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Design of a SQUID array as a discrete spatial filter

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Abstract:

A discrete spatial filter has been realized from a linear array of high temperature SQUIDs. We used two design methods to obtain several spatial frequency responses. The design consists of finding a weighting factor for each SQUID amplifier and setting the number of SQUIDs in the array. The results are discussed and checked experimentally with magnetic dipole sources at different lift-offs. The SQUID array keeps the original signal characteristics of the source and can even increase the noise rejection obtained with electronic planar first-order gradiometers.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/17/7/014

Publication date: July 1, 2004

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