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Development of design approaches for passive RF and microwave circuits using periodical structures.

机译：开发使用周期性结构的无源RF和微波电路的设计方法。

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摘要

This thesis deals with several design and analysis techniques for RF/microwave passive circuits such as interconnects, filters, and antennas that offer circuir size reduction and lower fabrication cost associated with future integrated communication systems. Presented are new design approaches to enhance performance of passive circuits and offer the ability to reduce size, minimize mismatch, reduce group delay variation, and alleviate unwanted odd-mode excitation. This work is developed by exporing and using periodic structure behavior in coplanar waveguide (CPW) designs. Periodic structures are known to have bandgaps such as those seen in electromagnetic bandgap (EBG) designs. Circuit based models were developed to predict the stop-band frequency range and to reduce computational time associated with full wave models. To reduce circuit size slow-wave designs can be employed. Thus, periodic structures in the form of interdigitated designs can be used to achieve this function when operating well below the bandgap frequency range. Herein, interdigitated coplanar waveguide designs are developed by increasing both inductance and capacitance per unit length to reduce circuit size, control signal phase, and match signal velocity. Geometrical characteristics of the proposed structures are analyzed with the S-paramters, effective dielectric constant, and attenuation constant. Design guidelines, which relate the effective dielectric constant to geometrical parameters, are also developed. To suppress slot-line mode excitation in circuits with structures, namely right-angle bends, slow wave structures can be used. In this work, novel designs for wire-bond free circular interdigitated bends are presented and compared to circuits with right-angle bends. Also shown is a novel alternative approach which presents a fast-wave design method and exploits it for suppression of slot-line mode excitation. In filter design, the interdigitatated approach is used to (1) reduce the size of a standard EBG based stopband filter by approximately 45% and (2) reduce the size of an ultra-wide band (UWB) bandpass filter by 40% when combined coupled line with meandered slot. Lately, annular ring slot antennas are miniaturized by leveraging the periodic nature of meander geometry to reduce the surface area of single- and dual-band annular ring slot antennas by 40% and 35%, respectively. The performance of all structures is evaluated by comparing modeled designs to the measured one in this thesis.
机译：本文研究了用于射频/微波无源电路（例如互连，滤波器和天线）的几种设计和分析技术，这些技术可以减小电路尺寸并降低与未来集成通信系统相关的制造成本。提出了提高无源电路性能的新设计方法，并提供了减小尺寸，最小化失配，减少群时延变化以及减轻不必要的奇模激励的能力。通过研究和使用共面波导（CPW）设计中的周期性结构行为来开展这项工作。已知周期性结构具有带隙，例如在电磁带隙（EBG）设计中看到的带隙。开发了基于电路的模型来预测阻带频率范围并减少与全波模型相关的计算时间。为了减小电路尺寸，可以采用慢波设计。因此，当在带隙频率范围以下工作时，采用叉指设计形式的周期性结构即可实现此功能。本文中，通过增加单位长度的电感和电容来减小电路尺寸，控制信号相位和匹配信号速度，从而开发了叉指共面波导设计。利用S参数，有效介电常数和衰减常数分析​​了所提出结构的几何特征。还制定了设计指南，将有效介电常数与几何参数相关联。为了抑制具有直角弯曲结构的电路中的缝线模式激励，可以使用慢波结构。在这项工作中，提出了用于无引线键合的圆形叉指弯曲的新颖设计，并将其与具有直角弯曲的电路进行了比较。还显示了一种新颖的替代方法，该方法提出了一种快速波设计方法，并将其用于抑制缝线模式激励。在滤波器设计中，采用交叉指法可（1）将基于EBG的标准阻带滤波器的尺寸减小约45％，（2）将超宽带（UWB）带通滤波器的尺寸减小40％带有弯曲槽的耦合线。最近，通过利用曲折几何形状的周期性来使环形环形缝隙天线小型化，以分别将单频带和双频带环形环形缝隙天线的表面积减小40％和35％。本文通过比较建模设计与实测设计来评估所有结构的性能。

著录项

  • 作者

    Kim, Ho Saeng.;

  • 作者单位

    University of Minnesota.;

  • 授予单位 University of Minnesota.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 184 p.
  • 总页数 184
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

  • 入库时间 2022-08-17 11:38:26

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