A short-distance communication antenna can satisfactorily transmit and receive an information signal within a regulation range of the radio law. Also, the short-distance communication antenna provided on a card reader/writer enables the card reader/writer to communicate with a non-contacting...http://www.google.com/patents/US5694139?utm_source=gb-gplus-sharePatent US5694139 - Short-distance communication antenna and methods of manufacturing and using the short-distance communication antenna 
