Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

IEEE Transactions on Applied Superconductivity

A 4 bit instantaneous frequency meter at 10 GHz with coplanar YBCO delay lines

M. Biehl, A. Vogt, R. Herwig, M. Neuhaus, E. Crocoll, R. Lochschmied, Theo Andreas Scherer, W. Jutzi, Henrik Kratz, Paul Berberich, H. Kinder

Published Jun 1, 1995• 26 citations
Publisher

Abstract

A device on a single 2"-LaAlO/sub 3/ wafer for a four bit instantaneous frequency measurement between 9.5 GHz and 10.5 GHz has been developed with coplanar YB/sub 2/Cu/sub 3/O/sub 7-/spl delta// delay lines and power dividers. Compared to known triplate strip lines, coplanar delay lines are easier to fabricate monolithically and allow for a greater flexibility in the circuit design. Simulated and measured results are in good agreement.>

DOI
10.1109/77.403040

Related papers

Forty five nanoseconds superconducting delay lines

Gert K. G. Hohenwarter, Elie K. Track, R.E. Drake +1 more

The authors report on the design, simulation, fabrication, and measurement of very long superconducting coplanar waveguide delay lines on 3-in-diameter LaAlO/sub 3/ substrates. Variations of the design involving the addition of a ground plane on the backside of the substrate and for the use of gold wire-bond bridges to electrically connect the in-plane ground planes were investigated. A delay of 45 ns was measured for a line length of 4.3 m. The best response was obtained with wire-bond connections and no backside ground plane. A resonance-free insertion loss of less than 0.01 dB/ns was obtained with a 1.7-GHz bandwidth for NbN at 4.2 K. This is to be compared with a loss of 0.1 dB/ns for a 50-ns 0.141-in OD. (outer diameter) copper coaxial delay line that weighs 1.5 lb and 0.02 dB/ns for a 60-ns 1-in OD copper coaxial delay line that weighs 45 lb.>

IEEE Transactions on Applied Superconductivity•Mar 1, 1993•19 citations

Propagation characteristics of monolithic YBaCuO coplanar strip transmission lines fabricated by laser-writing patterning technique

Win Naing Maung, Donald P. Butler, W. Xiong +2 more

We report our studies on the propagation characteristics of YBa/sub 2/Cu/sub 3/O/sub 7/-on-LaAlO/sub 3/ superconducting coplanar strip transmission lines and resonators fabricated with a novel laser-writing patterning technique. The measurements were performed in the 0.1 to 15 GHz frequency range at temperatures between 300 and 24 K. We show that at temperatures below the superconducting critical temperature, the S/sub 21/ parameter of our transmission lines was close to 0 dB at all the frequencies, while the Q-factor of the resonator structure was as high as 5000 at 6 GHz and 24 K. The transmission line propagation velocity was about 10/sup 8/ cm/s. Our results indicate that the laser-writing patterning technique can be effectively used to fabricate high-quality superconducting microwave elements and circuits.>

IEEE Microwave and Guided Wave Letters•May 1, 1994•3 citations

Experimental Characterization of Optically Tunable High-Temperature Superconducting Microwave Resonators and Delay Lines

Haig A. Atikian, Behnood G. Ghamsari, A. Hamed Majedi

This paper reports the design, fabrication, and measurements of optically tunable superconducting microwave resonators and delay lines. The devices are comprised of superconducting coplanar waveguide (CPW) transmission lines fabricated from a 100 nm-thick YBCO film, interrupted by 3- and 5-m YBCO meander structures of the same thickness on top of an LAO substrate. The CPW is tested at 77 K up to a frequency of 50 GHz, where it exhibits a transmission loss of about 0.12 dB/mm. The measurements are done in a cryogenic microwave probe station, where all the calibrations have been performed at 77 K. It has been observed that the resonance frequencies of the superconducting resonators can be changed by more than 2 GHz under the optical illumination at a wavelength of 1550 nm. The delay lines also exhibit a phase retardation of up to 90 at the same operating conditions.

