Back to results
US 2018/0123221 A1Published application
Smartcards, rfid devices, wearables and methods
AssigneeFéinics AmaTech Teoranta
InventorsDavid Finn, Mustafa Lotya, Darren Molloy
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFéinics AmaTech Teoranta
InventorsDavid Finn, Mustafa Lotya, Darren Molloy
Estimating the term…
Coupling frames comprising a conductive (metal) surface with a slit (S) or non-conductive stripe (NCS) extending from an outer edge to an inner position thereof, and overlapping a transponder device. A coupling frame with slit for coupling with an inductive or capacitive device (inductor or capacitor) may be used at any ISM frequency band to concentrate surface current around the slit. The coupling frame can be tuned to operate at a frequency of interested by introducing a resistive, inductive or capacitive element. The resonance frequency of the coupling frame can be matched to that of the transponder chip module to achieve optimum performance. Coupling frames with or without a transponder device may be integrated, overlapping, stacked or placed adjacent to one another to enhance system performance. Multiple coupling frames may be electrically isolated from one another by the application of a dielectric coating such Diamond Like Carbon (DLC).
An RFID device comprising:
A method of improving coupling between an RFID device comprising a transponder chip module (TCM) and an external reader, the transponder chip module (TCM) comprising an RFID chip (IC, CM) and a module antenna (MA), characterized by:
In conjunction with an RFID device comprising an antenna having a number of tracks or turns separated by spaces, a coupling frame (CF) comprising a conductive surface and having an electrical discontinuity comprising a slit (S) or non-conductive stripe (NCS) extending through the surface from an outer edge thereof to an inner position thereof, wherein the coupling frame is disposed so that the slit (S) overlaps at least a portion of the module antenna (MA), and a capacitor connected across the slit (S) or non-conductive stripe (NCS).
Dependencies are inferred from the claim text.