Wearable device comprising antenna

Abstract

A wearable device according to one embodiment comprises: a ring-shaped housing defining an opening; an electronic component; and an antenna radiator disposed on the outer surface of the electronic component. The antenna radiator includes at least one of a first portion disposed on the outer surface of the electronic component along a first rotational direction, or a second portion disposed on the outer surface of the electronic component along a second rotational direction opposite to the first rotational direction. The first portion of the antenna radiator and the second portion of the antenna radiator are configured to form a magnetic field substantially parallel to the annular axis of the opening when a current flows through the antenna radiator.

Description

Wearable device including an antenna

[0001] The present disclosure relates to a wearable device comprising an antenna.

[0002] A wearable device may be worn on a user's body. For example, the wearable device may include a ring-shaped device worn on a user's finger. The wearable device may have a shape corresponding to the shape of the part worn on the user's body. The wearable device may include an antenna for communicating with an external electronic device or receiving power from a wireless charging device. The antenna may be configured to transmit and / or receive signals or receive power by utilizing a magnetic field formed by a current flowing along the radiator of the antenna.

[0003] The information described above may be provided as background technology for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art in connection with the present disclosure.

[0004] A wearable device is disclosed. The wearable device may include a ring-shaped housing that defines an opening. The wearable device may include an electronic component (e.g., a battery) disposed within the housing. The wearable device may include an antenna radiator disposed on the outer surface of the electronic component. The antenna radiator may include at least one of a first portion disposed along a first rotational direction on the outer surface of the electronic component, or a second portion disposed along a second rotational direction opposite to the first rotational direction on the outer surface of the electronic component. The first portion and the second portion of the antenna radiator may be configured to form a magnetic field substantially parallel to the annular axis of the opening when current flows along the antenna radiator.

[0005] A wearable device is disclosed. The wearable device may include a ring-shaped housing that defines an opening and is made of a metal material and is worn on a user's finger. The wearable device may include a battery disposed within the housing. The wearable device may include an antenna radiator disposed on the outer surface of the battery. The antenna radiator may include a first portion disposed along a first rotational direction on the outer surface of the battery. The antenna radiator may include a second portion disposed along a second rotational direction opposite to the first rotational direction on the outer surface of the battery. The antenna radiator may include a third portion extending from the first portion of the antenna radiator to the second portion of the antenna radiator.

[0006] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments.

[0007] FIG. 2 illustrates a wearable device according to one embodiment.

[0008] FIG. 3 illustrates the interior of a wearable device according to one embodiment.

[0009] FIG. 4 schematically illustrates the housing and electronic components of a wearable device according to one embodiment.

[0010] FIG. 5a illustrates a wearable device according to one embodiment.

[0011] FIG. 5b illustrates a wearable device including a flexible battery.

[0012] FIG. 6 is a perspective view of an electronic component in which an antenna radiator is arranged.

[0013] Figure 7 is an unfolded view of the antenna radiator shown in Figure 5a.

[0014] Figure 8 is a top view of an electronic component with an antenna radiator placed thereon.

[0015] Figure 9 is a bottom view of an electronic component with an antenna radiator placed thereon.

[0016] FIG. 10 is a cross-sectional view of an electronic component with an antenna radiator placed thereon, cut along the line A-A' of FIG. 8.

[0017] Figure 11 illustrates the current flowing along the antenna radiator.

[0018] Figure 12 illustrates a magnetic field formed by an antenna radiator.

[0019] FIG. 13 illustrates a wearable device according to a comparative example.

[0020] FIG. 14 illustrates a magnetic field formed by an antenna radiator of a wearable device according to a comparative example.

[0021] FIG. 15 illustrates a magnetic field formed by an antenna radiator of a wearable device according to one embodiment.

[0022] FIG. 16 illustrates a wireless charging device and a wearable device according to one embodiment.

[0023] FIGS. 17, FIGS. 18, FIGS. 19, FIGS. 20, FIGS. 21, and FIGS. 22 are graphs comparing the strength of a magnetic field around a wearable device according to one embodiment with the strength of a magnetic field around a wearable device according to a comparative example.

[0024] FIG. 23 illustrates a part of a wearable device according to another comparative example.

[0025] FIGS. 24, 25, and 26 illustrate wearable devices according to various embodiments.

[0026] FIGS. 27, FIGS. 28, FIGS. 29, FIGS. 30, FIGS. 31, and FIGS. 32 are graphs comparing the strength of the surrounding magnetic field when wearable devices are worn.

[0027] FIG. 33 illustrates a wearable device according to one embodiment.

[0028] FIG. 34 is an unfolded view of the antenna radiator illustrated in FIG. 33.

[0029] FIG. 35 is a top view of an electronic component with an antenna radiator placed thereon.

[0030] FIG. 36 illustrates a wireless charging device and a wearable device.

[0031] Figure 37 is a top view of an electronic component with an antenna radiator placed thereon.

[0032] Figure 38 is a bottom view of an electronic component with an antenna radiator placed thereon.

[0033] Figures 39 and 40 illustrate an antenna radiator.

[0034] FIGS. 41 and FIGS. 42 illustrate an antenna radiator including a fourth part.

[0035] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment.

[0036] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0037] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0038] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence is performed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0039] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0040] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0041] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0042] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0043] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0044] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0045] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0046] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0047] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0048] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0049] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0050] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0051] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0052] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0053] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) may support a Peak data rate (e.g., 20 Gbps or more) for eMBB realization, loss coverage (e.g., 164 dB or less) for mMTC realization, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for URLLC realization.

[0054] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0055] According to one embodiment, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0056] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0057] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0058] FIG. 2 illustrates a wearable device according to one embodiment.

[0059] Referring to FIG. 2, the aforementioned electronic device (e.g., the electronic device (101) of FIG. 1) may include a wearable device (200). The wearable device (200) may be referred to as a device that can be worn on a user's body. For example, as illustrated in FIG. 2, the wearable device (200) may include a finger-wearing device having a ring-shaped housing (210) that can be worn on a user's finger. In the following description, the wearable device (200) is described as a device having a ring-shaped housing (210), but the wearable device (200) of the present disclosure is not limited thereto. For example, the wearable device (200) may include an earring-shaped device that can be worn on a user's ear, a bracelet-shaped device that can be worn on a user's arm, and / or a headband-shaped device that can be worn on a user's head. For example, the wearable device (200) may be configured to communicate with an external electronic device (e.g., a smartphone) while being worn on the user's body. The housing (210) may alternatively be termed a frame.

[0060] According to one embodiment, the housing (210) may define the appearance of the wearable device (200). The size and shape of the housing (210) may be determined based on the body part of the user on which the wearable device (200) is worn. As previously described, if the wearable device (200) is a finger-wearing device worn on the user's finger, the housing (210) may have a shape that can be worn on the finger. The wearable device (200) may include a ring-shaped housing (210) that defines an opening (211) into which the user's finger can be inserted. The user's finger may be inserted into the opening (211) in a direction substantially parallel to the annular axis (Ax) of the opening (211).

[0061] FIG. 3 illustrates the interior of a wearable device according to one embodiment. FIG. 4 schematically illustrates the housing and electronic components of a wearable device according to one embodiment.

[0062] Referring to FIG. 3, the wearable device (200) may include electronic components disposed within a housing (210). For example, the electronic components may include various electronic components such as a processor (e.g., processor (120) of FIG. 1) disposed on a printed circuit board (330), a wireless communication module (e.g., wireless communication module (192) of FIG. 1), and an antenna module (e.g., antenna module (197) of FIG. 1).

[0063] Since the wearable device (200) is used while being worn on the user's body, the size of the housing (210) may be limited. As described above, if the wearable device (200) is a finger-wearing device worn on the user's finger, the housing (210) of the wearable device (200) may have a size that allows it to be used while being worn on the finger. Because the size of the housing (210) is limited, the arrangement structure of electronic components placed within the housing (210) may be limited. For example, the printed circuit board (330) may include a flexible printed circuit board having flexibility so that it can be bent at least partially to correspond to the shape of the housing (210).

[0064] A wearable device (200) according to one embodiment may include an antenna module (e.g., the antenna module (197) of FIG. 1). A wireless communication module (e.g., the wireless communication module (197) of FIG. 1) may be configured to communicate with an external electronic device using the antenna module. For example, the wearable device (200) may include a sensor configured to acquire a user's biometric information. The wearable device (200) may be configured to transmit the biometric information acquired through the sensor to a user's electronic device (e.g., a smartphone) using the antenna module.

[0065] A wearable device (200) according to one embodiment may be configured to communicate with a wireless charging device or a near field communication (NFC) device. For example, the wearable device (200) may transmit a signal containing information (e.g., payment information) from a processor (e.g., processor (120) of FIG. 1) to an NFC device. The NFC device may communicate with the wearable device (200) based on the signal containing the information. An antenna module of the wearable device (200) may include an NFC antenna.

[0066] For example, the wearable device (200) may be configured to receive power wirelessly from a wireless charging device. For example, the wireless charging device may be referred to as a device that supports one or more of various wireless charging methods, including magnetic resonance or magnetic induction methods. The wearable device (200) may be configured to receive power from the wireless charging device through an antenna module and to charge the battery (310) based on said power. The antenna module of the wearable device (200) may include a wireless charging antenna. The NFC antenna and the wireless charging antenna may share at least a portion of an antenna radiator (e.g., the antenna radiator (320) of FIG. 5a). For example, the antenna radiator (320) of the wearable device (200) may be used as the radiator of the NFC antenna and the radiator of the wireless charging antenna. The antenna module may include a switch circuit (not shown) configured to selectively connect or disconnect at least a portion of the antenna radiator (320) based on the control of a wireless communication module or a power management module (e.g., the power management module (188) of FIG. 1). For example, when the wearable device (200) uses a wireless charging function, the processor may be configured to control the switch circuit to disconnect at least a portion of the antenna radiator (320) shared by the NFC antenna and the wireless charging antenna from the NFC antenna and to connect it to the wireless charging antenna. The antenna radiator (320) may be referred to as an antenna coil capable of transmitting and / or receiving wireless signals.

[0067] Referring to FIG. 4, the housing (210) may include a metal material. For example, the housing (210) may include titanium, but is not limited thereto. The metal material can enhance the rigidity and design of the wearable device (200).

