A printed circuit board includes a first helical conductive trace and a second helical conductive trace. The first helical conductive trace extends generally along a longitudinal axis of a layer of the printed circuit board. The first helical conductive trace is provided successively: along a first surface,...http://www.google.com/patents/US6396000?utm_source=gb-gplus-sharePatent US6396000 - Printed circuit board and method for reducing radio frequency interference emissions from conductive traces on a printed circuit board
