Products, processes, compositions, kits, and methods are provided for cartilage-derived implants. The fin is generally planar and fin-shaped, having a heel end and a toe end, with opposing lateral sides extending between the toe end and the heel end. The method comprises determination of a first timing of a signal burst received at the receiving station, the first timing being associated with the first component of the received signal burst that meets a predefined condition. A conductive layer is formed on the outer circumference surface at a center portion of the conductive shaft defined between the pair of concave portions. An EMI shield formed from a metallic foil such as copper is wrapped around the winding to prevent the radiation of EMI.