耦合微带线定向跨耦合器的设计与应用

发布时间：2018-01-08 17:33

本文关键词：耦合微带线定向跨耦合器的设计与应用　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：定向耦合器是一种具有方向性的功率分配器件,在微波通信领域具有广泛的应用。传统耦合微带线定向耦合器难以实现强耦合且在某些应用中会增加电路复杂性,产生寄生效应。定向跨耦合器是近些年提出的新型定向耦合器,该器件能够通过加载其他元件实现强耦合,并有效避免某些应用中传统耦合微带线定向耦合器的线路交叉问题,减小寄生效应,在有源电路里可实现DC阻塞,从而比传统耦合微带线定向耦合器具有更优越性能,因此对定向跨耦合器性能的研究也越来越热门。本文通过微波网络理论研究定向跨耦合器信号传输的实现条件,利用奇偶模分析,提出不同加载方案进行定向跨耦合器的设计。通过不同的加载方案实现定向跨耦合器方向性的改善,并减小定向跨耦合器的尺寸,更有利于器件集成。同时针对周期加载方案不能实现弱耦合定向跨耦合器的问题,提出弱耦合定向跨耦合器的设计方案。而后列举定向跨耦合器的一些实际应用,并对比分析其与传统耦合微带线定向耦合器的优势所在。本文根据奇偶模分析理论,分析并设计了不同耦合度的定向跨耦合器,在保持其基本性能不变的前提下,有效地将其尺寸缩小55%。同时根据定向跨耦合器信号传输特点设计并制作了多种新型应用拓展。
[Abstract]:Directional coupler is a directional power divider. Traditional coupled microstrip line directional coupler is difficult to realize strong coupling and will increase circuit complexity in some applications. Directional transcoupler is a new type of directional coupler proposed in recent years, which can realize strong coupling by loading other elements. The circuit crossing problem of traditional coupled microstrip line directional coupler is avoided and parasitic effect is reduced. DC blocking can be realized in active circuit. Therefore, the performance of the coupler is better than that of the traditional coupling microstrip line directional coupler. Therefore, the research on the performance of directional transcoupler is becoming more and more popular. In this paper, the realization condition of signal transmission of directional transcoupler is studied by microwave network theory, and the odd-even mode analysis is used. Different loading schemes are proposed to design directional transcoupler. The directional transcoupler directivity is improved by different loading schemes and the size of directional transcoupler is reduced. At the same time, the periodic loading scheme can not realize weakly coupled directional cross-coupler. The design scheme of weakly coupled directional transcoupler is presented, and some practical applications of directional transcoupler are listed. The advantages of the coupler compared with the traditional coupling microstrip line directional coupler are analyzed and analyzed. According to the theory of odd-even mode analysis, the directional transcoupler with different coupling degree is analyzed and designed. On the premise of keeping its basic performance unchanged, it can effectively reduce its size by 55. At the same time, a variety of new applications are designed and expanded according to the characteristics of directional transcoupler signal transmission.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN622

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