Patent Publication Number: US-2023163449-A1

Title: Wearable electronic device including variable ground

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of International Application No. PCT/KR2022/013511 designating the United States, filed on Sep. 8, 2022, in the Korean Intellectual Property Receiving Office and claiming priority to Korean Patent Application No. 10-2021-0177533, filed on Dec. 13, 2021 Korean Patent Application No. 10-2021-0151523, filed on Nov. 5, 2021, and in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Various embodiments of the present disclosure relate to a wearable electronic device including a variable ground. 
     2. Description of Related Art 
     Various wearable electronic devices for providing an augmented reality (AR) service are available in the market. An AR service is a service of superimposing a virtual image having supplementary information on a real-world image seen by a user and showing the superimposition result, and may provide a user with a virtual object image including content related to a real object identified from the real-world image. An electronic device providing an AR service may operate while worn by a user. For example, wearable electronic devices may include an eye glasses-type electronic device that is mounted on the head of a user and allows the user to view virtual objects provided by an AR service. 
     SUMMARY 
     An antenna in an eye glasses-type wearable electronic device may be implemented using a frame. In general, an antenna is fixed and connected to a frame. Thus, a substantially uniform radiation pattern is generated. A uniform radiation pattern may cause a lack of adaptability of a user to various communication environments. 
     Various embodiments solve the limitations of substantially uniform radiation patterns generated by conventional wearable electronic AR device by providing a wearable electronic AR device that generates various radiation patterns to improve adaptability in various communication environments. 
     Various embodiments may implement a variable ground by utilizing metal portions of a frame. 
     In various embodiments, a wearable electronic device  400  may include: a frame including a front, a first leg, a second leg, and at least one metal portion; the front  411  with a lens  414  connected thereto, and including a first metal portion  4111  among the at least one metal portion; the first leg  412  connected to one end of the front  411  through a first hinge  421 , and including a second metal portion  4121  among the at least one metal portion; the second leg  413  connected to an other end of the front  411  through a second hinge  422 ; a PCB  430  including a ground portion  431  electrically connected to the first metal portion  4111  or the second metal portion  4121 ; an antenna structure  440  including a radiating element  441  and a feeder  442  electrically connected to the radiating element  441 ; a first switch circuit  451  configured to electrically connect or disconnect the first metal portion  4111  and the second metal portion  4121  or to change an impedance for connecting the first metal portion  4111  and the second metal portion  4121 ; and a controller  460  configured to control the first switch circuit  451 . 
     In various embodiments, a wearable electronic device  400  may include: a frame including a front, a first leg, a second leg, and at least one metal portion; the front  411  with a lens  414  connected thereto, and including a first metal portion  4111  among the at least one metal portion; the first leg  412  connected to one end of the front  411  through a first hinge  421 , and including a second metal portion  4121  among the at least one metal portion; the second leg  413  connected to an other end of the front  411  through a second hinge  422 ; a PCB  430  including a ground portion  431  electrically connected to the first metal portion  4111 , the PCB  430  positioned inside the first leg  412 ; an antenna structure  440  including a radiating element  441  and a feeder  442  electrically connected to the radiating element  441 ; a first switch circuit  451  configured to electrically connect or disconnect the first metal portion  4111  and the second metal portion  4121 ; and a controller  460  configured to control the first switch circuit  451 . 
     According to various embodiments, it is possible to change the length of a ground using metal portions of a frame. 
     According to various embodiments, it is possible to generate various radiation patterns using a variable ground. 
     According to various embodiments, it is possible to improve adaptability in various communication environments and improve communication quality. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a block diagram of an electronic device in a network environment according to various embodiments; 
         FIG.  2    is a view illustrating a structure of a wearable electronic device according to an embodiment; 
         FIG.  3    is a diagram illustrating an operation of an eye tracking camera included in a wearable electronic device according to an embodiment; 
         FIG.  4 A  is a perspective view schematically illustrating a wearable electronic device according to an embodiment; 
         FIG.  4 B  is a plan view schematically illustrating an antenna structure included in a wearable electronic device according to an embodiment; 
         FIG.  4 C  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment; 
         FIG.  4 D  is simulation data illustrating radiation patterns of a signal radiated according to a state of a first switch circuit in an unfolded state of a wearable electronic device according to an embodiment; 
         FIG.  4 E  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment; 
         FIG.  4 F  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit and a second switch circuit in an unfolded state of a wearable electronic device according to an embodiment; 
         FIG.  4 G  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit, a second switch circuit, a third switch circuit, and a fourth switch circuit in an unfolded state of a wearable electronic device according to an embodiment; 
         FIG.  4 H  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit and a second switch circuit in a folded state of a wearable electronic device according to an embodiment; 
         FIG.  5 A  is a perspective view schematically illustrating a wearable electronic device according to an embodiment; 
         FIG.  5 B  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment; 
         FIG.  5 C  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit and a second switch circuit in an unfolded state of a wearable electronic device according to an embodiment; 
         FIG.  5 D  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment; 
         FIG.  5 E  is a plan view schematically illustrating a wearable electronic device according to an embodiment; and 
         FIG.  5 F  is a block diagram schematically illustrating a connection relationship between components of a wearable electronic device according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. When describing the embodiments with reference to the accompanying drawings, like reference numerals refer to like elements and a repeated description related thereto will be omitted. 
       FIG.  1    is a block diagram illustrating an electronic device  101  in a network environment  100  according to various embodiments. Referring to  FIG.  1   , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or communicate with at least one of an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , a memory  130 , an input module  150 , a sound output module  155 , a display module  160 , an audio module  170 , a sensor module  176 , an interface  177 , a connecting terminal  178 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module (SIM)  196 , or an antenna module  197 . In some embodiments, at least one (e.g., the connecting terminal  178 ) of the above components may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In some embodiments, some (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) of the components may be integrated as a single component (e.g., the display module  160 ). 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  connected to the processor  120 , and may perform various data processing or computation. According to an embodiment, as at least a portion of data processing or computation, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in a volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in a non-volatile memory  134 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)) or an auxiliary processor  123  (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently of, or in conjunction with the main processor  121 . For example, when the electronic device  101  includes the main processor  121  and the auxiliary processor  123 , the auxiliary processor  123  may be adapted to consume less power than the main processor  121  or to be specific to a specified function. The auxiliary processor  123  may be implemented separately from the main processor  121  or as a portion of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) of the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state or along with the main processor  121  while the main processor  121  is in an active state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an ISP or a CP) may be implemented as a portion of another component (e.g., the camera module  180  or the communication module  190 ) that is functionally related to the auxiliary processor  123 . According to an embodiment, the auxiliary processor  123  (e.g., an NPU) may include a hardware structure specified for artificial intelligence (AI) model processing. An AI model may be generated by machine learning. Such learning may be performed by, for example, the electronic device  101  in which an artificial intelligence model is executed, or performed via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. An artificial neural network may include, for example, 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), and a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more thereof, but is not limited thereto. The artificial intelligence model may additionally or alternatively, include a software structure other than the hardware structure. 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . The non-volatile memory  134  may include an internal memory  136  and an external memory  138 . 
     The program  140  may be stored as software in the memory  130 , and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input module  150  may receive a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . 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). 
     The sound output module  155  may 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 playing multimedia or playing record. The receiver may be used to receive an incoming call. According to an embodiment, the receiver may be implemented separately from the speaker or as a portion of the speaker. 
     The display module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display module  160  may include, for example, a control circuit for controlling a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, the hologram device, and the projector. According to an embodiment, the display module  160  may include a touch sensor adapted to sense a touch, or a pressure sensor adapted to measure an intensity of a force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal or vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input module  150  or output the sound via the sound output module  155  or an external electronic device (e.g., an electronic device  102  such as a speaker or a headphone) directly or wirelessly connected to the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     The connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected to an external electronic device (e.g., the electronic device  102 ). According to an embodiment, the connecting 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). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or an electrical stimulus which may be recognized by a user via his or her tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image and moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, ISPs, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to an embodiment, the power management module  188  may be implemented as, for example, at least a portion of a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently of the processor  120  (e.g., an AP) and that support a direct (e.g., wired) communication or a wireless communication. According to an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module, or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device  104  via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the SIM  196 . 