IEEE Transactions on Microwave Theory and Techniques•Oct 27, 2010•13 citations

Scattering parameter and bit error rate characterization of high temperature superconducting coplanar transmission lines

J. Kruse, W.H. Chang, D.R. Scherrer +5 more

We report the gigahertz experimental results of time and frequency performance on YBCO high temperature superconductor (HTS) and gold coplanar transmission lines. An on-wafer direct probing measurement system was used to collect data at cryogenic temperatures on both YBCO and gold coplanar lines. The insertion loss of the 6-cm lines at a frequency of 3.0 GHz was measured to be -0.12 dB for the superconducting line compared to -10.7 dB for the gold line at 80 K. Error rate and eye-diagram measurements were performed on the packaged lines and show the correlation between the insertion loss of the line and the attenuation of a Pseudo Random Bit Sequence (PBRS). The superconducting line measured at 77 K had a BER rate of less than 10/sup -11/ at a data rate of 3 Gb/s. The measured eye height was 350 mV for the YBCO compared to 100 mV for a gold line at 3 Gb/s and a temperature of 77 K for the packaged 6-cm lines.

IEEE Transactions on Applied Superconductivity•Jan 1, 1995•0 citations

RF characterization of Josephson flux-flow transistors: design, modeling, and on-wafer measurement

Y.M. Zhang, E. Carlsson, Dag Winkler +3 more

Josephson flux-flow transistors based on 0-32/spl deg/ [001]-tilt YBa/sub 2/Cu/sub 3/O/sub 7/ bicrystal junctions have been fabricated with Au loops as the control current lines. In order to measure the S-parameters of the transistors, no matching elements are implemented and 50 Omega coplanar lines are used as the input and output ends of the transistors. The rf properties of the transistors have been modeled on an HP microwave CAD design system, with the junction parameters taken from our dc measurements. Simulations indicate that the transistors can have a maximum stable gain of 20 dB at 7 GHz and 6 dB around 35 GHz under matched conditions. An 'on-wafer' transmission-reflection-load (TRL) method is used for calibrating the S-parameters of the transistor. A low temperature microwave probe station has been built: a pair of microwave probes inside a cryostat are moveable in the xyz-directions. Together with a Wiltron 360B vector network analyzer, this setup provides a convenient way for doing on-wafer characterization of the transistors in the frequency range from 40 MHz to 60 GHz, and in the temperature range from 20 to 80 K.>

