Patent ID: 6636039
Filing Date: 2003-10-21
Classification: G01R

Abstract:
A radio-frequency antenna for a magnetic resonance apparatus, said radio-frequency antenna having a longitudinal axis and comprising:two longitudinal antenna conductors disposed opposite each other and substantially parallel to said longitudinal axis, each of said two longitudinal antenna conductors having a first end and a second end; a first radio-frequency shorted conductor loop formed by a first conductor with a first capacitor connected therein, said first radio-frequency shorted conductor loop being electrically connected to the respective first ends of said two longitudinal antenna conductors, and a second radio-frequency shorted conductor loop formed by a second conductor with a second capacitor connected therein, said second radio-frequency shorted conductor loop being electrically connected to the respective second ends of said two longitudinal antenna conductors, said two longitudinal antenna conductors and said first and second shorted conductor loops forming a conductor configuration having an interior and an exterior; a radio-frequency shield that is electromagnetically coupled to said two longitudinal antenna conductors and to said first and second conductor loops for shielding radio-frequency fields toward the exterior of said conductor configuration said radio-frequency shield having opposite shield ends respectively at said first conductor loop and said second conductor loop; a first signal terminal node electrically connected to said radio-frequency shield at one of said shield ends; and a second signal terminal electrically connected at said one of said first and second conductor loops at said one of said shield end, said first signal terminal node and said second signal terminal having an impedance between said first signal terminal node and said second signal terminal which is substantially equal to a characteristic impedance of a signal line connectable across said first signal terminal node and said second signal terminal.