Interface for communication between subscriber identity module card and contactless external device e.g. reader, has antenna connected in wired manner to another antenna and is intended to be coupled electromagnetically with external device

摘要

The interface has a spiral antenna (6) that is intended to be coupled electromagnetically with a spiral antenna (11) of a contactless smart card (10) i.e. subscriber identity module card. Another antenna is connected in a wired manner to the former antenna and is intended to be coupled electromagnetically with a contactless external device e.g. near field communication tag. A battery (1) is utilized for presenting an obstacle to the passage of electromagnetic flow emitted or received by the former antenna of the contactless smart card. The battery is arranged in a mobile phone (20). Independent claims are also included for the following: (1) a battery (2) a mobile communication terminal.