平面集成相邻信道多工器的研究

发布时间：2018-05-15 17:48

本文选题：基片集成波导 + 主动空间映射　；参考：《东南大学》2015年硕士论文

【摘要】：通信卫星的微波载荷系统、雷达系统和地面无线通信基站的射频单元系统都需要处理多频段、大功率的微波射频信号。在这些微波系统中,高性能双工及多工器组成的子系统是必不可少的。一个多工器网络由多个通道选择滤波器组成。这些滤波器要求以最小的插损来选择所需频段的微波信号,同时将带外的干扰抑制到一个可以接收的范围。在信道相邻多工器的设计中,信道滤波器之间的相互影响十分严重,采用传统设计方法,往往需要数天甚至数星期才能获得较好的设计结果。为了提高设计效率,同时节省器件的体积和重量,本文研究了一种紧凑型的平面集成相邻信道波导多工器并提出了其系统设计方法,极大的提高了设计效率和器件性能。论文使用基片集成波导(Substrate Integrated Waveguide, SIW)技术对信道相邻输出型微波多工器进行了研究。为此,首先对传统的微波多工器、基片集成波导技术、微波滤波器及其设计技术进行了回顾。由于基片集成波导多工器复杂的结构及较多的不连续性,使得全波分析时产生大量网格数,直接进行传统的参数扫描或优化将会耗费大量的时间,对于工程上来说不可行,因此急需一种有效且准确的方法。近年来出现的空间映射算法可以很好地解决这个问题。结合主动空间映射法,在ADS和HFSS软件中分别建立电路模型(粗糙模型)和全波电磁模型(精确模型),使用该算法法找出电路模型和全波模型之间的映射关系,然后进行少数的几次迭代就可使多工器达到指标要求。整个过程只需要几次全波仿真,既获得了电路仿真的快速性又保证了全波仿真的准确性。利用此方法,论文对微波SIW单通带滤波器、双通带滤波器、双工器和多工器展开了研究。具体工作如下：在第一章中,论文回顾了微波多工器和SIW的发展。在第二章中,论文讨论微波滤波器设计的基本理论及空间映射算法。在第三章中,本文利用空间映射法,结合SIW和滤波器设计理论,研究了SIW单通带滤波器及双通带滤波器。提出了一种高效的SIW滤波器的设计方法并利用实验进行了验证。在第四章中,论文基于空间映射方法,对SIW信道相邻多工器进行了研究。提出了一种紧凑的平面集成微波多工器结构：发展了一种高效的信道相邻多工器的系统设计方法；以工作于X波段和Ka波段的四路信道相邻多工器为例,详细介绍了设计方法并利用实验进行了验证。最后在第五章中,对本文的工作进行了总结和展望。
[Abstract]:The microwave payload system of communication satellite, radar system and radio frequency unit system of terrestrial wireless communication base station all need to deal with multi-frequency and high-power microwave radio frequency signal. In these microwave systems, high performance duplex and multiplexer subsystems are essential. A multiplexer network consists of multiple channel selection filters. These filters require the minimum insertion loss to select the microwave signal in the desired frequency band and suppress the out-of-band interference to an acceptable range. In the design of channel adjacent multiplexer, the interaction between channel filters is very serious. The traditional design method usually takes days or even weeks to obtain better design results. In order to improve the design efficiency and save the volume and weight of the device, a compact planar integrated adjacent channel waveguide multiplexer is studied and its system design method is proposed, which greatly improves the design efficiency and device performance. In this paper, the substrate Integrated Waveguide, SIW) technique is used to study the adjacent channel output microwave multiplexer. Firstly, the traditional microwave multiplexer, substrate integrated waveguide technology, microwave filter and its design techniques are reviewed. Because of the complex structure and more discontinuities of the substrate integrated waveguide multiplexer, a large number of meshes are generated in the full-wave analysis, and the traditional parameter scanning or optimization will take a lot of time, which is not feasible in engineering. Therefore, an effective and accurate method is urgently needed. The spatial mapping algorithm that appeared in recent years can solve this problem very well. Combined with active space mapping method, circuit model (rough model) and full wave electromagnetic model (exact model) are established in ADS and HFSS software respectively. The mapping relationship between circuit model and full wave model is found by using this algorithm. Then a few iterations are carried out to make the multiplexer meet the specifications. The whole process requires only a few full wave simulations, which not only obtains the speed of circuit simulation, but also ensures the accuracy of full wave simulation. Using this method, microwave SIW single pass band filter, duplex and multiplexer are studied in this paper. The main work is as follows: in the first chapter, the development of microwave multiplexer and SIW is reviewed. In the second chapter, the basic theory of microwave filter design and spatial mapping algorithm are discussed. In the third chapter, the SIW single pass band filter and double pass band filter are studied by using the spatial mapping method and the theory of SIW and filter design. An efficient design method of SIW filter is proposed and verified by experiments. In chapter 4, based on spatial mapping method, adjacent multiplexers in SIW channel are studied. In this paper, a compact planar integrated microwave multiplexer structure is proposed. An efficient system design method for channel adjacent multiplexer is developed, and a four-channel adjacent multiplexer operating in X-band and Ka band is taken as an example. The design method is introduced in detail and verified by experiments. Finally, in the fifth chapter, the work of this paper is summarized and prospected.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN631.2

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