     The wireless communication module  192  may support a 5G network after a 4G network, and next-generation communication technology, e.g., new radio (NR) access technology. The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communications (mMTC), or ultra-reliable and low-latency communications (URLLC). The wireless communication module  192  may support a high-frequency band (e.g., a mmWave band) to achieve, e.g., a high data transmission rate. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as, e.g., beamforming, massive multiple-input and multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module  192  may support various requirements specified in the electronic device  101 , an external electronic device (e.g., the electronic device  104 ), or a network system (e.g., the second network  199 ). According to an embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 Gbps or more) for implementing eMBB, loss coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of 1 ms or less) for implementing URLLC. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element including a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module  197  may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in a communication network, such as the first network  198  or the second network  199 , may be selected by, for example, the communication module  190  from the plurality of antennas. The signal or the power may be transmitted or received between the communication module  190  and the external electronic device via the at least one selected antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as a portion of the antenna module  197 . 
     According to various embodiments, the antenna module  197  may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a PCB, an RFIC disposed on a first surface (e.g., a bottom surface) of the PCB or adjacent to the first surface and capable of supporting a designated a high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., a top or a side surface) of the PCB, or adjacent to the second surface and capable of transmitting or receiving signals in the designated high-frequency band. 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the external electronic devices  102  or  104  may be a device of the same type as or a different type from the electronic device  101 . According to an embodiment, all or some of operations to be executed by the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , and  108 . For example, if the electronic device  101  needs to perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request one or more external electronic devices to perform at least portion of the function or the service. The one or more external electronic devices receiving the request may perform the at least portion of the function or the service requested, or an additional function or an additional service related to the request, and may transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least portion of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra low-latency services using, e.g., distributed computing or mobile edge computing. In one 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 a neural network. According to an embodiment, the external electronic device  104  or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
       FIG.  2    is a view illustrating a structure of a wearable electronic device according to an embodiment. 
     Referring to  FIG.  2   , a wearable electronic device  200  (e.g., the electronic device  101  or  102  of  FIG.  1   ) may be worn on a face of a user to provide the user with an image associated with an augmented reality (AR) service and/or a virtual reality (VR) service. 
     In one embodiment, the wearable electronic device  200  may include a first display  205 , a second display  210 , screen display portions  215   a  and  215   b , input optical members  220   a  and  220   b , a first transparent member  225   a , a second transparent member  225   b , lighting units  230   a  and  230   b , a first board  235   a , a second board  235   b , a first hinge  240   a , a second hinge  240   b , an imaging camera  245 , a plurality of microphones (e.g., a first microphone  250   a , a second microphone  250   b , and a third microphone  250   c ), a plurality of speakers (e.g., a first speaker  255   a , and a second speaker  255   b ), a battery  260 , a first recognition camera  265   a , a second recognition camera  265   b , a first eye detection camera  270   a , a second eye detection camera  270   b , temples  271   a  and  271   b , rims  272   a  and  272   b , and a bridge  273 . 
     In one embodiment, a display (e.g., the first display  205  and the second display  210 ) may include, for example, a liquid crystal display (LCD), a digital mirror device (DMD), or a liquid crystal on silicon (LCoS), an organic light-emitting diode (OLED), a micro light-emitting diode (micro LED), or the like. Although not shown in the drawings, when the display  205 ,  210  is one of an LCD, a DMD, and an LCoS, the wearable electronic device  200  may include a light source configured to emit light to a screen output area of the display  205 ,  210 . In one embodiment, when the display  205 ,  210  is capable of generating light by itself, for example, when the display  205 ,  210  is either an OLED or a micro-LED, the wearable electronic device  200  may provide a virtual image with a relatively high quality to the user even though a separate light source is not included. For example, when the display  205 ,  210  is implemented as an OLED or a micro-LED, a light source may be unnecessary, and accordingly the wearable electronic device  200  may be lightened. Hereinafter, the display  205 ,  210  capable of generating light by itself may be referred to as a “self-luminous display”, and description will be made on the assumption of the self-luminous display. 
     The display  205 ,  210  according to various embodiments may include at least one micro-LED. For example, the micro LED may express red (R), green (G), and blue (B) by emitting light by itself, and a single chip may implement a single pixel (e.g., one of R, G, and B pixels) because the micro LED is relatively small in size (e.g., 100 μm or less). Accordingly, it may be possible to provide a high resolution without a backlight unit (BLU), when the display  205 ,  210  is implemented as a micro-LED. However, embodiments are not limited thereto, and a single chip may be implemented by a plurality of pixels including R, G, and B pixels. The display  205 ,  210  may also be referred to as a “light source”. 
     In one embodiment, the display  205 ,  210  may include pixels for displaying a virtual image. The display  205 ,  210  may further include infrared pixels that emit infrared light. 
     In one embodiment, the display  205 ,  210  may further include light-receiving pixels (e.g., photo sensor pixels) that are disposed between pixels and configured to receive light reflected from eyes of a user, convert the received light to electrical energy, and output the electrical energy. Referring to  FIG.  3   , for example, a light-receiving pixel may be referred to as an “eye tracking sensor”. The eye tracking sensor (e.g., an eye tracking sensor  315  of  FIG.  3   ) may sense infrared light generated by reflecting light emitted by an infrared pixel included in the display  205 ,  210  by eyes of a user. 
     The wearable electronic device  200  may detect a gaze direction (e.g., a movement of a pupil) of the user, using light receiving pixels  315 . For example, the wearable electronic device  200  may detect and track a gaze direction of a left eye and a gaze direction of a right eye of the user through one or more light-receiving pixels  315  of the first display  205  and one or more light-receiving pixels  315  of the second display  210 . The wearable electronic device  200  may also determine a central position of a virtual image according to the gaze directions of the left eye and the right eye of the user (e.g., directions in which pupils of the left eye and the right eye of the user gaze) detected through the one or more light-receiving pixels  315 . 
     With continued reference to  FIGS.  2  and  4   , the wearable electronic device  200  may include the display  205 ,  210 , the first transparent member  225   a  and/or the second transparent member  225   b . A user may use the wearable electronic device  200  while wearing the wearable electronic device  200  on his or her face. According to an embodiment, the first transparent member  225   a  may be disposed to face the left eye of the user, and the second transparent member  225   b  may be disposed to face the right eye of the user. According to various embodiments, when the display  205 ,  210  is transparent, the display  205 ,  210  may be disposed to face an eye of the user to configure the screen display portion  215   a ,  215   b.    
     The first display  205  and the second display  210  may each include a first control circuit (not shown). The first control circuit may control the first display  205  or the second display  210 . The first control circuit may control an operation of a liquid crystal element of a transparent cover (not shown) included in the first display  205  or the second display  210 . In one embodiment, light emitted from the display  205 ,  210  may reach the screen display portion  215   a  formed on the first transparent member  225   a  that faces the left eye of the user, and the screen display portion  215   b  formed on the second transparent member  225   b  that faces the right eye of the user, by passing through a lens (not shown) and a waveguide (e.g., a display waveguide  350  and an eye tracking waveguide  360  of  FIG.  3   ). 
     The lens (not shown) may be disposed in front of the display  205 ,  210 . The lens (not shown) may include a concave lens and/or a convex lens. For example, the lens (not shown) may include a projection lens (e.g., a projection lens  325  of  FIG.  3   ), or a collimation lens (not shown). 
     In one embodiment, the light emitted from the display  205 ,  210  may be guided by the waveguide  350 ,  360  through the input optical member  220   a ,  220   b . Light traveling in the waveguide  350 ,  360  may be guided toward the eyes of the user through the output optical member (e.g., the output optical member  340  of  FIG.  3   ). The screen display portion  215   a ,  215   b  may be determined based on light emitted toward an eye of a user (e.g., an eye  301  of the user of  FIG.  3   ). 
     For example, the light emitted from the display  205 ,  210  may be reflected from a grating area of the waveguide  350 ,  360  formed in the input optical member  220   a ,  220   b  and the screen display portion  215   a ,  215   b , and may be transmitted to the eye  301  of the user. 
     In one embodiment, the screen display portion  215   a ,  215   b  or a transparent member (e.g., the first transparent member  225   a , the second transparent member  225   b ) may include a reflective lens, and a lens including the waveguide  350 ,  360 . The waveguide  350 ,  360  may function to transmit a light source generated by the display  205 ,  210  to an eye of the user, and may be referred to as an “optical waveguide”. Hereinafter, an “optical waveguide” or “waveguide” may correspond to the screen display portion  215   a ,  215   b.    
     The screen display portion  215   a ,  215   b  may be a path through which external light is incident, totally reflected, and emitted, and may be distinguished from the first transparent member  225   a  and the second transparent member  225   b  through which external light is simply reflected or transmitted. 
     In one embodiment, the screen display portion  215   a ,  215   b  may be formed of glass, plastic, or a polymer, and may have a nanopattern formed on one surface of the inside or outside, for example, a grating structure of a polygonal or curved shape. According to an embodiment, light incident to one end of the screen display portion  215   a ,  215   b  through the input optical member  220   a ,  220   b  may be propagated inside the display waveguide  350  by the nanopattern to be provided to the user. For example, the screen display portion  215   a ,  215   b  including a freeform prism may provide incident light to a user through a reflection mirror. 
