Patent ID: 7221162

Claim:
A radio frequency transmitter arrangement configured for a magnetic resonance apparatus comprising: an antenna unit having an antenna structure configured to generate respective radio frequency fields in at least two orthogonal modes; and a distribution unit having an input configured to receive an RF transmission signal, said distribution unit dividing said RF transmission signal into at least two mode feed signals supplied to respective outputs of said distribution unit, to which said antenna unit is connected for generating said radio frequency fields in the respective orthogonal modes dependent on the respective mode feed signals at the outputs of said distribution unit; said distribution unit comprising an adjustment unit connected between said input and one of said outputs that is configured for adjusting at least one of an amplitude and a phase of the mode feed signal at said one of said outputs, and a distributor that divides said RF transmission signal into a basic transmission signal and at least one auxiliary transmission signal, said basic transmission in said at least one auxiliary transmission signal being present at the respective outputs of the distribution unit; said distributor comprising a distributor network, formed by a Butler Matrix enabling analog Fourier transformation, having at least two inputs connected to said input of said distributor unit and at least two outputs respectively connected to the outputs of said distributor unit, said distributor network generating the respective mode feed signals at the outputs thereof with a predetermined phase occupancy; and said antenna unit comprising a plurality of antenna units respectively connected to the outputs of said distributor network via the outputs of said distributor unit.