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Updated: Dec 5, 2025

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
A wideband cryogenic microwave low-noise amplifier
Boris I Ivanov1, Dmitri I Volkhin1, Ilya L Novikov1
1Novosibirsk State Technical University, K.Marx-Av.20, Novosibirsk, 630073, Russia.
Abstract:
A broadband low-noise four-stage high-electron-mobility transistor amplifier was designed and characterized in a cryogen-free dilution refrigerator at the 3.8 K temperature stage. The obtained power dissipation of the amplifier is below 20 mW. In the frequency range from 6 to 12 GHz its gain exceeds 30 dB. The equivalent noise temperature of the amplifier is below 6 K for the presented frequency range. The amplifier is applicable for any type of cryogenic microwave measurements. As an example we demonstrate here the characterization of the superconducting X-mon qubit coupled to an on-chip coplanar waveguide resonator.
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