Abstract:
Superconducting materials are known to exhibit nonlinear effects and to produce harmonic generation and intermodulation distortion in superconductive circuits. In planar ...Show MoreMetadata
Abstract:
Superconducting materials are known to exhibit nonlinear effects and to produce harmonic generation and intermodulation distortion in superconductive circuits. In planar structures, these nonlinearities depend on the current distribution on the strip which is mainly determined by the structure of the device. This paper investigates the current distribution at the step-in-width discontinuity in superconducting microstrip transmission lines, which is computed by a numerical approach based on a 3-D finite-element method. This current distribution is used to obtain the parameters of the nonlinear circuit model for the superconducting microstrip step-in-width discontinuity. The proposed equivalent nonlinear circuit can be solved using the harmonic balance method. Examples of two superconducting structures which contain the steps in width are given and validated by comparison with electromagnetic full-wave results. The proposed model can be used for effective optimization of the superconducting microwave filter resonators in order to minimize their nonlinear distortions.
Published in: IEEE Transactions on Applied Superconductivity ( Volume: 23, Issue: 2, April 2013)
Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
S. Mohammad Hassan Javadzadeh (S'10) was born in Mashhad, Iran, in 1984. He received the B.Sc. degree in electrical engineering from Amirkabir University of Technology, Tehran, Iran, in 2006 and the M.Sc. degree in electrical engineering from Sharif University of Technology, Tehran, in 2008, where he is currently working toward the Ph.D. degree.
For nine months during 2012, he was a Visiting Scholar with the Kavli Institut...Show More
S. Mohammad Hassan Javadzadeh (S'10) was born in Mashhad, Iran, in 1984. He received the B.Sc. degree in electrical engineering from Amirkabir University of Technology, Tehran, Iran, in 2006 and the M.Sc. degree in electrical engineering from Sharif University of Technology, Tehran, in 2008, where he is currently working toward the Ph.D. degree.
For nine months during 2012, he was a Visiting Scholar with the Kavli Institut...View more
Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
Forouhar Farzaneh (S'82–M'84–SM'96) received the B.S. degree in electrical engineering from Shiraz University, Shiraz, Iran, in 1980, the M.S. degree from the Ecole Nationale Supérieure des Télécommunications, Paris, France, in 1981, and the D.E.A. and Ph.D. degrees from the University of Limoges, Limoges, France, in 1982 and 1985, respectively.
From 1985 to 1989, he was an Assistant Professor with Tehran Polytechnic, Tehr...Show More
Forouhar Farzaneh (S'82–M'84–SM'96) received the B.S. degree in electrical engineering from Shiraz University, Shiraz, Iran, in 1980, the M.S. degree from the Ecole Nationale Supérieure des Télécommunications, Paris, France, in 1981, and the D.E.A. and Ph.D. degrees from the University of Limoges, Limoges, France, in 1982 and 1985, respectively.
From 1985 to 1989, he was an Assistant Professor with Tehran Polytechnic, Tehr...View more
Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
Mehdi Fardmanesh (SM'02) was born in Tehran, Iran, in 1961. He received the B.S. degree in electrical engineering from Tehran Polytechnic, Tehran, in 1987 and the M.S. and Ph.D. degrees in electrical engineering from Drexel University, Philadelphia, PA, in 1991 and 1993, respectively.
In 1989, he joined Drexel University, and until 1993, he conducted research in the development of thin- and thick-film high-temperature supe...Show More
Mehdi Fardmanesh (SM'02) was born in Tehran, Iran, in 1961. He received the B.S. degree in electrical engineering from Tehran Polytechnic, Tehran, in 1987 and the M.S. and Ph.D. degrees in electrical engineering from Drexel University, Philadelphia, PA, in 1991 and 1993, respectively.
In 1989, he joined Drexel University, and until 1993, he conducted research in the development of thin- and thick-film high-temperature supe...View more
Contents Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
S. Mohammad Hassan Javadzadeh (S'10) was born in Mashhad, Iran, in 1984. He received the B.Sc. degree in electrical engineering from Amirkabir University of Technology, Tehran, Iran, in 2006 and the M.Sc. degree in electrical engineering from Sharif University of Technology, Tehran, in 2008, where he is currently working toward the Ph.D. degree.
For nine months during 2012, he was a Visiting Scholar with the Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Delft, The Netherlands. He is a Member of the Superconductor Electronics Research Laboratory, Department of Electrical Engineering, Sharif University of Technology. His research interests include design and fabrication of passive and active microwave devices, antenna engineering, superconducting microwave devices, and modeling of nonlinearity in superconductive structures.
S. Mohammad Hassan Javadzadeh (S'10) was born in Mashhad, Iran, in 1984. He received the B.Sc. degree in electrical engineering from Amirkabir University of Technology, Tehran, Iran, in 2006 and the M.Sc. degree in electrical engineering from Sharif University of Technology, Tehran, in 2008, where he is currently working toward the Ph.D. degree.
For nine months during 2012, he was a Visiting Scholar with the Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Delft, The Netherlands. He is a Member of the Superconductor Electronics Research Laboratory, Department of Electrical Engineering, Sharif University of Technology. His research interests include design and fabrication of passive and active microwave devices, antenna engineering, superconducting microwave devices, and modeling of nonlinearity in superconductive structures.View more
Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
Forouhar Farzaneh (S'82–M'84–SM'96) received the B.S. degree in electrical engineering from Shiraz University, Shiraz, Iran, in 1980, the M.S. degree from the Ecole Nationale Supérieure des Télécommunications, Paris, France, in 1981, and the D.E.A. and Ph.D. degrees from the University of Limoges, Limoges, France, in 1982 and 1985, respectively.