[0068] Since the metal material has electrical conductivity, it can shield or interfere with electromagnetic waves formed by an antenna module (e.g., antenna module (197) of FIG. 1) placed within the housing (210). For example, an antenna radiator (320) placed on a substrate (410) can form (or induce) a magnetic field to receive a signal from an external electronic device (e.g., a smartphone, a card terminal, or a wireless charging device) or to transmit a signal to said external electronic device. Since the antenna radiator (320) is housed within the housing (210), the magnetic field formed (or induced) from the antenna radiator (320) can be shielded by the housing (210). By shielding the magnetic field by the housing (210) which includes an electrically conductive metal material, the strength of the magnetic field identified outside the wearable device (200) can be weak. If the strength of the magnetic field identified outside the housing (210) is weak, the communication performance and wireless charging efficiency of the wearable device (200) may be degraded. For example, for wireless charging of the wearable device (200), if the antenna radiator (320) is placed inside the housing (210) such that the magnetic field formed by the antenna radiator (320) is directed toward the opening of the housing (210) (e.g., the opening (211) of FIG. 2), the wireless charging method of the wearable device (200) may be limited to a charging method using the opening (211).

[0069] According to one embodiment, the housing (210) may not include a non-conductive portion disposed on the outer surface (212) of the housing (210). The non-conductive portion may be referred to as a portion comprising a non-conductive material (e.g., ceramic) different from a metal material. If the housing (210) includes a non-conductive portion, the exterior may not be formed continuously and may be distinguished into a conductive portion and a non-conductive portion. If the housing (210) includes a non-conductive portion, the magnetic field formed from the antenna radiator (320) disposed inside the housing (210) may be identified relatively strongly outside the wearable device (200) through the non-conductive portion. The communication performance and wireless charging efficiency of the wearable device (200) may be improved by the non-conductive part, but the rigidity and design of the wearable device (200) may be degraded by the non-conductive part, and the part of the wearable device (200) capable of communicating with an external electronic device may be limited to the area around the non-conductive part.

[0070] A wearable device (200) according to one embodiment may include an antenna radiator (e.g., an antenna radiator (320) of FIG. 5a) arranged to form a magnetic field in a direction penetrating an opening (e.g., an opening (211) of FIG. 2). For example, when a feed signal is applied to the antenna radiator, the antenna radiator may be configured to form a magnetic field substantially parallel to an annular axis (e.g., an annular axis (Ax) of FIG. 2). In the present disclosure, the magnetic field in a direction penetrating the opening (211) may be referred to as a magnetic field in which the main component of the magnetic field is formed in a direction penetrating the opening (211). The direction penetrating the opening (211) may be referred to as a direction substantially parallel to the annular axis of the opening (211) (e.g., annular axis (Ax) of FIG. 2).

[0071] Hereinafter, the structure of the antenna radiator (320) of the wearable device (200) is described. In the present disclosure, terms indicating relative positions such as top and bottom, and terms indicating relative directions such as first rotation direction and second rotation direction, should be interpreted as relative positions and relative directions. For example, if the wearable device (200) illustrated in the drawings is inverted, the top and bottom may be swapped with each other, and the first rotation direction and second rotation direction may be swapped with each other.

[0072] FIG. 5a illustrates a wearable device according to one embodiment. FIG. 6 is a perspective view of an electronic component in which an antenna radiator is disposed. FIG. 5b illustrates a wearable device including a flexible battery.

[0073] FIG. 5a is a drawing in which a part of the housing (210) is omitted so that the interior of the wearable device (200) can be seen. Referring to FIG. 5a, the antenna radiator (320) of the wearable device (200) may be placed on the outer surface of an electronic component placed within the housing (210). According to one embodiment, the electronic component may include an electronic component having an approximate rectangular shape. For example, the electronic component may include a battery (310) having a rectangular shape. In the following description, the battery (310) is described as an example of an electronic component, but the examples of the present disclosure are not limited thereto. For example, the electronic component on which the antenna radiator (320) described below is placed may be replaced with a component of the wearable device (200) having a rectangular shape. The antenna radiator (320) may be placed on a part of the outer surface of the battery (310). A printed circuit board (330) may be connected to another part of the outer surface of the battery (310) where the antenna radiator (320) is not placed. However, the shape of the battery (310) is not limited to a rectangular shape. Referring to FIG. 5b, the battery (310) may be flexible so that it can be bent at least partially. For example, at least a part of the battery (310) may have a curved surface corresponding to the curved surface of the ring-shaped housing (210). The antenna radiator (320) may be placed on a part of the outer surface of the flexible battery (310). In addition, the battery (310) may have various shapes.

[0074] Referring again to FIG. 5a, the antenna radiator (320) may be configured to form a magnetic field as it is fed from a wireless communication module (e.g., the wireless communication module (192) of FIG. 1). The antenna radiator (320) may be a physical component of an antenna module (e.g., the antenna module (197) of FIG. 1) configured to receive a signal from an external electronic device or to transmit a signal to an external electronic device through the magnetic field. According to one embodiment, the antenna radiator (320) may be placed on the outer surface of the battery (310) to form a magnetic field in a direction substantially parallel to the annular axis (Ax) of the opening (211) that penetrates the opening (211) of the housing (210). The wearable device (200) may include a shielding sheet (540) placed between the outer surface of the electronic component (e.g., the battery (310)) and the antenna radiator (320). The shielding sheet (540) can reduce the effect of the magnetic field formed by the antenna radiator (320) on the electronic component.

[0075] In the following description, a magnetic field in a specific direction may be referred to as a magnetic field in which a component of the magnetic field directed in said specific direction can form a strength sufficient for use in transmitting and / or receiving signals with an external electronic device. For example, a magnetic field substantially parallel to an annular axis (Ax) may be referred to as a magnetic field in which the dominant component of the magnetic field is formed in a direction substantially parallel to the annular axis (Ax). For example, a magnetic field substantially perpendicular to an annular axis (Ax) may be referred to as a magnetic field in which the dominant component of the magnetic field is formed in a direction substantially perpendicular to the annular axis (Ax).

[0076] Referring to FIG. 6, the antenna radiator (320) may include at least one of a first part (510) or a second part (520). The first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320) may be positioned on the outer surface of the battery (310) to form a magnetic field substantially parallel to the annular axis (e.g., the annular axis (Ax) of FIG. 5a) of the opening (e.g., the opening (211) of FIG. 5a). For example, with respect to the direction of the current flowing along the antenna radiator (320), the first part (510) of the antenna radiator (320) may be positioned on the outer surface of the battery (310) along a first rotational direction (e.g., counterclockwise). The first part (510) and the second part (520) may be connected to each other through a third part (530). For example, based on the direction of the current flowing along the antenna radiator (320), a second part (520) of the antenna radiator (320) may be placed on the outer surface of the battery (310) along a second rotational direction (e.g., clockwise) opposite to the first rotational direction.

[0077] According to one embodiment, a first part (510) of the antenna radiator (320) and a second part (520) of the antenna radiator (320) may be arranged to form a substantially rectangular spiral. The first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320) arranged to form a substantially rectangular spiral may each be arranged on three of the six faces of the rectangular battery (310). For example, a rectangular battery (310) may include a first surface (601) (e.g., a top surface facing the +z direction), a second surface (602) (e.g., a bottom surface facing the -z direction), a first side (603) (e.g., a side facing the +y direction), a second side (604) (e.g., a side facing the -y direction), a third side (605) (e.g., a side facing the +x direction), and a fourth side (606) (e.g., a side facing the -x direction). The first surface (601) and the second surface (602) may be opposite to each other. The first side (603) and the second side (604) may be opposite to each other.

[0078] According to one embodiment, a first portion (510) of the antenna radiator (320) may be placed on a portion of the first face (601) of the rectangular prism, a portion of the first side (603) of the rectangular prism, and a portion of the second face (602) of the rectangular prism opposite to the first face (601) of the rectangular prism. A second portion (520) of the antenna radiator (320) may be placed on another portion of the first face (601) of the rectangular prism, a portion of the second side (604) of the rectangular prism opposite to the first side (603) of the rectangular prism, and a portion of the second face (602) of the rectangular prism. A shielding sheet (540) may be placed on the faces (e.g., the first face (601), the second face (602), the first side (603), and the second side (604)) on which the antenna radiator (320) is placed.

[0079] Figure 7 is an unfolded view of the antenna radiator shown in Figure 5a.

[0080] Referring to FIG. 7, the antenna radiator (320) may include a third part (530). The third part (530) of the antenna radiator (320) may physically connect the first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320).

[0081] For example, the third part (530) of the antenna radiator (320) may extend from the first part (510) of the antenna radiator (320) to the third part (530) of the antenna radiator (320). For example, the third part (530) of the antenna radiator (320) may be connected to a feed line (710). The feed line (710) may extend from the first end (701) of the first part (510) of the antenna radiator (320) to the second end (702) of the second part (520) of the antenna radiator (320). The third part (530) can be extended from the third part (703) of the first part (510) of the antenna radiator (320), opposite to the first part (701), to the fourth part (704) of the second part (520) of the antenna radiator (320), opposite to the second part (702).

[0082] According to one embodiment, a third part (530) of the antenna radiator (320) may be connected to a feed line (710) that is electrically connected to at least a part of a wireless communication module (e.g., the wireless communication module (192) of FIG. 1).

[0083] According to one embodiment, the wireless communication module may include an NFC communication circuit (e.g., NFC integrated circuitry) (192a). The NFC communication circuit (192a) may be configured to process NFC signals. A feed line (710) may be configured to electrically connect the NFC communication circuit (192a) and the antenna radiator (320). The feed line (710) may include a first feed line (711) connected to a first point (e.g., a positive feed point) (705) corresponding to a point where current is supplied from the NFC communication circuit (192a), and a second feed line (712) corresponding to a point where current flowing along the antenna radiator (320) is supplied to the NFC communication circuit (192a). Current for feeding the antenna radiator (320) can flow from the NFC communication circuit (192a) to the first part (510) of the antenna radiator (320) through the first feed line (711). The first feed line (711) may be referred to as a positive feed line. After flowing along the antenna radiator (320), the current can flow to the NFC communication circuit (192a) through the second feed line (712). The second feed line (712) may be referred to as a negative feed line.

[0084] According to one embodiment, a portion of the antenna radiator (320) may be placed on the outer surface of the battery (310) by folding along the outer surface of the battery (e.g., battery (310) of FIG. 6).

