半模基片集成波导带通滤波器的研究与设计

发布时间：2018-06-25 14:08

本文选题：半模基片集成波导 + 带通滤波器　；参考：《西安电子科技大学》2015年硕士论文

【摘要】：随着无线通信系统的发展,对小型化、低成本、多功能设备的需求越来越高。微波滤波器作为通信系统射频前端的重要器件之一,其设计的结构、材料和方法也逐渐增多。基片集成波导(SIW)这种新的导波结构,由于其品质因数高、功率容量大、尺寸小、易加工等优点得到了广泛的应用,而半模基片集成波导(HMSIW)在保留SIW特性的同时尺寸比SIW减小了一半,使其在滤波器、双工器、天线、振荡器等有源及无源器件中也越来越多。本文研究并实现了几种高性能、小型化的HMSIW带通滤波器;同时提出了一种新型的慢波半模基片集成波导结构,并研究了这种结构的传输特性及设计方法。论文的具体研究工作包括以下几个方面:首先,本文介绍了HMSIW的基本结构和传输特性,包括其传输模式、设计原理及转换结构等。同时介绍了传统HMSIW带通滤波器主要是感性金属孔耦合带通滤波器外部Q值和耦合系数具体的提取方法,并总结了此类滤波器的具体设计方法。其次,本文设计了两种新型的小型化HMSIW带通滤波器:一种是在差分HMSIW传输线中引入DGS结构实现的平衡超宽带HMSIW滤波器;另一种是在HMSIW结构的上下表面引入尺寸不同的CSRR结构实现的基于CSRR的HMSIW双通带滤波器。文中详细地介绍了这两款滤波器的设计方法和实现过程。两者的仿真和测试结果符合较好,验证了设计方法及理论的正确性。最后,本文提出了一种新的慢波半模基片集成波导结构,该结构是在慢波基片集成波导的结构的基础上进行改进得到的小型化HMSIW结构,本文对传输特性进行了分析。同时设计了一款基于SW-HMSIW超宽带陷波带通滤波器。通过对其S参数的仿真及实物的加工测试,验证了设计的准确性。
[Abstract]:With the development of wireless communication system, the demand for miniaturization, low-cost and multi-function equipment is increasing. Microwave filter is one of the most important devices in RF front end of communication system. Substrate integrated waveguide (SIW), a new guided wave structure, has been widely used because of its high quality factor, large power capacity, small size and easy processing. The half-mode substrate integrated waveguide (HMSIW) reduces the size of SIW by half, which makes it more and more active and passive devices such as filters, duplexers, antennas, oscillators and so on. In this paper, several high performance and miniaturized HMSIW bandpass filters are studied and implemented, and a novel slow wave half-mode substrate integrated waveguide structure is proposed, and its transmission characteristics and design methods are studied. The research work includes the following aspects: firstly, this paper introduces the basic structure and transmission characteristics of HMSIW, including its transmission mode, design principle and conversion structure. At the same time, the traditional HMSIW band-pass filter is mainly the extraction method of external Q value and coupling coefficient of inductive metal hole coupling band-pass filter, and the concrete design method of this kind of filter is summarized. Secondly, two new miniaturized HMSIW bandpass filters are designed: one is a balanced ultra-wideband HMSIW filter with DGS structure introduced into the differential HMSIW transmission line; The other is a CSR-based HMSIW dual-pass band filter with different sizes of CSRR on the upper and lower surfaces of the HMSIW structure. The design method and implementation process of the two filters are introduced in detail. The simulation and test results agree well with each other and verify the correctness of the design method and theory. Finally, a new slow wave half-mode substrate integrated waveguide structure is proposed, which is a miniaturized HMSIW structure based on the structure of the slow wave substrate integrated waveguide. The transmission characteristics are analyzed in this paper. At the same time, a notch band filter based on SW-HMSIW is designed. The accuracy of the design is verified by the simulation of S parameters and the processing test.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.5

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