Two major factors that limit the performance of Rx coil arrays are restrictions on coil geometry and numbers. For the widely used L/C loop array, each loops’ size has to be reduced to achieve an increased number of coils. An alternative approach is to use hybrid coils which combine loops with other resonator shapes such as a figure-of-8 coil, butterfly coil, microstrip or dipole. However, the coupling between elements in hybrid coil arrays proves to be challenging due to the proximity of more coil elements. To solve this problem, we propose a novel design named “shielded hybrid coil” which combines hybrid loop+figure-of-8 resonators with circumferential shielding. We proposed two kinds of shielded hybrid resonator arrays (inner- or outer-pick-up) that exhibit an obvious Rx-performance improvement compared to conventional loop arrays. We also find that the Rx-performance is better with outer-pick-up.
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