HFSS毫米波微带—波导的转换电路设计
毕业论文关键词: K 波段，E 面探针结构，H 面探针结构，微带-波导过渡转换结构
Title Design of millimeter wave microstrip waveguide transition circuit
Abstract In microwave and millimeter wave circuits, microstrip line is a very important form of transmission, but a lot of millimeter wave test system using rectangular waveguide interface. Therefore, microstrip to waveguide transition structure is widely used become the key technology to realize the good matching of the transition. This paper introduces several common microstrip waveguide transition technology, and detailed analysis of the probe type microstrip waveguide transition structure, and it can be pided into two kinds of E surface structure and H surface structure. The use of HFSS software is designed to work in millimeter wave, the insertion loss is less than 0.3dB, the K-band (18-26.5GHz) section of the wave section of the probe type microstrip waveguide E surface transition structure. Design is based on the impedance matching principle, and through the design of the waveguide short circuit terminal distance, probe width, length, so that it can meet the requirements of the design, to meet the requirements of the project Keywords: K-band, E surface probe structure, H surface probe structure, microstrip waveguide transition structure 目次
1绪论.1
1.1引言1
1.2微带-波导过渡的简介.1
1.3本论文的任务4
2微带传输线6
2.1微带线的结构6
2.2微带传输线的特性6
2.3本章小结11
3矩形波导12
3.1矩形波导基础12
3.2矩形波导中的波型及截止波长.13
3.3波导相速和波长14
3.4波导损耗15
3.5波导管尺寸的选择16
3.6本章小结.16
4探针式结构中模块的介绍.18
4.1阻抗变换器18
4.2探针激励方法19
4.3本章小结.20
5K波段探针式微带-波导的过渡结构设计.22
5.1设计思路22
5.2K波段E面探针结构微带-波导的过渡结构设计.23
5.3K波段H面探针结构微带-波导的过渡设计.25
5.4本章小结27
结论.28
致谢.29
参考文献30
1 绪论
1.1 引言 伴随着毫米波技术应用的不断增多,毫米波单片集成电路(MMIC)因具有成本低、可靠性高的特点而被广泛使用。 在用MMIC的毫米波接收系统中,各MMIC之间采用微带线进行连接。虽然微带线正被越来越多的使用，然而现有的毫米波测试系统使用的仍是标准矩形波导结构， 因此人们日益关注如何实现微带到波导的有效的转换。在 MMIC 系统中，需要找出一种低损耗、低成本且容易制造的微带到波导的过渡方法，完成微带电路的性能测试。目前常用过渡结构有:对脊鳍线过渡、阶梯脊波导过渡、耦合探针过渡等。这些过渡结构插入损耗小、带宽较宽。