摘要定向耦合器是微波系统中应用广泛的一种微波器件,它的本质是将微波信号按一定的比例进行功率分配。主要技术指标有方向性、驻波比、耦合度、插入损耗。
定向耦合器由传输线构成,同轴线、矩形波导、圆波导、带状线和微带线都可构成定向耦合器,所以从结构来看定向耦合器种类繁多。为了满足插入损耗小于0.2dB,耦合度40dB的要求,通过对比设计﹑仿真的难度和结果的精确度,最终选择在双孔定向耦合器理论基础上进行设计。通过计算得出参数,确定总体实现方案并完成电路设计、腔体设计,然后使用HFSS软件进行设计仿真,最后根据结果对参数进行调整,使其基本达到了设计的要求。61692
关键词 小孔耦合 定向耦合器 HFSS仿真
毕业设计说明书(论文)外文摘要
Title Ka Band Waveguide Coupler Design And Simulation
Abstract The directional coupler is a microwave device which is widely used in microwave system,it is the nature of microwave signal power allocation according to certain proportion.The main technical indicators are directional, VSWR, coupling, insertion loss.
Directional coupler constituted by the transmission lines, coaxial, rectangular waveguide, circular waveguide, stripline and microstrip can constitute directional coupler,so from a structural point of view there are a wide variety of directional couplers. To meet the requirement that the insertion loss is less than 0.2dB, 40dB coupling,by comparing the difficulty of design and simulation and accuracy of the results,the final choice is based on the two-hole directional coupler theory.Through calculation parameters to determine the overall realization of the program and complete the circuit design, cavity design, and then use HFSS to simulate the design, the final parameters can be adjusted based on the results, it basically meet the design requirements.
Keywords Small hole coupling Directional coupler HFSS simulation
1 引言(或绪论) 1
1.1 概述 1
1.2 章节分布 2
2 矩形波导 4
2.1 矩形波导中的模式 4
2.2 TE10模的场结构及其传输参量 5
2.3 本章小结 9
3 定向耦合器的基础知识 10
3.1 定向耦合器的原理 10
3.2 定向耦合器的性能指标 11
3.3 定向耦合器的类型 12
3.4 定向耦合器的网络分析 14
3.5 本章小结 16
4 矩形波导双孔定向耦合器设计 17
4.1 矩形波导双孔定向耦合器的工作原理 14
4.2 矩形波导双孔定向耦合器的尺寸 18
4.3 本章小结 19
5 HFSS软件仿真 20
5.1 HFSS软件的计算原理 20
5.2 建立HFSS工程的一般过程 24
5.3 在HFSS中建立矩形波导双孔定向耦合器模型 24
5.4 实际问题的讨论 27
5.5 本章小结