     The screen display portion  215   a ,  215   b  may include at least one of a reflective element (e.g., a reflection mirror) and at least one diffractive element (e.g., a diffractive optical element (DOE) or a holographic optical element (HOE)). The screen display portion  215   a ,  215   b  may guide light emitted from a display (e.g., the first display  205  and the second display  210 ) to the eyes of the user, using the at least one diffractive element or the reflective element included in the screen display portion  215   a ,  215   b.    
     According to various embodiments, the diffractive element may include the input optical member  220   a ,  220   b  and/or an output optical member (e.g., the output optical member  340  of  FIG.  3   ). For example, the input optical member  220   a ,  220   b  may refer to an input grating area, and the output optical member  340  may refer to an output grating area. The input grating area may function as an input terminal to diffract (or reflect) light output from the display  205 ,  210  (e.g., a micro LED) to transmit the light to the screen display portion  215   a ,  215   b . The output grating area may function as an exit to diffract (or reflect) light transmitted to the waveguide  350 ,  360  to the eye  301  of the user. 
     According to various embodiments, the reflective element may include a total reflection optical element or a total reflection waveguide for total internal reflection (TIR). For example, total reflection, which is one of schemes of inducing light, may form an angle of incidence such that light (e.g., a virtual image) entering through an input grating area is completely or almost completely reflected from one portion (e.g., a specific surface) of the screen display portion  215   a ,  215   b , to completely or almost completely transmit the light to an output grating area. 
     The first transparent member  225   a  and/or the second transparent member  225   b  may be formed as, for example, a glass plate, a plastic plate, or a polymer, and may be transparently or translucently formed. According to an embodiment, the first transparent member  225   a  may be disposed to face the left eye of the user, and the second transparent member  225   b  may be disposed to face the right eye of the user. 
     According to one or more non-limiting embodiments, lighting unit  230   a ,  230   b  may be used differently according to the position in which the lighting unit  230   a ,  230   b  is attached. For example, the lighting unit  230   a ,  230   b  may be attached in the vicinity of the rim  272   a ,  272   b  of the wearable electronic device  200 . The lighting unit  230   a ,  230   b  may be used as an auxiliary device for facilitating eye-gaze detection when pupils are captured using the eye tracking camera  270   a ,  270   b . The lighting unit  230   a ,  230   b  may use an IR LED with a visible light wavelength or an infrared light wavelength. 
     Alternatively, the lighting unit  230   a ,  230   b  may be attached in the vicinity of a hinge (e.g., the first hinge  240   a , the second hinge  240   b ) connecting the rim  272   a ,  272   b  and a temple  271   a ,  271   b  corresponding to a leg portion of glasses of the wearable electronic device  200  or in the vicinity of a camera (e.g., the first recognition camera  265   a , the second recognition camera  265   b ) mounted adjacent to the bridge  273  connecting the rims  272   a  and  272   b . Here, the camera  265   a ,  265   b  may be, for example, a global shutter (GS) camera, but is not limited thereto. 
     If image capturing is performed using a global shutter (GS) camera, the lighting unit  230   a ,  230   b  may be used to supplement a surrounding brightness. For example, the lighting unit  230   a ,  230   b  may be used in a dark environment or when it is not easy to detect a subject to be captured due to reflected light and mixing of various light sources. 
     In one embodiment, the lighting unit  230   a ,  230   b  may also be omitted. The lighting unit  230   a ,  230   b  may be replaced by infrared pixels included in the first display  205 , the second display  210 . In one embodiment, the lighting unit  230   a ,  230   b  may be included in the wearable electronic device  200  to assist infrared pixels included in the first display  205 , the second display  210 . 
     A PCB (e.g., the first board  235   a , the second board  235   b ) may be disposed in the frame of the wearable electronic device  200  such as the temple  271   a ,  271   b , for example, and transmit an electrical signal to each module (e.g., a camera, a display, an audio, or a sensor) and another PCB through a flexible printed circuit board (FPCB). According to various embodiments, at least one PCB may include the first board  235   a , the second board  235   b , and an interposer (not shown) disposed between the first board  235   a  and the second board  235   b.    
     In one embodiment, a control circuit (not shown) for controlling components of the wearable electronic device  200  other than the first display  205 , the second display  210  may be positioned on a PCB (e.g., the first board  235   a , the second board  235   b ). The control circuit may control the components other than the first display  205 , the second display  210  and perform an operation such as depth value estimation. The control circuit may include a communication circuit (e.g., the communication module  190  of  FIG.  1   ) or a memory (e.g., the memory  130  of  FIG.  1   ). The control circuit may control the first display  205 , the second display  210 , and/or the other components. 
     The hinge  240   a ,  240   b  may correspond to a portion connecting the temple  271   a ,  271   b  and the rim  272   a ,  272   b  of the wearable electronic device  200 . 
     In one embodiment, the imaging camera  245  may be referred to as a “high resolution (HR)” or a “photo video (PV)”, and may include a high-resolution camera. The imaging camera  245  may include a color camera having functions for obtaining a high-quality image, such as an automatic focus (AF) function and an optical image stabilizer (OIS). Embodiments are not limited thereto, and the imaging camera  245  may include a GS camera or a rolling shutter (RS) camera. 
     In one embodiment, a plurality of microphones (e.g., the first microphone  250   a , the second microphone  250   b , and the third microphone  250   c ) may process an external acoustic signal into electrical audio data. The processed audio data may be variously utilized according to a function (or an application being executed) being performed by the wearable electronic device  200 . 
     In one embodiment, a plurality of speakers (e.g., the first speaker  255   a  and the second speaker  255   b ) may output audio data that is received from a communication circuit (e.g., the communication module  190  of  FIG.  1   ) or stored in a memory (e.g., the memory  130  of  FIG.  1   ). 
     In one embodiment, one or more batteries  260  may be included, and may supply power to the components constituting the wearable electronic device  200 . 
     In one embodiment, the first recognition camera  265   a  and the second recognition camera  265   b  may include cameras used for three degrees of freedom (3DoF) and six degrees of freedom (6DoF) head tracking, hand detection and tracking, and gesture and/or space recognition. For example, the first recognition camera  265   a  and the second recognition camera  265   b  may each include a GS camera to detect a movement of a head or a hand and track the movement. For example, a stereo camera may be used for head tracking and space recognition, and accordingly two GS cameras with the same standard and performance may be used. An RS camera may be used to detect a quick hand movement and a minute movement of a finger and track a movement. In one embodiment, a GS camera having superior performance (e.g., image drag) in comparison to a camera may be mainly used. However, embodiments are not limited thereto. According to various embodiments, an RS camera may also be used. The first recognition camera  265   a  and the second recognition camera  265   b  may perform a simultaneous localization and mapping (SLAM) function through depth capturing and spatial recognition for 6DoF. In addition, the first recognition camera  265   a  and the second recognition camera  265   b  may perform a user gesture recognition function. 
     In one embodiment, at least one sensor (not shown, e.g., a gyro sensor, an acceleration sensor, a geomagnetic sensor, and/or a gesture sensor), the first recognition camera  265   a , and the second recognition camera  265   b  may perform at least one of head tracking for 6DoF, pose estimation and prediction, gesture and/or space recognition, and a function of a SLAM through depth imaging. 
     In one embodiment, the first recognition camera  265   a  and the second recognition camera  265   b  may be classified and used as a camera for head tracking and a camera for hand tracking. 
     In one embodiment, the first eye tracking camera  270   a  and the second eye tracking camera  270   b  may detect and track pupils. The first eye tracking camera  270   a  and the second eye tracking camera  270   b  may be used so that the center of a virtual image projected on the wearable electronic device  200  may be positioned according to the gaze directions of the pupils of a user wearing the wearable electronic device  200 . For example, as the first eye tracking camera  270   a  and the second eye tracking camera  270   b , a GS camera may be mainly used to detect a pupil and track a fast pupil movement. The first eye tracking camera  270   a  may be installed to correspond to the left eye of the user, and the second eye tracking camera  270   b  may be installed to correspond to the right eye of the user. Here, the first eye tracking camera  270   a  and the second eye tracking camera  270   b  may have the same camera performance and specifications. However, embodiments are not limited thereto. The operation of an eye tracking camera (e.g., the first eye tracking camera  270   a , the second eye tracking camera  270   b ) will be described in more detail with reference to  FIG.  3    below. 
