From the article: > In this case, the antenna is contained in a 3-D printed object made of conductive printing filament that mixes plastic with copper. So thi

From the article: > In this case, the antenna is contained in a 3-D printed object made of conductive printing filament that mixes plastic with copper. So this appears to be some sort of copper-plastic alloy that prints well and is conductive after printing. This part seems more revolutionary than the commercial aspect.