[0085] For example, a first part (510) of an antenna radiator (320) placed on a part of the first surface (e.g., the first surface (601) of FIG. 6) of the battery (310), a part of the first side (e.g., the first side (603) of FIG. 6) of the battery (310), and a part of the second surface (e.g., the second surface (602) of FIG. 6) of the battery (310) opposite to the first surface (601) of the battery (310) can be folded along a line (L1) corresponding to the corner between the first surface (601) and the first side (603) and a line (L2) corresponding to the corner between the first side (603) and the second surface (602). As the first part (510) of the antenna radiator (320) folds along the lines (L1, L2), a portion (721) of the first part (510) may be placed on the first surface (601) of the battery (310), a portion (722) of the first part (510) may be placed on the first side (603) of the battery (310), and a portion (723) of the first part (510) may be placed on the second surface (602) of the battery (310).

[0086] For example, a second part (520) of an antenna radiator (320) placed on another part of the first side (601) of the battery (310), a part of the second side (e.g., the second side (604) of FIG. 6) of the battery opposite to the first side (603) of the battery (310), and another part of the second side (602) of the battery (310) can be folded along a line (L3) corresponding to the corner between the first side (601) and the second side (604) and a line (L4) corresponding to the corner between the second side (604) and the second side (602). As the second part (520) of the antenna radiator (320) folds along the lines (L3, L4), a portion (731) of the second part (520) may be placed on the first side (601) of the battery (310), a portion (732) of the second part (520) may be placed on the second side (604) of the battery (310), and a portion (733) of the second part (520) may be placed on the second side (602) of the battery (310).

[0087] As illustrated in FIG. 7, with reference to the deployed antenna radiator (320), the first portion (510) of the antenna radiator (320) may be extended along a first rotational direction (e.g., counterclockwise) with respect to the direction of the current flowing along the antenna radiator (320). Depending on the power supply from the NFC communication circuit (192a), current may flow from the NFC communication circuit (192a) to the first portion (510) of the antenna radiator (320). The current may flow from the NFC communication circuit (192a) through the first power supply line (710) to the first end (701) of the first portion (510). The current may flow from the first end (701) of the first portion (510) along the first portion (510) to the third end (703) of the first portion (510). As the first part (510) of the antenna radiator (320) is arranged to form a rectangular spiral wound in the first rotational direction, the direction of the current flowing along the first part (510) of the antenna radiator (320) can flow in the first rotational direction.

[0088] According to one embodiment, the second part (520) of the antenna radiator (320) may extend along a second rotational direction (e.g., clockwise) opposite to the first rotational direction, based on the direction of the current flowing along the antenna radiator (320). The current flowing along the antenna radiator (320) in the first rotational direction may flow from the third end (703) of the first part (510) through the second feed line (712) to the fourth end (704) of the second part (520). The current may flow from the fourth end (704) of the second part (520) along the second part (520) to the second end (702) of the second part (520). As the second part (520) of the antenna radiator (320) is arranged to form a rectangular spiral wound in the second rotational direction, the direction of the current flowing along the second part (520) of the antenna radiator (320) can flow in the second rotational direction.

[0089] FIG. 8 is a top view of an electronic component with an antenna radiator placed thereon. FIG. 9 is a bottom view of an electronic component with an antenna radiator placed thereon. FIG. 10 is a cross-sectional view of an electronic component with an antenna radiator placed thereon, cut along the line A-A' of FIG. 8.

[0090] Referring to FIG. 8, a portion of the first part (510) of the antenna radiator (320) (e.g., portion (721) of FIG. 7) and a portion of the second part (520) of the antenna radiator (320) (e.g., portion (731) of FIG. 7) may be disposed on the first surface (601) of the battery (310). On the first surface (601) of the battery (310), the first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320) may be spaced apart from each other. With respect to a virtual line (801) crossing the third side (605) of the battery (310) and the fourth side (606) of the battery (310), a portion of the first part (510) of the antenna radiator (320) placed on the first side (601) of the battery (310) and a portion of the second part (520) of the antenna radiator (320) placed on the first side (601) of the battery (310) may be symmetrical to each other. The shielding sheet (540) may have a size larger than the size of the antenna radiator (320) placed on the first side (601) of the battery (310) in order to reduce the effect of the magnetic field formed from the antenna radiator (320) on the battery (310).

[0091] Referring to FIG. 9, a portion of the first portion (510) of the antenna radiator (320) (e.g., portion (723) of FIG. 7) and a portion of the second portion (520) of the antenna radiator (320) (e.g., portion (733) of FIG. 7) may be disposed on the second surface (602) of the battery (310). On the second surface (602) of the battery (310), the first portion (510) of the antenna radiator (320) and the second portion (520) of the antenna radiator (320) may be spaced apart from each other. With respect to a virtual line (901) crossing the third side (605) of the battery (310) and the fourth side (606) of the battery (310), the portion of the first part (510) of the antenna radiator (320) placed on the second side (602) of the battery (310) and the portion of the second part (520) of the antenna radiator (320) placed on the second side (602) of the battery (310) may be symmetric to each other. The portion of the first part (510) of the antenna radiator (320) placed on the second side (602) of the battery (310) may be symmetric to the portion of the first part (510) of the antenna radiator (320) placed on the first side (601) of the battery (310) as illustrated in FIG. 8. The part of the second portion (520) of the antenna radiator (320) disposed on the second surface (602) of the battery (310) may be symmetric to the part of the second portion (520) of the antenna radiator (320) disposed on the first surface (601) of the battery (310) as illustrated in FIG. 8.

[0092] Referring to FIG. 10, the antenna radiator (320) may be positioned to at least partially cover three sides of a rectangular battery (310). For example, a shielding sheet (540) may be positioned to at least partially cover a first side (601), a first side (603), a second side (604), and a second side (602) of the battery (310). The antenna radiator (320) may be positioned on the shielding sheet (540) to at least partially cover three sides of the battery (310). The shielding sheet (540) may be configured to reduce electromagnetic interference caused by the magnetic field formed by the antenna radiator (320) to an electronic component (e.g., battery (310)). In FIG. 10, the shielding sheet (540) is shown placed on a portion of the first surface (601) of the battery (310), but the placement structure of the shielding sheet (540) is not limited thereto. For example, the shielding sheet (540) may be placed to cover the entire first surface (601). The shielding sheet (540) may include a material capable of reducing the electromagnetic interference. For example, the shielding sheet (540) may include at least one of a ceramic material (e.g., ferrite), a conductive polymer material, or a metal material, but is not limited thereto.

[0093] FIG. 11 illustrates the current flowing along the antenna radiator. FIG. 12 illustrates the magnetic field formed by the antenna radiator.

[0094] Referring to FIG. 11, the portion of the antenna radiator (320) placed on the first surface (601) and the portion of the antenna radiator (320) placed on the second surface (602) may be symmetrical to each other. For example, a portion of the first portion (510) placed on the first surface (601) (e.g., portion (721) in FIG. 7) may be symmetrical to a portion of the first portion (510) placed on the second surface (602) (e.g., portion (723) in FIG. 7). For example, a portion of the second portion (520) placed on the first surface (601) (e.g., portion (731) in FIG. 7) may be symmetrical to a portion of the second portion (520) placed on the second surface (602) (e.g., portion (733) in FIG. 7).

[0095] Referring to FIG. 11, as the antenna radiator (320) is fed by the NFC communication circuit (192a), current may flow along the antenna radiator (320). The arrows shown in FIG. 11 indicate the direction of the current flowing along the antenna radiator (320). The current may flow from the NFC communication circuit (192a) to the first part (510) of the antenna radiator (320) along the first feed line (711) of the feed line (710). After flowing along the first part (510) of the antenna radiator (320), the current may flow to the second part (520) of the antenna radiator (320). After flowing along the second part (520), the current may flow to the second feed line (712) of the feed line (710). A first part (510) of the antenna radiator (320) may be positioned on the outer surface of the battery (310) in a first rotational direction based on the flow of current. For example, the current flowing along the first part (510) of the antenna radiator (320) may flow from the outer side of the rectangular spiral to the inner side of the rectangular spiral along the first rotational direction. A second part (520) of the antenna radiator (320) may be positioned on the outer surface of the battery (310) in a second rotational direction based on the flow of current. For example, the current flowing along the second part (520) of the antenna radiator (320) may flow from the inner side of the rectangular spiral to the outer side of the rectangular spiral along the second rotational direction.

[0096] According to one embodiment, a magnetic field may be formed by a current flowing along an antenna radiator (320). The antenna radiator (320) may be configured to transmit and / or receive a signal and to receive power through the magnetic field formed by the flow of current.

[0097] Referring to FIG. 12, the magnetic field formed by the current flowing along the antenna radiator (320) positioned on the outer surface of the battery (310) may have a main component in the direction penetrating the opening (211) of the housing (210). For example, the current flowing along the first part (510) of the antenna radiator (320), positioned in a first rotational direction relative to the flow of current, may form a magnetic field directed in a first direction parallel to the annular axis (Ax) of the opening (211). For example, the current flowing along the second part (520) of the antenna radiator (320), positioned in a second rotational direction relative to the flow of current, may form a magnetic field directed in a second direction opposite to the first direction. As the above magnetic fields are formed around the antenna radiator (320), the overall direction of the magnetic field may be formed from the first part (510) of the antenna radiator (320) toward the second part (520) of the antenna radiator (320). The magnetic field formed by the antenna radiator (320) may have a dominant component in a direction parallel to the annular axis (Ax).

[0098] According to one embodiment, as the magnetic field is formed in a direction parallel to the annular axis (Ax), the communication performance and wireless charging efficiency of the wearable device (200) can be improved. For example, since the magnetic field has a dominant component in a direction parallel to the annular axis (Ax) that penetrates the opening (211), the magnetic field can be used to radiate electromagnetic waves in the direction or to receive power in the direction. An antenna radiator (320) can radiate a signal through the magnetic field formed in the direction or receive power through the electromagnetic waves formed in the direction. Since the direction does not face the housing (210) which includes a metal material and substantially penetrates the opening (211), the influence of the housing (210) on the performance of the antenna can be reduced. The wearable device (200) can perform short-range communication or wireless charging by using a magnetic field formed in the above direction, so the communication performance and wireless charging efficiency of the wearable device (200) can be improved.

[0099] FIG. 13 illustrates a wearable device according to a comparative example. FIG. 14 illustrates a magnetic field formed by an antenna radiator of a wearable device according to a comparative example. FIG. 15 illustrates a magnetic field formed by an antenna radiator of a wearable device according to one embodiment. FIG. 16 illustrates a wireless charging device and a wearable device according to one embodiment.

