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Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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DECOUPLING OF TWO CLOSELY LOCATED DIPOLES BY A SINGLE PASSIVE SCATTERER FOR ULTRA-HIGH FIELD MRI

By M. S. M. Mollaei, S. A. Kurdjumov, A. A. Hurshkainen, and C. R. Simovski

Full Article PDF (768 KB)

Abstract:
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.

Citation:
M. S. M. Mollaei, S. A. Kurdjumov, A. A. Hurshkainen, and C. R. Simovski, "Decoupling of Two Closely Located Dipoles by a Single Passive Scatterer for Ultra-High Field MRI," Progress In Electromagnetics Research, Vol. 164, 155-166, 2019.
doi:10.2528/PIER18101703
http://www.jpier.org/PIER/pier.php?paper=18101703

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