Radio frequency field coil for NMR

An NMR radio frequency (RF) coil comprising a high-pass slow-wave delay line structure which is configured as a ladder network, said delay line structure being formed into a substantially cylindrical geometry and being connected to itself at its ends, wherein the side elements of the ladder network are coincident with the cylinder circumference, while the ladder rung elements are disposed lengthwise along the cylinder surface substantially parallel to the longitudinal axis of the cylinder.

An NMR radio frequency (RF) coil comprising a band-pass slow-wave delay line structure which is configured as a ladder network, said delay line structure being formed into a substantially cylindrical geometry and being connected to itself at its ends, wherein the side elements of the ladder network are coincident with the cylinder circumference, while the ladder rung elements are disposed lengthwise along the cylinder surface substantially parallel to the longitudinal axis of the cylinder.

An NMR radio frequency (RF) coil comprising:

• a pair of conductive loop elements spaced along a common longitudinal axis, each of said conductive loop elements including a plurality of serially-connected capcitive elements spaced along the peripheries thereof;
• and
• a plurality of axial conductive segments electrically interconnecting said conductive loop elements at points between said serially-connected capacitive elements.