[0100] Referring to FIG. 13, a wearable device (1300) according to a comparative example may include a housing (1310), an electronic component (e.g., a battery (1320)), and an antenna radiator (1330). The housing (1310) is a ring-shaped housing including an opening (1311) and may be substantially identical to the housing (e.g., housing (210) of FIG. 5a) of a wearable device according to one embodiment (e.g., wearable device (200) of FIG. 5a). The battery (1320) is an example of an electronic component having a rectangular shape and may be substantially identical to the battery (e.g., battery (310) of FIG. 5a) of a wearable device (200) according to one embodiment.

[0101] A wearable device (1300) according to a comparative example may include an antenna radiator (1330) disposed on one side (1321) of a battery (1320). The antenna radiator (1330) may be disposed on one side (1321) of the battery (1320) to form a rectangular spiral. For example, one side (1321) of the battery (1320) may be referred to as the side of the battery (1320) facing the opening (1311). When the antenna radiator (1330) is powered by a wireless communication circuit, current may flow along the antenna radiator (1330). The current flowing along the antenna radiator (1330) may form a magnetic field.

[0102] Referring to FIG. 14, in a wearable device (1300) according to a comparative example, a magnetic field (M1) formed by a current flowing along an antenna radiator (1330) may be formed in a direction substantially perpendicular to an annular axis (Ax') penetrating the opening (1311) of a housing (1310) according to Ampere's law (e.g., z-axis direction). Because the magnetic field (M1) has a dominant component in a direction substantially perpendicular to the annular axis (Ax'), the magnetic field (M1) may be formed relatively strongly within the opening (1311), but relatively weakly around the housing (1310) of the wearable device (1300) according to the comparative example.

[0103] In the case of a wearable device (1300) according to a comparative example, when an antenna radiator (1330) placed on a battery (1320) transmits and / or receives a signal or receives power using the magnetic field (M1), the antenna radiator (1330) can transmit and / or receive a signal or receive power through a magnetic field strongly formed within an opening (1311).

[0104] In the case of the wearable device (1300) according to the comparative example, since the magnetic field (M1) is formed relatively strongly within the opening (1311) and relatively weakly around the wearable device (1300) according to the comparative example, in order to wirelessly charge the battery (1320) of the wearable device (1300) according to the comparative example, a dock-type wireless charging device (e.g., the wireless charging device (3600) of FIG. 36) including a charging part (e.g., the charging part (3611) of FIG. 36) inserted into the opening (1311) may be required. The wireless charging device transmits power through the charging part inserted into the opening (1311), and the antenna radiator (1330) of the wearable device (1300) according to the comparative example can receive the power transmitted from the charging part. For example, even if the wearable device (1300) according to the comparative example is placed on a pad-type wireless charging device (e.g., the wireless charging device (1600) of FIG. 16), the charging efficiency of the battery (1320) may be low because the strength of the magnetic field (M1) formed around the housing (1310) is weak.

[0105] If the housing (1310) of the wearable device (1300) according to the comparative example does not include a non-conductive part and includes only a metal material, the communication performance of the wearable device (1300) according to the comparative example may be relatively low. For example, when the wearable device (1300) according to the comparative example performs short-range communication, communication between an external electronic device (e.g., a card terminal) and the wearable device (1300) may not be smooth because the strength of the magnetic field (M1) formed by the antenna radiator (1330) is weak around the housing (1310). Because the strength of the magnetic field (M1) formed around the housing (1310) is weak, the distance at which the antenna radiator (1330) of the wearable device (1300) can recognize the external electronic device may be relatively short. In order for the wearable device (1300) to communicate with an external electronic device, the wearable device (200) may be brought close to the external electronic device so that the wearable device (200) comes into contact with the external electronic device, or the wearable device (200) may be unworn.

[0106] Referring to FIG. 15, in a wearable device (200) according to one embodiment, a magnetic field (M2) formed by a current flowing along an antenna radiator (320) may be formed in a direction substantially parallel to an annular axis (Ax) penetrating the opening (211) of the housing (210) (e.g., in the y-axis direction). Because the magnetic field (M2) has a dominant component in a direction substantially parallel to the annular axis (Ax), the magnetic field (M2) may be formed relatively weakly within the opening (211) but relatively strongly around the housing (210).

[0107] In the case of a wearable device (200) according to one embodiment, when an antenna radiator (320) placed on a battery (310) transmits and / or receives a signal or receives power using the magnetic field (M2), the antenna radiator (320) can transmit and / or receive a signal or receive power through the magnetic field (M2) that is strongly formed around the housing (210).

[0108] In the case of a wearable device (200) according to one embodiment, since a magnetic field (M2) is formed relatively strongly around the housing (210), a pad-type wireless charging device may be used to wirelessly charge the battery (310) of the wearable device (200). Referring to FIG. 16, the wireless charging device (1600) may include a pad (1610) on which the wearable device (200) is placed. The wireless charging device (1600) may not include a structure inserted into the opening (211) of the housing (210). The wireless charging device (1600) may be configured to transmit power through the pad when the wearable device (200) is placed on the pad (1610). A wearable device (200) may be configured to receive power transmitted from a pad using a magnetic field (M2) formed around a housing (210) and to charge a battery (310) using said power. Even if the housing (210) of the wearable device (200) does not include a non-conductive part and includes a metal material, the wearable device (200) can receive power through a magnetic field (M2) formed relatively strongly around the housing (210).

[0109] In the case of a wearable device (200) according to one embodiment, the communication performance of the wearable device (200) can be improved because the magnetic field (M2) is formed relatively strongly around the housing (210). For example, when the wearable device (200) performs short-range communication, communication between an external electronic device (e.g., a card terminal) and the wearable device (200) can be smooth because the strength of the magnetic field (M2) formed by the antenna radiator (320) is strong around the housing (210). Because the strength of the magnetic field (M2) formed around the housing (210) is strong, the distance (e.g., recognition distance) over which the wearable device (200) can recognize the external electronic device using the antenna radiator (320) and provide short-range communication can be relatively long. Because the recognition distance is relatively long, the wearable device (200) can provide improved communication performance by performing short-range communication smoothly.

[0110] Hereinafter, the communication performance of a wearable device (1300) according to a comparative example and the communication performance of a wearable device (200) according to one embodiment are specifically compared.

[0111] FIGS. 17, FIGS. 18, FIGS. 19, FIGS. 20, FIGS. 21, and FIGS. 22 are graphs comparing the strength of a magnetic field around a wearable device according to one embodiment with the strength of a magnetic field around a wearable device according to a comparative example.

[0112] The graphs illustrated in FIGS. 17 to 22 represent the recognition distance at which wearable devices (e.g., a wearable device (200) according to one embodiment of FIG. 5a and a wearable device (1300) according to a comparative example of FIG. 13) can provide short-range communication in a specific direction. For example, when the magnetic field strength in a specific direction is below a threshold value (e.g., about 2 A / m), short-range communication of the wearable devices (200, 1300) may be impossible. The distance at which the magnetic field strength in a specific direction becomes below the threshold value may be referenced as the recognition distance.

[0113] The graph (1700) of FIG. 17 is a graph representing the strength of a magnetic field measured in the upward direction (e.g., +z direction) of wearable devices (200, 1300). The first graph (1701) of FIG. 17 represents the strength of a magnetic field measured in the upward direction of a wearable device (200) according to one embodiment. The second graph (1702) of FIG. 17 represents the strength of a magnetic field measured in the upward direction of a wearable device (1300) according to a comparative example. The x-axis of the graph (1700) represents the distance (or length) (unit: mm) separated from the wearable devices (200, 1300) in the upward direction, and the y-axis of the graph (1700) represents the strength of the magnetic field (unit: A / m).

[0114] Referring to the first graph (1701) of FIG. 17, when the distance from the wearable device (200) according to one embodiment in the upward direction is 0, the magnetic field strength is approximately 60 m / A. The recognition distance in the upward direction of the wearable device (200) according to one embodiment may be approximately 20.2 mm. Referring to the second graph (1702) of FIG. 17, when the distance from the wearable device (1300) according to a comparative example in the upward direction is 0, the magnetic field strength is approximately 3 m / A or less. The recognition distance in the upward direction of the wearable device (1300) according to a comparative example may be approximately 13.3 mm.

[0115] The graph (1800) of FIG. 18 is a graph representing the magnetic field strength measured in one direction (e.g., +x direction) of wearable devices (200, 1300). The first graph (1801) of FIG. 18 represents the magnetic field strength measured in one direction of a wearable device (200) according to one embodiment. The second graph (1802) of FIG. 18 represents the magnetic field strength measured in one direction of a wearable device (1300) according to a comparative example. The x-axis of the graph (1800) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in one direction, and the y-axis of the graph (1800) represents the magnetic field strength (unit: A / m).

[0116] Referring to the first graph (1801) of FIG. 18, when the distance from the wearable device (200) according to one embodiment in one direction is 0, the magnetic field strength is approximately 12 m / A. The recognition distance in one direction of the wearable device (200) according to one embodiment may be approximately 9.2 mm. Referring to the second graph (1802) of FIG. 18, when the distance from the wearable device (1300) according to the comparative example in one direction is 0, the magnetic field strength is approximately 2 m / A. The recognition distance in one direction of the wearable device (1300) according to the comparative example may be approximately 5.6 mm.

[0117] The graph (1900) of FIG. 19 is a graph representing the magnetic field strength measured in the other direction (e.g., -x direction) of the wearable devices (200, 1300). The first graph (1901) of FIG. 19 represents the magnetic field strength measured in the other direction of the wearable device (200) according to one embodiment. The second graph (1902) of FIG. 19 represents the magnetic field strength measured in the other direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (1900) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the other direction, and the y-axis of the graph (1900) represents the magnetic field strength (unit: A / m).

[0118] Referring to the first graph (1901) of FIG. 19, when the distance from the wearable device (200) according to one embodiment in the other direction is 0, the magnetic field strength is approximately 17 m / A. The recognition distance for the other direction of the wearable device (200) according to one embodiment may be approximately 11.7 mm. Referring to the second graph (1902) of FIG. 19, when the distance from the wearable device (1300) according to the comparative example in the other direction is 0, the magnetic field strength is approximately 2 m / A or less. The recognition distance for the other direction of the wearable device (1300) according to the comparative example may be substantially 0 mm. The wearable device (1300) according to the comparative example may not be able to provide communication with an external electronic device in the other direction.

