Patent Publication Number: US-2023161388-A1

Title: Electronic device including bracket formed of metal material

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation application, claiming priority under § 365(c), of an International application No. PCT/KR2022/012344, filed on Aug. 18, 2022, which is based on and claims the benefit of a Korean patent application number 10-2021-0164954, filed on Nov. 25, 2021, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
    
    
     TECHNICAL FIELD 
     The disclosure relates to an electronic device including a bracket formed of a metal material. More particularly, the disclosure relates to an electronic device including brackets formed of different metal materials according to structural characteristics of the electronic device. 
     BACKGROUND ART 
     Due to the remarkable development of information communication technology, semiconductor technology, and the like, the distribution and use of various electronic devices are rapidly increasing. More particularly, recent electronic devices are being developed such that users are capable of communicating with each other while carrying the electronic devices. 
     Typically, an electronic device may mean a device that performs a specific function according to a program provided therein (e.g., an electronic scheduler, a portable multimedia reproducer, a mobile communication terminal, a tablet PC, an image/sound device, a desktop/laptop PC, or a vehicle navigation system), as well as a home appliance. The above-mentioned electronic devices may output, for example, information stored therein as sound or an image. As the degree of integration of electronic devices has increased and ultra-high-speed and large-capacity wireless communication has become popular, multiple functions have recently come to be provided in a single electronic device, such as a mobile communication terminal. For example, various functions, such as an entertainment function (e.g., a game function), a multimedia function (e.g., a music/video reproducing function), a communication and security function (e.g., mobile banking), a schedule management function, and an e-wallet function, are integrated in a single electronic device, in addition to a communication function. Such an electronic device is being miniaturized so that a user can conveniently carry the electronic device. 
     Recently, a portable electronic device, such as a smartphone may include housing structures having different structures based on a hinge structure, including a flexible display. Accordingly, measures for satisfying conditions required according to the structural characteristics of each housing structure of the electronic device may be considered. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     DETAILED DESCRIPTION OF THE INVENTION 
     Technical Problem 
     An electronic device including a flexible display may include housing structures having different structures based on a hinge structure. For example, one housing structure includes a printed circuit board on which a plurality of heating elements are stacked, so the thermal conductivity of a metal material constituting a bracket that supports the printed circuit board may be important, and the other housing structure includes a sub-display, so the specific gravity of a metal material constituting a bracket that supports the sub-display may be important. 
     Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide an electronic device including brackets formed of different metal materials according to structural characteristics of the electronic device. 
     Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments. 
     Technical Solution 
     In accordance with an aspect of the disclosure, an electronic device is provided. The electronic device includes a foldable housing including a hinge structure, a first housing connected to the hinge structure and including a first side wall structure and a first bracket located inside the first side wall structure, and a second housing connected to the hinge structure and including a second side wall structure and a second bracket located inside the second side wall structure, the second housing being folded with the first housing about the hinge structure, a display panel extending from the first housing to the second housing across the hinge structure and configured to output a screen, and a second antenna structure including a second ground and a second feeding portion disposed on the second side wall structure of the second housing, wherein the first side wall structure of the first housing and the second side wall structure of the second housing may include a first metal material, and the first bracket of the first housing includes the first metal material, and the second bracket of the second housing may include a second metal material. 
     Advantageous Effects 
     In an electronic device according to various embodiments of the disclosure, based on the hinge structure, the side wall structure and the bracket included in the housing structure in which a heat source is mounted are formed of the same metal material having high thermal conductivity, and the side wall structure and the bracket included in the housing structure in which a heat source is not mounted are at least partially formed of a metal material having a low specific gravity. Thus, it is possible to reduce the weight of the electronic device. 
     In the electronic device according to various embodiments of the disclosure, it is possible to transfer heat generated by an electronic component to the outside of a hinge module or the electronic device. 
     In addition, various effects directly or indirectly understood through this document can be provided. 
     Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a block diagram illustrating an electronic device in a network environment according to an embodiment of the disclosure; 
         FIG.  2    is a view illustrating an electronic device in an unfolded state according to an embodiment of the disclosure; 
         FIG.  3    is a view illustrating an electronic device of  FIG.  2    in a folded state according to an embodiment of the disclosure; 
         FIG.  4    is an exploded perspective view of an electronic device according to an embodiment of the disclosure; 
         FIG.  5    is a projection view illustrating an internal structure of an electronic device in an unfolded state according to an embodiment of the disclosure; 
         FIG.  6    is a view illustrating an antenna structure of an electronic device of  FIG.  5    in a folded state according to an embodiment of the disclosure; 
         FIG.  7    is a cross-sectional view of an electronic device of  FIG.  5   , taken in a direction A-A′ in  FIG.  5    according to an embodiment of the disclosure; 
         FIG.  8    is a view illustrating an embodiment in which a second housing structure of an electronic device of  FIG.  5    is formed of different metal materials according to an embodiment of the disclosure; 
         FIGS.  9 A and  9 B  are views each illustrating a ground portion of a first antenna in a first housing structure of an electronic device of  FIG.  8    according to an embodiment of the disclosure; 
         FIGS.  10 A and  10 B  are views each illustrating a ground portion of a second antenna in a second housing structure of an electronic device of  FIG.  8    according to an embodiment of the disclosure; 
         FIG.  11    is an enlarged view of a region A of a first side wall structure of an electronic device of  FIG.  8    according to an embodiment of the disclosure; 
         FIG.  12    is an enlarged view of a region B of a second side wall structure of an electronic device of  FIG.  8    according to an embodiment of the disclosure; 
         FIG.  13    is a cross-sectional view of an electronic device of  FIG.  11   , taken in a B-B′ direction according to an embodiment of the disclosure; 
         FIG.  14    is a cross-sectional view of an electronic device of  FIG.  12   , taken in a C-C′ direction according to an embodiment of the disclosure; 
         FIG.  15    is a cross-sectional view of an electronic device of  FIG.  12   , taken in a D-D′ direction according to an embodiment of the disclosure; 
         FIG.  16    is a view illustrating an embodiment in which a second housing structure of an electronic device of  FIG.  5    is formed of a same metal material according to an embodiment of the disclosure; and 
         FIG.  17    is a cross-sectional view of an electronic device of  FIG.  16   , taken in an E-E′ direction according to an embodiment of the disclosure. 
     
    
    
     Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
     MODE FOR CARRYING OUT THE INVENTION 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
       FIG.  1    is a block diagram illustrating an electronic device in a network environment according to an embodiment of the disclosure. 
