SUPERCONDUCTING MICROSTRIP LINE MODEL STUDIES AT MILLIMETRE AND SUB-MILLIMETRE WAVES |
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Authors: | V Belitsky C Risacher M Pantaleev and V Vassilev |
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Institution: | (1) Group for Advanced Receiver Development (GARD) Radio & Space Science Department with Onsala Space Observatory, Chalmers University of Technology, Gothenburg, Sweden |
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Abstract: | This paper presents results of superconducting microstrip transmission line simulation for the frequency range 100–1100 GHz.
The simulation is used to calculate the characteristic impedance and the wave propagation constant in a superconducting microstrip
line having different geometry. Indeed, modelling provides the only tool for designing superconducting microstrip-based circuits
at millimetre and sub-millimetre wavelengths because no direct measurements of such a line can be made at this wavelengths
and at cryogenic temperature of 4 K with ultimate accuracy. Niobium, as the most commonly exploited superconducting material,
was used for the modelling, though the same approach would work for any different BCS superconductor. In order to evaluate
the model accuracy, we have made an extensive comparison study of the superconducting microstrip models known from earlier
publications, performed numerical simulations using 3D EM — solver, HFSS, and used a new model introduced in this paper with
all simulation result plotted in the paper. |
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Keywords: | Superconducting microstrip line characteristic impedance propagation constant |
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