Accurate Noise Figure Measurements for Highly Mismatched Preamplifiers

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A method reducing the uncertainty of noise figure measurements of highly mismatched preamplifiers is presented. In many cases when measuring the noise figure of preamplifiers for MRI receive arrays the uncertainty is approximately ±0.4 dB. Since the noise figure of the preamplifier is also in this range, a more accurate method is needed. Here we show an increase of 59 % in noise figure accuracy by adding an attenuator between the noise source and preamplifier.
Original languageEnglish
Publication date2018
Number of pages2
Publication statusPublished - 2018
EventJoint Annual Meeting ISMRM-ESMRMB 2018 - Paris Expo Porte de Versailles, Paris, France
Duration: 16 Jun 201821 Jun 2018


ConferenceJoint Annual Meeting ISMRM-ESMRMB 2018
LocationParis Expo Porte de Versailles
Internet address


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