     Referring to  FIG.  1   , an electronic device  101  in a network environment  100  may communicate with an external electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or an external electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment of the disclosure, the electronic device  101  may communicate with the external electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , 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 of the components (e.g., the connecting terminal  178 ) 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 of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be implemented 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  coupled with the processor  120 , and may perform various data processing or computation. According to one embodiment, as at least part of the 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 from, 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 as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control, for example, at least some of functions or states related to at least one component (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., a sleep) state, or together with the main processor  121  while the main processor  121  is in an active (e.g., executing an application) state. According to an embodiment, the auxiliary processor  123  (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . According to an embodiment, the auxiliary processor  123  (e.g., the neural processing unit) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed, e.g., by the electronic device  101  where the artificial intelligence is performed or via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, e.g., supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), 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 program  140  may be stored in the memory  130  as software, 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 sound signals 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 for receiving incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part 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 display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and 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., the external electronic device  102  (e.g., a speaker or a headphone)) directly or wirelessly coupled with 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 then 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 external electronic device  102 ) directly or wirelessly. According to an embodiment of the disclosure, 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. 
     A connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the external 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 electrical stimulus which may be recognized by a user via his 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 or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to one embodiment, the power management module  188  may be implemented as at least part of, for example, 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 external electronic device  102 , the external 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 from the processor  120  (e.g., the application processor (AP)) and supports 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 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., LAN or 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 or 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 subscriber identification module  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., the 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), array antenna, analog beam-forming, or 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 external 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 may include an antenna including a radiating element composed of 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 the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one 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 part of the antenna module  197 . 
     The antenna module  197  may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a designated high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., the top or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals of 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 a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more external devices of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should 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 the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and 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 part 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 another embodiment, the external electronic device  104  may include an internet-of-things (IoT) device. The server  108  may be an intelligent server using machine learning and/or 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., a smart home, a smart city, a smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
     The electronic device according to various embodiments of the disclosure may be one of various types of electronic devices. The electronic devices may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. According to an embodiment of the disclosure, the electronic devices are not limited to those described above. 
     It should be appreciated that various embodiments of the 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. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. 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, each of such phrases as “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B, or C”, “at least one of A, B, and C”, and “at least one of A, B, or C”, may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “1st” and “2nd”, or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (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 complier or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Wherein, 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 part 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 of the disclosure, 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 of the disclosure, one or more of the above-described components or operations may be omitted, or one or more other components or operations 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, 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 of the disclosure, 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. 
       FIG.  2    is a view illustrating an electronic device in an unfolded state according to an embodiment of the disclosure.  FIG.  3    is a view illustrating an electronic device of  FIG.  2    in a folded state according to an embodiment of the disclosure. 
     In the following detailed description, a pair of housing structures (or referred to as “housings”) may be exemplified with respect to a configuration in which the housing structures are rotatably coupled to each other by a hinge structure (or, referred to as a “hinge module”). However, it should be noted that these embodiments do not limit an electronic device according to various embodiments of the disclosure. For example, an electronic device according to various embodiments of the disclosure may include three or more housing structures, and “a pair of housing structures” in the embodiments disclosed below means “two housing structures rotatably coupled to each other among three or more housing structures”. 
     Referring to  FIGS.  2  and  3   , an electronic device  101  (e.g., the electronic device  101  in  FIG.  1   ) may include a pair of housing structures  210  and  220  rotatably coupled to each other via a hinge structure (e.g., a hinge structure  264  in  FIG.  4   ) so as to be folded with respect to each other, a hinge cover  265  that covers the foldable portions of the pair of housing structures  210  and  220 , and a display  230  (e.g., a flexible display or a foldable display) disposed in a space defined by the pair of housing structures  210  and  220 . According to an embodiment, the electronic device  101  may include a foldable housing in which the pair of housing structures  210  and  220  are coupled to be rotatable from a position at which the pair of housing structures  110  and  120  are folded to face each other to a position at which the pair of housing structures  210  and  220  are unfolded to be parallel to each other. The surface on which the display  230  according to various embodiments of the disclosure is may be defined as the front surface of the electronic device  101 , and the surface opposite to the front surface may be defined as the rear surface of the electronic device  101 . In addition, the surface surrounding the space between the front surface and the rear surface may be defined as the side surface of the electronic device  101 . 
     According to an embodiment, the pair of housing structures  210  and  220  may include a first housing structure  210  including a sensor region  231   d , a second housing structure  220 , a first rear cover  240 , and a second rear cover  250 . The pair of housing structures  210  and  220  of the electronic device  101  are not limited to the shape and assembly illustrated in  FIGS.  2  and  3   , but may be implemented by other combinations and/or assemblies of other shapes or components. For example, according to another embodiment, the first housing structure  210  and the first rear cover  240  may be integrally configured, and the second housing structure  220  and the second rear cover  250  may be integrally configured. In another embodiment, the first housing structure  210  may include a first rear cover  240 , and the second housing structure  220  may include a second rear cover  250 . 
     According to an embodiment, the first housing structure  210  and the second housing structure  220  may be disposed on opposite sides about a folding axis A, and may have generally symmetrical shapes with respect to the folding axis A. According to some embodiments, the first housing structure  210  and the second housing structure  220  are rotatable with respect the hinge structure  264  or the hinge cover  265  about different folding axes. For example, the first housing structure  210  and the second housing structure  220  may be coupled to the hinge structure  264  or the hinge cover  265  to be individually rotatable. Since the first housing structure  210  and the second housing structure  220  rotate about the folding axis A or about different folding axes, respectively, the first housing structure and the second housing structure are rotatable between the positions at which the first housing structure and the second housing structure are folded to each other and the positions at which the first housing structure and the second housing structure are inclined with respect to each other or the positions at which the first housing structure and the second housing structure are unfolded to be parallel to each other. 
     In the disclosure, the wording “positioned side by side” or “extending side by side” may mean the state in which two structures (e.g., the housing structures  210  and  220 ) are at least partially positioned next to each other or the state in which at least portions positioned next to each other are arranged parallel to each other. According to some embodiments, the wording “arranged side by side” may mean that the two structures are arranged to look in parallel or in the same direction while being located next to each other. Expressions such as “side by side”, “parallel”, and the like may be used in the following detailed description, which will be readily understood according to the shapes or arrangements of the structures with reference to the accompanying drawings. 
