Ideal Coil Decoupling in Receive Arrays using Negative Resistance Preamplifiers

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This work presents the method of achieving ideal decoupling between elements in a receive coil array. Generally, preamplifier decoupling is limited by nonidealities of the implemented components. It is shown analytically and numerically, that for the ideal (lossless) matching circuits the input resistance of the preamplifier should be zero, while for the realistic lossy case a small negative resistance can be used to achieve ideal decoupling. Here we use a negative input resistance preamplifier (NIRP) to compensate for the loss of the circuit. The analysis is verified experimentally showing a decoupling of -62 dB when a NIRP with an input resistance of -0.023 ? is used.
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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