多频微带功率分配器的研究与设计

发布时间：2018-01-26 09:36

  本文关键词： 三阶阻抗谐振器 马刺线 展边矩形环 带外抑制 功分器　出处：《西安电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着微波通信技术的的飞速发展,功率分配器作为关键器件之一广泛应用于无线通信及卫星导航系统的天线馈电网络与射频通道中,如天线阵列、功率放大器、移相器以及调制解调器等。由于频率资源日益紧张,对于多频功率分配器的需求也随之增加,其多功能化及集成化已成为当前国际该领域的研究热点。本文研究双频和多频功分器的设计,基于阶梯阻抗谐振器等微带结构,提出了多种双频功分器、小型化三频功分器、改进型三频功分器的设计方法。具体工作的主要内容如下:首先,本文通过对国内外的大量相关文献进行整理和分析,总结了多频功分器的研究现状和热点。然后介绍了功分器的相关指标、设计方法和谐振器理论。基于Wilkinson功分器,采用两阶阻抗变换器加载并联短路枝节替代四分之一波长变换器,通过奇-偶模方法和传输线理论推导出双频功分器的设计公式,实现了工作在0.95GHz和2.2GHz的紧凑型双频功分器。然后采用全波仿真软件进行了仿真分析,验证了设计方法的准确性,最后制作电路板并且测试了该双频功分器,最终实测结果与仿真结果一致,符合设计要求。其次,为了满足多频微波器件的需求,本文研究了三频功分器的设计。采用三个相同的三阶阶梯阻抗谐振器,通过缝隙耦合,实现了三频功分器的设计。通过折叠微带线使得整个功分器的尺寸变小,并且该功分器具有滤波特性。在仿真的基础上进行实物加工测试,最终实测结果与仿真结果基本一致,验证了结果。最后,基于上述小型化三频功分器,在谐振器上加载马刺线结构以及在地板上加载展边矩形环缺陷地结构,通过调节马刺线和展边矩形环的尺寸,实现了具有良好带外抑制的三频功分器。对实物进行加工测试,通过仿真和实测,验证了设计方法的有效性和准确性。
[Abstract]:With the rapid development of microwave communication technology, power divider, as one of the key devices, is widely used in antenna feed network and RF channel of wireless communication and satellite navigation system, such as antenna array, power amplifier. Due to the increasing shortage of frequency resources, the demand for multi-frequency power divider is also increasing. In this paper, the design of dual-frequency and multi-frequency power dividers is studied. Based on the microstrip structure such as step impedance resonator, a variety of dual-frequency power dividers are proposed. The design method of miniaturized three-frequency power divider and improved three-frequency power divider. The main contents of the specific work are as follows: first, this paper collates and analyzes a large number of related literature at home and abroad. This paper summarizes the research status and hot spots of multi-frequency power divider, and then introduces the related indexes, design method and resonator theory of the power divider, based on Wilkinson power divider. The design formula of dual-frequency power divider is derived by using the odd-even mode method and transmission line theory to replace 1/4 wavelength converter with two-order impedance converter loaded parallel short circuit branch. The compact dual-frequency power divider working at 0.95GHz and 2.2GHz is realized. Then the simulation analysis is carried out using full-wave simulation software to verify the accuracy of the design method. Finally, the circuit board is fabricated and the dual-frequency power divider is tested. The measured results are consistent with the simulation results, which meet the design requirements. Secondly, in order to meet the needs of multi-frequency microwave devices. In this paper, the design of three-frequency power divider is studied. Using three identical third-order step impedance resonators, the design of three-frequency power divider is realized by slot coupling. The size of the whole power divider is reduced by folding microstrip line. And the power divider has filtering characteristics. On the basis of simulation, physical processing tests are carried out. The final measured results are basically consistent with the simulation results, and the results are verified. Finally, based on the miniaturization of the three-frequency power divider mentioned above. The Spurs line structure is loaded on the resonator and the defect ground structure is loaded on the floor by adjusting the size of the spurs line and the extended rectangular ring. A tri-frequency power divider with good out-of-band suppression is realized. The validity and accuracy of the design method are verified by simulation and measurement.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN626

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本文编号：1465287