Patent ID: 8441403
Filing Date: 2013-05-14
Classification: B42D,G06K

Abstract:
1. A security document in the form of a booklet which has a large number of sheets connected to one another to form the booklet, wherein a first sheet of the security document has a carrier layer, an antenna structure arranged in a first region for RF communication and an electronic circuit connected to the antenna structure with a memory device for storing data, and a communication device connected to the antenna structure for communicating data stored in the memory device to a reader via a radio interface by means of the antenna structure, wherein a second sheet of the security document has a carrier layer and two or more electrically conductive layers shaped in a second region for the formation of at least one LCR (inductive-capacitance-resistance) resonant circuit, and wherein the antenna structure and the at least one LCR resonant circuit are arranged on the respective carrier layer in such a way that, when the booklet is closed, the first region of the first sheet and the second region of the second sheet overlap at least in some regions and the at least one LCR resonant circuit is electromagnetically coupled to the antenna structure, and wherein the LCR resonant circuit comprises a first coil-type conductor structure shaped in a first of the two or more electrically conductive layers, a second coil-type conductor structure shaped in a second of the two or more electrically conductive layers and a dielectric layer arranged between the first and second coil-type conductor structures.