Patent ID: 7663370
Filing Date: 2010-02-16
Classification: G01R

Abstract:
1. A control arrangement for operating an antenna in a magnetic resonance examination, comprising: a signal splitting device comprising an input supplied with a radio-frequency input transmission channel, a first output, and a second output; said signal splitting device comprising a plurality of phase-shaping components that act on said input transmission signal to divide said input transmission signal to into a first transmission signal at said first output and a second transmission signal at said second output; said signal splitting device comprising a plurality of switchable components, with each of said phase-shaping components having one of said switchable components connected in parallel therewith, said switchable components being individually operable to respectively activate or deactivate the one of said phase-shaping components in parallel therewith to set a phase difference between said first transmission signal and said second transmission signal; and an antenna arrangement comprising first and second connections respectively connected to said first and second outputs of said signal splitting device, said antenna arrangement being configured to radiate a circularly-polarized field as soon as the first and second transmission signals respectively at said first and second connections exhibit a phase difference therebetween of 90°.