At 9.4T, transmit-only RF array coils for human brain imaging provide mediocre transmit efficiency due to a weak loading factor, which implies low power dissipation in the tissues. In this work we aim to optimize using the full-wave simulations a dual row 16-channel transmit-only array to improve the transmit performance. For that purpose, we simulated eight different array designs containing the loops with overlapping and gaps between the rows and two configurations of loopoles. We have shown that the optimized design with the overlapped loops provides improvement ~15% in Tx-efficiency and 16.5% improvement in SAR-efficiency compared to the reference coil.
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