From 1985 to 1989, he was an Assistant Professor with Tehran Polytechnic, Tehran, Iran. Since 1989, he has been with Sharif University of Technology, Tehran, where he is currently a Professor of electrical engineering. He has authored or coauthored numerous journal and conference papers in the field of microwave and millimeter-wave circuits. He has also authored a book (in Persian) about radio-frequency circuit design. His main areas of interest are nonlinear microwave circuits and numerical methods associated with their analysis.
Dr. Farzaneh was a corecipient of the 1985 European Microwave Prize. He was also the recipient of the Maxwell Premium Award presented at the 2001 IEE Microwaves, Antennas and Propagation Proceedings.
Forouhar Farzaneh (S'82–M'84–SM'96) received the B.S. degree in electrical engineering from Shiraz University, Shiraz, Iran, in 1980, the M.S. degree from the Ecole Nationale Supérieure des Télécommunications, Paris, France, in 1981, and the D.E.A. and Ph.D. degrees from the University of Limoges, Limoges, France, in 1982 and 1985, respectively.
From 1985 to 1989, he was an Assistant Professor with Tehran Polytechnic, Tehran, Iran. Since 1989, he has been with Sharif University of Technology, Tehran, where he is currently a Professor of electrical engineering. He has authored or coauthored numerous journal and conference papers in the field of microwave and millimeter-wave circuits. He has also authored a book (in Persian) about radio-frequency circuit design. His main areas of interest are nonlinear microwave circuits and numerical methods associated with their analysis.
Dr. Farzaneh was a corecipient of the 1985 European Microwave Prize. He was also the recipient of the Maxwell Premium Award presented at the 2001 IEE Microwaves, Antennas and Propagation Proceedings.View more
Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran
Mehdi Fardmanesh (SM'02) was born in Tehran, Iran, in 1961. He received the B.S. degree in electrical engineering from Tehran Polytechnic, Tehran, in 1987 and the M.S. and Ph.D. degrees in electrical engineering from Drexel University, Philadelphia, PA, in 1991 and 1993, respectively.
In 1989, he joined Drexel University, and until 1993, he conducted research in the development of thin- and thick-film high-temperature superconducting materials and devices and the development of ultralow-noise cryogenic characterization systems, where he was awarded a research fellowship by the Ben Franklin Superconductivity Center in 1989. From 1994 to 1996, he was the Principal Manager for R&D and the Director of a private-sector research electrophysics laboratory while also teaching in the Department of Electrical Engineering and the Department of Physics, Sharif University of Technology, Tehran. In 1996, he joined the Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, where he teaches in the area of solid-state electronics while also supervising the Superconductivity Research Laboratory. In 1998 and 1999, he was invited to the Institute of Bio- and Nanosystems, Jülich Research Centre, Jülich, Germany, where he pursued the development of low-noise high- T_{c} radio-frequency superconducting quantum interference device (SQUID)-based magnetic sensors. In 2000, he established an international collaboration between Bilkent University and the Jülich Research Centre in the field of superconductivity. From 2000 to 2004, he was the Director of the joint project for the development of a high-resolution high-T_{c} SQUID-based magnetic imaging system. Since 2000, he has been reestablishing his activities with the Department of Electrical Engineering, Sharif University of Technology, where he is currently the Head of the Branch of Electronics. In 2003, he set up the Superconductor Electronics Research Laboratory, Department of Electrical Engineering, Sharif University of Technology, where he has been the Director since then. His research interests mainly include the design, fabrication, and modeling of high-temperature superconducting devices and circuits such as bolometers, microwave filters, and resonators, Josephson junctions, and SQUID-based systems, in the areas of which he is the holder of several international patents.
Mehdi Fardmanesh (SM'02) was born in Tehran, Iran, in 1961. He received the B.S. degree in electrical engineering from Tehran Polytechnic, Tehran, in 1987 and the M.S. and Ph.D. degrees in electrical engineering from Drexel University, Philadelphia, PA, in 1991 and 1993, respectively.
In 1989, he joined Drexel University, and until 1993, he conducted research in the development of thin- and thick-film high-temperature superconducting materials and devices and the development of ultralow-noise cryogenic characterization systems, where he was awarded a research fellowship by the Ben Franklin Superconductivity Center in 1989. From 1994 to 1996, he was the Principal Manager for R&D and the Director of a private-sector research electrophysics laboratory while also teaching in the Department of Electrical Engineering and the Department of Physics, Sharif University of Technology, Tehran. In 1996, he joined the Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, where he teaches in the area of solid-state electronics while also supervising the Superconductivity Research Laboratory. In 1998 and 1999, he was invited to the Institute of Bio- and Nanosystems, Jülich Research Centre, Jülich, Germany, where he pursued the development of low-noise high- T_{c} radio-frequency superconducting quantum interference device (SQUID)-based magnetic sensors. In 2000, he established an international collaboration between Bilkent University and the Jülich Research Centre in the field of superconductivity. From 2000 to 2004, he was the Director of the joint project for the development of a high-resolution high-T_{c} SQUID-based magnetic imaging system. Since 2000, he has been reestablishing his activities with the Department of Electrical Engineering, Sharif University of Technology, where he is currently the Head of the Branch of Electronics. In 2003, he set up the Superconductor Electronics Research Laboratory, Department of Electrical Engineering, Sharif University of Technology, where he has been the Director since then. His research interests mainly include the design, fabrication, and modeling of high-temperature superconducting devices and circuits such as bolometers, microwave filters, and resonators, Josephson junctions, and SQUID-based systems, in the areas of which he is the holder of several international patents.View more
