Hewlett-packard Development Company, L.P.

Joseph Stoddard

Mitchel E Wright

A circuit in a printed circuit board includes a trace and a ground plane coupled to the trace that includes slots in the vicinity of the trace. The slots are dimensioned and arrayed such that the trace has a controlled impedance. An array of slots progressing in a direction parallel to the trace preferably includes repeating subarrays displaced by a repeat distance in a direction parallel to the trace that is less than a characteristic wavelength of a signal propagated on the trace, coupling distributively with the trace. The slots may be polygonal, arcuate, or a combination of both in shape. The printed circuit board may include a second trace coupled to the first. Further, the printed circuit board may include a second ground plane that includes slots that couple to the trace.

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Houston, TX, United States of America

Joseph Stoddard