DC SQUIDs as radiofrequency amplifiers

Hilbert, Claude; Clarke, John

doi:10.1007/bf00681635

Cited by 99 publications

(40 citation statements)

References 18 publications

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“…Over recent years, the de SQUID has been developed as a low noise amplifier for frequencies up to 100 MHz or more 77 • To understand the theory for the performance of this amplifier, we need to extend the theory of Sec.III by taking into account the noise associated with the current J(t) in the SQUID loop. Furthermore, the current noise is partially correlated with the voltage noise across the SQUID, the cross-spectral density being78 SvJ(f) == 12 kB T.…”

Section: The De Squid As a Radiofrequency Amplifiermentioning

confidence: 99%

SQUID Concepts and Systems

Clarke

1989

Superconducting Electronics

Self Cite

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Section: The De Squid As a Radiofrequency Amplifiermentioning

confidence: 99%

SQUID Concepts and Systems

Clarke

1989

Superconducting Electronics

Self Cite

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“…Improving the linearity implies improving the spur free dynamic range (SFDR). Leading to improvements for low noise amplifier (LNA), which would increase link margins and affect the entire communication system [5][6][7][8]. Other applications can include unmanned aerial vehicles (UAVs), where size, weight and power are limited.…”

Section: Introductionmentioning

confidence: 99%

Coupled non-uniform bi-squid: A numerical investigation

Longhini¹,

Berggren²,

Palacios³

et al. 2012

AIP Conference Proceedings

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“…Low-noise RF amplifier based on a dc SQUID (SQA) is a promising candidate for different applications in front-end receiver subsystems where low-noise and low power consumption are essential [1]. In general, SQA can be viewed as a peculiar type of non-linear parametric amplifier and thereafter can produce intermodulation harmonics [2].…”

Section: Introductionmentioning

confidence: 99%

A high-Tc L-band SQUID amplifier combined with superconductive thin-film filters

Kalabukhov

Tarasov

Stepantsov

et al. 2002

Physica C: Superconductivity

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An experimental investigation of high-temperature dc SQUID amplifier connected in series with a high-T c superconductor (HTS) thin-film band-pass filter is presented. The SQUID amplifiers are designed with microstrip input coils and fabricated on bicrystal substrates of zirconia and sapphire with different misorientation angles of 24°and 37°. SQUID parameters are optimized to attain 50-X input impedance for the 1500 MHz central frequency range. The maximum power gain of the amplifier with six turn input coil was measured to be 6 dB at 800 MHz and 4.5 dB at 1750 MHz. Thin-film HTS YBCO filters are based on a band-pass quasi-elliptic prototype consisting of a set of parallel tank circuits connected to a shunt and separated by admittance inverters. The central frequency of the band-pass filter was adjusted close to 1750 MHz amplifier frequency with 4% bandwidth. The natural combination of a high-T c SQUID amplifier with a HTS band-pass filter allows the reduction of out-of-band noise and optimization of amplifier performance, and demonstrates compatibility with practical components of front-end receiver subsystems. Ó

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DC SQUIDs as radiofrequency amplifiers

Cited by 99 publications

References 18 publications

SQUID Concepts and Systems

SQUID Concepts and Systems

Coupled non-uniform bi-squid: A numerical investigation

A high-Tc L-band SQUID amplifier combined with superconductive thin-film filters

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