3D curved electric dipole antenna for propagation delay compensation
Gang Chen 1,2 , Daniel Sodickson 1 , and Graham Wiggins 1
Center for Advanced Imaging Innovation and
Research (CAI2R) and Center for Biomedical Imaging,
Department of Radiology, New York University School of
Medicine, New York, NY, United States,
Sackler Institute of Graduate Biomedical Science, New
York University School of Medicine, New York, NY, United
For a body-sized phantom at 7 Tesla, the ideal current
patterns for curl-free current modes display V-shaped
distributions due to the need for phase evolution along
the axial direction (z) to account for propagation
delays to or from the central region of interest.
Previous studies have shown that either bending the
electric dipole into a V or shortening a straight dipole
helps to mitigate destructive interference of signal,
and therefore to increase transmit efficiency or SNR, at
the central point of interest. Here we describe a novel
3D curved electric dipole antenna design constructed on
a dielectric substrate to compensate for propagation
delays and increase central B1+ efficiency.
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