     According to an embodiment, the angle or distance between the first housing structure  210  and the second housing structure  220  may vary depending on whether the electronic device  101  is in the unfolded state (an extended state, a flat state or an open state), in the folded state (or a closed), or in the intermediate state. In describing various embodiments of the disclosure, when the state of the electronic device  101  is the “unfolded state”, it may mean that the electronic device  101  is in a “fully unfolded state” in which the first housing structure  210  and the second housing structure  220  of the electronic device  101  form 180 degrees therebetween. When the state of the electronic device  101  is the “closed state”, it may mean that the electronic device  101  is in the state in which the first housing structure  210  and the second housing structure  220  of the electronic device  101  form an angle of 0 degrees or less than 10 degrees therebetween. When the state of the electronic device  101  is the “intermediate state”, it means that the angle between the first housing structure  210  and the second housing structure  220  forms an angle between the angle formed in the “unfolded state” and the angle formed in the “closed state”. 
     According to an embodiment, unlike the second housing structure  220 , the first housing structure  210  may further include the sensor region  324  in which various sensors are disposed. However, the first housing structure  210  and the second housing structure  220  may have mutually symmetrical shapes in other regions. According to another embodiment, the sensor region  231   d  may be additionally disposed or replaced in at least a partial region of the second housing structure  220 . According to another embodiment, the sensor region  231   d  may be omitted from the first housing structure  210 . 
     According to an embodiment, in the unfolded state of the electronic device  101 , the first housing structure  210  may include a first surface  211  connected to a hinge structure (e.g., the hinge structure  264  in  FIG.  4   ) and arranged to face the front side of the electronic device  101 , a second surface  212  facing away from the first surface  211 , and a first side wall structure  213  surrounding at least a portion of the space between the first surface  211  and the second surface  212 . According to an embodiment, the first side wall structure  213  may include a first side wall  213   a  arranged in parallel to the folding axis A, a second side wall  213   b  extending from one end of the first side wall  213   a  in a direction perpendicular to the folding axis A, and a third side wall  213   c  extending from the other end of the first side wall  213   a  in a direction perpendicular to the folding axis A. In describing various embodiments, expressions such as “parallel” or “perpendicular” are used in connection with the arrangements of the above-described side faces, but in some embodiments, the expressions may include the meaning of “partially parallel” or “partially perpendicular”. In some embodiments, expressions such as “parallel” or “perpendicular” may include an inclined arrangement relationship in an angular range within 10 degrees. 
     According to an embodiment, in the unfolded state of the electronic device  101 , the second housing structure  220  may include a third surface  221  connected to the hinge structure (e.g., the hinge structure  260  in  FIG.  4   ) and arranged to face the front side of the electronic device  101 , a fourth surface  222  facing away from the third surface  221 , and a second side wall structure  223  surrounding at least a portion of the space between the third surface  221  and the fourth surface  222 . According to an embodiment, the second side wall structure  223  may include a fourth side wall  223   a  arranged in parallel to the folding axis A, a fifth side wall  223   b  extending from one end of the fourth side wall  223   a  in a direction perpendicular to the folding axis A, and a sixth side wall  223   c  extending from the other end of the fourth side wall  223   a  in a direction perpendicular to the folding axis A. According to an embodiment, in the folded state, the third surface  221  may be disposed to face the first surface  211 . According to some embodiments, although there are some differences in specific shape, the second side wall structure  223  may be manufactured in substantially the same shape or made of substantially the same material as the first side wall structure  213 . 
     According to an embodiment, the electronic device  101  may include a recess  201  defined to accommodate the display  230  through structural shape coupling between the first housing structure  210  and the second housing structure  220 . The recess  201  may have substantially the same size as the display  230 . 
     According to an embodiment, at least a portion of the first housing structure  210  and at least a portion of the second housing structure  220  may be formed of a metal material or a non-metal material having rigidity, the level of which is selected in order to support the display  230 . According to another embodiment, the first housing structure  210  and the second housing structure  220  may at least partially include a conductive material. When the first housing structure  210  and the second housing structure  220  include a conductive material, the electronic device  101  may transmit/receive radio waves by using the portions formed of the conductive material in the first housing structure  210  and the second housing structure  220 . For example, a processor or a communication module of the electronic device  101  may perform wireless communication using a portion of each of the first housing structure  210  and the second housing structure  220 . 
     According to an embodiment, the sensor region  231   d  may be disposed in the display  230  to have a predetermined region without a separate notch adjacent to one corner of the first housing structure  210 . However, the arrangement, shape, and size of the sensor region  231   d  is not limited to the illustrated example. For example, in another embodiment, the sensor region  231   d  may be provided at another corner of the first housing structure  210  or in any region between the upper and lower end corners. According to another embodiment, the sensor region  231   d  may be disposed in at least a partial region of the second housing structure  220 . According to another embodiment, the sensor region  231   d  may be disposed to extend over the first housing structure  210  and the second housing structure  220 . According to an embodiment, the electronic device  101  may include components exposed to the front surface of the electronic device  101  through the display  230  or through one or more openings provided in the display  230 , and may perform various functions by using these components. For example, a front camera device disposed in the sensor region  231   d  may be exposed on the front surface of the electronic device  101  through the one or more openings provided in the display  230 . However, the disclosure is not necessarily limited to this embodiment, and at least one of the other components disposed in the sensor region  231   d , for example, a proximity sensor, an illuminance sensor, an iris recognition sensor, an ultrasonic sensor, or an indicator, may be exposed on the front surface of the electronic device  101 . The sensor region  231   d  may be omitted according to an embodiment, and according to this, the components disposed in the sensor region  231   d  may be distributed and disposed in at least a portion of the first housing structure  210  and/or at least a portion of the second housing structure  220 . 
     According to an embodiment, the first rear cover  240  may be disposed on the second face  212  of the first housing structure  210 , and may have a substantially rectangular periphery. According to an embodiment, the periphery of the first rear cover  240  may be at least partially wrapped by the first housing structure  210 . Similarly, the second rear cover  250  may be disposed on the fourth surface  222  of the second housing structure  220 , and at least a portion of the periphery of the second rear cover  250  may be at least partially enclosed by the second housing structure  220 . 
     According to the illustrated embodiment, the first rear cover  240  and the second rear cover  250  may have substantially symmetrical shapes with respect to the folding axis A. According to another embodiment, the first rear cover  240  and the second rear cover  250  may have various different shapes. According to a still another embodiment, the first rear cover  240  may be formed integrally with the first housing structure  210 , and the second rear cover  250  may be formed integrally with the second housing structure  220 . 
