Abstract #3804

Design and Numerical Evaluation of an 8-Element Quadrature Transceiver Array Using Single-Feed CP Patch Antenna for Parallel Reception and Excitation

Yong Pang¹, Chunsheng Wang², Xiaoliang Zhang^2,3

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.