【作者】 李佳；

【导师】 黄文；

【作者基本信息】 重庆邮电大学 ， 电子科学与技术， 2019， 硕士

【摘要】 现代通信技术的发展对射频器件的小型化提出了越来越高的要求。平面型慢波传输线因其设计灵活和易于加工的优点被广泛应用于射频器件的小型化设计当中,成为了当前射频器件研究领域的一个热点课题。此外,研究如何使射频器件具备谐波抑制效果,改善通信系统的信噪比和通信质量也成为了射频器件研究领域的另一个热点课题。本文设计两款微带平面型慢波传输线和一款共面波导(Coplanar waveguide,CPW)慢波传输线,同时介绍了它们在威尔金森功分器和分支线耦合器的小型化及谐波抑制方面的应用。利用折叠高低阻抗传输线和微带交指电容,设计了一款三角形慢波传输线。利用折叠高阻抗传输线,平板电容和H型缺陷地结构,设计了一款缺陷地矩形慢波传输线。利用交指电容和蛇形线,设计了一款共面波导慢波传输线。在传输线的分析部分,本文分别对这三款平面型慢波传输线的结构,小型化原理,等效电路参数提取,设计过程及仿真结果分析进行了详细的介绍。此外,还对三角形慢波传输线和缺陷地矩形慢波传输线的谐波抑制效果进行了讨论。在传输线的应用部分,利用三角形慢波传输线设计了具有谐波抑制效果的小型化威尔金森功分器和3dB分支线耦合器。这两款器件最终取得了41.2%和66.6%的尺寸减小效果。此外,器件的谐波抑制效果也得到了实物测试结果的验证。利用缺陷地矩形慢波传输线,设计了小型化谐波抑制威尔金森功分器和3dB分支线耦合器。最终测试结果表明这两款器件分别取得了66.8%和76.2%的尺寸减小和较宽的-20dB谐波抑制范围。利用共面波导慢波传输线,设计了一款小型化共面波导威尔金森功分器。器件的加工和测试结果表明,所设计的功分器实现了51%的尺寸减小。更多还原

【Abstract】 The development of modern communication technologies makes higher and higher requirements for the size miniaturization of radio frequency components.Planar slow-wave transmission lines,which have advantages of flexible design and easy fabrication,are widely used in the size miniaturization design of radio frequency components.And the method of size miniaturization by using planar slow-wave transmission lines has become a hot research spot for radio frequency components.In addition,making radio frequency components have harmonic suppression performance for improving the signal-to-noise ratio of communication system and communication quality has become another hot research spot.In this thesis,two kinds of microstrip planar slow-wave transmission lines and a kind of coplanar waveguide(CPW)slow-wave transmission line are designed.Then,introduction of their applications in size miniaturization and harmonic suppression of Wilkinson power divider and branch line coupler is proposed.By using folded stepped-impedance transmission lines and microstrip interdigital capacitors,a triangular slow-wave transmission line is designed.By using folded high-impedance transmission lines,parallel-plate capacitors and H-type defected ground structure,a rectangular slow-wave transmission line with defected ground is designed.By employing interdigital capacitor and meandered line,a coplanar waveguide slow-wave transmission line is designed.In the analysis sections of transmission line,we introduce the structure,size miniaturization principle,extraction of equivalent circuit parameters,design process and simulation results of the three planar slow-wave transmission lines in detail.In addition,the harmonic suppression performance of triangular slow wave transmission lines and rectangular slow-wave transmission lines with defected ground are discussed.In the application part of transmission lines,we use triangular slow-wave transmission line to design a miniaturized Wilkinson power divider and a 3dB branch line coupler with harmonic suppression.Final measured results revealed that 41.2% and 65.6% size reduction of these two components are achieved.In addition,the harmonic suppression performance of these components is verified by measured results.By employing rectangular slow-wave transmission lines with defected ground,miniaturized Wilkinson power divider and 3dB branch line coupler with harmonic suppression are designed.The final measured results demonstrate that the two designed components respectively achieve 66.8% and 76.2% size reduction and wide-20 dB range harmonic suppression.By utilizing coplanar waveguide slow-wave transmission lines,a miniaturized coplanar waveguide Wilkinson power divider is designed.Finally,the results of fabrication and measurement reveal that the designed power divider achieves 51% size reduction.更多还原