IEEE Transactions on Applied Superconductivity•Jun 1, 1995•7 citations

Superconductive digital instantaneous frequency-measurement subsystem

Guo‐Chun Liang, C. F. Shih, R.S. Withers +3 more

A five-bit high-temperature-superconductive digital instantaneous frequency-measurement (DIFM) subsystem has been constructed for the determination of the frequency of unknown signals over a 500 MHz bandwidth, centered on 4 GHz, with a resolution of +/- 7.8 MHz. The subsystem contains a cryogenic section with five discriminator modules utilizing superconductive delay lines, GaAs mixers, and power dividers. With a single-tone cw input between -40 dBm and +10 dBm, the frequency quantization boundaries of the subsystem are, on average, 3.1 MHz from their design values. This system demonstrates the potential system-level application of high-temperature superconductive electronics in instrumentation, communication, radar, and electronic warfare.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jan 4, 1994•1 citation
A device on a single 2"-LaAlO/sub 3/ wafer for a four bit instantaneous frequency measurement between 9.5 GHz and 10.5 GHz has been developed with coplanar YB/sub 2/Cu/sub 3/O/sub 7-/spl delta// delay lines and power dividers. Compared to known triplate strip lines, coplanar delay lines are easier to fabricate monolithically and allow for a greater flexibility in the circuit design. Simulated and measured results are in good agreement.>
The authors report on the design, simulation, fabrication, and measurement of very long superconducting coplanar waveguide delay lines on 3-in-diameter LaAlO/sub 3/ substrates. Variations of the design involving the addition of a ground plane on the backside of the substrate and for the use of gold wire-bond bridges to electrically connect the in-plane ground planes were investigated. A delay of 45 ns was measured for a line length of 4.3 m. The best response was obtained with wire-bond connections and no backside ground plane. A resonance-free insertion loss of less than 0.01 dB/ns was obtained with a 1.7-GHz bandwidth for NbN at 4.2 K. This is to be compared with a loss of 0.1 dB/ns for a 50-ns 0.141-in OD. (outer diameter) copper coaxial delay line that weighs 1.5 lb and 0.02 dB/ns for a 60-ns 1-in OD copper coaxial delay line that weighs 45 lb.>
We report our studies on the propagation characteristics of YBa/sub 2/Cu/sub 3/O/sub 7/-on-LaAlO/sub 3/ superconducting coplanar strip transmission lines and resonators fabricated with a novel laser-writing patterning technique. The measurements were performed in the 0.1 to 15 GHz frequency range at temperatures between 300 and 24 K. We show that at temperatures below the superconducting critical temperature, the S/sub 21/ parameter of our transmission lines was close to 0 dB at all the frequencies, while the Q-factor of the resonator structure was as high as 5000 at 6 GHz and 24 K. The transmission line propagation velocity was about 10/sup 8/ cm/s. Our results indicate that the laser-writing patterning technique can be effectively used to fabricate high-quality superconducting microwave elements and circuits.>
This paper reports the design, fabrication, and measurements of optically tunable superconducting microwave resonators and delay lines. The devices are comprised of superconducting coplanar waveguide (CPW) transmission lines fabricated from a 100 nm-thick YBCO film, interrupted by 3- and 5-m YBCO meander structures of the same thickness on top of an LAO substrate. The CPW is tested at 77 K up to a frequency of 50 GHz, where it exhibits a transmission loss of about 0.12 dB/mm. The measurements are done in a cryogenic microwave probe station, where all the calibrations have been performed at 77 K. It has been observed that the resonance frequencies of the superconducting resonators can be changed by more than 2 GHz under the optical illumination at a wavelength of 1550 nm. The delay lines also exhibit a phase retardation of up to 90 at the same operating conditions.
We report the gigahertz experimental results of time and frequency performance on YBCO high temperature superconductor (HTS) and gold coplanar transmission lines. An on-wafer direct probing measurement system was used to collect data at cryogenic temperatures on both YBCO and gold coplanar lines. The insertion loss of the 6-cm lines at a frequency of 3.0 GHz was measured to be -0.12 dB for the superconducting line compared to -10.7 dB for the gold line at 80 K. Error rate and eye-diagram measurements were performed on the packaged lines and show the correlation between the insertion loss of the line and the attenuation of a Pseudo Random Bit Sequence (PBRS). The superconducting line measured at 77 K had a BER rate of less than 10/sup -11/ at a data rate of 3 Gb/s. The measured eye height was 350 mV for the YBCO compared to 100 mV for a gold line at 3 Gb/s and a temperature of 77 K for the packaged 6-cm lines.
Josephson flux-flow transistors based on 0-32/spl deg/ [001]-tilt YBa/sub 2/Cu/sub 3/O/sub 7/ bicrystal junctions have been fabricated with Au loops as the control current lines. In order to measure the S-parameters of the transistors, no matching elements are implemented and 50 Omega coplanar lines are used as the input and output ends of the transistors. The rf properties of the transistors have been modeled on an HP microwave CAD design system, with the junction parameters taken from our dc measurements. Simulations indicate that the transistors can have a maximum stable gain of 20 dB at 7 GHz and 6 dB around 35 GHz under matched conditions. An 'on-wafer' transmission-reflection-load (TRL) method is used for calibrating the S-parameters of the transistor. A low temperature microwave probe station has been built: a pair of microwave probes inside a cryostat are moveable in the xyz-directions. Together with a Wiltron 360B vector network analyzer, this setup provides a convenient way for doing on-wafer characterization of the transistors in the frequency range from 40 MHz to 60 GHz, and in the temperature range from 20 to 80 K.>
A five-bit high-temperature-superconductive digital instantaneous frequency-measurement (DIFM) subsystem has been constructed for the determination of the frequency of unknown signals over a 500 MHz bandwidth, centered on 4 GHz, with a resolution of +/- 7.8 MHz. The subsystem contains a cryogenic section with five discriminator modules utilizing superconductive delay lines, GaAs mixers, and power dividers. With a single-tone cw input between -40 dBm and +10 dBm, the frequency quantization boundaries of the subsystem are, on average, 3.1 MHz from their design values. This system demonstrates the potential system-level application of high-temperature superconductive electronics in instrumentation, communication, radar, and electronic warfare.