Modeling the Behavior of HTS Terahertz RSQUIDs

Pegrum, C.M.; Macfarlane, J.C.; Du, Jia

doi:10.1109/tasc.2010.2091094

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…The detailed theoretical and experimental study of the relationship of IF output amplitude with the bias current I B is underway and will be reported elsewhere. Theoretical modeling of the HTS R-SQUID oscillator can be found in [17] and the simulation results of the mixing behavior for the described R-SQUID mixer will be reported soon. 2 GHz.…”

Section: Methodsmentioning

confidence: 99%

Self-pumped HTS Josephson heterodyne tunable mixer

Macfarlane

Zhang

et al. 2012

Supercond. Sci. Technol.

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Experimental evaluation of a high-temperature superconducting Josephson heterodyne mixer based on a 'resistive-SQUID' configuration is reported. The device consists of two YBa 2 Cu 3 O 7−x step-edge Josephson junctions connected via a small resistor in an otherwise superconducting loop. It has been previously shown to generate a heterodyne oscillation, which is frequency-tunable by a control current through the resistor. Under certain conditions, this device can operate as a frequency-tunable heterodyne mixer (down-converter) in the presence of an RF signal. In this paper, we describe the operation of the autonomous Josephson mixer-local oscillator device and present the experimental results on the mixer performances in terms of the junction current-voltage characteristics, the frequency tunability, linearity, and dynamic range as well as their temperature dependence for signal frequencies from 1 to 5 GHz.

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Section: Methodsmentioning

confidence: 99%

Self-pumped HTS Josephson heterodyne tunable mixer

Macfarlane

Zhang

et al. 2012

Supercond. Sci. Technol.

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“…This current produces corresponding voltage on shunt and therefore on JJ. The resistance of shunt is the same as the inner resistivity of the voltage source in the cold zone [10], [13], [17]. This voltage can be measured and controlled by the voltmeter.…”

Section: A Panoramic Receiver For Prfmentioning

confidence: 99%

“…In practice, ∼170 MHz of oscillation line bandwidth corresponds to 1 Ω of JJ resistance at ∼4.2 K. Thus, the JJ itself emits a spectrum within "effective" bandwidth ΔΓ eff , which depends on R ext (in Fig. 1, the first winding in the transformer uses superconductive wire), the inductance of shunt circuit, the distributed capacities and inductances in practical JJ design [1], [17], and the considered frequency. It should be noted that, in practice, it is needed to use shunt in the bias scheme shown in Fig.…”

Section: A Panoramic Receiver For Prfmentioning

confidence: 99%

Possibilities to Make Panoramic Receiver–Frequency Meter in Terahertz Band Based on Josephson Junctions

Denisov

Qiu

et al. 2015

IEEE Trans. Appl. Supercond.

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Based on previous theoretical and experimental investigations, possibilities of using Josephson junctions (JJs) to realize a new type of wideband frequency meter integrated with panoramic receiver (PRF) in terahertz band in a single unit were described in this paper. The suggested device can be particularly valuable for experimental purposes in terahertz band, where available equipment for frequency-domain measurements are usually of narrow band and expensive. It will be particularly useful to measure, for instance, the operating frequency of new generators in terahertz band whose radiation power is small, and operating frequency may deviate significantly from its design specification. Such a device can be realized by integrating two circuits in a single unit based on the JJ. The first circuit is a receiver based on JJ operating in a self-pump-mode regime, whereas the second one is a super wideband frequency meter using JJ operating as its natural measuring device.

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“…Recently, we developed a gigahertz HTS Josephson heterodyne resistive superconducting quantum interference device (RSQUID) oscillator [5][6][7] and mixer [8][9][10] which demonstrated unique features of reduced oscillation linewidth (compared to a single Josephson junction device), wide-range frequency tuneability, and internally pumped frequency down-converting capability (no external LO needed). In the present work, we explore the possibility of combining a HTS RF band-pass filter (BPF) and a HTS low-pass filter (LPF) with the Josephson oscillator-mixer device to realise a monolithic HTS RF front-end receiver module.…”

mentioning

confidence: 99%

“…1(b)). Under suitable conditions, it can be operated as a current-controlled heterodyne oscillator [5][6][7] and a self-pumped mixer. [8][9][10] Since the LO is generated intrinsically within the mixer structure itself, much more efficient coupling of the pumping power to the mixer is achieved despite the fact that the output power of a single Josephson oscillator is very small.…”

mentioning

confidence: 99%

Monolithic high-temperature superconducting heterodyne Josephson frequency down-converter

Zhang

Macfarlane

et al. 2012

Applied Physics Letters

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A monolithic microwave integrated circuit (MMIC) frequency down-converter based on a compact high-Tc superconducting (HTS) device is demonstrated. The on-chip integrated HTS down-converter consists of a 7–9 GHz bandpass filter for RF input, a lowpass filter for intermediate frequency output, and a self-pumped Josephson heterodyne mixer. All the above passive and active components are fabricated on a single 10 mm × 20 mm chip of YBa2Cu3O7−x film on MgO substrate. Characterization of this MMIC HTS down-converter in terms of frequency response, conversion gain, frequency-tuneability, bias dependence, dynamic range, linearity, and intrinsic noise are presented in this paper.

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Modeling the Behavior of HTS Terahertz RSQUIDs

Cited by 7 publications

References 29 publications

Self-pumped HTS Josephson heterodyne tunable mixer

Self-pumped HTS Josephson heterodyne tunable mixer

Possibilities to Make Panoramic Receiver–Frequency Meter in Terahertz Band Based on Josephson Junctions

Monolithic high-temperature superconducting heterodyne Josephson frequency down-converter

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