       FIG.  3    is a diagram illustrating an operation of an eye tracking (ET) camera included in a wearable electronic device according to an embodiment.  FIG.  3    illustrates a process in which an eye tracking camera  310  (e.g., the first eye tracking camera  270   a , the second eye tracking camera  270   b  of  FIG.  2   ) of a wearable electronic device  300  according to an embodiment tracks the eye  301  of the user, that is, a gaze of the user, using light (e.g., infrared light) output from a display  320  (e.g., the first display  205 , the second display  210  of  FIG.  2   ). 
     The eye tracking camera  310  may include the eye tracking (ET) sensor  315 . The eye tracking sensor  315  may be included inside the eye tracking camera  310 . The eye tracking sensor  315  may detect first reflected light that is generated when reflected infrared light  303  is reflected from the eye  301  of the user. The eye tracking camera  310  may track the eye  301  of the user, that is, the gaze of the user, based on a detection result of the eye tracking sensor  315 . 
     The display  320  may include a plurality of visible light pixels and a plurality of infrared pixels. The visible light pixels may include red (R), green (G), and blue (B) pixels. The visible light pixels may output visible light corresponding to a virtual object image. The infrared pixels may output infrared light. The display  320  may include, for example, micro LEDs, or OLEDs. 
     The wearable electronic device  300  may perform gaze tracking using the infrared light output from the display  320 . The projection lens  325  may be disposed between the display  320  and an input optical member  330  (e.g., the input optical member  220   a ,  220   b  of  FIG.  2   ). 
     The infrared light output from the display  320  may be incident on the input optical member  330  through the projection lens  325 , and may be separated into the reflected infrared light  303  and transmitted infrared light  305  by a half mirror (not shown) included in the input optical member  330 . 
     The half mirror may be formed in the entire area or a partial area of the input optical member  330 . When the half mirror is formed in the entire area of the input optical member  330 , the input optical member  330  may also be referred to as a “half mirror”. The half mirror may be disposed in the input optical member  330  of the display waveguide  350 . The half mirror may be disposed inside or below the input optical member  330 . The half mirror may include a grating structure. 
     The half mirror may output reflected infrared light and transmitted infrared light in response to the infrared light output from the display  320 . The half mirror may include a grating structure. The grating structure may output reflected infrared light directly toward the eye  301  of the user by reflecting a portion of the output infrared light, or may output the reflected infrared light  303  toward the eye  301  of the user through the output optical member  340  by passing through the display waveguide  350 . Also, the grating structure may output the transmitted infrared light  305  by transmitting another portion of the output infrared light. 
     The reflected infrared light  303  may be output directly toward the eye  301  of the user. The reflected infrared light  303  may be output toward the eye  301  of the user through the output optical member  340  by passing through the display waveguide  350 . The transmitted infrared light  305  may be output toward the real world. The transmitted infrared light  305  may be incident on a real object and may be partially reflected from the real object. 
     The display waveguide  350  and the eye tracking waveguide  360  may be included in a transparent member  370  (e.g., the first transparent member  225   a , the second transparent member  225   b  of  FIG.  2   ). The transparent member  370  may be formed as, for example, a glass plate, a plastic plate, or a polymer, and may be transparently or translucently formed. The transparent member  370  may be disposed to face an eye of a user. In this case, a distance between the transparent member  370  and the eye  301  of the user may be referred to as an “eye relief”  380 . 
     The transparent member  370  may include the waveguides  350  and  360 . The transparent member  370  may include the input optical member  330  and the output optical member  340 . In addition, the transparent member  370  may include an eye tracking splitter  375  that splits the input light into several waveguides. 
     The display waveguide  350  is separate from the input optical member  330  as shown in  FIG.  3   . However, embodiments are not limited thereto. The input optical member  330  may also be included in the display waveguide  350 . 
     In addition, the output optical member  340  is separate from the eye tracking waveguide  360  as shown in  FIG.  3   . However, embodiments are not limited thereto. The output optical member  340  may also be included in the eye tracking waveguide  360 . 
     An optical waveguide (e.g., the display waveguide  350 , the eye tracking waveguide  360 ) may output a virtual object image by adjusting a path of visible light. Visible light and infrared light output from the display  320  may be incident on the input optical member  330  through the projection lens  325 . The visible light among the light incident on the input optical member  330  may be totally reflected through the display waveguide  350  to be guided to the output optical member  340 . The visible light may be output from the output optical member  340  toward the eye  301  of the user. 
     The wearable electronic device  300  may reflect or transmit the infrared light output from the display  320  through the half mirror. In one embodiment, the wearable electronic device  300  may output the reflected infrared light  303  that is reflected by the half mirror (not shown) directly toward the eye  301  of the user, or may output the reflected infrared light  303  passing through the display waveguide  350  toward the eye  301  of the user. In one embodiment, the wearable electronic device  300  may output the transmitted infrared light  305  passing through the half mirror toward the real object. A reflectivity and a transmittance of the half mirror may be adjusted. For example, the half mirror may have a reflectivity of 30% (e.g., reflection toward eyes of a user) and a transmittance of 70% (e.g., output toward a real object) with respect to infrared light. However, the reflectivity and the transmittance are merely examples and may be adjusted in various ratios. 
     In one embodiment, the wearable electronic device  300  may output the reflected infrared light  303  toward eyes of the user through the half mirror and the infrared pixels included in the display  320 . The reflected infrared light  303  may be reflected from the eye  301  of the user, and the eye tracking sensor  315  may detect the reflected light. The display  320  including the infrared pixels, and the half mirror included in the display waveguide  350  may be used instead of a separate infrared light source for detecting a real object. Since the separate infrared light source is not used, the wearable electronic device  300  may be lightened and power consumption may be reduced. In addition, the display  320  including the infrared pixels may function as an auxiliary light source to increase an image quality of a stereo camera (e.g., the first recognition camera  265   a  and the second recognition camera  265   b  of  FIG.  2   ) in a low-illuminance environment and increase an accuracy of depth information. 
     Alternatively, the wearable electronic device  300  may output infrared light through the display  320  and detect light reflected from the real object through a stereo camera (e.g., the first recognition camera  265   a  and the second recognition camera  265   b  of  FIG.  2   ). The wearable electronic device  300  may estimate a distance to the real object based on a detection result. For example, the wearable electronic device  300  may measure a depth value or use a time of flight (ToF) scheme to estimate the distance to the real object. 
     The wearable electronic device  300  (e.g., the wearable electronic device  200  of FIG.  2 ) may provide AR to a user. The wearable electronic device  300  may provide an image representing the real world through the transparent waveguide  360 , while transferring a virtual object image output from the display  320  toward eyes of the user through the waveguide  350 . 
     The wearable electronic device  300  may include, but is not limited to, for example, a head-mounted display (HMD), a face-mounted display (FMD), a smart eye glass-wear or a headset that provides extended reality such as AR, VR, or mixed reality. 
     According to an embodiment, the wearable electronic device  300  may output infrared light using the display  320  including the infrared pixels. The wearable electronic device  300  may track a gaze of a user, using the infrared light output from the display  320 . In addition, the wearable electronic device  300  may estimate a distance to a real object, using the infrared light output from the display  320 . 
     The electronic device according to various embodiments may be one of various types of electronic devices. The electronic device may include, for example, a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. According to an embodiment of the disclosure, the electronic device is not limited to those described above. 
     It should be appreciated that various embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. In connection with the description of the drawings, like reference numerals may be used for similar or related components. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, “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”, each of which may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may simply be used to distinguish the component from other components in question, and do not limit the components in other aspects (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with”, “coupled to”, “connected with”, or “connected to” another element (e.g., a second element), it means that the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used in connection with various embodiments of the disclosure, the term “module” may include a unit implemented in hardware, software, or firmware, and may interchangeably be used with other terms, for example, “logic”, “logic block”, “part”, or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. For example, according to an embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Various embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., an internal memory  136  or an external memory  138 ) that is readable by a machine (e.g., the electronic device  101 ) For example, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a compiler or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term “non-transitory” simply means that the storage medium is a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an embodiment, a method according to various embodiments of the disclosure may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smart phones) directly. If distributed online, at least portion of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     According to various embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. According to various embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, according to various embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to various embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
     With continued reference to the drawings,  FIG.  4 A  is a perspective view schematically illustrating a wearable electronic device according to an embodiment.  FIG.  4 B  is a plan view schematically illustrating an antenna structure included in a wearable electronic device according to an embodiment.  FIG.  4 C  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment.  FIG.  4 D  is simulation data illustrating radiation patterns of a signal radiated according to a state of a first switch circuit in an unfolded state of a wearable electronic device according to an embodiment. 
