Analysis of Superconducting Microwave Transmission Lines (REU SUPPLEMENT)

消除高Tc 超导（HTS）材料 平面传输线是非常 对于高速数字来说， 高频模拟 应用. 在充分 开发HTS， 电流和功率处理 需要评估能力。 了解材料的重要性 电流密度不直接 导致最大电流， 由输电线路承载。 在这个研究启动奖， 伦敦方程与双流体 模型将用于调查 高温超导体上的电流分布 输电线路 他们将 再加上两个之一 电磁模型。 第一 这是一个全波分析。 的 对方程进行离散化， 在结构横截面上， 一个二维网格， 有限差分格式 总 高温超导微带载流 不超过临界线 材料的电流密度为 以及总功率可以是 计算了 所致损失 正常电子和Q因子 直接获得。 我们有 已执行初始 计算和初步的 结果令人鼓舞。 我们 在此建议充分发展 结合衬底模型 损耗和非线性导电性。 然后，完全开发的模型 将用于全面 高温超导微带线分析 微波设计导则 超导平面传输 线将被开发。 不同的比较研究 平面传输线将是 选出最好的 充分利用HTS的结构 能力的

Incorporating High Tc Superconducting (HTS) materials in planar transmission lines is very promising for high speed digital, and high frequency analog applications. Before full exploitation of the HTS's, their current and power handling capacities need to be assessed. Knowing the material critical current density does not directly lead to the maximum current that can be carried by the transmission line. In this Research Initiation Award, London's equations and the two-fluid model will be used to investigate the current distributions on HTS transmission lines. They will be coupled with one of two electromagnetic models. The first on is a full-wave analysis. The developed equations are discretized over the structure cross-section in a two dimensional mesh using the finite-difference scheme. The total current carried by an HTS microstrip line without exceeding the critical current density of the material as well as the total power can be calculated. The losses due to normal electrons and the Q-factor are directly obtained. We have already performed initial calculations, and the preliminary results are very encouraging. We here propose to fully develop the model by incorporating substrate losses and non-linear conductivity. Then, the fully developed models will be used for comprehensive analysis of HTS microstrip lines. Design guidelines for microwave superconducting planar transmission lines will be developed. Comparative study between different planar transmission lines will be performed to select the best structure that fully exploits HTS capabilities.