Open AccessAnalytical distributed non‐linear model for symmetric and asymmetric superconducting parallel‐coupled microstrip lines
Author(s) -
Javadzadeh Seyed Mohammad Hassan,
Farzaneh Forouhar,
Fardmanesh Mehdi
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2013.0150
Subject(s) - microstrip , intermodulation , harmonic balance , topology (electrical circuits) , finite element method , superconductivity , linearity , resonator , electronic engineering , physics , computational physics , mathematical analysis , nonlinear system , mathematics , optoelectronics , electrical engineering , engineering , condensed matter physics , amplifier , cmos , quantum mechanics , thermodynamics
Superconducting materials are known to produce intermodulation distortion and other non‐linear effects. In microstrip structures, the non‐linearity depends on the current distribution on the strip which is mainly determined by the geometrical structure of the device. The current distribution in superconducting parallel‐coupled microstrip lines is computed by a numerical approach based on a three‐dimensional finite element method. This computed current distribution is used to produce a non‐linear circuit model for parallel‐coupled superconducting lines. A numerical technique based on the harmonic balance approach is used for non‐linear analysis of the proposed equivalent circuit. To validate the accuracy of the proposed model, the results of analysis of hairpin resonator superconducting band pass filters are compared with measured results. This proposed technique is useful for fast and efficient non‐linear analysis of the superconducting microstrip coupled lines.