Antenne fuer Nahfeldreader und/oder Nahfeldtransponder

(A1) Die Erfindung ist eine Antenne bzw. ein Antennensystem fuer einen induktiv gekoppelten Nahfeld-Reader und/oder Nahfeld-Transponder. Die Antenne weist mindestens zwei Windungen auf, welche, aus einer Hauptdetektionseinrichtung betrachtet, nebeneinander angeordnet und gegeneinander gepolt sind, derart, dass die Magnetfelder der ersten und der zweiten Windung zumindest teilweise ein gemeinsames ringfoermiges Magnetfeld ausbilden.

EP 1956680 A1 UPAB: 20080912 NOVELTY - The antenna has two coils (11, 12) arranged in parallel from a main detection direction (HDR) and poled against each other such that magnetic fields (2) of the two coils form a common circular magnetic field. A third coil (13) is arranged between the two coils (11, 12), where the three coils are arranged in the form of an unclosed toroid coil. The coil (11) corresponds to the beginning of the toroid coil and the coil (12) corresponds to the end of the toroid coil. The three coils are formed of metallic conductors. The two coils (11, 12) are arranged on a carrier i.e. printed circuit board. USE - Antenna for use in an antenna system for data exchange between a near-field reader and near-field transponder of the antenna system (all claimed), where the antenna system is utilized for the identification of an object i.e. metal object, and/or contents of the object. ADVANTAGE - The geometry of the antenna increases a coupling factor between the near-field reader and the near-field transponder, thus facilitating a strong improvement of the communication between the near-field reader and the near-field transponder.