[0119] The graph (2000) of FIG. 20 is a graph representing the magnetic field strength measured in the downward direction (e.g., -z direction) of wearable devices (200, 1300). The first graph (2001) of FIG. 20 represents the magnetic field strength measured in the downward direction of a wearable device (200) according to one embodiment. The second graph (2002) of FIG. 20 represents the magnetic field strength measured in the downward direction of a wearable device (1300) according to a comparative example. The x-axis of the graph (2000) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the downward direction, and the y-axis of the graph (2000) represents the magnetic field strength (unit: A / m).

[0120] Referring to the first graph (2001) of FIG. 20, when the distance from the wearable device (200) according to one embodiment in the downward direction is 0, the magnetic field strength is approximately 20 m / A. The recognition distance in the downward direction of the wearable device (200) according to one embodiment may be approximately 13.7 mm. Referring to the second graph (2002) of FIG. 20, when the distance from the wearable device (1300) according to the comparative example in the downward direction is 0, the magnetic field strength may be substantially 0 m / A. The recognition distance in the downward direction of the wearable device (1300) according to the comparative example may be substantially 0 mm. The wearable device (1300) according to the comparative example may not be able to provide communication with an external electronic device in the downward direction.

[0121] The graph (2100) of FIG. 21 is a graph representing the magnetic field strength measured in the front direction (e.g., +y direction) of wearable devices (200, 1300). The first graph (2101) of FIG. 21 represents the magnetic field strength measured in the front direction of a wearable device (200) according to one embodiment. The second graph (2102) of FIG. 21 represents the magnetic field strength measured in the front direction of a wearable device (1300) according to a comparative example. The x-axis of the graph (2100) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the front direction, and the y-axis of the graph (2100) represents the magnetic field strength (unit: A / m).

[0122] Referring to the first graph (2101) of FIG. 21, when the distance from the wearable device (200) according to one embodiment in the front direction is 0, the magnetic field strength is approximately 90 m / A. The recognition distance in the front direction of the wearable device (200) according to one embodiment may be approximately 23.6 mm. Referring to the second graph (2102) of FIG. 21, when the distance from the wearable device (1300) according to a comparative example in the front direction is 0, the magnetic field strength is approximately 40 m / A. The recognition distance in the front direction of the wearable device (1300) according to a comparative example may be approximately 15.1 mm.

[0123] The graph (2200) of FIG. 22 is a graph representing the strength of a magnetic field measured in the rear direction (e.g., -y direction) of wearable devices (200, 1300). The first graph (2201) of FIG. 22 represents the strength of a magnetic field measured in the rear direction of a wearable device (200) according to one embodiment. The second graph (2202) of FIG. 22 represents the strength of a magnetic field measured in the rear direction of a wearable device (1300) according to a comparative example. The x-axis of the graph (2200) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the rear direction, and the y-axis of the graph (2200) represents the strength of the magnetic field (unit: A / m).

[0124] Referring to the first graph (2201) of FIG. 22, when the distance from the wearable device (200) according to one embodiment in the rear direction is 0, the magnetic field strength is approximately 90 m / A. The recognition distance in the rear direction of the wearable device (200) according to one embodiment may be approximately 23.1 mm. Referring to the second graph (2202) of FIG. 22, when the distance from the wearable device (1300) according to a comparative example in the rear direction is 0, the magnetic field strength is approximately 40 m / A. The recognition distance in the rear direction of the wearable device (1300) according to a comparative example may be approximately 14.0 mm.

[0125] Table 1 below shows the results of the graphs illustrated in FIGS. 17 to 22.

[0126] Location recognition distance (Unit: mm) Improvement amount Wearable device (1300) Wearable device (200) Upper 13.3 20.25 1.9% One side 5.6 9.26 4.3% Other side 0 11.7 - Lower 0 13.7 - Front 15.1 23.6 5 6.3% Rear 14.0 23.16 5.0%

[0127] Referring to Table 1 above, a wearable device (200) according to one embodiment may have higher communication performance than a wearable device (1300) according to a comparative example for all directions. In the upper direction, one side direction, the other side direction, the front direction, and the rear direction, the wearable device (200) according to one embodiment may provide a recognition distance increased by about 51% to about 65% compared to the wearable device (1300) according to a comparative example. In the case of the wearable device (1300) according to a comparative example, communication with an external electronic device is substantially impossible in the other side direction and the lower direction, whereas in the case of the wearable device (200) according to one embodiment, since a recognition distance can be provided in the other side direction and the lower direction, communication with an external electronic device can be provided in the said directions. A wearable device (200) according to one embodiment can provide wireless charging by a pad-type wireless charging device (e.g., the wireless charging device of FIG. 16), and can also provide high communication performance by increasing the recognition distance of short-range communication. Because the strength of the magnetic field formed around the wearable device (200) according to one embodiment is relatively strong, the wearable device (200) can provide high wireless charging efficiency.

[0128] FIG. 23 illustrates a part of a wearable device according to another comparative example. FIG. 24, FIG. 25, and FIG. 26 illustrate wearable devices according to various embodiments.

[0129] Referring to FIG. 23, a wearable device (2300) according to another comparative example may include a housing (2310), a substrate (2320), and an NFC chip (2330). The NFC chip (2330) may be placed on the substrate (2320). The NFC chip (2330) may be used for short-range communication with an external electronic device. The NFC chip (2330) may include a coil-shaped antenna radiator (2331). A portion of the antenna radiator (2331) may be included in the NFC chip (2330), and another portion of the antenna radiator (2331) may be printed on the substrate (2320). The NFC chip (2330) may include, but is not limited to, a radio frequency (RF) front end, an NFC controller, and / or memory. A wearable device (1300) according to a comparative example can perform near-field communication using an NFC chip (2330).

[0130] Referring to FIG. 24, the inner surface (213) of the housing (210), opposite to the outer surface (212) of the housing (210), may face an antenna radiator (320) disposed within the housing (210). Depending on the distance between the antenna radiator (320) disposed on the battery (310) and the inner surface (213) of the housing (210), the distance (e.g., recognition distance) at which the wearable device (200) can recognize an external electronic device using the antenna radiator (320) and provide short-range communication may vary. For example, since the housing (210) includes a metal material, the closer the distance between the inner surface (213) of the housing (210) and the antenna radiator (320), the greater the interference exerted by the housing (210) on the antenna radiator (320). As the interference increases, the recognition distance may decrease.

[0131] FIG. 24 illustrates a wearable device (200) in which the gap between the inner surface (213) of a housing (210) and an antenna radiator (320) is a first gap (G1). Since the housing (210) has a ring shape, the inner surface (213) of the housing (210) may be a curved surface. The gap between the inner surface (213) of the housing (210) and the antenna radiator (320) illustrated in FIG. 24 may be referenced as the maximum gap between the inner surface (213) of the curved surface and the antenna radiator (320). For example, the first gap (G1) may be about 2 mm.

[0132] FIG. 25 illustrates a wearable device (200) in which the distance between the inner surface (213) of the housing (210) and the antenna radiator (320) is a second distance (G2) shorter than the first distance (G1). A portion of the inner surface (213) of the housing (210) facing the antenna radiator (320) may be flat. The distance between the inner surface (213) of the housing (210) and the antenna radiator (320) illustrated in FIG. 25 may be referenced as the maximum distance between the flat inner surface (213) and the antenna radiator (320). For example, the second distance (G2) may be about 1 mm.

[0133] FIG. 26 illustrates a wearable device (200) in which the gap between the inner surface (213) of the housing (210) and the antenna radiator (320) is a third gap (G3) shorter than the second gap (G2). A portion of the inner surface (213) of the housing (210) facing the antenna radiator (320) may be flat. The gap between the inner surface (213) of the housing (210) and the antenna radiator (320) illustrated in FIG. 26 may be referenced as the maximum gap between the flat inner surface (213) and the antenna radiator (320). For example, the second gap (G2) may be about 0.5 mm.

[0134] Table 2 below shows the recognition distance for short-range communication of a wearable device according to a comparative example (e.g., the wearable device (1300) according to the comparative example of FIG. 13), the recognition distance for short-range communication of a wearable device according to another comparative example (e.g., the wearable device (2300) according to another comparative example of FIG. 23), and the recognition distance for short-range communication of a wearable device (200) according to one embodiment. In the case of the wearable device (200) according to one embodiment, the recognition distance according to the distance between the inner surface (213) of the housing (210) and the antenna radiator (320) is described.

[0135] Position recognition distance (unit: mm) also wearable device of 13 also wearable device of 23 also wearable device of 24 (first interval (G1)) also wearable device of 25 (second interval (G2)) also wearable device of 26 (third interval (G3)) Upper 13.3 13.7 20.2 18.5 15.1 Side 5.6 6.4 9.28.18.0 Other side 06.8 11.7 10.7 10.7 Lower 09.8 13.7 14.1 13.6 Front 15.1 17.8 23.6 23.5 23.4 Rear 14.0 19.0 23.1 23.1 23.0

[0136] Referring to Table 2 above, as the distance between the inner surface (213) of the housing (210) and the antenna radiator (320) decreases, even if the recognition distance is reduced, the wearable device (200) according to one embodiment can provide a relatively longer recognition distance than the wearable device (1300) according to a comparative example and the wearable device (2300) according to another comparative example. Since the wearable device (200) according to one embodiment can provide a relatively long recognition distance in all directions, it can have improved communication performance. For example, since the wearable device (200) according to one embodiment can perform short-range communication even at a location relatively far from an external electronic device, it can provide convenience to the user wearing the wearable device (200).

[0137] FIGS. 27, FIGS. 28, FIGS. 29, FIGS. 30, FIGS. 31, and FIGS. 32 are graphs comparing the strength of the surrounding magnetic field when wearable devices are worn.

[0138] The graphs illustrated in FIGS. 27 to 32 represent a recognition distance capable of providing short-range communication in a specific direction when wearable devices (e.g., a wearable device (200) according to one embodiment of FIG. 5a and a wearable device (1300) according to a comparative example of FIG. 13) are worn on a user's body. The recognition distance can be measured by measuring the strength of a magnetic field in a specific direction while the wearable devices (200, 1300) are worn on a user's finger.

[0139] The graph (2700) of FIG. 27 is a graph representing the magnetic field strength measured in the upward direction (e.g., +z direction) of the wearable devices (200, 1300) when the wearable devices (200, 1300) are worn. The first graph (2701) of FIG. 27 represents the magnetic field strength measured in the upward direction of the wearable device (200) according to one embodiment. The second graph (2702) of FIG. 27 represents the magnetic field strength measured in the upward direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (2700) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the upward direction, and the y-axis of the graph (2700) represents the magnetic field strength (unit: A / m).

