Patent ID: 6842003

Claim:
A radio-frequency antenna system of a magnetic resonance apparatus comprising: a radio-frequency antenna having two end rings spaced from each other along an antenna axis and each being disposed concentrically to said antenna axis and a plurality of antenna rods disposed around said antenna axis and connecting said end rings to each other; a feed module; a coupling element between said feed module and said radio frequency antenna; said feed module being connected to said coupling element and supplying at least one radio-frequency input current to said coupling element in a transmission mode and receiving at least one radio-frequency output current from said coupling element in a reception mode; and said coupling element consisting of a conductor system proceeding circumferentially around said antenna axis radially spaced from said antenna rods, and disposed between said end rings, said coupling element being only inductively coupled to said end rings and to said antenna rods in said transmission mode, wherein electromagnetic energy is coupled from said feed module into said end rings and into said antenna rods and, in said reception mode, wherein radio-frequency electromagnetic energy is coupled out of said end rings and out of said antenna rods into said feed module.