Birdcage-like transmitting antenna for mri

A transmission antenna for magnetic resonance applications, comprising:

• an antenna structure comprising a plurality of antenna rods, each having a first end and a second end, said antenna structure having a central axis and said antenna rods being distributed around, and parallel to, said central axis;
• said antenna structure further comprising a first terminating element that terminates said antenna rods at the respective first ends thereof, and a second terminating element that terminates said antenna rods at the respective second ends thereof;
• said first terminating element being formed as a ferrule comprising a plurality of ferrule segments that are coupled to each other via ferrule capacitors;
• a detuning circuit that is operable to detune said antenna structure, said detuning circuit being located at said second terminating element;
• either said second terminating element being formed as a completely continuous short circuit ring and said detuning circuit being located between the respective second ends of the antenna rods and the second terminating element, or the second terminating element comprising a plurality of ferrule segments and no ferrule capacitors, with said detuning element being disposed between said ferrule segments;
• and
• said second terminating element having a larger cross-section than said first terminating element.