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A new accurate calibration for a noise-figure meter

✍ Scribed by F. Giannini; E. Bourdel; D. Pasquet

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
93 KB
Volume
47
Category
Article
ISSN
0895-2477

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✦ Synopsis

A method for the parameter measurement of a noise-figure meter is proposed. It permits us to perform noise-figure measurement without a tuner. The only assumption lies in the correlation term of the noise model. Variation of the noise source with the temperature is taken into account.

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## Abstract Circular loops are the most common MR detectors. Loop arrays offer improved signal‐to‐noise ratios (SNRs) and spatial resolution, and enable parallel imaging. As loop size decreases, loop noise increases relative to sample noise, ultimately dominating the SNR. Here, relative noise contr