     Referring to  FIG.  4 A to  4 D , a wearable electronic device  400  (e.g., the wearable electronic device  200  of  FIG.  2   ) according to an embodiment may be worn on the body (e.g., the head) of a user. For example, the wearable electronic device  400  may substantially include a shape of glasses. 
     The wearable electronic device  400  may include a frame  410 , lenses  414 , a first hinge  421 , a second hinge  422 , a PCB  430 , an antenna structure  440 , a first switch circuit  451  and/or a controller  460 . 
     In one embodiment, the frame  410  may form an exterior of the electronic device  400 . The frame  410  may provide a space in which various components of the wearable electronic device  400  are disposed. For example, the frame  410  may include a front  411 , a first leg  412 , and a second leg  413 . 
     In one embodiment, the front  411  may form an exterior of a front surface (e.g., a surface in a +x direction) of the wearable electronic device  400 . The lenses  414  (e.g., the first transparent member  225   a  and/or the second transparent member  225   b  of  FIG.  2   ) may be disposed on the front  411 . For example, the front  411  may include rims (e.g., the rims  272   a  and  272   b  of  FIG.  2   ) in which the lenses  414  are disposed, and a bridge (e.g., the bridge  273  of  FIG.  2   ) connecting the pair of rims  272   a  and  272   b . The front  411  may include a first metal portion  4111 . For example, at least a portion of the front  411  may be formed of metal. For example, the front  411  itself may be formed of metal, or the front  411  may be formed by injection and a metal structure may be disposed therein. For example, the first metal portion  4111  may include at least one metal portion of the front  411 , a ground layer of a PCB (e.g., an FPCB) (not shown) disposed on the front  411 , and/or a metal structure (e.g., a SUS structure) disposed on the front  411 . However, the first metal portion  4111  is not limited thereto, and the first metal portion  4111  may be any metal portion disposed inside and/or outside the front  411 . 
     In one embodiment, the first leg  412  (e.g., the temple  271   a  of  FIG.  2   ) and the second leg  413  (e.g., the temple  271   b  of  FIG.  2   ) may form leg portions of the wearable electronic device  400 . In one embodiment, various components may be disposed inside and/or outside the first leg  412  and/or the second leg  413 . 
     In one embodiment, the first leg  412  may include a second metal portion  4121 . For example, at least a portion of the first leg  412  may be formed of metal. For example, the first leg  412  itself may be formed of metal, or the first leg  412  may be formed by injection and a metal structure may be disposed therein. For example, the second metal portion  4121  may include at least one metal portion of the first leg  412 , a ground layer (e.g., a ground portion  431 ) of the PCB  430  disposed on the first leg  412 , and/or a metal structure (e.g., a SUS structure) disposed on the first leg  412 . However, the second metal portion  4121  is not limited thereto, and the second metal portion  4121  may be any metal portion disposed inside and/or outside the first leg  412 . 
     In one embodiment, the second leg  413  may include a third metal portion  4131 . For example, at least a portion of the second leg  413  may be formed of metal. For example, the second leg  413  itself may be formed of metal, or the second leg  413  may be formed by injection and a metal structure may be disposed therein. For example, the third metal portion  4131  may include at least one metal portion of the second leg  413 , a ground layer of a PCB (e.g., an FPCB) (not shown) disposed on the second leg  413 , and/or a metal structure (e.g., a SUS structure) disposed on the second leg  413 . However, the third metal portion  4131  is not limited thereto, and the third metal portion  4131  may be any metal portion disposed inside and/or outside the second leg  413 . 
     In one embodiment, the first leg  412  may be connected to one end (e.g., an end in a +y direction) of the front  411  through the first hinge  421  (e.g., the first hinge  240   a  of  FIG.  2   ). The first leg  412  may be folded or unfolded relative to the front  411  through the first hinge  421 . The second leg  413  may be connected to the other end (e.g., an end in a −y direction) of the front  411  through the second hinge  422  (e.g., the second hinge  240   b  of  FIG.  2   ). The second leg  413  may be folded or unfolded relative to the front  411  through the second hinge  422 . The first hinge  421  and/or the second hinge  422  may be at least partially formed of metal. The first hinge  421  may electrically connect the first metal portion  4111  and the second metal portion  4121 . For example, the first hinge  421  may be electrically connected to the first metal portion  4111  and the second metal portion  4121  through a connecting member (e.g., a C-Clip). The second hinge  422  may electrically connect the first metal portion  4111  and the third metal portion  4131 . For example, the second hinge  422  may be electrically connected to the first metal portion  4111  and the third metal portion  4131  through a connecting member (e.g., a C-Clip). Meanwhile, the state of the electrical connection between the first metal portion  4111  and the second metal portion  4121  may be changed by a first switch circuit (e.g., the first switch circuit  451  of  FIG.  4 C ), which will be described later, and the electrical connection between the first metal portion  4111  and the third metal portion  4131  may be changed by a second switch circuit (e.g., a second switch circuit  452  of  FIG.  4 E ), which will be described later. The first metal portion  4111 , the second metal portion  4121 , and/or the third metal portion  4131  may substantially function as a ground of the antenna structure  440  according to a state of the electrical connection therebetween. A detailed description thereof will be provided later. 
     In one embodiment, the PCB  430  (e.g., the first substrate  235   a  and/or the second substrate  235   b  of  FIG.  2   ) may be disposed inside the frame  410 . For example, the PCB  430  may be disposed inside the first leg  412  and/or the second leg  413 . However, this is merely an example, and the PCB  430  may be disposed on the front  411  as shown in  FIGS.  5 A to  5 F . The PCB  430  may include the ground portion  431 . For example, the ground portion  431  may be a metal layer formed of a conductive member. The ground portion  431  may be electrically connected to the first metal portion  4111  and/or the second metal portion  4121 . For example, the ground portion  431  may be connected to the first metal portion  4111  and/or the second metal portion  4121  through a connecting member (e.g., a C-Clip). For example, when the PCB  430  is disposed inside the first leg  412 , the ground portion  431  may be electrically connected to the second metal portion  4121  of the first leg  412 . However, this is merely an example, and the position of the PCB  430  and the metal portion to which the ground portion  431  is electrically connected are not limited thereto. A detailed description of the metal portion electrically connected to the ground portion  431  will be described later. 
     In one embodiment, the antenna structure  440  (e.g., the antenna module  197  of  FIG.  1   ) may transmit and/or receive signals. At least a portion of the antenna structure  440  may be disposed on the PCB  430  or may be electrically connected to the PCB  430 . For example, the antenna structure  440  may be integrally formed with the PCB  430  by being connected thereto, or may be formed as a separate component from the PCB  430  and connected to the PCB  430 . 
     In one embodiment, the antenna structure  440  may include a radiating element  441 , a feeder  442 , and/or a matching circuit  443 . The radiating element  441  may be an element for radiating a signal, and at least a portion thereof may be formed of a metal portion. The feeder  442  may be electrically connected to the radiating element  441  to transmit an electrical signal to the radiating element  441 . For example, the feeder  442  may be electrically connected to the radiating element  441  through a connecting member (e.g., a C-Clip). The matching circuit  443  may be a circuit for impedance matching. The matching circuit  443  may correct an impedance difference between two connection terminals. However, this is merely an example, and the configuration of the antenna structure  440  is not limited thereto. For example, the antenna structure  440  may include a ground portion where the radiating element  441  is electrically connected to the ground portion  431  of the PCB  430 . For example, the ground portion may be implemented by a third switch circuit  453  and/or a fourth switch circuit  454  which will be described later. Meanwhile, the shape of the radiating element  441  shown in  FIG.  4 B  is merely an example, and the shape of the radiating element  441  is not limited thereto. 
     In one embodiment, the first switch circuit  451  may be positioned between the first metal portion  4111  of the front  411  and the second metal portion  4121  of the first leg  412 . For example, the first switch circuit  451  may be positioned between the first hinge  421  and the second metal portion  4121 . However, this is merely an example, and the first switch circuit  451  may also be positioned between the first hinge  421  and the first metal portion  4111 . For example, the first switch circuit  451  may be connected to the first hinge  421  and/or the first metal portion  4111  through a connecting member (e.g., a C-Clip). 
