Decoupling of Two Closely Located Dipoles by a Single Passive Scatterer for Ultra-High Field MRI

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  • St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO)


We report decoupling of two closely located resonant dipole antennas dedicated for ultra-high field magnetic resonance imaging (MRI). We show that a scatterer slightly raised over the plane of antennas grants a sufficient decoupling even for antennas separated by very small gap (below 1/30 of the wavelength). We compare the operations of two decoupling scatterers. One of them is a shortcut resonant dipole, and the other is a split-loop resonator (SLR). Previously, we have shown that the SLR offers a wider operational band than the dipole and the same level of decoupling. However, it was so for an array in free space. The presence of the body phantom drastically changes the decoupling conditions. Moreover, the requirement to minimize the parasitic scattering from the decoupling element into the body makes the decoupling dipole much more advantageous than the SLR.


Original languageEnglish
Pages (from-to)155-166
Number of pages12
Publication statusPublished - 2019
MoE publication typeA1 Journal article-refereed

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