional cavity filters, such as screws, cutting angles, etc., which keep the integrity of the cavity and reduce the processing cost.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN713.5

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