     According to an embodiment, the first rear cover  240 , the second rear cover  250 , the first housing structure  210 , and the second housing structure  220  may provide, through a mutually coupled structure, a space in which various components (e.g., a printed circuit board, an antenna module, a sensor module, or a battery) of the electronic device  101  may be disposed. According to an embodiment, one or more components may be disposed or visually exposed on the rear surface of the electronic device  101 . For example, one or more components or sensors may be visually exposed through a first rear region  241  of the first rear cover  240 . According to various embodiments, the sensors may include a proximity sensor, a rear camera device, and/or a flash. In an embodiment, at least a portion of the sub-display  252  may be visually exposed through a second rear region  251  of the second rear cover  250 . For example, the sub-display  252  may include the entire second rear region  251  of the second rear cover  250 . 
     The display  230  may be disposed in a space defined by the pair of housing structures  210  and  220 . For example, the display  230  may be seated in the recess (e.g., the recess  201  in  FIG.  2   ) defined by the pair of housing structures  210  and  220 , and may be disposed to occupy substantially the majority of the front surface of the electronic device  101 . For example, the front surface of the electronic device  101  may include the display  230 , and a partial region (e.g., a peripheral region) of the first housing structure  210  and a partial region (e.g., a peripheral region) of the second housing structure  220 , which are adjacent to the display  230 . According to an embodiment, the rear surface of the electronic device  101  may include a first rear cover  240 , a partial region (e.g., a peripheral region) of the first housing structure  210  adjacent to the first rear cover  240 , a second rear cover  250 , and a partial region (e.g., a peripheral region) of the second housing structure  220  adjacent to the second rear cover  250 . 
     According to an embodiment, the display  230  may refer to a display, at least a portion of which is deformable into a planar surface or a curved surface. According to an embodiment, the display  230  may include a folding region  231   c , a first region  231   a  disposed on one side of the folding region  231   c  (e.g., the right region of the folding region  231   c ), and a second region  231   b  disposed on the other side of the folding region  231   c  (e.g., the left region of the folding region  231   c ). For example, the first region  231   a  may be disposed in the first surface  211  of the first housing structure  210 , and the second region  231   b  may be disposed in the third surface  221  of the second housing structure  220 . For example, the display  230  may extend from the first surface  211  to the third surface  221  across the hinge structure  264  in  FIG.  4   , and at least a region corresponding to the hinge structure  264  (e.g., the folding region  231   c ) may be a flexible region that is deformable from a flat plate shape into a curved shape. 
     According to an embodiment, the region division of the display  230  is exemplary, and the display  230  may be divided into multiple regions (e.g., four or more regions or two regions) depending on the structure or functions thereof. For example, in the embodiment illustrated in  FIG.  2   , the folding region  231   c  extends in the direction of the vertical axis (e.g., the Y axis in  FIG.  4   ) parallel to the folding axis A, and the region of the display  230  may be divided by the folding region  231   c  or the folding axis (the axis A). However, according another embodiment, the region of the display  230  may be divided with reference to another folding region (e.g., a folding region parallel to the horizontal axis (e.g., the X axis in  FIG.  4   )) or another folding axis (e.g., a folding axis parallel to the X axis in  FIG.  4   ). The aforementioned region division of the display is merely physical division based on the pair of housing structures  210  and  220  and the hinge structure (e.g., the hinge structure  264  in  FIG.  4   ), and the display  230  may display one full screen substantially through the pair of housing structures  210  and  220  and the hinge structure (e.g., the hinge structure  264  in  FIG.  4   ). According to an embodiment, the first region  231   a  and the second region  231   b  may have generally symmetrical shapes about the folding region  231   c.    
     Further referring to  FIGS.  2  and  3   , the hinge cover  265  may be disposed between the first housing structure  210  and the second housing structure  220  to cover internal components (e.g., the hinge structure  264  in  FIG.  4   ). According to an embodiment, the hinge cover  265  may be covered by a portion of each of the first and second housing structures  210  and  220  or may be exposed to the outside depending on the operating state of the electronic device  101  (the unfolded state or the folded state). 
     Hereinafter, the operations of the first housing structure  210  and the second housing structure  220  and respective regions of the display  230  depending on the operating state of the electronic device  101  (e.g., the unfolded state (extended state) and the folded state) will be described. 
     According to an embodiment, when the electronic device  101  is in the unfolded state (extended state) (e.g., the state in  FIG.  2   ), the first housing structure  210  and the second housing structure  220  may form an angle of 180 degrees therebetween, and the first region  231   a  and the second region  231   b  of the display may be disposed to face the same direction, for example, to display screens in directions parallel to each other. In addition, the folding region  231   c  may form the same plane as the first region  231   a  and the second region  232   b.    
     According to an embodiment, when the electronic device  101  is in the folded state (e.g., the state of  FIG.  3   ), the first housing structure  210  and the second housing structure  220  may be disposed to face each other. For example, when the electronic device  101  is in the folded state (e.g., the state of  FIG.  3   ), the first region  231   a  and the second region  231   b  of the display  230  may form a narrow angle (e.g., 0 to 10 degrees) therebetween and may face each other. When the electronic device  101  is in the folded state (e.g., the state of  FIG.  3   ), at least a portion of the folding region  231   c  may form a curved surface having a predetermined curvature. 
     According to an embodiment, when the electronic device  101  is in the intermediate state, the first housing structure  210  and the second housing structure  220  may be disposed to form therebetween a predetermined angle of, for example, 90 degrees or 120 degrees. For example, in the intermediate state, the first region  231   a  and the second region  231   b  of the display  230  may form an angle larger than that in the folded state and smaller than that in the unfolded state. At least a portion of the folding region  231   c  may be formed as a curved surface having a predetermined curvature, and the curvature in this case may be smaller than that in the folded state. 
       FIG.  4    is an exploded perspective view of an electronic device according to an embodiment of the disclosure. 
       FIG.  4    illustrates a direction component X, a direction component Y, and a direction component Z. According to an embodiment of the disclosure, the direction component X, the direction component Y, and the direction component Z may represent, respectively, the X axis, the Y axis, and the Z axis of a spatial coordinate system. In various embodiments of the disclosure, the X axis may indicate the width direction of the electronic device, the Y axis may indicate the length direction of the electronic device of the electronic device, and the Z axis may indicate the height direction (or thickness direction) of the electronic device. 
     Referring to  FIG.  4   , according to an embodiment, the electronic device  101  (e.g., the electronic device  101  in  FIGS.  1  to  3   ) may include a display  230 , a bracket assembly  260 , at least one printed circuit board  270  (e.g., a PCB, a flexible PCB (FPCB), or a rigid flexible PCB (RFPCB)), a first housing structure  210 , a second housing structure  220 , a first rear cover  240 , and a second rear cover  250 . The display  230  according to various embodiments of the disclosure may be referred to as a display module (e.g., the display module  160  in  FIG.  1   ) or a display assembly. 
