A combiner/splitter device (100) comprises two transmission lines (23,
24), wound to form a helical coil (55), this helical coil being bent to a
toroidal shape. Furthermore, a capacitor (51) is provided, connected in
parallel with the two outer conductors (25, 26) of the two transmission
lines (23, 24). The combination of the wound transmission lines and said
capacitor forms a parallel resonator (56). The combiner/splitter device
is suitable for use in a magnetic resonance imaging (MRI) system to
combine the output signals of a receiver coil system and/or to split the
input signal of a transmission coil system used in the MRI system.
