Decoupling of Closely Spaced Dipole Antennas for Ultrahigh Field MRI With Metasurfaces

Phased antenna arrays of dipoles are widely used in ultrahigh field (UHF) magnetic resonance imaging for creating the controllable radio frequency (RF) distributions a human body. Due to safety and quality reasons each individual channel array should be decoupled-electromagnetically isolated from others. The required number channels is large some techniques dipole antennas located close proximity Their ultimately dense arrangement leads strong mutual coupling makes conventional decoupling structures inefficient. This needs suppressed without significant distortion RF fields imaged area. In this work, we propose study novel technique two UHF transceiver on-body antennas. performed by periodic structure five parallel resonant wires referred as metasurface (MS). contrast with single wire, MS decoupled means excitation higher order coupled mode wires, which highly confined. main advantage low RF-field central region