摘要 随着现代通信的发展，为了充分利用频谱资源，双频以及多频通信电路的研究成为热点。功分器是重要的无源微波部件之一，广泛应用于电子通信系统中。本文对双频 Wilkinson功分器进行设计，具有重要的实用价值。 本毕业论文首先采用奇-偶模分析方法对传统的 Wilkinson 功分器分析，阐述了Wilkinson 功分器取得良好端口匹配和输出隔离性能的原理。在此基础上设计，针对双频应用，采用在传输线阻抗变换器的输出端口处并联一段开路微带线替代传统贴片电容和电感，设计了工作频率为 3GHz 和 6GHz 的双频 Wilkinson 微带功分器。仿真结果表明，该功分器工作频率分别为3GHz和 6GHz，输入端口回波损耗大于 20dB，输出端口的隔离优于 15dB，并且是平面微带线结构。本设计计算结果准确，方法灵活，在实际通信射频电路中具有良好的使用前景。9656
关键词:功分器,奇-偶模分析,双频,微带,带宽
Title Title Title Title Dual-frequency Wilkinson power pider
Abstract Abstract Abstract Abstract
With the development of the modern communication technique, there has
been increasing interest in study on dual-frequency and multi-frequency
microwave circuits for complete utilization of spectrum resources. Power
pider is an important passive microwave component and widely used in
electronic communication systems. Design of dual-frequency power pider
is investigated in this paper, which do much benefit to engineering
application.
Firstly, traditional Wilkinson power pider is analyzed based on
odd-even mode method to interpret its operating principle for desired
performance. Base on above analysis, a design of dual-frequency Wilkinson
power pider is presented with a novel structure. An open-circuit
microstrip-line is shunted at the outputs of the transmission line
impedance transitions to achieve dual-frequency operation. A pider
operating at 3GHz and 6GHz is successfully designed with HFSS software.
Simulated results show that dual-frequency is achieved; return loss at
input port is larger than 20dB, and isolation between two outputs better
than 15dB. This design with planar structure has desired prospect in
communication circuits.
Keywords ： power pider, odd-even mode analysis, dual-frequency,
microstrip,bandwith 目 次
1 绪论 1
1.1 多频功分器的研究背景 1
1.2 本文工作 1
2 微带功分器 2
2.1 三端口网络（T型结）2
2.2 Wilkinson功分器3
2.2.1 偶模分析 4
2.2.2 奇模分析 6
2.3 微带线简介7
3 双频Wilkinson 功分器设计10
3.1 双频Wilkinson 功分器原理分析10
3.1.1 奇偶模分析 11
3.1.2 双频分析13
3.2 双频Wilkinson 仿真设计13
3.2.1 设计计算 13
3.2.2 仿真模型15
3.2.3 仿真结果图16
3.3 实验结果分析18
结论 18
致谢 19
参考文献 19 1 绪论 绪论 绪论 绪论
1.1 多频功分器的研究背景 多频功分器的研究背景 多频功分器的研究背景 多频功分器的研究背景
随着移动通信的飞速发展，微波频段的使用越来越拥挤，同时，射频电路集成化要求程度也
越来越高，除了要求优良的性能外，还提出了低成本，低损耗，小体积和轻重量等要求，因此能 双频Wilkinson功分器设计+文献综述:http://www.751com.cn/tongxin/lunwen_8454.html