Analysis of Superconducting Microwave Transmission Lines (REU SUPPLEMENT)

超导微波传输线分析（REU 补充）

• 批准号: 9108933
• 负责人: Samir El-Ghazaly
• 金额: $ 7万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-15 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9108933&HistoricalAwards=false
• 关键词: Analysis; Superconducting; Microwave; Transmission; Lines

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.

对于高速数字和高频模拟应用，将高TC超导（HTS）材料纳入平面传输线非常有前途。 在完全剥削HTS之前，需要评估其当前和功率处理能力。 了解材料临界电流密度不会直接导致传输线可以携带的最大电流。 在本研究启动奖中，伦敦的方程式和两流体模型将用于调查HTS传输线上的当前分布。 它们将与两个电磁模型之一相结合。 首先是全波分析。 使用有限差分方案在二维网格中在结构横截面上离散开发的方程式。 可以计算HTS微带线的总电流，而无需超过材料的临界电流密度以及总功率。 直接获得了由于正常电子和Q因子而导致的损失。 我们已经进行了初步计算，并且初步结果非常令人鼓舞。 我们在这里建议通过结合底物损耗和非线性电导率来充分开发模型。 然后，全面开发的模型将用于HTS微带线的全面分析。 将制定微波超导平面传输线的设计指南。 将进行不同平面传输线之间的比较研究，以选择完全利用HTS功能的最佳结构。