     In one embodiment, the first switch circuit  451  may electrically connect or disconnect the first metal portion  4111  and the second metal portion  4121 , or change an impedance for connecting the first metal portion  4111  and the second metal portion  4121 . The first switch circuit  451  may include at least one path. For example, the first switch circuit  451  may include a closed path  4511 , an open path  4512 , and/or a lumped element path  4513 . The lumped element path  4513  may be formed of any one or a combination of a resistive element, a capacitive element, and an inductive element. A single or a plurality of lumped element paths  4513  may be formed. A plurality of lumped element paths  4513   a  and  4513   b  may be set to have different impedances. However, this is merely an example, and the paths of the first switch circuit  451  are not limited thereto. Further, although  FIG.  4 C  illustrates two lumped element paths  4513   a  and  4513   b , this is merely an example, and the number of lumped element paths  4513  is not limited thereto. 
     In one embodiment, the controller  460  may control the first switch circuit  451 . The controller  460  may select any one of the plurality of paths of the first switch circuit  451 . The controller  460  may control the first switch circuit  451  to change the impedance and/or the electrical length of the metal portion connected to the ground portion  431 . In one or more non-limiting embodiments, the length of the metal portion refers to a total amount of metal that is connected to the ground portion  431  based on a total number of the metal portions described herein that are connected to the ground portion  431 . For example, when the open path  4512  is selected in the first switch circuit  451 , the first metal portion  4111  and the second metal portion  4121  may be electrically disconnected from each other. In this case, the ground portion  431  may be electrically connected only to the second metal portion  4121 . For example, when the closed path  4511  is selected in the first switch circuit  451 , the first metal portion  4111  and the second metal portion  4121  may be electrically connected to each other. In this case, the ground portion  431  may be electrically connected to at least the second metal portion  4121  and the first metal portion  4111 . For example, in a case where the first metal portion  4111  is electrically connected to the third metal portion  4131  through the second hinge  422 , the ground portion  431  may be electrically connected to all the second metal portion  4121 , the first metal portion  4111 , and the third metal portion  4131  when the closed path  4511  is selected in the first switch circuit  451 . As the length of the metal portion connected to the ground portion  431  changes, the length of the ground connected to the antenna structure  440  changes, such that the antenna structure  440  may change, for example, from a half-wavelength dipole antenna to a full-wavelength antenna. Accordingly, the controller  460  may control the first switch circuit  451  to change the length of the metal portion connected to the ground portion  431 , thereby changing a radiation pattern of a radiated signal. Meanwhile, the term “length of the ground” is for ease of description and is not limited to the two-dimensional length of the ground, and the length of the ground may be substantially construed as the size or range of the ground. Likewise, the term “length of the metal portion” is also for ease of description and is not limited to the two-dimensional length of the metal portion, and the length of the metal portion may be substantially construed as the size or range of the metal portion. 
     For example, referring to  FIG.  4 D , it may be learned that a radiation pattern when the first switch circuit  451  is connected through the closed path  4511  differs from a radiation pattern when the first switch circuit  451  is connected through the open path  4512 . Accordingly, it is possible to implement a variable radiation pattern through a variable ground by the control of the first switch circuit  451 , thereby improving adaptability in various use environments and improving communication quality. Meanwhile, although  FIG.  4 D  illustrates only simulation data about opening and closing the first switch circuit  451 , this is merely an example, and the radiation pattern may be changed by varying the impedance between the first metal portion  4111  and/or the second metal portion  4121  through the first switch circuit  451 . 
     In the description of the wearable electronic device  400  with reference to  FIGS.  4 A to  4 D , it is described and illustrated that the antenna structure  440  is positioned on the first leg  412 . However, this is merely an example, and the position of the antenna structure  440  is not limited thereto. For example, the antenna structure  440  may be positioned on the second leg  413  and/or the front  411 . For example, a case where the antenna structure  440  is positioned on the second leg  413  may be construed as an embodiment which is substantially symmetrical to the embodiment described with reference to  FIGS.  4 A to  4 D . For example, when the antenna structure  440  is positioned on the front  411 , the first metal portion  4111  may be connected to or disconnected from the second metal portion  4121  according to the control of the first switch circuit  451 , and the impedance between the first metal portion  4111  and the second metal portion  4121  may vary. 
       FIG.  4 E  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment.  FIG.  4 F  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit (e.g., the first switch circuit  451  of  FIG.  4 C ) and a second switch circuit (e.g., the second switch circuit  452  of  FIG.  4 E ) in an unfolded state of a wearable electronic device according to an embodiment. 
     Referring to  FIG.  4 E , the wearable electronic device  400  according to an embodiment may further include the second switch circuit  452 . 
     In one embodiment, the second switch circuit  452  may be positioned between the first metal portion  4111  of the front  411  and the third metal portion  4131  of the second leg  413 . For example, the second switch circuit  452  may be positioned between the second hinge  422  and the third metal portion  4131 . However, this is merely an example, and the second switch circuit  452  may be positioned between the second hinge  422  and the first metal portion  4111 . For example, the second switch circuit  452  may be connected to the second hinge  422  and/or the first metal portion  4111  through a connecting member (e.g., a C-Clip). 
     In one embodiment, the second switch circuit  452  may electrically connect or disconnect the first metal portion  4111  and the third metal portion  4131 , or change an impedance for connecting the first metal portion  4111  and the third metal portion  4131 . The second switch circuit  452  may include at least one path. For example, the second switch circuit  452  may include a closed path  4521 , an open path  4522 , and/or a lumped element path  4523 . The lumped element path  4523  may be formed of any one or a combination of a resistive element, a capacitive element, and an inductive element. A single or a plurality of lumped element paths  4523  may be formed. A plurality of lumped element paths  4523   a  and  4523   b  may be set to have different impedances. However, this is merely an example, and the paths of the second switch circuit  452  are not limited thereto. Further, although  FIG.  4 E  illustrates two lumped element paths  4523   a  and  4523   b , this is merely an example, and the number of lumped element paths  4523  is not limited thereto. 
     In one embodiment, the controller  460  may control the second switch circuit  452 . The controller  460  may select any one of the plurality of paths of the second switch circuit  452 . 
     In one embodiment, the controller  460  may control the first switch circuit  451  and/or the second switch circuit  452  to change the impedance and/or the length of the metal portion connected to the ground portion  431 . For example, when both the first switch circuit  451  and the second switch circuit  452  are open, the first metal portion  4111  may be electrically disconnected from each of the second metal portion  4121  and the third metal portion  4131 . In this case, the ground portion  431  may be electrically connected only to the second metal portion  4121 , and the first metal portion  4111  and the third metal portion  4131  may be electrically disconnected. For example, when the first switch circuit  451  is closed and the second switch circuit  452  is open, the first metal portion  4111  may be electrically connected to the second metal portion  4121  and electrically disconnected from the third metal portion  4131 . In this case, the ground portion  431  may be electrically connected to the second metal portion  4121  and the first metal portion  4111 . For example, when the first switch circuit  451  is open and the second switch circuit  452  is closed, the first metal portion  4111  may be electrically disconnected from the second metal portion  4121  and electrically connected to the third metal portion  4131 . In this case, the ground portion  431  may be electrically connected only to the second metal portion  4121 , and the first metal portion  4111  and the third metal portion  4131  may be electrically connected. For example, when both the first switch circuit  451  and the second switch circuit  452  are closed, the first metal portion  4111  may be electrically connected to both the second metal portion  4121  and the third metal portion  4131 . In this case, the ground portion  431  may be electrically connected to all the second metal portion  4121 , the first metal portion  4111 , and the third metal portion  4131 . For example, referring to  FIG.  4 F , it can be learned that a different radiation pattern is formed according to states of the first switch circuit  451  and the second switch circuit  452 . Accordingly, the controller  460  may control the first switch circuit  451  and/or the second switch circuit  452  to change the length of the metal portion connected to the ground portion  431 , thereby changing a radiation pattern of a radiated signal. When the first switch circuit  451  and the second switch circuit  452  are included, the length of the metal portion connected to the ground portion  431  may be changed more minutely, and thus, it is possible to implement various radiation patterns. Meanwhile, although  FIG.  4 F  illustrates only simulation data about opening and closing the first switch circuit  451  and the second switch circuit  452 , this is merely an example, and the radiation pattern may be changed by varying the impedance between the first metal portion  4111  and/or the second metal portion  4121  and/or the impedance between the first metal portion  4111  and the third metal portion  4131  through the first switch circuit  451  and the second switch circuit  452 . 
       FIG.  4 G  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit, a second switch circuit, a third switch circuit, and a fourth switch circuit in an unfolded state of a wearable electronic device according to an embodiment. 
     Referring to  FIGS.  4 B and  4 G , the wearable electronic device  400  according to an embodiment may further include the third switch circuit  453  and/or the fourth switch circuit  454 . 