     The display  230  may include a display panel  231  (e.g., a flexible display panel), and at least one plate  232  or layer on which the display panel  231  is seated. According to an embodiment, the plate  232  may be disposed between the display panel  231  and the bracket assembly  260 . According to an embodiment, the plate  232  may configure at least a portion of the first housing structure  210  and the second housing structure  220 . The display panel  231  may be disposed on at least portion of one surface (e.g., the surface in the Z direction in  FIG.  4   ) of the plate  232 . The plate  232  may be formed in a shape corresponding to that of the display panel  231 . 
     The bracket assembly  260  may include a first bracket  261 , a second bracket  262 , a hinge structure  264  disposed between the first bracket  261  and the second bracket  262 , a hinge cover  265  configured to cover the hinge structure  264  when the hinge structure  264  is viewed from the outside, and a wiring member  263  (e.g., a flexible printed circuit board (FPCB)) extending across the first and second brackets  261  and  262 . 
     According to an embodiment, the bracket assembly  260  may be disposed between the plate  232  and the at least one printed circuit board  270 . For example, the first bracket  261  may be disposed between the first region  231   a  of the display  230  and a first printed circuit board  271 . The second bracket  262  may be disposed between the second region  231   a  of the display  230  and a second printed circuit board  272 . 
     According to an embodiment, at least a portion of the wiring member  263  and the hinge structure  264  may be disposed inside the bracket assembly  260 . The wiring member  263  may be disposed in a direction across the first bracket  261  and the second bracket  262  (e.g., the x-axis direction). The wiring member  263  may be disposed in a direction perpendicular to the folding axis (e.g., the Y axis or the folding axis A in  FIG.  2   ) of the folding region  231   c  (e.g., the X-axis direction). 
     According to various embodiments, the hinge structure  264  may include a hinge module  264   a , a first hinge plate  264   b , and/or a second hinge plate  264   c . According to some embodiments, the hinge module  264   a  may be interpreted as including the first hinge plate  264   b  and the second hinge plate  264   c . According to an embodiment, the first hinge plate  264   b  may be mounted inside the first housing structure  210 , and the second hinge plate  264   c  may be mounted inside the second housing structure  220 . According to some embodiments, the first hinge plate  264   b  may be coupled to the first bracket  261 , and the second hinge plate  264   c  may be coupled to the second bracket  262 . According to another embodiment, the first hinge plate  264   b  (or the second hinge plate  264   c ) may be coupled to another structure (e.g., a first rotation support surface  214  or a second rotation support surface  224 ) inside the first housing structure  210  (or the second housing structure  220 ). For example, the structure to which the first hinge plate  264   b  (or the second hinge plate  264   c ) is coupled inside the first housing structure  210  (or the second housing structure  220 ) may vary according to embodiments. According to another embodiment, the hinge module  264   a  may be coupled to the first hinge plate  264   b  and the second hinge plate  264   c  to rotatably connect the second hinge plate  264   c  to the first hinge plate  264   b . For example, a folding axis (e.g., the folding axis A in  FIG.  2   ) is provided by the hinge module  264   a , and the first housing structure  210  and the second housing structure  220  (or the first bracket  261  and the second bracket  262 ) may rotate with respect to each other substantially about the folding axis A. 
     As described above, the at least one printed circuit board  270  may include a first printed circuit board  271  disposed on the first bracket  261  side and a second printed circuit board  272  disposed on the second bracket  262  side. The first printed circuit board  271  and the second printed circuit board  272  may be disposed inside a space defined by the bracket assembly  260 , the first housing structure  210 , the second housing structure  220 , the first rear cover  240 , and the second rear cover  250 . Components for implementing various functions of the electronic device  101  may be mounted on the first printed circuit board  271  and the second printed circuit board  272 . 
     According to an embodiment, the first housing structure  210  and the second housing structure  220  may be assembled so as to be coupled to the opposite sides of the bracket assembly  260  in the state in which the display  230  is coupled to the bracket assembly  260 . The first housing structure  210  and the second housing structure  220  may be slidably coupled to the opposite sides of the bracket assembly  260 , for example, to the first bracket  261  and the second bracket  262 , respectively. The first bracket  261  and the second bracket  262  are substantially accommodated in the first housing structure  210  and the second housing structure  220 . According to an embodiment, the first bracket  261  and the second bracket  262  may be interpreted as portions of the first housing structure  210  and the second housing structure  220 , respectively. 
     According to an embodiment, the first housing structure  210  may include a first rotation support surface  214 , and the second housing structure  220  may include a second rotation support surface  224 , which corresponds to the first rotation support structure  214 . The first rotation support surface  214  and the second rotation support surface  224  may include curved surfaces corresponding, respectively, to curved surfaces included in the hinge cover  265 . According to an embodiment, the first housing structure  210  may include at least one of a plurality of components  280  disposed in the sensor region  231   d  of  FIGS.  2  and  3    (e.g., a front camera device, a proximity sensor, an illuminance sensor, an iris recognition sensor, an ultrasonic sensor, or an indicator). 
     In an embodiment, when the electronic device  101  is in the unfolded state (e.g., the state of  FIG.  2   ), the first rotation support surface  214  and the second rotation support surface  224  cover the hinge cover  265 , so that the hinge cover  265  may not be exposed or may be minimally exposed to the rear surface of the electronic device  101 . In an embodiment, when the electronic device  101  is in the unfolded state (e.g., the state of  FIG.  3   ), the first rotation support surface  214  and the second rotation support surface  224  rotate, respectively, along the curved surfaces included in the hinge cover  265 , so that the hinge cover  265  can be maximally exposed to the rear surface of the electronic device  101 . 
     In the foregoing detailed description, in the first housing structure  210 , the second housing structure  220 , the first side wall structure  213 , the second side wall structure  223 , and the like, ordinal numbers are used merely to distinguish components. It is noted that the disclosure is not limited by the description of the ordinal numbers. For example, although the sensor region  231   d  is illustrated as being provided in the first housing structure  210 , the sensor region  231   d  may be provided in the second housing structure  220  or may be provided in both the first and second housing structures  210  and  220 . In another embodiment, a configuration in which the first rear region  241  and the sub-display  252  are disposed on the first rear cover  240  and the second rear cover  250 , respectively, is exemplified, but both the first rear region  241  for disposing a sensor or the like and the sub-display  252  for outputting a screen may be disposed on one of the first rear cover  240  and the second rear cover  250 . 