[0140] Referring to the first graph (2701) of FIG. 27, when the wearable device (200) according to one embodiment is worn, the magnetic field strength is approximately 70 m / A when the distance from the wearable device (200) in the upward direction is 0. When worn on a finger, the recognition distance in the upward direction of the wearable device (200) according to one embodiment may be approximately 15.7 mm. Referring to the second graph (2702) of FIG. 27, when the wearable device (1300) according to a comparative example is worn, the magnetic field strength is approximately 3 m / A or less when the distance from the wearable device (1300) in the upward direction is 0. When worn on a finger, the recognition distance in the upward direction of the wearable device (1300) according to a comparative example may be approximately 11.6 mm.

[0141] The graph (2800) of FIG. 28 is a graph representing the magnetic field strength measured in one direction (e.g., +x direction) of the wearable devices (200, 1300) when the wearable devices (200, 1300) are worn. The first graph (2801) of FIG. 28 represents the magnetic field strength measured in one direction of the wearable device (200) according to one embodiment. The second graph (2802) of FIG. 28 represents the magnetic field strength measured in one direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (2800) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in one direction, and the y-axis of the graph (2800) represents the magnetic field strength (unit: A / m).

[0142] Referring to the first graph (2801) of FIG. 28, when the wearable device (200) according to one embodiment is worn, the magnetic field strength is approximately 13 m / A when the distance from the wearable device (200) in one direction is 0. When worn on a finger, the recognition distance in one direction of the wearable device (200) according to one embodiment may be approximately 8.3 mm. Referring to the second graph (2802) of FIG. 28, when the wearable device (1300) according to a comparative example is worn, the magnetic field strength is approximately 2 m / A when the distance from the wearable device (1300) in one direction is 0. When worn on a finger, the recognition distance in one direction of the wearable device (1300) according to the comparative example may be approximately 5.9 mm.

[0143] The graph (2900) of FIG. 29 is a graph representing the magnetic field strength measured in the other direction (e.g., -x direction) of the wearable devices (200, 1300) when the wearable devices (200, 1300) are worn. The first graph (2901) of FIG. 29 represents the magnetic field strength measured in the other direction of the wearable device (200) according to one embodiment. The second graph (2902) of FIG. 29 represents the magnetic field strength measured in the other direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (2900) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the other direction, and the y-axis of the graph (2900) represents the magnetic field strength (unit: A / m).

[0144] Referring to the first graph (2901) of FIG. 29, when the wearable device (200) according to one embodiment is worn, the magnetic field strength is approximately 19 m / A when the distance from the wearable device (200) in the other direction is 0. When worn on a finger, the recognition distance to the other direction of the wearable device (200) according to one embodiment may be approximately 12.0 mm. Referring to the second graph (2902) of FIG. 29, when the wearable device (1300) according to a comparative example is worn, the magnetic field strength is approximately 2 m / A or less when the distance from the wearable device (1300) in the other direction is 0. When worn on a finger, the recognition distance to the other direction of the wearable device (1300) according to the comparative example may be substantially 0 mm. The wearable device (1300) according to the comparative example may not be able to provide communication with an external electronic device in the other direction while being worn.

[0145] The graph (3000) of FIG. 30 is a graph representing the magnetic field strength measured in the downward direction (e.g., -z direction) of the wearable devices (200, 1300) when the wearable devices (200, 1300) are worn. The first graph (3001) of FIG. 30 represents the magnetic field strength measured in the downward direction of the wearable device (200) according to one embodiment. The second graph (3002) of FIG. 30 represents the magnetic field strength measured in the downward direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (3000) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the downward direction, and the y-axis of the graph (3000) represents the magnetic field strength (unit: A / m).

[0146] Referring to the first graph (3001) of FIG. 30, when the wearable device (200) according to one embodiment is worn, the magnetic field strength is approximately 19 m / A when the distance from the wearable device (200) in the downward direction is 0. When worn on a finger, the recognition distance in the downward direction of the wearable device (200) according to one embodiment may be approximately 14.7 mm. Referring to the second graph (3002) of FIG. 30, when the wearable device (1300) according to a comparative example is worn, the magnetic field strength is substantially 0 m / A when the distance from the wearable device (1300) in the downward direction is 0. When worn on a finger, the recognition distance in the downward direction of the wearable device (1300) according to the comparative example may be substantially 0 mm. The wearable device (1300) according to the comparative example may not be able to provide communication with an external electronic device in the downward direction when worn.

[0147] The graph (3100) of FIG. 31 is a graph representing the magnetic field strength measured in the front direction (e.g., +y direction) of the wearable devices (200, 1300) when the wearable devices (200, 1300) are worn. The first graph (3101) of FIG. 31 represents the magnetic field strength measured in the front direction of the wearable device (200) according to one embodiment. The second graph (3102) of FIG. 31 represents the magnetic field strength measured in the front direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (3100) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the front direction, and the y-axis of the graph (3100) represents the magnetic field strength (unit: A / m).

[0148] Referring to the first graph (3101) of FIG. 31, when the wearable device (200) according to one embodiment is worn, the magnetic field strength is approximately 100 m / A when the distance from the wearable device (200) in the front direction is 0. When worn on a finger, the recognition distance in the front direction of the wearable device (200) according to one embodiment may be approximately 23.6 mm. Referring to the second graph (3102) of FIG. 31, when the wearable device (1300) according to a comparative example is worn, the magnetic field strength is approximately 30 m / A when the distance from the wearable device (1300) in the front direction is 0. When worn on a finger, the recognition distance in the front direction of the wearable device (1300) according to a comparative example may be approximately 15.2 mm.

[0149] The graph (3200) of FIG. 32 is a graph representing the strength of a magnetic field measured in the rear direction (e.g., -y direction) of the wearable devices (200, 1300) when the wearable devices (200, 1300) are worn. The first graph (3201) of FIG. 32 represents the strength of a magnetic field measured in the rear direction of the wearable device (200) according to one embodiment. The second graph (3202) of FIG. 32 represents the strength of a magnetic field measured in the rear direction of the wearable device (1300) according to a comparative example. The x-axis of the graph (3200) represents the distance (unit: mm) separated from the wearable devices (200, 1300) in the rear direction, and the y-axis of the graph (3200) represents the strength of the magnetic field (unit: A / m).

[0150] Referring to the first graph (3201) of FIG. 32, when the wearable device (200) according to one embodiment is worn, the magnetic field strength is approximately 85 m / A when the distance from the wearable device (200) in the rear direction is 0. When worn on a finger, the recognition distance in the rear direction of the wearable device (200) according to one embodiment may be approximately 22.8 mm. Referring to the second graph (3202) of FIG. 32, when the wearable device (1300) according to a comparative example is worn, the magnetic field strength is approximately 35 m / A when the distance from the wearable device (1300) in the rear direction is 0. When worn on a finger, the recognition distance in the rear direction of the wearable device (1300) according to a comparative example may be approximately 14.1 mm.

[0151] Table 3 below shows the results of the graphs illustrated in FIGS. 27 to 32.

[0152] Location recognition distance (Unit: mm) Improvement amount Wearable device (1300) Wearable device (200) Upper 11.6 15.7 35.3% One side 5.9 8.3 40.7% Other side 0 12.0 - Lower 0 14.7 - Front 15.2 23.6 55.3% Rear 14.1 22.8 61.7%

[0153] Referring to Table 3 above, a wearable device according to one embodiment (e.g., the wearable device (200) of FIG. 5a) can have higher communication performance in all directions than a wearable device according to a comparative example (e.g., the wearable device (1300) of FIG. 13) when worn on a user's body. In the upward direction, one-sided direction, other-sided direction, front direction, and rear direction, the wearable device (200) according to one embodiment can provide a recognition distance increased by about 35% to about 62% compared to the wearable device (1300) according to the comparative example when worn. In the case of the wearable device (1300) according to the comparative example, communication with an external electronic device is substantially impossible in the other-sided direction and downward direction when worn, whereas in the case of the wearable device (200) according to one embodiment, since it can provide a recognition distance in the other-sided direction and downward direction, it can provide communication with an external electronic device in these directions.

[0154] FIG. 33 illustrates a wearable device according to one embodiment. FIG. 34 is an unfolded view of an antenna radiator illustrated in FIG. 33. FIG. 35 is a top view of an electronic component in which an antenna radiator is arranged. FIG. 36 illustrates a wireless charging device and a wearable device.

[0155] As described above, the antenna radiator (320) may be configured to transmit and / or receive a signal or receive power through a magnetic field formed by the first part (510) and / or the second part (520). The magnetic field formed by the first part (510) of the antenna radiator (320) and / or the second part (520) of the antenna radiator (320) may be substantially parallel to the annular axis (Ax) of the opening (211). As illustrated in FIG. 16, the wearable device (200) may charge the battery (310) using power provided from a pad-type wireless charging device (e.g., the wireless charging device (1600) of FIG. 16). However, the wireless charging device for charging the battery (310) is not limited to the pad-type wireless charging device described above. As described below, the antenna radiator (320) can be configured to receive power transmitted from a dock-type wireless charging device (e.g., the wireless charging device (3600) of FIG. 36) by forming a magnetic field substantially perpendicular to the ring axis (Ax).

[0156] Referring to FIG. 33, the antenna radiator (320) may include a third part (530) positioned between the first part (510) and the second part (520). As previously described, the antenna radiator (320) may be connected to a feed line (710).

[0157] According to one embodiment, the third part (530) may be configured to form a magnetic field substantially perpendicular to the annular axis (Ax) (e.g., the magnetic field (3301) of FIG. 33) when current flows along the antenna radiator (320). For example, a magnetic field substantially perpendicular to the annular axis (Ax) may be referred to as a magnetic field in which the dominant component of the magnetic field is formed in a direction substantially perpendicular to the annular axis (Ax). The third part (530) may be placed on the first surface (601)) of an electronic component (e.g., battery (310)).

[0158] Referring to FIG. 34, the third part (530) of the antenna radiator (320) can be extended from the first part (510) of the antenna radiator (320) to the second part (520) of the antenna radiator (320).

[0159] According to one embodiment, the feed line (710) may be configured to electrically connect the NFC communication circuit (192a) and the antenna radiator (320). Current may flow along the antenna radiator (320) by the feed from the NFC communication circuit. The current may flow from the first feed line (711) to the first part (510) of the antenna radiator (320). The current may flow along the first part (510). In FIG. 34, the first part (510) may be positioned in a second rotational direction (e.g., a second clockwise direction), and the current may flow in the second rotational direction.

