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Theory and design of mixed lumped-distributed cross-coupled filters with applications to linear phase shifter and tunable filters.

机译：混合集总分布交叉耦合滤波器的理论和设计及其在线性移相器和可调滤波器中的应用。

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摘要

Using cross-coupled networks of a new concept, transmission zeros were efficiently located in the complex frequency-domain. With this approach, the group delay and attenuation slope of the circuit network can be controlled to get both sharp rejection characteristics and linear phase slopes. In order to achieve this performance, various types of combline filters are suggested. Various simulation tools (commercial linear circuit and E-M simulators), as well as the developed pole-zero locator program, were used to design a new class of cross-coupled networks. In particular, the pole-zero locator program can be used to extract an equivalent circuit of the topology that is established from ether EM-simulated data or measured data.; A new cross-coupled quasi-elliptic combline bandpass filter is presented, borrowing the distributed implementation of the capacitance (a top surface metalized dielectric block added as an applique to the top of the circuit), which was conventionally used without metalization to enhance the directivity of the microstrip couplers. The required cross coupling value was achieved by changing the substrate thickness, dielectric constant and area of the top surface metallization of the dielectric block. Effectively, an inhomogeneous transmission line was used to achieve source-load direct cross-coupling with at least one additional transmission zero.; The first application presented, is a new type of reflection-type analog phase shifter using tunable short-terminated combline filters (STCL). An asymptotically approached 360-degree total phase shift is obtained, with a large linear range and an insertion loss of less than -1.5 dB over the full phase shift range at 5 GHz. The second approach presented, which is a new concept, is a tunable finite-transmission-zero filter, taking advantage of the unavoidable frequency dependence of each coupling. In order to obtain such a performance, ferroelectric or ferromagnetic stacked substrates are suggested for tuning the extra transmission zeros as well as the center frequency.
机译：使用新概念的交叉耦合网络，可以将传输零点有效地定位在复杂的频域中。使用这种方法，可以控制电路网络的群时延和衰减斜率，以获得尖锐的抑制特性和线性相位斜率。为了实现这一性能，建议使用各种类型的梳状线滤波器。各种仿真工具（商业线性电路和E-M仿真器）以及已开发的零极点定位器程序被用来设计一类新型的交叉耦合网络。特别地，零极点定位器程序可用于提取从以太EM模拟数据或测量数据建立的拓扑等效电路。提出了一种新的交叉耦合准椭圆梳状带通滤波器，它借鉴了电容的分布方式（顶部金属化的电介质块作为贴花添加到电路顶部），通常不使用金属化来提高方向性微带耦合器。所需的交叉耦合值是通过改变衬底厚度，介电常数和介电块顶表面金属化面积来实现的。有效地，使用不均匀的传输线以至少一个额外的传输零来实现源-负载直接交叉耦合。提出的第一个应用是使用可调短端梳状线滤波器（STCL）的新型反射型模拟移相器。获得了渐近逼近的360度总相移，在5 GHz的整个相移范围内，线性范围较大，插入损耗小于-1.5 dB。提出的第二种方法是一个新概念，它是可调谐的有限传输零滤波器，它利用了每个耦合不可避免的频率依赖性。为了获得这种性能，建议使用铁电或铁磁堆叠的基板来调整额外的传输零点和中心频率。

著录项

  • 作者

    Shin, Sanghoon.;

  • 作者单位

    New Jersey Institute of Technology.;

  • 授予单位 New Jersey Institute of Technology.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 89 p.
  • 总页数 89
  • 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

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