       FIG.  5    is a projection view illustrating an internal structure of an electronic device in a unfolded state according to an embodiment of the disclosure.  FIG.  6    is a view illustrating an antenna structure of an electronic device of  FIG.  5    according to an embodiment of the disclosure.  FIG.  7    is a cross-sectional view of an electronic device of  FIG.  5   , taken in the direction A-A′ in  FIG.  5    according to an embodiment of the disclosure. 
     Referring to  FIG.  5   , the electronic device  101  (e.g., the electronic device  101  in  FIGS.  1  to  4   ) may be provided with a foldable housing including a folding region H so that the electronic device  101  is substantially folded about a folding axis, wherein the foldable housing includes a first side wall structure  510  (e.g., the first side wall structure  213  in  FIG.  4   ) included in a first housing structure  410  (e.g., the first housing structure  210  in  FIGS.  2  to  4   ) and a second side wall structure  520  (e.g., the second side wall structure  223  in  FIGS.  2  to  4   ) included in a second housing structure  420  (e.g., the second housing structure  220  in  FIGS.  2  to  4   ). 
     The foldable housing includes at least one printed circuit board (e.g., the at least one printed circuit board  270  in  FIG.  4   ). According to an embodiment, in a region or space of the first housing structure  410  that is surrounded by the first side wall structure  510 , a first printed circuit board  710  (e.g., the first printed circuit board  271  in  FIG.  4   ) and a second printed circuit board  720  (e.g., the first printed circuit board  271  in  FIG.  4   ) may be accommodated. According to an embodiment, in a region or space of the second housing structure  420  that is surrounded by the second side wall structure  520 , a third printed circuit board  730  (e.g., the second printed circuit board  272  in  FIG.  4   ) and a fourth printed circuit board  740  (e.g., the second printed circuit board  272  in  FIG.  4   ) may be accommodated. 
     According to an embodiment, the first printed circuit board  710  may be a main PCB that includes a processor  713  (e.g., the processor  120  in  FIG.  1   ), a power management module (e.g., a PMIC), a charger IC, a wireless communication circuit, or a wireless transceiver (a radio frequency transceiver). According to an embodiment, the first printed circuit board  710  may further include a first communication device  714  and/or a second communication device  715 . According to another embodiment, the first communication device  714  and/or the second communication device  715  may be provided in a separate module form. For example, the first communication device  714  and/or the second communication device  715  may be a mmWave communication device that performs wireless communication in a frequency band of 20 GHz or higher and 100 GHz or lower. According to an embodiment, the processor  713  may include at least a communication processor (CP) or a component in which an application processor (AP) and a communication processor are integrated, and may control or drive a wireless transceiver, a power management module, a wireless communication circuit, or the like. According to an embodiment, the wireless transceiver may communicate with the processor  713  with a transmission/reception signal and/or a control signal. In another embodiment, the wireless transceiver may be included in the third printed circuit board  730  included in the second housing structure  420 . According to an embodiment, the second printed circuit board  720  may be a universal serial bus (USB) port  721 , a speaker device, or a sub-PCB including an antenna. According to an embodiment, the speaker device or the antenna may be provided in the form of a separate module and connected to the second printed circuit board  720 . 
     According to an embodiment, various components (e.g., a first camera device  711  and a second camera device  712 ) may be additionally provided on the first printed circuit board  710 , and various components (e.g., a microphone  722 ) may be additionally provided to the second printed circuit board  720  as well. In some embodiments, the camera devices  711  and  712  may be disposed adjacent to the first printed circuit board  710  in the state being separated from the first printed circuit board  710 . It should be noted that the number and arrangement of various components in various embodiments of the disclosure are not limited to the embodiment illustrated in  FIG.  5    and may be set variously according to an embodiment. 
     According to an embodiment, the third printed circuit board  730  may be a main PCB including a third communication device  733 . According to another embodiment, the third communication device  733  may be provided in the form of a separate module. For example, the third communication device  733  may be a Wi-Fi communication device that performs wireless communication in a frequency band of 900 MHz, 2.4 GHz, 3.65 Hz, 4.9 to 5.0 GHz, or 5 GHz or higher. According to an embodiment, the fourth printed circuit board  740  may be a sub-PCB including a speaker device or an antenna. According to an embodiment, the speaker device or the antenna may be provided in the form of a separate module and connected to the fourth printed circuit board  740 . 
     According to an embodiment, various components (e.g., a third camera device  732  and a receiver  731 ) may be additionally provided on the third printed circuit board  730 , and various components may be additionally provided on the fourth printed circuit board  740  as well. In some embodiments, the third camera device  732  may be disposed adjacent to the third printed circuit board  730  in the state being separated from the third printed circuit board  730 . It should be noted that the number and arrangement of various components in various embodiments of the disclosure are not limited to the embodiment illustrated in  FIG.  5    and may be set variously according to an embodiment. 
     According to an embodiment, the printed circuit boards  710 ,  720 ,  730 , and  740  may include a plurality of connectors C for electrical connection (e.g., control signal, power, or communication signal transmission) between the various components or for electrical connection among the printed circuit boards  710 ,  720 ,  730 , and  740 . In the plurality of connectors C included in the printed circuit boards  710 ,  720 ,  730 , and  740 , various types of connection structures (or connector structures), such as a flexible printed circuit (FPC) or flexible flat cable (FFC) type, a board to board (B to B) type, a zip type, a bonding type provided through a hot bar process, a low insertion force (LIF), a zero insertion force (ZIF) and the like may be adopted, and through these, relevant components may be electrically coupled to each other or respective printed circuit boards may be electrically coupled to each other. 
     According to an embodiment, in the electronic device  101 , an electrical connection structure F (or a connector structure) of a connector to connector type (or C2C type) that interconnects two different connectors C to each other may be adopted in addition to the various types of connection structures. 
     According to an embodiment, the first printed circuit board  710  and the second printed circuit board  720  may be configured to be supported from a first bracket  610  (e.g., the first bracket  261  in  FIG.  4   ) coupled to the first side wall structure  510 . According to an embodiment, the third printed circuit board  730  and the fourth printed circuit board  740  may be configured to be supported from a second bracket  620  (e.g., the second bracket  262  in  FIG.  4   ) coupled to the second side wall structure  520 . According to an embodiment, the first side wall structure  510  and the first bracket  610  may be configured separably or integrally. According to an embodiment, the second side wall structure  520  and the second bracket  620  may be configured separably or integrally. According to an embodiment, the first bracket  610  may support the first printed circuit board  710  and the second printed circuit board  720 , or may support other components (e.g., a battery  751 ) that are not mounted on the first printed circuit board  710  and the second printed circuit board  720 . According to an embodiment, the second bracket  620  may support the third printed circuit board  730  and the fourth printed circuit board  740 , or may support other components (e.g., a battery  752  and a SIM reader  761 ) that are not mounted on the third printed circuit board  730  and the fourth printed circuit board  740 . 