[0160] According to one embodiment, the current may flow to a third part (530) connected to the first part (510) after passing through the first part (510). According to one embodiment, the third part (430) may flow in a first rotational direction (e.g., counterclockwise) with respect to the direction of the current flowing along the antenna radiator (320). After passing through the third part (530), the current may flow to a second part (520) of the antenna radiator (320). After passing through the second part (520), the current may flow to a second feed line (712).

[0161] According to one embodiment, a magnetic field may be formed by a current flowing along a third part (530). Referring to FIG. 35, the third part (530) of the antenna radiator (320) may be positioned on a first surface (601) of the battery (310). The third part (530) may be positioned to form a rectangular spiral wound in a first rotational direction (e.g., counterclockwise) with respect to the flow of current. The current flowing along the third part (530) may flow in the first rotational direction. As the current flows along the third part (530), a magnetic field may be formed. The magnetic field formed by the current flowing along the third part (530) may have a dominant component in the direction in which the first surface (601) faces (e.g., +z direction) according to Ampere's law. Referring again to FIG. 33, the magnetic field (e.g., the magnetic field (3301) of FIG. 33) having a dominant component in the direction in which the first surface (601) faces may have a component substantially perpendicular to the annular axis (Ax). According to one embodiment, as the antenna radiator (320) forms a magnetic field substantially perpendicular to the annular axis (Ax), the antenna radiator (320) can receive power from a pad-type wireless charging device (e.g., the wireless charging device (1600) of FIG. 16) as well as a dock-type wireless charging device (e.g., the wireless charging device (3600) of FIG. 36).

[0162] Referring to FIG. 36, the wearable device (200) may be configured to charge a battery (e.g., the battery (310) of FIG. 3) through a dock-type wireless charging device. The wireless charging device (3600) may include a base (3610) and a cap (3620). The cap (3620) may be rotatably coupled to the base (3610) through a hinge (3630). The wireless charging device (3600) may include a charging portion (3611) protruding from the base (3610). The charging portion (3611) may include a transmitting antenna configured to wirelessly transmit power. The charging portion (3611) may have a cylindrical shape so that the opening (211) of the housing (210) of the wearable device (200) can be inserted. A wearable device (200) may be placed on a base (3610) such that a ring-shaped housing (210) surrounds a charging portion (3611) for charging a battery (310). The charging portion (3611) may be inserted into an opening (211) of the housing (210). A wireless charging device (3600) may wirelessly transmit power through a transmitting antenna placed within the charging portion (3611) when it identifies that the wearable device (200) is located in the charging portion (3611). An antenna radiator (320) placed within the housing (210) may receive power transmitted from the transmitting antenna. The wearable device (200) may be configured to charge the battery (310) using the power. The battery (310) of the wearable device (200) according to one embodiment can be charged via a pad-type wireless charging device (e.g., the wireless charging device (1600) of FIG. 16) or a dock-type wireless charging device (3600), so the usability of the wearable device (200) can be improved.

[0163] FIG. 37 is a top view of an electronic component with an antenna radiator placed thereon. FIG. 38 is a bottom view of an electronic component with an antenna radiator placed thereon.

[0164] Referring to FIGS. 37 and 38, the portion of the antenna radiator (320) placed on the first surface of the battery (310) (e.g., the first surface (601) of FIG. 37) and the portion of the antenna radiator (320) placed on the second surface of the battery (310) (e.g., the second surface (602) of FIG. 38) may be asymmetric. For example, a portion of the first portion (510) placed on the first surface (601) (e.g., portion (721) of FIG. 7) may be asymmetric to a portion of the first portion (510) placed on the second surface (602) (e.g., portion (723) of FIG. 7). For example, a part of the second part (520) placed on the first surface (601) (e.g., part (731) of FIG. 7) may be asymmetric to a part of the second part (520) placed on the second surface (602) (e.g., part (733) of FIG. 7).

[0165] Referring to FIG. 37, a portion of the first part (510) of the antenna radiator (320) and a portion of the second part (520) of the antenna radiator (320) may be disposed on the first surface (601) of the battery (310). With respect to the direction from the first side (603) toward the second side (604) (e.g., the y-axis direction), the length of the portion of the first part (510) disposed on the first surface (601) may be referred to as the first length (L1). With respect to the said direction, the length of the portion of the second part (520) disposed on the first surface (601) may be referred to as the second length (L2).

[0166] Referring to FIG. 38, a portion of the first part (510) of the antenna radiator (320) and a portion of the second part (520) of the antenna radiator (320) may be disposed on the second surface (602) of the battery (310). With respect to the direction from the first side (603) toward the second side (604) (e.g., the y-axis direction), the length of the portion of the first part (510) disposed on the second surface (602) may be referred to as a third length (L3). With respect to the said direction, the length of the portion of the second part (520) disposed on the second surface (602) may be referred to as a fourth length (L4).

[0167] If the portion of the antenna radiator (320) disposed on the first surface (601) of the battery (310) and the portion of the antenna radiator (320) disposed on the second surface (602) of the battery (310) are asymmetrical, the first length (L1) may be different from the second length (L2), and the third length (L3) may be different from the fourth length (L4). For example, the first length (L1) may be longer than the second length (L2). For example, the third length (L3) may be longer than the fourth length (L4). However, it is not limited thereto. As another example, the second length (L2) may be longer than the first length (L1), and the fourth length (L4) may be longer than the third length (L3).

[0168] Figures 39 and 40 illustrate an antenna radiator.

[0169] In the examples described above, the antenna radiator (320) is described as having a structure comprising a first part (510) and a second part (520), but embodiments according to the present disclosure are not limited thereto. For example, the antenna radiator (320) may include at least one of the first part (510) or the second part (520).

[0170] For example, referring to FIG. 39, the antenna radiator (320) may include only a first portion (510). For example, a second portion (e.g., the second portion (520) of FIG. 6) and a third portion (e.g., the third portion (530) of FIG. 6) of the antenna radiator (320) may be omitted. The first portion (510) of the antenna radiator (320) may be arranged to form a rectangular spiral on the outer surface of the battery (310). The first portion (510) of the antenna radiator (320) may be arranged along a first rotational direction (e.g., counterclockwise) with respect to the direction of the current flowing along the antenna radiator (320). When current flows along the first portion (510) of the antenna radiator (320), the magnetic field formed by said current may be substantially parallel to the annular axis (e.g., the annular axis (Ax) of FIG. 5a) of the opening (e.g., the opening (211) of FIG. 5a). In FIG. 39, the antenna radiator (320) is depicted as comprising only the first portion (510), but embodiments of the present disclosure are not limited thereto. For example, the antenna radiator (320) may comprise only the first portion (510), only the second portion (520), or both the first portion (510) and the second portion (520).

[0171] Referring to FIG. 40, the antenna radiator (320) may include a first part (510) and a third part (530). According to one embodiment, the first part (510) of the antenna radiator (320) may be placed on three faces of a rectangular battery (310). For example, the first part (510) of the antenna radiator (320) may be placed on a first face (601), a first side (603), and a second face (602). According to one embodiment, the third part (530) of the antenna radiator (320) may be placed on the first face (601) of the battery (310). A current flowing along the first part (510) of the antenna radiator (320) can form a magnetic field substantially parallel to the annular axis (e.g., the annular axis (Ax) of FIG. 5a) of the opening (e.g., the opening (211) of FIG. 5a). A current flowing along the third part (530) of the antenna radiator (320) can form a magnetic field substantially perpendicular to the annular axis (Ax) of the opening (211) (e.g., the magnetic field (3301) of FIG. 33).

[0172] FIGS. 41 and FIGS. 42 illustrate an antenna radiator including a fourth part.

[0173] Referring to FIG. 41, the antenna radiator (320) may include a first part (510), a third part (530), and a fourth part (4110). For example, the fourth part (4110) of the antenna radiator (320) may be opposite to the third part (530). For example, the third part (530) may be placed on the first surface (601) of the battery (310), and the fourth part (4110) of the antenna radiator (320) may be placed on the second surface (602) of the battery (310). The fourth part (4110) of the antenna radiator (320) may have a shape corresponding to the shape of the third part (530).

[0174] According to one embodiment, when current flows along the antenna radiator (320), the current flowing along the third part (530) of the antenna radiator (320) and the current flowing along the fourth part (4110) of the antenna radiator (320) can form magnetic fields substantially perpendicular to the annular axis (e.g., the annular axis (Ax) of FIG. 5a) of the opening (e.g., the opening (211) of FIG. 5a). The magnetic field (4101) formed by the third part (530) and the fourth part (4110), which are arranged parallel to each other with the battery (310) in between, can be formed in a direction from the third part (530) toward the fourth part (4110). The magnetic field (4101) can strongly form a dominant component in a direction parallel to the annular axis (Ax) of the opening (211).

[0175] Referring to FIG. 42, the antenna radiator (320) may include a first part (510), a second part (520), a third part (530), and a fourth part (4110). Current flowing along the first part (510) of the antenna radiator (320) and current flowing along the second part (520) of the antenna radiator (320) can form a magnetic field substantially parallel to the annular axis (Ax) of the opening (211). Current flowing along the third part (530) of the antenna radiator (320) and current flowing along the fourth part (4110) of the antenna radiator (320) can form a magnetic field substantially perpendicular to the annular axis (Ax) of the opening (211).

[0176] The technical problems to be solved in this disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this disclosure pertains.

[0177] A wearable device (200) is disclosed. The wearable device (200) may include a ring-shaped housing (210) that defines an opening (211). The wearable device (200) may include an electronic component (e.g., a battery) disposed within the housing (210). The wearable device (200) may include an antenna radiator (320) disposed on the outer surface of the electronic component. The antenna radiator (320) may include at least one of a first part (510) disposed along a first rotational direction on the outer surface of the electronic component, or a second part (520) disposed along a second rotational direction opposite to the first rotational direction on the outer surface of the electronic component. The first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320) may be configured to form a magnetic field substantially parallel to the annular axis (Ax) of the opening (211) when current flows along the antenna radiator (320). For example, when a feed signal is applied to the antenna radiator (320), the first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320) may be configured to form a magnetic field substantially parallel to the annular axis (Ax) of the opening (211).

[0178] As a non-limiting example, the first portion (510) of the antenna radiator (320) may be arranged to form a rectangular spiral extending in the first rotational direction. The second portion (520) of the antenna radiator (320) may be arranged to form a rectangular spiral extending in the second rotational direction. For example, the first portion (510) and the second portion (520) may be wound to form a rectangular spiral. The direction of extension of the rectangular spiral may correspond to the direction of current flowing along the antenna radiator (320).

