A system for communicating with a wireless device including a base including a front surface; a plurality of communication coils disposed on the front surface and arranged in a matrix, the coils being tuned to a near-field communication frequency; a selector coupled to the coils; at least one memory storing instructions; and at least one processor coupled to the selector and executing the instructions to perform operations. The operations include at least receiving a plurality of feedback signals associated with the coils; identifying a selected one of the coils associated with a strongest one of the feedback signals; and causing the selector to couple the selected coil with a wireless communication module.

An electronic label apparatus comprises: an inductive communication unit which communicates wirelessly using inductive signals; a processor; memory including a computer program code; and a power source which supplies electric power to the inductive communication unit, the processor, and the memory for enabling their operation. The processor, the memory, the computer program code and the power source with the electric power cause the electronic label apparatus at least to: receive a plurality of inductive signals of known transmission powers from known locations; measure signal powers of the received inductive signals; and determine information about a location of the electronic label apparatus based on the measured signal powers, the known transmission signal powers and the known locations.

The present disclosure provides a terminal device and a protective shell, and belongs to the technical field of communication. The terminal device includes a body, a first coil, a second coil and a shielding member. The body includes a rear shell. The first coil is located in the body. The second coil is located in the body and close to one side of the rear shell, and the second coil at least partially overlaps the first coil. The shielding member covers the sides, far away from the rear shell, of the first coil and the second coil, and is located outside an overlapping portion of the first coil and the second coil, and the first coil is unshielded from the second coil.

An antenna device is formed by a first electrically conductive spiral having a first end connected to a first node and a second end connected to a second node, and a second electrically conductive spiral having a first end connected to the second node and a second end connected to a third node. The first and second nodes are configured for connection to an NFC driver circuit, with the first electrically conductive spiral forming an antenna for near-field communication. The first and third nodes are configured for connection to a wireless power charging driver circuit, with the first electrically conductive spiral and second electrically conductive spiral forming an antenna for wireless power charging.

According to one embodiment, there is provided a magnetic coupling device including a first coil, a second coil, a third coil, a fourth coil, a first constant-potential node and a second constant-potential node. The second coil is electrically connected with one end of the first coil and wound in a direction opposite to a direction in which the first coil is wound. The third coil faces the first coil. The fourth coil faces the second coil. The first constant-potential node is electrically connected with one end of the third coil. The second constant-potential node is electrically connected with one end of the fourth coil.

Disclosed herein are a number of embodiments for wireless and non-conductive transfers of power and data to electronic devices. These technological advances can be implemented in retail security products (e.g., merchandising display positions for devices such as smart phones, tablet computers, wearables (e.g., smart watches), digital cameras, etc.) as well as docking systems for tablet computers.

Various embodiments of a multi-mode antenna are described. The antenna is preferably constructed having a first inductor coil and a second inductor coil. A plurality of shielding materials are positioned throughout the antenna to minimize interference of the magnetic fields that emanate from the coils from surrounding materials. The antenna comprises a coil control circuit having at least one of an electric filter and an electrical switch configured to modify the electrical impedance of either or both the first and second coils.

An electronic wireless communication device is provided, comprising: a wireless communication means for communicating with a wireless communication initiating device; means for monitoring a communication signal received by the wireless communication means; means for sending at least a first characteristic value relating to the communication signal received by the wireless communication means to at least one other electronic wireless communication device; means for receiving at least a further characteristic value relating to a communication signal received by the at least one other electronic wireless communication device; and processing means for carrying out a comparison based on the first characteristic value and the further characteristic value, wherein the electronic wireless device is configured to selectively activate communication with the wireless communication initiating device based on the result of the comparison. A system and method is also provided for communicating between an electronic wireless communication device of a plurality of electronic wireless communication devices and a wireless communication initiating device that can read one of the electronic wireless communication devices.

The present disclosure relates to a wireless power transmission device. A wireless power transmission device according to an embodiment of the present disclosure includes: a coil part including a plurality of partially overlapping coils; a coil combination generator configured to generate coil combinations including at least one of the plurality of coils; and a controller configured to transmit a coil selection signal through the coil combinations and to select an operating coil combination from the coil combinations based on a response intensity of a response signal for the coil selection signal and charging efficiency of a wireless power reception device. Accordingly, a high-efficiency charging area can be extended in partially overlapping multiple coils.

In an embodiment, a semiconductor device is disclosed that comprises a multiplexer. The multiplexer is configured to receive signals from each of a plurality of transmission coils of a wireless power transmitter as inputs and to output an output signal based at least in part on one of the signals. The semiconductor device further comprises an attenuator connected to the multiplexer that is configured to adjust a voltage of the output signal. The attenuator comprises a variable resistance. The semiconductor device further comprises a plurality of pull down circuits each corresponding to one of the transmission coils. The pull down circuits are configured to selectively clamp the signals received from the corresponding transmission coils to ground.