Yong Pang1, Chunsheng Wang2, Xiaoliang Zhang2,3
1Radiology and Biomedical imaging, University of California San Francisco, San Francisco, CA , United States; 2Radiology and Biomedical imaging, University of California San Francisco, San Francisco, CA, United States; 3 UCSF/UC Berkeley Joint Graduate Group in Bioengineering, San Francisco & Berkeley, CA, United States
An 8-element single-feed quadrature array is designed for 298 MHz using patch antenna technique. Each element is built as a nearly square ring microstrip antenna and is fed along the diagonal to generate a circularly polarized (CP) magnetic field. Compared with linear coils, the SNR can be improved by 40% or the transmission power can be reduced by half. Compared with conventional quadrature coil, this structure is simple and easily built as array. FDTD simulations demonstrate that the decoupling between elements are all better than -35dB and the RF field is homogeneous with deep penetration and quadrature behavior.