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Proceedings Paper

Development of high-temperature superconducting 100-ns delay line
Author(s): Neal Fenzi; David Aidnik; David Skoglund; Steve Rohlfing
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Paper Abstract

Two 100 nanosecond long delay lines have been built. Bandwidths of up to 7 GHz have been demonstrated, with insertion losses of less than 0.08 dB/nanosecond at 6 GHz. Each 100 nanosecond long delay line is contained in a package less than 4 inches by 4 inches by 0.5 inch. The delay lines use a meandered coplanar waveguide line built on a simple, easy to model unit cell. Coupling within individual cells was modeled using `Tranline,' a 2D EM simulator. Cell-to-cell interactions were modeled using NODAL, an in-house simulator that allows for coupling between non-adjacent lines. In the design of the unit cell and the layout of cells on the wafer, there is a tradeoff between coupling and delay density affecting size and performance. Since these delay lines are passive and patterned using photo-lithographic techniques, they exhibit good unit-to-unit phase repeatability. Phase repeatability is of particular interest in applications where multiple signal paths need to have the same transfer characteristics. Data on phase matching is shown between two 100 nanosecond long assemblies.

Paper Details

Date Published: 4 January 1994
PDF: 9 pages
Proc. SPIE 2156, High Tc Microwave Superconductors and Applications, (4 January 1994); doi: 10.1117/12.166151
Show Author Affiliations
Neal Fenzi, Superconductor Technologies Inc. (United States)
David Aidnik, Superconductor Technologies Inc. (United States)
David Skoglund, Superconductor Technologies Inc. (United States)
Steve Rohlfing, Superconductor Technologies Inc. (United States)

Published in SPIE Proceedings Vol. 2156:
High Tc Microwave Superconductors and Applications
Robert B. Hammond; Richard S. Withers, Editor(s)

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