SMARTCARD WITH COUPLING FRAME AND METHOD OF INCREASING ACTIVATION DISTANCE OF A TRANSPONDER CHIP MODULE
First Claim
1. Smartcard (SC) comprising:
- a metal layer (ML); and
an opening (MO) in the metal layer for receiving a transponder chip module (TCM);
characterized by;
a slit (S) extending into the metal layer, from the opening to a periphery of the metal layer, whereby the metal layer comprises an open-loop coupling frame (CF) having two ends.
2 Assignments
0 Petitions
Accused Products
Abstract
A conductive coupling frame (CF) having two ends, forming an open loop, disposed surrounding and closely adjacent a transponder chip module (TCM), and substantially coplanar with an antenna structure (AS, LES) in the transponder chip module (TCM). A metal card body (MCB) having a slit (S) extending from a module opening (MO) to a periphery of the card body to function as a coupling frame (CF). The coupling frame (CF) may be thick enough to be non-transparent to RF at frequencies of interest. A switch may be provided to connect ends of the coupling frame (CF) across the slit (S). The transponder chip module (TCM) may comprise a laser-etched antenna structure (LES) and a non-perforated contact pad (CP) arrangement.
69 Citations
20 Claims
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1. Smartcard (SC) comprising:
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a metal layer (ML); and an opening (MO) in the metal layer for receiving a transponder chip module (TCM);
characterized by;a slit (S) extending into the metal layer, from the opening to a periphery of the metal layer, whereby the metal layer comprises an open-loop coupling frame (CF) having two ends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A coupling frame (CF) for a smartcard (SC), comprising:
a metal layer (ML) disposed in a card body (CB) of the smartcard and having two ends which are not connected with one another so that the metal layer (ML) forms an open loop coupling frame (CF) which is arranged to be closely adjacent and at least partially surround a transponder chip module (TCM) disposed in a module opening (MO) in the metal layer (ML). - View Dependent Claims (14, 15, 16, 17)
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18. A method of enhancing coupling of a transponder chip module (TCM) with an external reader, wherein the transponder chip module is disposed in a card body (CB, MCB) of a smart card having a metal layer (ML) and comprises an antenna structure (AS), characterized by:
forming the metal layer as a coupling frame (CF) closely adjacent to and surrounding the transponder chip module, wherein the coupling frame is formed as an open loop having two ends. - View Dependent Claims (19)
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20. A smartcard (SC) comprising a card body (CB, MCB) and a transponder chip module (TCM) disposed in the card body, characterized in that:
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an activation distance for the transponder chip module, without a booster antenna in the card body, is at least one of; at least 2 cm; at least 3 cm; and at least 4 cm.
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Specification