宽带平衡式滤波及功分网络电路的研究

发布时间：2018-05-05 02:09

本文选题：信号干扰技术 + 反相器　；参考：《南京理工大学》2017年硕士论文

【摘要】：随着无线技术的快速发展,多功能、高集成的射频综合系统中的信号完整性是一个极具挑战性的问题。电路功能的多样化、小型化和模块化使得电路节点之间的电磁干扰和介质层间的串扰影响十分明显。相对于单端电路,平衡电路具有共模抑制特性,可以有效地降低系统噪声,减小电路组件的串扰。因此,平衡电路在通信系统中受到越来越多的关注。具有选频特性的滤波器,以及实现信号的分配与合成的功分/合成器,是微波设备中不可或缺的组成部分,它们广泛地应用于微波通信、电子对抗、微波测量和频率综合等领域。因此,基于平衡式的滤波器和功分/合成网络的研究有着重要的意义。针对平衡电路中的热点与难点问题,本论文结合信号干扰技术和新型传输线探索实现宽带平衡电路的设计方法,以实现电路的高性能为目标,开展了以下三个方面的工作:1.基于信号干扰技术的超宽带平衡滤波器的分析与设计:首先介绍了信号干扰技术,并推导了四端口平衡电路的混合模S参数。然后,利用180°移相结构和横向式滤波器结构的理论模型,完成两种平衡滤波器的设计与加工。电路中两路信号的同相叠加和反相相消实现了宽频段的差模传输和共模抑制。这部分研究成果已在Applied Computational Electromagnetiecs Society杂志上发表。2.基于DSPSL的宽带平衡功率分配/合成网络的分析与设计:首先介绍了双面平行带线(DSPSL)的结构特性,并推导了六端口平衡电路的混合模S参数。利用DSPSL设计了不随频率变化的反相器,实现宽频段的隔离度。在此基础上,通过加载的半波长开路支节,拓展了功率分配/合成网络的共模抑制带宽。这部分成果已在IEEE Transactions on Microwave Theory and Techniques,IEEE Microwave and Wireless ComponentsLetters杂志上发表,其中基于双面平行带线的六端口平衡功分网络申请了一项专利。3.基于耦合线加载的滤波功分器及其平衡电路的分析和设计:提出了三种新型的具有宽频谐波抑制的滤波功分器和平衡式功分器。通过采用耦合线代替功分器中的λ/4阻抗变换线,可以灵活地实现阻抗匹配,更有效地实现功分器的滤波功能。另外,阶跃耦合线进一步增加了带外传输零点个数,拓宽了上阻带的谐波抑制。最后,设计并加工了一种具有宽频段共模抑制和高隔离度的平衡式滤波功分器。这部分成果已投稿IEEE Transactions on Microwave Theory and Techniques,IEEE Transactions on Components Packaging and Manufacturing Technology。
[Abstract]:With the rapid development of wireless technology, the signal integrity in multifunctional and highly integrated RF integrated systems is a very challenging problem. With the diversification of circuit functions, miniaturization and modularization, the effects of electromagnetic interference between circuit nodes and crosstalk between dielectric layers are obvious. Compared with the single-ended circuit, the balancing circuit has the characteristics of common mode suppression, which can effectively reduce the system noise and the crosstalk of the circuit components. Therefore, more and more attention has been paid to the balance circuit in the communication system. Filters with the characteristics of frequency selection, as well as power division / synthesizer for signal distribution and synthesis, are indispensable components of microwave equipment. They are widely used in microwave communication, electronic countermeasures, Microwave measurement and frequency synthesis. Therefore, the research of balanced filter and power division / synthesis network is of great significance. Aiming at the hot and difficult problems in the balance circuit, this paper combines the signal interference technology and the new transmission line to explore the design method of the wideband balance circuit. With the goal of realizing the high performance of the circuit, the following three aspects of work are carried out: 1. The analysis and design of UWB balanced filter based on signal interference technology: firstly, the signal interference technology is introduced, and the mixed mode S parameters of four-port balancing circuit are deduced. Then, using the theoretical model of 180 掳phase-shift structure and transversal filter structure, the design and fabrication of two kinds of balanced filters are completed. In the circuit, the two signals are superposed in the same phase and the inverse cancellation realizes the differential mode transmission and common mode suppression in the wide band. This part of the study is published in the journal Applied Computational Electromagnetiecs Society. Analysis and Design of Wideband balanced Power Distribution / Synthesis Network based on DSPSL: firstly, the structure characteristics of double-sided parallel strip-line DSPSLs are introduced, and the hybrid mode S parameters of six-port balanced circuit are derived. The inverter is designed with DSPSL to realize the isolation of wide band. On this basis, the common-mode suppression bandwidth of the power distribution / synthesis network is extended by loading the half-wavelength open branch. The results were published in the IEEE Transactions on Microwave Theory and Techniques-IEEE Microwave and Wireless ComponentsLetters magazine, in which the six-port balanced power distribution network based on double-sided parallel tape lines applied for a patent .3. Analysis and Design of filter Power Divider and its balancing Circuit based on Coupling Line loading: three new filter power dividers and balanced power dividers with broadband harmonic suppression are proposed. By using coupling line instead of 位 / 4 impedance transformation line in power divider, impedance matching can be realized flexibly and the filter function of power divider can be realized more effectively. In addition, the step coupling line further increases the number of transmission zeros outside the band and broadens the harmonic suppression of the upper stopband. Finally, a balanced filter power divider with wide band common mode suppression and high isolation is designed and fabricated. This part of the work has been submitted to the IEEE Transactions on Microwave Theory and technical question-IEEE Transactions on Components Packaging and Manufacturing technology.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713;TN626

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