Patent ID: 6133737
Filing Date: 2000-10-17
Classification: G01R,H01Q

Abstract:
A circularly polarizing antenna for a magnetic resonance apparatus, comprising:a first linear antenna subsystem comprising a first longitudinal conductor and a second longitudinal conductor disposed opposite each other with identical respective lateral spacing parallel to an axis, said first linear antenna subsystem having a first signal terminal and said first and second longitudinal conductors each having a first end and each having a second end;a second linear antenna subsystem comprising a third longitudinal conductor and fourth longitudinal conductor disposed opposite each other with said identical lateral spacing parallel to said axis, said second linear antenna subsystem having a second signal terminal and said third and fourth longitudinal conductors each having a first end and a second end;said first and second antenna subsystems being rotated by 90.degree. relative to each other around said axis;a first self-contained conductor surrounding said axis;said first end of said first longitudinal conductor being connected to said first self-contained conductor via a first capacitance and said first end of said second longitudinal conductor being connected to said first self-contained conductor via a second capacitance;said first signal terminal being connected across said first capacitance;a second self-contained conductor surrounding said axis;said third longitudinal conductor being connected to said second self-contained conductor via a third capacitance and said fourth longitudinal conductor being connected to said second self-contained conductor via a fourth capacitance;said second signal terminal being connected across said third capacitance; anda third self-contained conductor surrounding said axis and connected to the respective second ends of each of said first, second, third and fourth longitudinal conductors.