     In one embodiment, the third switch circuit  453  and the fourth switch circuit  454  may connect the radiating element  441  and the ground portion  431  at positions adjacent to the feeder  442 . For example, the third switch circuit  453  and the fourth switch circuit  454  may be positioned on both sides of the feeder  442 , such that the feeder  442  may be positioned between the third switch circuit  453  and the fourth switch circuit  454 . As another example, if both the third switch circuit  453  and the fourth switch circuit  454  can be positioned on one side of the feeder  442 , other embodiments may be possible. For example, the third switch circuit  453  and/or the fourth switch circuit  454  may be connected to the radiating element  441  and/or the ground portion  431  through a connecting member (e.g., a C-Clip). 
     In one embodiment, the third switch circuit  453  and the fourth switch circuit  454  may each electrically connect or disconnect the radiating element  441  and the ground portion  431 , or change an impedance for connecting the radiating element  441  and the ground portion  431 . The third switch circuit  453  and the fourth switch circuit  454  may each include at least one path. For example, the third switch circuit  453  may include a closed path  4531 , an open path  4532 , and/or a lumped element path  4533 . The lumped element path  4533  may be formed of any one or a combination of a resistive element, a capacitive element, and an inductive element. A single or a plurality of lumped element paths  4533  may be formed. A plurality of lumped element paths  4533   a  and  4533   b  may be set to have different impedances. For example, the fourth switch circuit  454  may include a closed path  4541 , an open path  4542 , and/or a lumped element path  4543 . The lumped element path  4543  may be formed of any one or a combination of a resistive element, a capacitive element, and an inductive element. A single or a plurality of lumped element paths  4543  may be formed. A plurality of lumped element paths  4543   a  and  4543   b  may be set to have different impedances. However, this is merely an example, and the paths of the third switch circuit  453  and/or the fourth switch circuit  454  are not limited thereto. Further, although  FIG.  4 B  illustrates two lumped element paths  4533   a  and  4533   b ,  4543   a  and  4543   b , this is merely an example, and the number of lumped element paths  4533 ,  4543  is not limited thereto. 
     In one embodiment, the controller (e.g., the controller  460  of  FIG.  4 C ) may control the third switch circuit  453  and/or the fourth switch circuit  454 . The controller  460  may select any one of the plurality of paths of the third switch circuit  453  and/or the fourth switch circuit  454 . For example, the controller  460  may control the third switch circuit  453  and/or the fourth switch circuit  454  to adjust a band of a signal radiated from the radiating element  441  and/or a radiation pattern of the radiated signal. For example, the controller  460  may open the third switch circuit  453  and close the fourth switch circuit  454 , or close the third switch circuit  453  and open the fourth switch circuit  454 . However, this is merely an example, and the connection state of the third switch circuit  453  and/or the fourth switch circuit  454  is not limited thereto. 
     In one embodiment, the controller  460  may control at least one of the first switch circuit  451 , the second switch circuit  452 , the third switch circuit  453 , or the fourth switch circuit  454  to adjust the pattern of the radiated signal. For example, as shown in  FIG.  4 G , by changing the states of the first switch circuit  451 , the second switch circuit  452 , the third switch circuit  453 , and the fourth switch circuit  454 , it is possible to change the radiation pattern of the radiated signal. The combination of the states of the first switch circuit  451 , the second switch circuit  452 , the third switch circuit  453 , and the fourth switch circuit  454  shown in  FIG.  4 G  is merely an example, and embodiments are not limited thereto and may include all possible combinations. 
       FIG.  4 H  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit and a second switch circuit in a folded state of a wearable electronic device according to an embodiment. 
     Referring to  FIG.  4 H , even when a wearable electronic device (e.g., the wearable electronic device  400  of  FIG.  4 A ) is folded, a first switch circuit (e.g., the first switch circuit  451  of  FIG.  4 E ), a second switch circuit (e.g., the second switch circuit  452  of  FIG.  4 E ), a third switch circuit (e.g., the third switch circuit  453  of  FIG.  4 B ), and/or a fourth switch circuit (e.g., the fourth switch circuit  454  of  FIG.  4 B ) may operate. For example, even when the wearable electronic device  400  is folded, a radiation pattern of a radiated signal may be changed through the control of the first switch circuit  451  and the second switch circuit  452 . However,  FIG.  4 H  is merely an example, and even when the wearable electronic device  400  is folded, the radiation pattern of the radiated signal may be changed through various combinations of the states of the first switch circuit  451 , the second switch circuit  452 , the third switch circuit  453 , and/or the fourth switch circuit  454 . 
       FIG.  5 A  is a perspective view schematically illustrating a wearable electronic device according to an embodiment.  FIG.  5 B  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment.  FIG.  5 C  is simulation data illustrating radiation patterns of a signal radiated according to states of a first switch circuit and a second switch circuit in an unfolded state of a wearable electronic device according to an embodiment. 
     Referring to  FIGS.  5 A and  5 B , a wearable electronic device  500  (e.g., the wearable electronic device  200  of  FIG.  2   ) according to an embodiment may include a frame  510  (e.g., the frame  410  of  FIG.  4 A ), lenses  514  (e.g., the lenses  414  of  FIG.  4 A ), a first hinge  521  (e.g., the first hinge  421  of  FIG.  4 A ), a second hinge  522  (e.g., the second hinge  422  of  FIG.  4 A ), a PCB  530  (e.g., the PCB  430  of  FIG.  4 B ), an antenna structure  540  (e.g., the antenna structure  440  of  FIG.  4 A ), a first switch circuit  551  (e.g., the first switch circuit  451  of  FIG.  4 C ), a second switch circuit  552  (e.g., the second switch circuit  452  of  FIG.  4 C ), and/or a controller  560  (e.g., the controller  460  of  FIG.  4 C ). 
     In one embodiment, the PCB  530  and the antenna structure  540  may be positioned inside a front  511  (e.g., the front  411  of  FIG.  4 A ) of the frame  510 . For example, the PCB  530  and the antenna structure  540  may be positioned on one side (e.g., a side in a +y direction) of the front  511 . For example, the PCB  530  and the antenna structure  540  may be positioned closer to a first leg  512  (e.g., the first leg  412  of  FIG.  4 A ) than to a second leg  513  (e.g., the second leg  413  of  FIG.  4 A ). However, this is merely an example, and the positions of the PCB  530  and the antenna structure  540  are not limited thereto. 
     In one embodiment, the first switch circuit  551  may be positioned between a first metal portion  5111  (e.g., the first metal portion  4111  of  FIG.  4 C ) of the front  511  and a second metal portion  5121  (e.g., the second metal portion  4121  of  FIG.  4 C ) of the first leg  512 . For example, the first switch circuit  551  may be positioned between the first hinge  521  and the second metal portion  5121 . 
     In one embodiment, the second switch circuit  552  may be positioned between the first metal portion  5111  (e.g., the first metal portion  4111  of  FIG.  4 C ) of the front  511  and a third metal portion  5131  (e.g., the third metal portion  4131  of  FIG.  4 C ) of the second leg  513 . For example, the second switch circuit  552  may be positioned between the second hinge  522  and the third metal portion  5131 . 
     In one embodiment, the controller  560  may control the first switch circuit  551  and/or the second switch circuit  552  to change the impedance and/or the length of the metal portion connected to a ground portion  531  (e.g., the ground portion  431  of  FIG.  4 C ). For example, when both the first switch circuit  551  and the second switch circuit  552  are open, the ground portion  531  may be electrically connected only to the first metal portion  5111  and electrically disconnected from the second metal portion  5121  and the third metal portion  5131 . For example, when the first switch circuit  551  is closed and the second switch circuit  552  is open, the ground portion  531  may be electrically connected to the first metal portion  5111  and the second metal portion  5121  and electrically disconnected from the third metal portion  5131 . For example, when the first switch circuit  551  is open and the second switch circuit  552  is closed, the ground portion  531  may be electrically connected to the first metal portion  5111  and the third metal portion  5131  and electrically disconnected from the second metal portion  5121 . For example, when both the first switch circuit  551  and the second switch circuit  552  are closed, the ground portion  531  may be electrically connected to all the first metal portion  5111 , the second metal portion  5121 , and the third metal portion  5131 . 
