Title :
Full-wave analysis of superconducting microstrip lines on sapphire substrates
Author :
Lee, Loo Hay ; Ali, Shaima Mohammed ; Lyons, W.G. ; Withers, R.S. ; Orlando, T.P.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
Abstract :
A computationally efficient full-wave technique is developed to analyze superconducting microstrip lines on M-plane sapphire in which the optical axis is in the plane of the substrate at an arbitrary angle with respect to the propagation direction. To increase the efficiency of the method, the superconducting strip is replaced by an equivalent surface impedance which accounts for the loss and kinetic inductance of the superconductor. The complex propagation constant and characteristic impedance are calculated. The calculated results show good agreement with previously published data and with the results of the more rigorous volume-integral-equation method.<>
Keywords :
microstrip lines; superconducting microwave devices; waveguide theory; Al/sub 2/O/sub 3/; M-plane sapphire; complex propagation constant; equivalent surface impedance; full-wave technique; kinetic inductance; optical axis; propagation direction; sapphire substrates; superconducting microstrip lines; volume-integral-equation method; Anisotropic magnetoresistance; Dielectric substrates; High temperature superconductors; Microstrip; Optical attenuators; Strips; Superconducting filters; Superconducting microwave devices; Superconducting transmission lines; Surface impedance;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276797
