Modeling of planar quasi-TEM superconducting transmission lines
Abstract
An application of the phenomenological loss equivalence method (Lee and Itoh, 1989) in modeling the microwave behavior of planar quasi-TEM superconducting transmission lines is presented. For validation of the model, data are used from measurements of a YBCO superconducting thin-film coplanar-waveguide lowpass filter on a lanthanum aluminate substrate. Measured and modeled S-parameters of an existing superconducting coplanar waveguide lowpass filter agree to within 0.3 dB in magnitude and 0.5 radians in phase. Extracted values for penetration depth and real part of the conductivity of the superconducting film are within 10 percent of other researchers' findings.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- June 1992
- DOI:
- 10.1109/22.141344
- Bibcode:
- 1992ITMTT..40.1128A
- Keywords:
-
- High Temperature Superconductors;
- Microwave Circuits;
- Superconducting Films;
- Transmission Lines;
- Bcs Theory;
- Low Pass Filters;
- Mathematical Models;
- Electronics and Electrical Engineering