[0179] As an example not limited to, the electronic component may have a rectangular shape. The first part (510) of the antenna radiator (320) may be placed on a part of the first face (601) of the electronic component, a part of the first side (603) of the electronic component, and a part of the second face (602) of the electronic component opposite to the first face (601) of the electronic component. The second part (520) of the antenna radiator (320) may be placed on another part of the first face (601) of the electronic component, a part of the second side (604) of the electronic component opposite to the first side (603) of the electronic component, and another part of the second face (602) of the electronic component.

[0180] As an example not limited to, the antenna radiator (320) may include a third part (530) extending from the first part (510) of the antenna radiator (320) to the second part (520) of the antenna radiator (320).

[0181] As an example not limited to, the wearable device (200) may further include a feed line (710). The feed line (710) may include a first feed line (711) extending from the NFC communication circuit (192a) to a first end (701) of the first part (510) of the antenna radiator (320), and a second feed line (712) extending from a second end (702) of the second part (520) of the antenna radiator (320) to the NFC communication circuit (192a). The third portion (530) of the antenna radiator (320) can be extended from the third portion (703) of the first portion (510) of the antenna radiator (320), which is opposite to the first portion (701) of the first portion (510) of the antenna radiator (320), to the fourth portion (704) of the second portion (520) of the antenna radiator (320), which is opposite to the second portion (702) of the second portion (520) of the antenna radiator (320).

[0182] As a non-limiting example, the third portion (530) of the antenna radiator (320) may be positioned on the second surface (602) of the electronic component to form a magnetic field substantially perpendicular to the annular axis (Ax) when current flows along the antenna radiator (320).

[0183] As a non-limiting example, the antenna radiator (320) may include a fourth part (4110) disposed on the first surface (601) of the electronic component to form a magnetic field that is opposite to the third part (530) of the antenna radiator (320) and substantially perpendicular to the annular axis (Ax) when current flows along the antenna radiator (320).

[0184] As a non-limiting example, the fourth portion (4110) of the antenna radiator (320) may be arranged to form a rectangular spiral.

[0185] As a non-limiting example, the antenna radiator (320) may include a third part (530) which is connected to the first part (510) of the antenna radiator (320) and disposed on one side of the battery (310) to form a magnetic field substantially perpendicular to the annular axis (Ax) when current flows along the antenna radiator (320). The third part (530) of the antenna radiator (320) may be disposed to form a rectangular spiral.

[0186] As an example not limited to, the wearable device (200) may further include a shielding sheet (540) disposed between the outer surface of the electronic component and the antenna radiator (320). The shielding sheet (540) may be configured to reduce electromagnetic interaction between the antenna radiator (320) and the electronic component (e.g., battery).

[0187] As a non-limiting example, the electronic component may include a battery (310) having a rectangular shape. Since the battery (310) has a rectangular shape, the antenna radiator (320) may be placed on the outer surface of the battery (310) so that it forms a rectangular spiral.

[0188] As an example not limited to, the housing (210) may include a metal material. The metal material can improve the rigidity and aesthetics of the housing (210).

[0189] As a non-limiting example, the housing (210) may not include a non-conductive portion comprising a non-conductive material disposed on the outer surface (212) of the housing (210). For example, the electronic device may include a non-conductive portion disposed on the outer surface of the housing so that a magnetic field formed from an antenna radiator inside the housing, formed of a metal material, can be identified from outside the housing. The non-conductive portion may weaken the rigidity of the housing and impair the aesthetics of the electronic device. A wearable device (200) according to one embodiment may not include a non-conductive portion disposed on the outer surface of the housing (210) because it can form a magnetic field parallel to an amphic axis. Since the wearable device (200) does not include the non-conductive portion, the rigidity and aesthetics of the wearable device (200) may be improved.

[0190] As an example not limited to, the antenna radiator (320) may be configured to wirelessly receive power transmitted from a charging device. For example, the antenna radiator (320) may be configured to function as a radiator for a wireless charging antenna.

[0191] As a non-limiting example, the antenna radiator (320) may be configured to function as a radiator for an NFC (near field communication) antenna.

[0192] A wearable device (200) is disclosed. The wearable device (200) may include a ring-shaped housing (210) that includes a metal material and defines an opening (211) so as to be worn on a user's finger. The wearable device (200) may include a battery (310) disposed within the housing (210). The wearable device (200) may include an antenna radiator (320) disposed on the outer surface of the battery (310). The antenna radiator (320) may include a first portion (510) disposed along a first rotational direction on the outer surface of the battery (310). The antenna radiator (320) may include a second portion (520) disposed along a second rotational direction opposite to the first rotational direction on the outer surface of the battery (310). The antenna radiator (320) may include a third part (530) extending from the first part (510) of the antenna radiator (320) to the second part (520) of the antenna radiator (320).

[0193] As a non-limiting example, the first portion (510) of the antenna radiator (320) may be arranged to form a rectangular spiral extending in the first rotational direction. The second portion (520) of the antenna radiator (320) may be arranged to form a rectangular spiral extending in the second rotational direction.

[0194] As an example not limited to, the current flowing along the antenna radiator (320) may be configured to flow from the first part (510) of the antenna radiator (320), through the third part (530) of the antenna radiator (320), to the second part (520) of the antenna radiator (320). For example, the first part (510) of the antenna radiator (320) and the second part (520) of the antenna radiator (320) may be electrically and physically connected through the third part (530) of the antenna radiator (320).

[0195] As an example not limited to, the battery (310) may have a rectangular shape. The first part (510) of the antenna radiator (320) may be placed on a part of the first surface (601) of the battery (310), a part of the first side (603) of the battery (310), and a part of the second surface (602) of the battery (310) opposite to the first surface (601) of the battery (310). The second part (520) of the antenna radiator (320) may be placed on another part of the first surface (601) of the battery (310), a part of the second side (604) of the battery (310) opposite to the first side (603) of the battery (310), and another part of the second surface (602) of the battery (310). The third portion (530) of the antenna radiator (320) may be placed on the second surface (602) of the battery (310).

[0196] As an example not limited to, the first portion (510) of the antenna radiator (320) and the second portion (520) of the antenna radiator (320) may be configured to form a magnetic field substantially parallel to the annular axis (Ax) of the opening (211) when current flows along the antenna radiator (320). The third portion (530) of the antenna radiator (320) may be configured to form a magnetic field substantially perpendicular to the annular axis (Ax) when current flows along the antenna radiator (320).

[0197] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0198] The electronic devices according to the various embodiments disclosed in this document may be of various forms. The electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, electronic devices, or consumer electronics. The electronic devices according to the embodiments of this document are not limited to the devices described above.

[0199] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0200] The term “module” as used in the various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0201] Various embodiments of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (120) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0202] According to one embodiment, the method according to the various embodiments disclosed herein may be provided as included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store's server, or a relay server's memory (130).

[0203] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In a wearable device, A ring-shaped housing defining an opening; Electronic components disposed within the above housing; and An antenna radiator disposed on the outer surface of the electronic component, the antenna radiator comprises at least one of a first portion disposed along a first rotational direction on the outer surface of the electronic component, or a second portion disposed along a second rotational direction opposite to the first rotational direction on the outer surface of the electronic component. The first part of the antenna radiator and the second part of the antenna radiator are When current flows along the antenna radiator, it is configured to form a magnetic field substantially parallel to the annular axis of the opening. Wearable device.

2. In Paragraph 1, The first part of the above antenna radiator is, It is arranged to form a rectangular spiral extending in the first rotational direction, and The second part of the above antenna radiator is, Arranged to form a rectangular spiral extending in the second rotational direction, Wearable device.

3. In Paragraph 1 or 2, The above electronic component is, Having a rectangular shape, The first part of the above antenna radiator is, A portion of the first surface of the electronic component, a portion of the first side of the electronic component, and a portion of the second surface of the electronic component opposite to the first surface of the electronic component are disposed thereon, The second part of the above antenna radiator is, Another part of the first side of the electronic component, a part of the second side of the electronic component opposite to the first side of the electronic component, and disposed on the other part of the second side of the electronic component, Wearable device.

4. In any one of paragraphs 1 through 3, The above antenna radiator is, A third portion extending from the first portion of the antenna radiator to the second portion of the antenna radiator, Wearable device.

5. In Paragraph 4, The above-mentioned wearable device is, It further includes a power supply line, and the said power supply line is, A first feed line extending from an NFC (near field communication) communication circuit to a first terminal of the first part of the antenna radiator, and Includes a second feed line extending from the second end of the second part of the antenna radiator to the NFC communication circuit. The third part of the above antenna radiator is, Extending from the third end of the first part of the antenna radiator, opposite to the first end of the first part of the antenna radiator, to the fourth end of the second part of the antenna radiator, opposite to the second end of the second part of the antenna radiator. Wearable device.

6. In Paragraph 5, The third part of the above antenna radiator is, A second surface of the electronic component disposed to form a magnetic field substantially perpendicular to the annular axis when current flows along the antenna radiator, Wearable device.

7. In Paragraph 6, The above antenna radiator is, A fourth portion disposed on the first surface of the electronic component to form a magnetic field opposite to the third portion of the antenna radiator and substantially perpendicular to the annular axis when current flows along the antenna radiator, comprising Wearable device.

8. In Paragraph 7, The fourth part of the above antenna radiator is, Arranged to form a rectangular spiral, Wearable device.

9. In any one of paragraphs 1 through 8, The above antenna radiator is, It includes a third part connected to the first part of the antenna radiator and disposed on one side of the battery to form a magnetic field substantially perpendicular to the annular axis when current flows along the antenna radiator, and The third part of the above antenna radiator is, Arranged to form a rectangular spiral, Wearable device.

10. In any one of paragraphs 1 through 9, A shielding sheet further comprising the outer surface of the electronic component and the antenna radiator. Wearable device.

11. In any one of paragraphs 1 through 10, The above electronic component is, A battery having a rectangular shape, Wearable device.

12. In any one of paragraphs 1 through 11, The above housing is, including metal material, Wearable device.

13. In any one of paragraphs 1 through 12, The above housing is, A non-conductive portion comprising a non-conductive material disposed on the outer surface of the above housing, which does not include Wearable device.

14. In any one of paragraphs 1 through 13, The above antenna radiator is, Configured to wirelessly receive power transmitted from a charging device, Wearable device.

15. In any one of paragraphs 1 through 14, The above antenna radiator is, Configured to function as a radiator of an NFC (near field communication) antenna, Wearable device.

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