skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Full-wave analysis of superconducting microstrip lines on anisotropic substrates using equivalent surface impedance approach

Abstract

A computationally efficient full-wave technique is developed to analyze single and coupled superconducting microstrip lines on anisotropic substrates. The optic axis of the dielectric is in the plane of the substrate at an arbitrary angle with respect to the propagation direction. A dyadic Green's function for layered, anisotropic media is used to formulate an integral equation for the current in the strips. To increase the efficiency of the method, the superconducting strips are replaced by equivalent surface impedances which account for the loss and kinetic inductance of the superconductors. The validity of this equivalent surface impedance (ESI) approach is verified by comparing the calculated complex propagation constant and characteristic impedance for superconducting microstrip lines on an isotropic substrate to measured results, and to numerical results by the more rigorous volume-integral equation method. The results calculated using the ESI approach for perfectly conducting coupled lines on an anisotropic substrate agree with the results by the finite-difference time-domain method. This efficient ESI technique is then used to study the effects of the optic axis orientation and the strip width on the characteristics of single and coupled superconducting microstrip lines on M-plane sapphire. The effects of the line separation and operating temperature onmore » the coupled lines are also investigated.« less

Authors:
; ; ;  [1];  [2];  [3]
  1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Electrical Engineering and Computer Science
  2. Massachusetts Inst. of Tech., Lexington, MA (United States). Lincoln Lab.
  3. Conductus, Inc., Sunnyvale, CA (United States)
Publication Date:
OSTI Identifier:
7270500
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Microwave Theory and Techniques (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 41:12; Journal ID: ISSN 0018-9480
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; SUPERCONDUCTING DEVICES; NUMERICAL ANALYSIS; CALCULATION METHODS; DIELECTRIC PROPERTIES; MICROWAVE EQUIPMENT; PERFORMANCE; ELECTRICAL PROPERTIES; ELECTRONIC EQUIPMENT; EQUIPMENT; MATHEMATICS; PHYSICAL PROPERTIES; 665412* - Superconducting Devices- (1992-)

Citation Formats

Lee, L H, Lyons, W G, Orlando, T P, Ali, S M, Lyons, W G, and Withers, R S. Full-wave analysis of superconducting microstrip lines on anisotropic substrates using equivalent surface impedance approach. United States: N. p., 1993. Web. doi:10.1109/22.260729.
Lee, L H, Lyons, W G, Orlando, T P, Ali, S M, Lyons, W G, & Withers, R S. Full-wave analysis of superconducting microstrip lines on anisotropic substrates using equivalent surface impedance approach. United States. https://doi.org/10.1109/22.260729
Lee, L H, Lyons, W G, Orlando, T P, Ali, S M, Lyons, W G, and Withers, R S. 1993. "Full-wave analysis of superconducting microstrip lines on anisotropic substrates using equivalent surface impedance approach". United States. https://doi.org/10.1109/22.260729.
@article{osti_7270500,
title = {Full-wave analysis of superconducting microstrip lines on anisotropic substrates using equivalent surface impedance approach},
author = {Lee, L H and Lyons, W G and Orlando, T P and Ali, S M and Lyons, W G and Withers, R S},
abstractNote = {A computationally efficient full-wave technique is developed to analyze single and coupled superconducting microstrip lines on anisotropic substrates. The optic axis of the dielectric is in the plane of the substrate at an arbitrary angle with respect to the propagation direction. A dyadic Green's function for layered, anisotropic media is used to formulate an integral equation for the current in the strips. To increase the efficiency of the method, the superconducting strips are replaced by equivalent surface impedances which account for the loss and kinetic inductance of the superconductors. The validity of this equivalent surface impedance (ESI) approach is verified by comparing the calculated complex propagation constant and characteristic impedance for superconducting microstrip lines on an isotropic substrate to measured results, and to numerical results by the more rigorous volume-integral equation method. The results calculated using the ESI approach for perfectly conducting coupled lines on an anisotropic substrate agree with the results by the finite-difference time-domain method. This efficient ESI technique is then used to study the effects of the optic axis orientation and the strip width on the characteristics of single and coupled superconducting microstrip lines on M-plane sapphire. The effects of the line separation and operating temperature on the coupled lines are also investigated.},
doi = {10.1109/22.260729},
url = {https://www.osti.gov/biblio/7270500}, journal = {IEEE Transactions on Microwave Theory and Techniques (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0018-9480},
number = ,
volume = 41:12,
place = {United States},
year = {Wed Dec 01 00:00:00 EST 1993},
month = {Wed Dec 01 00:00:00 EST 1993}
}