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:
Jul. 15, 2003
Filed:
Nov. 20, 2001
Michael Burl, Chagrin Falls, OH (US);
Thomas Chmielewski, Willoughby Hills, OH (US);
William O. Braum, Twinsburg, OH (US);
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
A multi-channel RF cable trap ( ) blocks stray RF current from flowing on shield conductors ( ) of coaxial RF cables ( ) of a magnetic resonance apparatus. An inductor ( ) is formed by a curved semi-rigid trough ( ) constructed of an insulating material coated with an electrically conducting layer. Preferably, the inductor ( ) and the cable follow an “S”-shaped path to facilitate good electromagnetic coupling therebetween. The RF cables ( ) are laid in the trough ( ) and the shield conductors inductively couple with the inductor ( ). A capacitor ( ) and optional trim capacitor ( ) are connected across the the trough of the inductor ( ) to form a resonant LC circuit tuned to the resonance frequency. The LC circuit inductively couples with the shield conductors ( ) to present a high, signal attenuating impedance at the resonance frequency. The resonant circuit is preferably contained in an RF-shielding box ( ) with removable lid.