An electronic device includes a multilevel package substrate having a first level, a second level, a third level, a conductive signal trace that extends in the second level, and a conductive box shield that surrounds a portion of the conductive signal trace. The electronic device includes a semiconductor die attached to the multilevel package substrate and having a conductive structure coupled to an end of the conductive signal trace. The electronic device includes a package structure that encloses the semiconductor die and a portion of the multilevel package substrate.