The present invention provides an apparatus for transferring data through an electromagnetic coupler. The apparatus comprises a transmitter to encode a first plurality of bits into a symbol, a receiver to decode a transferred symbol into a second plurality of bits; and a coupling element having a geometry...http://www.google.com.au/patents/US20010053187?utm_source=gb-gplus-sharePatent US20010053187 - Symbol-based signaling device for an elctromagnetically-coupled bus system
