Analysis of Nonuniform Superconducting Transmission Lines and Microstrips in Microwave Regime

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Monem Haghdoust, Zahra | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40315 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Mehrany, Khashayar; Fardmanesh, Mehdi
Abstract:
Nonuniform superconducting microstrip transmission lines in microwave regime have been investigated. Nonuniform transmission lines provide the capability of controlling line parameters. Photonic structures with subwavelength features can be homogenized and thus be accurately approximated by homogeneous yet spatially dispersive structures. This idea is here applied to nonuniform superconducting transmission lines with subwavelength nonuniformities, i.e. subcentimeter features in the microwave regime. This modelling is quite useful in geometrical and optical control of quasi-TEM wave propagation and dispersion engineering along microwave superconducting lines. This approach has applications such as adiabatic variation of group velocity, field enhancement and pulse shape constructing. The results are verified by the exact numerical solution of the telegrapher's equations governing the quasi-TEM wave propagation, and full wave analysis.
Keywords:
Superconductivity ; Microstrip Transmission Line ; Nonuniform Transmission Line ; Telegrapher's Equation ; Quasi-Transverse Electromagnetics Waves (Quasi-TEM) ; Group Velocity

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