The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2010
Filed:
May. 09, 2007
Wonje Lee, Pewaukee, WI (US);
Krishna N. Kurpad, Middleton, WI (US);
Eddy B. Boskamp, Menomonee Falls, WI (US);
Wonje Lee, Pewaukee, WI (US);
Krishna N. Kurpad, Middleton, WI (US);
Eddy B. Boskamp, Menomonee Falls, WI (US);
Wisconsin Alumni Research Foundation, Madison, WI (US);
Abstract
A RF transmit coil decoupling circuit in a parallel drive configuration comprises a power amplifier and an output matching network to shim the Bfield in response to inhomogeneities therein. The separate coil segments in a transmit array are effectively decoupled from each other despite inherent mutual inductance between coil segments by the decoupling circuit. The output matching network forms a high impedance block seen by the coil elements, while it provides a load line impedance at the output of the power amplifier. The transmission line transformer in the output matching network suppresses higher order harmonics for clearer RF wave forms. It also dampen the Q factor of the output matching network allowing stable operation with a series tuned coil element.