     According to an embodiment, the first housing structure  410  may further include a wireless charging module (not illustrated) equipped with a wireless charging part, a near field communication (NFC) antenna, and/or a magnetic secure transmission (MST) antenna. For example, the wireless charging module may be mounted on the first battery  751  supported by the first bracket  610  in the first housing structure  410 . 
     Referring to  FIG.  6   , the first housing structure  410  of the electronic device  101  includes antenna regions (e.g., a (1-1) th  antenna region  811 , a (1-2) th  antenna region  812 , a (1-3) th  antenna region  813 , a (1-4) th  antenna region  814 , a (1-5) th  antenna region  815 , a (1-6) th  antenna region  816 , a (1-7) th  antenna region  817 , and a (1-8) th  antenna region  818  in each of which an antenna is disposed. For example, a (1-1) th  antenna operating in an LB frequency band as a first main antenna may be disposed in the (1-1) th  antenna region  811 , a (1-2) th  antenna operating in an MB, HB, n77, or n78 band as a second main antenna may be disposed in the (1-2) th  antenna region  812 , a (1-3) th  antenna operating in an n41 or n79 band as a third main antenna may be disposed in the (1-3) th  antenna region  813 , and a (1-4) th  antenna operating in an mb band as a fourth main antenna may be disposed in the (1-4) th  antenna region  814 . A (1-5) th  antenna operating in an lb, mb, hb, or n41 frequency band as a first sub-antenna may be disposed in the (1-5) th  antenna region  815 , a (1-6) th  antenna operating in a 77, N78, n79, LAA1, L1, mb, or hb band as a second sub-antenna may be disposed (1-6) th  antenna region  816 , a (1-7) th  antenna operating in an N79, n77, n78, L5, or an ultra-wide (UWB9) band as a third sub-antenna may be disposed in the (1-7) th  antenna region  817 , and a (1-8) th  antenna operating in an n77, n78, n79, or LAA2 band as a fourth sub-band may be disposed in the (1-8) th  antenna region  818 . The number of antenna regions included in the first housing structure  410  is limited to eight in  FIG.  6   , the number and locations of antenna regions are not limited thereto and may be changed as necessary. 
     According to an embodiment, the second housing structure  420  of the electronic device  101  may include antenna regions (e.g., a (2-1) th  antenna region  821  and a (2-2) th  antenna region  822 ) in each of which an antenna is disposed. For example, a (2-1) th  antenna operating as a first Wi-Fi antenna may be disposed in the (2-1) th  antenna region  821 , and a (2-2) th  antenna operating as a second Wi-Fi antenna may be disposed in the (2-2) th  antenna region  822 . The number of antenna regions included in the second housing structure  420  is limited to two in  FIG.  6   , the number and locations of antenna regions are not limited thereto and may be changed as necessary. 
     According to an embodiment, the first side wall structure  510  may include at least one split portion  531 ,  532 ,  533 ,  534 ,  535 , or  536 . According to an embodiment, the at least one split portion  531 ,  532 ,  533 ,  534 ,  535 , or  536  may be formed of an insulator. According to an embodiment, the at least one split portion  531 ,  532 ,  533 ,  534 ,  535 , or  536  may be molded into the first side wall structure  510  through a double-injection molding or insert molding method of a synthetic resin. However, without being limited thereto, the at least one split portion  531 ,  532 ,  533 ,  534 ,  535 , or  536  may be made of various materials having insulating properties. According to an embodiment, the first side wall structure  510  may include unit side wall portions  511 ,  512 ,  513 ,  514 ,  515 ,  516 , and  517  split by respective split portions  531 ,  532 ,  533 ,  534 ,  535 , and  536 . For example, a (1-2) th  side wall portion  512  may maintain the state of being separated from a (1-1) th  side wall portion  511  and a (1-3) th  side wall portion  513  by a (1-1) th  split portion  531  and a (1-2) th  split portion  532 , a (1-4) th  side wall portion  514  may maintain the state of being separated from a (1-3) th  side wall portion  513  and a (1-5) th  side wall portion  515  by a (1-3) th  split portion  533  and a (1-4) th  split portion  534 , and a (1-6) th  side wall portion  516  may maintain the state of being separated from a (1-5) th  side wall portion  515  and a (1-7) th  side wall portion  517  by a (1-5) th  split portion  535  and a (1-6) th  split portion  536 . According to an embodiment, at least one of the unit side wall portions  511 ,  512 ,  513 ,  514 ,  515 ,  516 , and  517  may operate as an antenna operating in a specific frequency band. For example, the (1-1) th  side wall portion  511  may operate as the (1-6) th  antenna disposed in the (1-6) th  antenna region  816 , the (1-2) th  side wall portion  512  may operate as the (1-7) th  antenna disposed in the (1-7) th  antenna region  817 , the (1-3) th  side wall portion  513  may operate as the (1-5) th  antenna disposed in the (1-5) th  antenna region  815 , the (1-5) th  side wall portion  515  may operate as the (1-1) th  antenna disposed in the (1-1) th  antenna region  811 , the (1-6) th  side wall portion  516  may operate as the (1-2) th  antenna disposed in the (1-2) th  antenna region  812 , and the (1-7) th  side wall portion  517  may operate as the (1-4) th  antenna disposed in the (1-4) th  antenna region  814 . The number of split portions included in the first side wall structure  510  is limited to six in  FIG.  6   , the number and locations of split portions are not limited thereto and may be changed as necessary. 
