功率比可重构功分器设计
功率比可重构功分器设计(外文翻译,论文11000字)
摘要:极化可重构天线可以一个天线实现多个天线的功能,它可以根据实际环境的变化选择合适的极化方式,这样就能够有效的减少极化失配带来的功率损失。可重构功分器的优势还在于增强信号的抗干扰能力,提高系统的传输效率,减轻天线负载装置的重量,降低成本,减小平台的雷达散射截面实现良好的电磁兼容特性。本文通过pin开关和耦合器实现实现馈电方式的转变,从而实现极化方式的转变。通过添加少量的开关和适当的利用耦合器,电容元件,实现三端口网路的输出端的功率比在1:0和1:1之间切换。
关键词:功率比可重构 极化可重构天线 功率平均分配Wilkinson功率分配器
Power ratio reconfigurable power dividers
ABSTRACT: In recent years, with the large capacity of wireless communications, multi-function, ultrawideband direction, one of the core device as a wireless communication antenna gets more and more attention. As a new type of polarization reconfigurable antenna it received widespread attention at home and abroad.Polarization reconfigurable antenna can be based on real-time changes in the environment to choose the right means of polarization, so that it can effectively reduce the power losses from the polarization mismatch, enhance the anti-jamming ability of signal, improve the transmission efficiency of the system.In this article,we can use the pin switch and change the way of coupler implementations of feeding, so as to realize the transformation of polarization modes.By adding a small amount of switch and appropriate use of coupler, cell capacity, the output power of 3 port network than switching between 1-0 and 1:1.
[资料来源:www.doc163.com]
KEY WORDS: Power ratio reconfigurable polarizationreconfigurable antenna Average power distribution Wilkinson power divider
目录
第一章绪论 5
1.1课题的背景及研究意义 5
1.2国内外研究现状 5
1.3论文工作和内容安排 6
1.3.1论文的主要内容 6
1.3.2论文的内容安排 6
第二章微带线基础 7
2.1 微带线 7
2.2功率分配器 8
2.2.1三端口网络(T型结) 9
2.2.2 T型结功率分配器 10
2.3Wilkinson功率分配器 11
2.3.1 偶-奇模分析技术 11
2.3.2不等分功率分配器和N路Wilkinson功率分配器 13
2.4四分之一波长变换 14
2.5耦合线定向耦合器 15
2.5.1耦合线理论 15 [资料来源:www.doc163.com]
第三章本课题的研究内容 17
3.1开关控制的可重构Wilkinson功率分配器 17
3.2可实现单向信号路径双向Wilkinson功率分配器 19
参考文献 29
致谢30