TITLE

# Input impedance and gain of a gigahertz amplifier using a dc superconducting quantum interference device in a quarter wave resonator

AUTHOR(S)
Spietz, Lafe; Irwin, Kent; Aumentado, José
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/25/2008, Vol. 93 Issue 8, p082506
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
Due to their superior noise performance, superconducting quantum interference devices (SQUIDs) are an attractive alternative to high electron mobility transistors for constructing ultra-low-noise microwave amplifiers for cryogenic use. We describe the use of a lumped element SQUID inductively coupled to a quarter wave resonator. The resonator acts as an impedance transformer and also makes it possible to accurately measure the input impedance and intrinsic microwave characteristics of the SQUID. We present a model for input impedance and gain, compare it to the measured scattering parameters, and describe how to use the model for the systematic design of low-noise microwave amplifiers with a wide range of performance characteristics.
ACCESSION #
34198768

## Related Articles

• Using SQUIDs to Detect Charge in Cryogenic Germanium Detectors. Moffatt, R.; Cabrera, B.; Kadribasic, F.; Pyle, M.; Wesenberg, D.; Yen, J.; Young, B. // Journal of Low Temperature Physics;Jun2012, Vol. 167 Issue 5/6, p638

This paper describes an impedance matching network which allows charge impulses to be measured by a SQUID amplifier with an RMS charge noise of less than 100 e, assuming the SQUID amplifier has a current noise of 2 $\mathrm{pA}/\sqrt{\mathrm{Hz}}$, and the current pulse has a duration of about 1...

• Cryogenic Integrated Offset Compensation for Time Domain SQUID Multiplexing. Prêle, D.; Voisin, F.; Martino, J.; Bréelle, E.; Bordier, G.; Piat, M. // Journal of Low Temperature Physics;Jun2012, Vol. 167 Issue 5/6, p726

Superconducting QUantum Interference Device (SQUID) multiplexing is a common technique in the use of large arrays of Transition Edge Sensors (TES). A Time Domain Multiplexer (TDM) combines input TES signals into one output signal using several SQUIDs. Different TES, SQUID and amplifier...

• An X-band SQUID Multiplexer. Hahn, I.; Bumble, B.; LeDuc, H. G.; Weilert, M.; Day, P. // AIP Conference Proceedings;2006, Vol. 850 Issue 1, p1613

We are developing a microwave readout multiplexer for arrays of superconducting quantum interference devices (SQUIDs). A series of microwave resonators with frequencies âˆ¼10 GHz are each loaded by a dc SQUID to a degree that depends on the flux state of the SQUID. By using resonators with...

• Tuning the field in a microwave resonator faster than the photon lifetime. Sandberg, M.; Wilson, C. M.; Persson, F.; Bauch, T.; Johansson, G.; Shumeiko, V.; Duty, T.; Delsing, P. // Applied Physics Letters;5/19/2008, Vol. 92 Issue 20, p203501

We have fabricated and characterized tunable superconducting transmission line resonators. To change the resonance frequency, we modify the boundary condition at one end of the resonator through the tunable Josephson inductance of a superconducting quantum interference device. We demonstrate a...

• A superconducting quantum interference device based read-out of a subattonewton force sensor operating at millikelvin temperatures. Usenko, O.; Vinante, A.; Wijts, G.; Oosterkamp, T. H. // Applied Physics Letters;3/28/2011, Vol. 98 Issue 13, p133105

We present a scheme to measure the displacement of a nanomechanical resonator at cryogenic temperature. The technique is based on the use of a superconducting quantum interference device to detect the magnetic flux change induced by a magnetized particle attached on the end of the resonator....

• Flux-driven Josephson parametric amplifier. Yamamoto, T.; Inomata, K.; Watanabe, M.; Matsuba, K.; Miyazaki, T.; Oliver, W. D.; Nakamura, Y.; Tsai, J. S. // Applied Physics Letters;7/28/2008, Vol. 93 Issue 4, p042510

We have developed a Josephson parametric amplifier comprising a superconducting coplanar-waveguide resonator terminated by a dc superconducting quantum interference device (SQUID). An external field (the pump, âˆ¼20 GHz) modulates the flux threading of the dc SQUID and, therefore, the...

• Analysis of effective coupling strength in high-frequency SQUIDs. Gottschlich, M.; Sodtke, E.; Zhang, Y.; Portis, A. M. // Journal of Applied Physics;11/15/1995, Vol. 78 Issue 10, p6276

Focuses on a study which investigated two kinds of planar microstrip tank circuit resonators in high-frequency superconducting quantum interference device (SQUID). Lumped element representation of the effective SQUID-resonator coupling; Disadvantage of S-resonator SQUID; Current distribution in...

• Numerical modeling of superconducting coplanar resonators for radio frequency superconducting quantum interference devices. Yi, H. R.; Zhang, Y.; Braginski, A. I. // Applied Physics Letters;10/19/1998, Vol. 73 Issue 16

We have simulated the superconducting coplanar resonators of different designs that we have fabricated and tested as the tank circuit of radio frequency superconducting quantum interference devices. The coplanar resonator is formed by two microstrip lines surrounding a flux concentrator with...

• 27 h SQUID amplifier operating with high-Q resonant input load. Falferi, Paolo; Bonaldi, Michele; Cerdonio, Massimo; Vinante, Andrea; Mezzena, Renato; Prodi, Giovanni Andrea; Vitale, Stefano // Applied Physics Letters;2/6/2006, Vol. 88 Issue 6, p062505

We have extended to ultracryogenic temperatures the complete noise characterization of a low-noise two-stage superconducting quantum interference device (SQUID) amplifier developed for resonant gravitational wave detectors. The additive current noise is evaluated from open input measurements. To...

Share