Abstract
Superconducting quantum interference filters (SQIFs) are multi-loop arrays of Josephson junctions possessing unconventional grating structures. For specially selected array loop size distributions the magnetic flux to voltage transfer function of SQIFs has a unique delta-peak like characteristics at zero applied flux. In contrast to conventional superconducting quantum interference devices (SQUIDs) which posses periodic flux-to-voltage transfer functions, the unique voltage response of SQIFs allows such devices to be directly employed as detectors of absolute strength of magnetic fields. The magnetic field resolution of SQIFs is comparable to or may be even better than that of conventional SQUIDs. In practice, SQIFs may have a number of significant advantages since their performance is not degraded by spreads in the Josephson junction parameters or deviations in the array loop sizes. This fault tolerance allows SQIFs to be realized in a relative simple way and has been used for the successful development of high performance low- and high-Tc SQIFs.KeywordsJosephson JunctionTransfer FactorVoltage ResponseVoltage SwingLoop SizeThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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