多系统合路平台中高性能合路器的设计与实现

发布时间：2018-04-11 07:18

本文选题：POI + 合路器　；参考：《电子科技大学》2017年硕士论文

【摘要】：现如今通信技术的发展日新月异,华为公司的Polar Code(极化码)方案也在2016年11月最终战胜欧美强国,成为5G控制信道eMBB(增强移动宽带)场景编码最终方案,而4G通信在城市已经全面普及开来,通信频段频率不断升高细分,通信制式也逐渐多种多样,3G的CDMA和4G的TD-LTE。为了实现各个通信频段信号的上行下行,室内通信分布系统变得越来越复杂,而很多时候各个运营商又分别建立自己的覆盖系统造成的重复建设加剧了这一现状。因此多系统合路平台(POI)的设计和推广应用显得尤为必要,而其中关键部分多频合路器的设计具有重要意义。多频合路器的设计从上个世纪中后叶开始就有很多前人的研究,受限于理论和计算机技术的发展等相关因素,到近些年才逐渐趋于成熟,能够采用多通带滤波器并联方式实现合路以及灵活选择结构来达到设计指标。本文的主要工作就是设计实现高隔离、低插损和高带外抑制等一些性能和结构上要求严苛的五通带合路器。多频合路器可以分解为几个单通带滤波器结构,所以本文首先对多频合路器的基础部分——滤波器进行详细理论介绍,着重从广义切比雪夫型滤波器及交叉耦合矩阵方面分析,为后续的各路复杂结构滤波器设计提供理论支撑,同时也结合仿真软件HFSS讨论耦合系数的计算公式。然后开始从HFSS单双腔谐振频率与耦合系数的仿真展开,在实际设计中分析滤波器结构对性能的影响,特别是应用较多的CT和CQ交叉耦合及端口耦合结构等,又从仿真设计方法运用方面主要对Y矩阵法进行讨论,此方法在本文设计过程中广泛运用于调节谐振与耦合。接着按照我们的软件仿真设计思路从coupleFila确定拓扑结构与提取初始耦合矩阵到二维软件AWR进行电路模型仿真,然后到HFSS中建模设计出每个通带滤波器,最后合路仿真,中间也重点讨论到排腔结构和公共腔的引入以减少合路端抽头数量,减小合路器体积,简化加工,降低各通带间相互影响。最后加工测试得到设计出的高性能合路器。
[Abstract]:With the rapid development of communication technology, Huawei's Polar Code (polarization Code) scheme finally defeated the European and American powers in November 2016 and became the final scenario coding scheme of the 5G control channel, eMBB (enhanced Mobile Broadband).4G communication has been widely used in cities, the frequency of communication band is increasing and subdivision, and the communication system is becoming more and more diverse, such as CDMA of 3G and TD-LTE of 4G.In order to realize the uplink and downlink of each communication band, the indoor communication distribution system becomes more and more complex.Therefore, the design and popularization of POI) is particularly necessary, and the design of the key part of the multifrequency combiner is of great significance.Since the beginning of the last century, the design of multi-frequency combiner has been studied by many predecessors. Limited by the development of theory and computer technology and other relevant factors, the design of multi-frequency combiner has gradually matured in recent years.The multiband filter can be used in parallel to realize the combination of circuit and flexibly select the structure to achieve the design target.The main work of this paper is to design and implement a five-way band combiner with strict performance and structure requirements, such as high isolation, low insertion loss and high out-of-band suppression.The multifrequency combiner can be decomposed into several single-pass band filter structures, so the basic part of the multiband combiner is introduced in detail in this paper, especially from the aspects of generalized Chebyshev filter and cross-coupling matrix.It provides theoretical support for the subsequent design of complex structure filters, and also discusses the calculation formula of coupling coefficient in combination with the simulation software HFSS.Then the simulation of HFSS single and double cavity resonant frequency and coupling coefficient is carried out, and the influence of filter structure on the performance is analyzed in the practical design, especially in the application of CT and CQ cross-coupling and port coupling structure, etc.The Y matrix method is discussed from the application of simulation design method, which is widely used in regulating resonance and coupling in the design process of this paper.Then according to our software simulation design idea, from determining topology structure and extracting initial coupling matrix of coupleFila to 2D software AWR, circuit model simulation is carried out, and then every passband filter is modeled and designed in HFSS, and finally, combined circuit simulation is carried out.The introduction of cavity structure and common cavity is also discussed in order to reduce the number of taps, reduce the volume of combiner, simplify the processing, and reduce the interaction between each pass and band.Finally, the high performance combiner is designed by processing test.
【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】：TN929.5

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