ELECTRONIC TRAVEL PASS

摘要

A pocketsize electronic travel and commuter pass which can be used for making valid payment for fares or purchases of services and goods is disclosed. The pass contains capacitive plates or inductive coils (4) in pairs of two operated in such a way that their mutual phasing is correct for close proximity signal communication with an accountancy system. Noise and interference signals will appear in antiphase on the plates or coils (4) and will not affect the desired signal communication. As a result, the pass exhibits a high signal to noise ratio.