Two-dimensional spatial frequency response of SQUID planar gradiometers
| Autor: | E. Andrade Lima, Antonio C. Bruno, J. Szczupak |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Physics
business.industry Physics::Medical Physics Bandwidth (signal processing) Metals and Alloys Condensed Matter Physics Gradiometer Magnetic field symbols.namesake Optics Planar Fourier transform Materials Chemistry Ceramics and Composites symbols Cutoff Spatial frequency Electrical and Electronic Engineering business Optical resolution |
| Zdroj: | Superconductor Science and Technology. 12:949-952 |
| ISSN: | 1361-6668 0953-2048 |
| DOI: | 10.1088/0953-2048/12/11/376 |
| Popis: | Planar gradiometers can be modelled as two-dimensional spatial filters, taking into account area, baseline and shape of the coils. We associate a spatial frequency response with each configuration studied and show that planar gradiometers behave as band-pass spatial filters. Also, in order to determine a spatial frequency range for typical magnetic field sources, we calculate the two-dimensional Fourier transform of the field due to a current dipole for several liftoffs. Important issues such as gradiometer spatial cutoff frequencies, bandwidth and symmetry are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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