Quadrature Transceiver RF Arrays Using Double Cross Magnetic Wall Decoupling for Ultrahigh field MR Imaging

Circularly polarized or quadrature transceiver coils can significantly increase overall signal reception and reduce the excitation power over linearly polarized RF transceivers. Due to the wave propagation of two modes owing to their electromagnetic field properties, it is challenging to achieve sufficient decoupling in multichannel quadrature coil arrays. In this work, we proposed a double cross magnetic wall decoupling for quadrature transceiver RF arrays based on a common-mode differential-mode (CMDM) resonator at UHF 7T. The proposed method comprised of two orthogonal decoupling elements is able to reduce the mutual coupling between the multi-modes in a pair of CMDM resonators.