基于耦合模理论的多模谐振耦合电路研究

发布时间：2018-05-26 14:40

本文选题：耦合模理论 + 多模耦合　；参考：《浙江大学》2017年硕士论文

【摘要】：滤波器和环形器是微波通信系统中的重要组成部分,在无线通信基站及终端产品中得到广泛应用。本文首次将光学中的耦合模理论融入基于多模谐振耦合的微波电路设计中,并分别进行了微带带通滤波器和有源三端口环形器的设计研究。本文首先详细推导了 N个谐振模式的耦合情况,提出了 N阶无源滤波器从解析计算到特征模仿真并最终优化实现的完整的综合设计方法。并且成功将损耗项引入解析计算中,实现了理论计算与全波仿真的滤波器频率响应结果间的良好吻合,大幅提高滤波器的设计速度和精度。其后,基于该方法设计了具有强阻带抑制的以GaAs为衬底材料的二阶、三阶微带带通滤波器和利用PCB材料制作的板级三阶微带带通滤波器。利用三维电磁仿真软件HFSS和射频电路设计与仿真软件ADS对设计的滤波器进行了建模、仿真及优化,并对滤波器实物进行了相关测试,测试结果与理论仿真结果吻合良好。此外,基于耦合模理论完成了片上集成非互易器件的设计和实现,研制了一种连续波收发共用雷达系统中的微波有源三端口环形器。对其分别进行了板级和芯片级的设计和仿真优化。仿真结果显示,所设计的有源三端口环形器在工作频率范围内具有较好的传输与隔离性能。此环形器的设计方法对实现传统非互易微波器件的芯片化并最终实现与系统前端微波电路的单芯片集成化发展有着重要意义。最后,本文对于研究过程中出现的误差和相关问题以及可改进提高之处进行了总结与展望。
[Abstract]:Filters and circulators are important components of microwave communication systems and are widely used in wireless communication base stations and terminal products. In this paper, the coupling mode theory in optics is first incorporated into the microwave circuit design based on multi-mode resonant coupling, and the design of microstrip bandpass filter and active three-port circulator are studied respectively. In this paper, the coupling of N resonant modes is deduced in detail, and a comprehensive design method of N order passive filter from analytic calculation to feature simulation is presented. The loss term is successfully introduced into the analytical calculation, which achieves a good agreement between the theoretical calculation and the frequency response results of the full-wave simulation filter, and greatly improves the design speed and accuracy of the filter. Then, based on this method, the second-order, third-order microstrip bandpass filters with strong stopband suppression on GaAs substrate and the board-level third-order microstrip bandpass filters fabricated from PCB materials are designed. The designed filter is modeled, simulated and optimized by using 3D electromagnetic simulation software HFSS and RF circuit design and simulation software ADS, and the filter physical object is tested. The test results are in good agreement with the theoretical simulation results. In addition, based on the coupled mode theory, the design and implementation of on-chip integrated non-reciprocal devices are completed, and a microwave active three-port circulator in a continuous wave transceiver radar system is developed. The design and simulation optimization of board level and chip level are carried out respectively. The simulation results show that the designed active three-port circulator has better transmission and isolation performance in the operating frequency range. The design method of the annular device is of great significance to realize the chip of traditional non-reciprocal microwave device and finally realize the development of single-chip integration with the front-end microwave circuit of the system. Finally, this paper summarizes and prospects the errors and related problems in the research process.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713;TN621

【参考文献】