The invention concerns a locking mechanism (10) configured to switch from a locked state to an unlocked state, comprising: a. a processor (11) configured to read an identification code of an identification key (13) and configured to cause the locking mechanism (10) to switch from the locked state to the unlocked state if the identification code of the identification key (13) is an authorized code of the locking mechanism (10), b. a printed circuit board (14) in a first plane comprising an aperture (15) configured to accept insertion of the identification key (13) according to a first axis (Y) secant to the printed circuit board (14), the identification key (13) comprising a NFC passive part (16), c. a NFC active part comprising a wire antenna (18) positioned on the printed circuit board (14), the wire antenna (18) comprising a first at least one winding around the aperture (15), the wire antenna being connected to the processor (11),

wherein the locking mechanism is configured to establish a NFC communication between the NFC active part of the locking mechanism and the NFC passive part (16) of the identification key (13) when the identification key (13) is inserted into the aperture (15).

An antenna module is provided. An antenna module according to an exemplary embodiment of the present invention comprises: an antenna unit including an antenna pattern, which has a pattern portion and a lead portion formed, respectively, on both surfaces of a circuit board; a magnetic field shielding sheet including a sheet body made of a magnetic material to block a magnetic field, and a plurality of eddy current reducing pattern portions formed on the sheet body to reduce the generation of eddy current by increasing the resistance of the sheet body; and an insulation member arranged between the antenna unit and the magnetic field shielding sheet, wherein the antenna unit is provided in an asymmetric form in which the pattern portion and the lead portion respectively formed on both surfaces of the circuit board have different thicknesses.

An antenna module is provided. An antenna module according to an exemplary embodiment of the present invention comprises: an antenna unit including an antenna pattern, which has a pattern portion and a lead portion formed, respectively, on both surfaces of a circuit board; a magnetic field shielding sheet including a sheet body made of a magnetic material to block a magnetic field, and a plurality of eddy current reducing pattern portions formed on the sheet body to reduce the generation of eddy current by increasing the resistance of the sheet body; and an insulation member arranged between the antenna unit and the magnetic field shielding sheet, wherein the antenna unit is provided in an asymmetric form in which the pattern portion and the lead portion respectively formed on both surfaces of the circuit board have different thicknesses.

A wearable electronic device is described. The wearable electronic device includes two communications antennae. A first antenna of the two is a current-carrying antenna electrically and physically connected to a printed circuit board of the wearable electronic device and housed in a first portion of a housing that is configured for mounting on a person's skin. A second antenna of the two is a scatterer antenna physically connected to an interior surface of a second portion of the housing and configured to overlap a portion of the current-carrying antenna. The second portion of the housing faces away from the person's skin when the wearable device is mounted on the person's skin. Current from the current-carrying antenna is induced in the scatterer antenna to enable communications between the wearable electronic device and one or more other electronic devices.

A wearable electronic device is described. The wearable electronic device includes two communications antennae. A first antenna of the two is a current-carrying antenna electrically and physically connected to a printed circuit board of the wearable electronic device and housed in a first portion of a housing that is configured for mounting on a person's skin. A second antenna of the two is a scatterer antenna physically connected to an interior surface of a second portion of the housing and configured to overlap a portion of the current-carrying antenna. The second portion of the housing faces away from the person's skin when the wearable device is mounted on the person's skin. Current from the current-carrying antenna is induced in the scatterer antenna to enable communications between the wearable electronic device and one or more other electronic devices.

In an antenna design, a metal frame of an electronic device and a printed circuit board (PCB) form a slot antenna radiator, where two common mode (CM) slot antenna modes of the slot antenna radiator are excited through anti-symmetrical feeding, so that when dual resonances and wideband coverage are implemented, specific absorption ratio (SAR) values in the two CM slot antenna modes are close.

A module substrate antenna (1) includes a first coil (7) and a second coil (8) that are connected in parallel. The first coil (7) is composed of a pattern in which a spiral first antenna coil pattern (3a) and a spiral second antenna coil pattern (5a) are interlayer-connected in series. The second coil (8) is composed of a pattern in which a spiral third antenna coil pattern (4a) and a spiral fourth antenna coil pattern (6a) are interlayer-connected in series. The coil patterns are arranged in order of the first antenna coil pattern (3a), the third antenna coil pattern (4a), the second antenna coil pattern (5a), and the fourth antenna coil pattern (6a).

A module substrate antenna (1) includes a first coil (7) and a second coil (8) that are connected in parallel. The first coil (7) is composed of a pattern in which a spiral first antenna coil pattern (3a) and a spiral second antenna coil pattern (5a) are interlayer-connected in series. The second coil (8) is composed of a pattern in which a spiral third antenna coil pattern (4a) and a spiral fourth antenna coil pattern (6a) are interlayer-connected in series. The coil patterns are arranged in order of the first antenna coil pattern (3a), the third antenna coil pattern (4a), the second antenna coil pattern (5a), and the fourth antenna coil pattern (6a).

An electronic device may include a transceiver, first and second antennas, and a passive radio-frequency power distribution circuit. The distribution circuit may have a first port coupled to the transceiver, a second port coupled to the first antenna, and a third port coupled to the third antenna. The distribution circuit may include a transformer coupled between the ports. The transformer may have at least two intertwined inductors formed from conductive traces on a dielectric substrate. The intertwined inductors may be concentric about a common point. The intertwined inductors may extend from the common point to the second and third ports. The intertwined inductors may have a coil or spiral shape and may wind around the common point at least once. Intertwining the inductors may serve to minimize the lateral footprint of the distribution circuit in the device.

An electronic device may include a transceiver, first and second antennas, and a passive radio-frequency power distribution circuit. The distribution circuit may have a first port coupled to the transceiver, a second port coupled to the first antenna, and a third port coupled to the third antenna. The distribution circuit may include a transformer coupled between the ports. The transformer may have at least two intertwined inductors formed from conductive traces on a dielectric substrate. The intertwined inductors may be concentric about a common point. The intertwined inductors may extend from the common point to the second and third ports. The intertwined inductors may have a coil or spiral shape and may wind around the common point at least once. Intertwining the inductors may serve to minimize the lateral footprint of the distribution circuit in the device.