Electromagnetic radiation reduction technique using grounded conductive traces circumscribing internal planes of printed circuit boards

A printed circuit board, comprising:

• a plurality of layers, each said layer having an inner component area circumscribed by a border area, wherein one of said layers is a ground plane, one of said layers is a power plane, and at least one of said layers is a signal layer;
• each layer including a plurality of conductive vias penetrating said layer, said conductive vias being located between said inner component area and said border area of each said layer, wherein said conductive vias define a circuitous path circumscribing said inner component area of each said layer and wherein said layers are stacked together so that each one of said plurality of conductive vias are aligned and in conductive contact with corresponding conductive vias of every other one of said plurality of layers;
• said ground plane including a conductive portion covering part of the inner component area of said ground plane, said conductive portion of said ground plane also extending to and electrically coupling to each of said plurality of conductive vias;
• each said signal layer including a conductive trace routed between said border area and said inner component area of said signal layer, said signal layer conductive trace generally following said circuitous path and electrically connecting to each of said conductive vias to circumscribe the inner component area of said signal layer;
• and
• said power plane including a conductive portion covering part of said power plane inner component area, and also including a conductive trace routed between said border area and said inner component area of said power plane, said power plane conductive trace generally following said circuitous path and electrically connecting to each of said vias to circumscribe the inner component area of said power plane, said power plane further including a nonconductive electrical isolation path between said power plane conductive portion and said power plane conductive trace.