Wang, Yi, Su, Hieng Tiong, Huang, Frederick and Lancaster, Michael J. (2005) Wide-band superconducting coplanar delay lines. Microwave Theory and Techniques, IEEE Transactions on, 53 (7). pp. 2348-2354. ISSN 0018-9480 (doi:10.1109/TMTT.2005.850436)

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Abstract

Two 25-ns high-temperature superconductor delay lines with novel double-spiral meander line structures were fabricated and measured, one based on the conventional coplanar waveguide (CPW) and the other based on the conductor-backed CPW. Compared with other published studies, the performance of the Conductor-backed CPW delay line is among the best in terms of the widest resonance-free band (2-18 GHz), low insertion loss (0.06 dB/ns at 60 K and 10 GHz), small ripple (<1 dB up until 16 GHz), and small dispersion (<2 ns in the variation of group delay between 2-18 GHz). This is also the first coplanar delay line successfully demonstrated without using wire bonding. The reflecting elements in the delay lines were identified through time-domain measurements. Full-wave simulations were performed to compare the double-spiral meander-line structure with conventional double-spiral line, and to identify the geometric factors restricting the bandwidth of the double-spiral meander line.

Item Type:	Article
Additional Information:	[1] Journal has other title: IEEE Transactions on Microwave Theory and Techniques. [2] Date of current version: 11 July 2005.
Uncontrolled Keywords:	coplanar transmission lines, delay lines, high-temperature superconductors (HTSs), modeling,
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:	Publisher
Last Modified:	14 Oct 2016 09:24
URI:	http://gala.gre.ac.uk/id/eprint/9720

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