Quadratic Mixing of Radio Frequency Signals using Superconducting Quantum Interference Filters

Abstract

The authors demonstrate quadratic mixing of weak time harmonic electromagnetic fields applied to Superconducting Quantum Interference Filters, manufactured from high-$T_{\mathrm{c}}$ grain boundary Josephson junctions and operated in active microcooler. The authors use the parabolic shape of the dip in the dc-voltage output around B=0 to mix \emph{quadratically} two external rf-signals, at frequencies $f_1$ and $f_2$ well below the Josephson frequency $f_{\mathrm{J}}$, and detect the corresponding mixing signal at $|f_1-f_2|$. Quadratic mixing takes also place when the SQIF is operated without magnetic shield. The experimental results are well described by a simple analytical model based on the adiabatic approximation.

arXiv comment3 pages, 3 figures

References in corpus (4)

• Disorder Effects in Superconducting Multiple Loop Quantum Interferometers
• Nonperiodic Flux to Voltage Conversion of an Arithmetic Series Array of dc SQUIDs
• High performance magnetic field sensor based on Superconducting Quantum Interference Filters
• Effects of magnetic field on two-dimensional Superconducting Quantum Interference Filters

Cited by in corpus (7)

• Active Electrically Small Antenna Based on Superconducting Quantum Array
• Development of 2D Bi-SQUID Arrays with High Linearity
• High-Tc Superconducting Quantum Interference Filters (SQIFs) made by ion irradiation
• Static and Radio-frequency magnetic response of high Tc Superconducting Quantum Interference Filters made by ion irradiation
• Two tone response in Superconducting Quantum Interference Filters
• Two tone response of radiofrequency signals using the voltage output of a Superconducting Quantum Interference Filter
• Modelling the transfer function of two-dimensional SQUID and SQIF arrays with thermal noise