     In one embodiment, referring to  FIG.  5 C , it can be learned that a different radiation pattern is formed according to states of the first switch circuit  551  and the second switch circuit  552 . Accordingly, the controller  560  may control the first switch circuit  551  and/or the second switch circuit  552  to change the length of the metal portion connected to the ground portion  531 , thereby changing a radiation pattern of a radiated signal. As shown in  FIGS.  5 A and  5 B , when the PCB  530  and the antenna structure  540  are positioned on the front  511 , the length of the metal portion connected to the ground portion  531  may be changed in various ways using the first switch circuit  551  and the second switch circuit  552 , and thus, it is possible to implement various radiation patterns. For example, when the PCB  530  and the antenna structure  540  are positioned closer to the first leg  512  than to the second leg  513 , different radiation patterns may be generated in a state in which the first switch circuit  551  is open and the second switch circuit  552  is closed and in a state in which the second switch circuit  552  is open and the first switch circuit  551  is closed. Meanwhile, although  FIG.  5 C  illustrates only simulation data about opening and closing the first switch circuit  551  and the second switch circuit  552 , this is merely an example, and the radiation pattern may be changed by varying the impedance between the first metal portion  5111  and/or the second metal portion  5121  and/or the impedance between the first metal portion  5111  and the third metal portion  5131  through the first switch circuit  551  and the second switch circuit  552 . 
       FIG.  5 D  is a block diagram illustrating a connection relationship between components of a wearable electronic device according to an embodiment. 
     Referring to  FIG.  5 D , in one embodiment, the first switch  551  may be positioned between the first hinge  521  and the first metal portion  5111 . The second switch  552  may be positioned between the second hinge  522  and the first metal portion  5111 . Even with this positional relationship, the operation may substantially the same or similar to the description provided with reference to  FIGS.  5 A to  5 C . 
       FIG.  5 E  is a plan view schematically illustrating a wearable electronic device according to an embodiment.  FIG.  5 F  is a block diagram schematically illustrating a connection relationship between components of a wearable electronic device according to an embodiment. 
     Referring to  FIGS.  5 E and  5 F , in one embodiment, the first metal portion  5111  may include a fourth metal portion  5111   a  and a fifth metal portion  5111   b . The fourth metal portion  5111   a  may be electrically connected to the second metal portion  5121  through the first hinge  521 . The fifth metal portion  5111   b  may be electrically connected to the third metal portion  5131  through the second hinge  522 . When the PCB  530  and the antenna structure  540  are positioned closer to the first leg  512  than to the second leg  513 , the fourth metal portion  5111   a  may be substantially formed to be shorter than the fifth metal portion  5111   b.    
     In one embodiment, the first switch circuit  551  may connect the fourth metal portion  5111   a  and the ground portion  531  of the antenna structure  540 . The second switch  552  may connect the fifth metal portion  5111   b  to the ground portion  531  of the antenna structure  540 . 
     In one embodiment, the controller  560  may control the first switch circuit  551  and/or the second switch circuit  552  to change the impedance and/or the length of the metal portion connected to the ground portion  531 . As described herein, the length of the metal portion may refer to a total amount of metal that is connected to the ground portion  531  based on a total number of the metal portions described herein that are connected to the ground portion  531 . For example, when both the first switch circuit  551  and the second switch circuit  552  are open, the ground portion  531  may be electrically disconnected from all the fourth metal portion  5111   a , the fifth metal portion  5111   b , the second metal portion  5121 , and the third metal portion  5131 . For example, when the first switch circuit  551  is closed and the second switch circuit  552  is open, the ground portion  531  may be electrically connected to the fourth metal portion  5111   a  and the second metal portion  5121  and electrically disconnected from the fifth metal portion  5111   b  and the third metal portion  5131 . For example, when the first switch circuit  551  is open and the second switch circuit  552  is closed, the ground portion  531  may be electrically connected to the fifth metal portion  5111   b  and the third metal portion  5131  and electrically disconnected from the fourth metal portion  5111   a  and the second metal portion  5121 . For example, when both the first switch circuit  551  and the second switch circuit  552  are closed, the ground portion  531  may be electrically connected to all the fourth metal portion  5111   a , the fifth metal portion  5111   b , the second metal portion  5121 , and the third metal portion  5131 . As shown in  FIG.  5 E , when the fourth metal portion  5111   a  and the fifth metal portion  5111   b  are different in length, the length of the metal portion connected to the ground portion  531  may be changed in various ways using the first switch circuit  551  and the second switch circuit  552 , and thus, it is possible to implement various radiation patterns. 
     In various embodiments, a wearable electronic device  400  may include: a frame including a front, a first leg, a second leg, and at least one metal portion; the front  411  with a lens  414  connected thereto, and including a first metal portion  4111  among the at least one metal portion; the first leg  412  connected to one end of the front  411  through a first hinge  421 , and including a second metal portion  4121  among the at least one metal portion; the second leg  413  connected to an other end of the front  411  through a second hinge  422 ; a PCB  430  including a ground portion  431  electrically connected to the first metal portion  4111  or the second metal portion  4121 ; an antenna structure  440  including a radiating element  441  and a feeder  442  electrically connected to the radiating element  441 ; a first switch circuit  451  configured to electrically connect or disconnect the first metal portion  4111  and the second metal portion  4121  or to change an impedance for connecting the first metal portion  4111  and the second metal portion  4121 ; and a controller  460  configured to control the first switch circuit  451 . 
     In various embodiments, the controller  460  may be configured to control the first switch circuit  451  to change a length of the at least one metal portion connected to the ground portion  431 . 
     In various embodiments, the PCB  430  may be positioned inside the first leg  412 , and the ground portion  431  may be electrically connected to the second metal portion  4121 . 
     In various embodiments, the first metal portion  4111  and the second metal portion  4121  may be connected through the first hinge  421 . 
     In various embodiments, the first switch circuit  451  may be positioned between the second metal portion  4121  and the first hinge  421 . 
     In various embodiments, the second leg  413  may include a third metal portion  4131 , and the wearable electronic device  400  may further include: a second switch circuit  452  configured to electrically connect or disconnect the first metal portion  4111  and the third metal portion  4131  or to change the impedance for connecting the first metal portion  4111  and the third metal portion  4131 . 
     In various embodiments, the first metal portion  4111  and the third metal portion  4131  may be connected through the second hinge  422 . 
     In various embodiments, the second switch circuit  452  may be positioned between the third metal portion  4131  and the second hinge  422 . 
     In various embodiments, the controller  460  may be configured to control at least one of the first switch circuit  451  or the second switch circuit  452  to change a length of the at least one metal portion connected to the ground portion  431 . 
     In various embodiments, the wearable electronic device  400  may further include: a third switch circuit  453  and a fourth switch circuit  454  connecting the radiating element  441  and the ground portion  431  at positions adjacent to the feeder  442 . 
     In various embodiments, the feeder  442  may be positioned between the third switch circuit  453  and the fourth switch circuit  454 . 
     In various embodiments, the third switch circuit  453  and the fourth switch circuit  454  may each be configured to electrically connect or disconnect the radiating element  441  and the ground portion  431  or to change an impedance for connecting the radiating element  441  and the ground portion  431 . 
     In various embodiments, the controller  460  may be configured to control at least one of the third switch circuit  453  or the fourth switch circuit  454  to adjust at least one of a radiation pattern or a band of a radiated signal. 
     In various embodiments, the PCB  530  may be positioned inside the front  511 , and the ground portion  531  may be electrically connected to the first metal portion  5111 . 
     In various embodiments, the first switch circuit  451  may be operable in each of an unfolded state and a folded state of the first leg  412  and the second leg  413 . 
     In various embodiments, a wearable electronic device  400  may include: a frame including a front, a first leg, a second leg, and at least one metal portion; the front  411  with a lens  414  connected thereto, and including a first metal portion  4111  among the at least one metal portion; the first leg  412  connected to one end of the front  411  through a first hinge  421 , and including a second metal portion  4121  among the at least one metal portion; the second leg  413  connected to an other end of the front  411  through a second hinge  422 ; a PCB  430  including a ground portion  431  electrically connected to the first metal portion  4111 , the PCB  430  positioned inside the first leg  412 ; an antenna structure  440  including a radiating element  441  and a feeder  442  electrically connected to the radiating element  441 ; a first switch circuit  451  configured to electrically connect or disconnect the first metal portion  4111  and the second metal portion  4121 ; and a controller  460  configured to control the first switch circuit  451 . 
     In various embodiments, the controller  460  may be configured to control the first switch circuit  451  to change a length of the at least one metal portion connected to the ground portion  431 . 
     In various embodiments, the first metal portion  4111  and the second metal portion  4121  may be connected through the first hinge  421 . 
     In various embodiments, the first switch circuit  451  may be positioned between the second metal portion  4121  and the first hinge  421 . 
     In various embodiments, the second leg  413  may include a third metal portion  4131  among the at least one metal portion, the wearable electronic device may further include: a second switch circuit  452  configured to electrically connect or disconnect the first metal portion  4111  and the third metal portion  4131 , and the controller  460  may be configured to control at least one of the first switch circuit  451  or the second switch circuit  452  to change a length of the at least one metal portion connected to the ground portion  431 .