Superconductive delay-line technology and applications

Conference · Fri Mar 01 04:00:00 EST 1985 · IEEE Trans. Magn.; (United States)

OSTI ID:6346606

Withers, R S; Anderson, A C; Green, J B; Reible, S A

Microwave analog signal-processing filters have been realized in the form of coupled niobium striplines on silicon dielectric substrates. Device responses with + or - 2-dB amplitude accuracy and 9/sup 0/ -rms phase error have been achieved in amplitude-weighted filters with 37.5 ns of dispersion and 2.3-GHz bandwidths. Relative side-lobe levels of -26 dB and less are currently obtained. The achievable dispersion for stripline circuits on a single pair of 5-cm-diameter, 125-..mu..m-thick wafers is limited to about 40 ns by the electromagnetic coupling between neighboring lines. To achieve greater dispersion two approaches are under development: Stripline circuits are being fabricated on multiple wafer pairs which are physically stacked and electrically concatenated to produce dispersive delay lines with 4-GHz bandwidth and 75-ns dispersion time. Phenolic resin is used as an adhesive to ensure the mechanical integrity of the stacked structure. (2) A technique to fabricate dense stripline circuits on very thin (15-..mu..m) single-crystal silicon superstrates supported by thicker substrates has been demonstrated and preliminary results will be described. A chirp-transform system capable of real-time spectral analysis has been constructed using a pair of the superconductive delay-line filters. A resolution of 43 MHz over an unprecedented 2400-MHz bandwidth with amplitude uniformity of + or - 1 dB and side-lobe levels of -18 dB was demonstrated.

• Research Organization: Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA
• OSTI ID: 6346606
• Report Number(s): CONF-840937-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-21:2
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
AMPLITUDES
ANALOG SYSTEMS
COMPOSITE MATERIALS
DATA PROCESSING
ELECTRONIC CIRCUITS
ELEMENTS
ERRORS
FABRICATION
MATERIALS
METALS
NIOBIUM
PROCESSING
SEMIMETALS
SILICON
SUPERCONDUCTING COMPOSITES
TRANSITION ELEMENTS