Enrico Pannicke1, Wolfgang Driesel, Andre Pampel2,
Toralf Mildner3, Harald E. Mller1
1Max Planck Institute for
Human Cognitive & Brain Sciences, Leipzig, Germany; 2Max
Planck Institute for Human Cognitive & Brain Sciences, Leipzig, Saxony,
Germany; 3Max Planck Institute for Human Cognitive & Brain
Sciences, Germany
The Butler matrix transforms the N channels of a phased array into a new set of so-called eigenmodes with useful properties for both reception and transmission. In the current work, we performed simulations of an eight-channel phased array based on microstrip transmission line (MTL) elements and driven in an eigenmode configuration to investigate the effects of errors of individual components of the Butler matrix on the obtained electromagnetic fields. Results of the calculations were compared to experimental data recorded at 3 T.