DEVICE COMPRISING AN ANTENNA FOR CONTACTLESS DATA TRANSMISSION

摘要

The invention relates to an antenna device (40; 42; 50; 60) comprising an antenna (70; 71; 72; 73; 74; 75) of a data communication interface of a data processing terminal (30) for contactless data communication with a portable data carrier (10). The antenna device (40; 42; 50; 60) is designed as a component (40; 50; 60) of the data processing terminal (30) or as an accessory unit (42) that can be coupled to the data processing terminal (30). An arrangement of the antenna (70; 71; 72; 73; 74; 75) on the antenna device (40; 42; 50; 60) predefines a relative position of the data carrier (10) with respect to the antenna device (40; 42; 50; 60) in which the contactless data communication is exclusively possible, such that during the data communication the data carrier (10) can remain in the relative position only by virtue of suitable active retaining measures, or, if the data carrier (10) remains in the relative position following concluded data communication, operation of the data processing terminal (30) is impaired.