     According to an embodiment, the second side wall structure  520  may include at least one split portion  541 ,  542 ,  543 ,  544 ,  545 , or  546 . According to an embodiment, the at least one split portion  541 ,  542 ,  543 ,  544 ,  545 , or  546  may be formed of an insulator. According to an embodiment, the at least one split portion  541 ,  542 ,  543 ,  544 ,  545 , or  546  may be molded into the second side wall structure  520  through a double-injection molding or insert molding method of a synthetic resin. However, without being limited thereto, the at least one split portion  541 ,  542 ,  543 ,  544 ,  545 , or  546  may be made of various materials having insulating properties. According to an embodiment, the second side wall structure  520  may include unit side wall portions  521 ,  522 ,  523 ,  524 ,  525 ,  526 , and  527  split by respective split portions  541 ,  542 ,  543 ,  544 ,  545 , and  546 . For example, a (2-2) th  side wall portion  522  may maintain the state of being separated from a (2-1) th  side wall portion  521  and a (2-3) th  side wall portion  523  by a (2-1) th  split portion  541  and a (2-2) th  split portion  542 , a (2-4) th  side wall portion  524  may maintain the state of being separated from a (2-3) th  side wall portion  523  and a (2-5) th  side wall portion  525  by a (2-3) th  split portion  543  and a (2-4) th  split portion  544 , and a (2-6) th  side wall portion  526  may maintain the state of being separated from a (2-5) th  side wall portion  525  and a (2-7) th  side wall portion  527  by a (2-5) th  split portion  545  and a (2-6) th  split portion  546 . According to an embodiment, at least one of the unit side wall portions  521 ,  522 ,  523 ,  524 ,  525 ,  526 , and  527  may operate as an antenna operating in a specific frequency band. For example, the (2-1) th  side wall portion  521  may operate as the (2-1) th  antenna disposed in the (2-1) th  antenna region  821 , and the (2-3) th  side wall portion  523  may operate as the (2-2) th  antenna disposed in the (2-2) th  antenna region  821 . The number of split portions included in the second side wall structure  520  is limited to six in  FIG.  6   , the number and locations of split portions are not limited thereto and may be changed as necessary. 
     Referring to  FIG.  7   , a heat dissipation structure  900  may be disposed in the first housing structure  410  of the electronic device  101 . According to an embodiment, the heat dissipation structure  900  may include a first printed circuit board  710 , at least one heating element  910  (e.g., the processor  713  of  FIG.  5   ) disposed on the first printed circuit board  710 , a shield can  920  coupled to at least one surface of the first printed circuit board  710  and including a shape (e.g., a closed tetragonal loop) surrounding at least a portion of the at least one heating element  910 , at least one heat transfer member  930  (e.g., a carbon fiber thermal interface material (TIM)) disposed on the at least one heating element  810  and transferring heat generated by the at least one heating element  910 , a heat diffusion structure  940  disposed over at least one heat transfer member  930  and at least a portion of the shield can  920 , configured to provide a shielding function against electromagnetic waves that may be generated by the at least one heating element  910 , and configured to provide a function of transferring heat capable of being generated by the at least one heating element  910  to the outside, at least a portion of the first bracket  610  disposed on the heat diffusion structure  940  and configured to quickly dissipate the heat transferred from the at least one heating element  910  to the outside of the electronic device  101 , and/or a heat diffusion material (e.g., a vapor chamber or a laminated graphite)  950  disposed on the at least a portion of the first bracket  610 . In the illustrated embodiment, the first printed circuit board  710  is exemplified as a single board, but the various embodiments disclosed herein are not limited thereto, and may include a structure in which a plurality of boards are coupled to face each other. When the first printed circuit board  710  has a structure in which a plurality of boards are coupled to face each other, the at least one heating element  910  may be disposed to form a multilayer with a heating element disposed on another board in the first printed circuit board  710 . 
     According to an embodiment, the heat diffusion structure  940  may include a heat dissipation member  942  and an elastic member  841  provided along an edge of the heat dissipation member  942 . The heat dissipation member  942  of the heat diffusion structure  940  may be disposed in direct contact with the at least one heat transfer member  930 , and may diffuse the heat transferred from the at least one heating element  910  and transfer the heat to at least a portion of the first bracket  610 . An elastic member  941  of the heat diffusion structure  940  may be connected to the heat dissipation member  942  and disposed on a portion of the shield can  920  to provide an overall elastic force to the heat diffusion structure  940 . A heat transfer path connected from the at least one heating element  910  and/or the shield can  920  to at least a portion of the first bracket  610  may be expanded and the at least one heating element  910  may be protected from an external impact by the elastic force of the elastic member  941 . 
     An embodiment in which at least a portion of the first bracket  610  and the heat diffusion material  950  are both disposed on the heat diffusion structure  940  have been described above with reference to  FIG.  7   , but the at least a portion of the first bracket  610  may be omitted and the heat diffusion material  950  may be disposed directly on the heat diffusion structure  940 . 
       FIG.  8    is a view illustrating an embodiment in which a second housing structure of an electronic device of  FIG.  5    is formed of different metal materials according to an embodiment of the disclosure. 
     Referring to  FIG.  8   , the first side wall structure  510  included in the first housing structure  410  of the electronic device  101  may include a metal material having high electrical conductivity for the performance of the communication device (e.g., antenna performance). For example, the first side wall structure  510  may include an aluminum (Al) material. 
     According to an embodiment, the first printed circuit board  710  included in the first housing structure  410  may include a structure in which one or more heating elements (e.g., the processor  713  in  FIG.  5   , a PMIC, and a charger IC), which are heat sources that generate heat, are arranged in multiple layers (e.g., a plurality of PBAs connected by an interposer). For example, the plurality of heating elements may be disposed on the first printed circuit board  710 . According to an embodiment, the first bracket  610  coupled to the first side wall structure  510  may include a metal material having high thermal conductivity for heat dissipation performance (e.g., heat transfer or emission). For example, the first bracket  610  coupled to the first side wall structure  510  may include an Al material. 
     According to an embodiment of the disclosure, the first bracket  610  may include the same metal material as the first side wall structure  510  in order to lower the resistance of a ground (GND) connected to an antenna. For example, the first bracket  610  and the first side wall structure  510  may include an Al material. According to an embodiment, the first side wall structure  510  and the first bracket  610  may be configured integrally. 
     According to an embodiment, the second housing structure  420  may include a sub-display (e.g., the sub-display  252  in  FIGS.  2  to  4   ) disposed in a region of the rear cover (e.g., the second rear cover  250  in  FIGS.  2  to  4   ). According to an embodiment, the third printed circuit board  730  included in the second housing structure  420  may include a structure in which one or more heating elements (e.g., the third communication device  733  of  FIG.  5   , a speaker amplifier, a camera filter, and a power module) are arranged in a single layer (e.g., a single-layer PBA structure). For example, by provided in a single-layer PBA structure when the sub-display is disposed in a region of the rear cover, the third printed circuit board  730  may not interfere with a flexible display (e.g., the display  130  in  FIG.  4   ) and/or the sub-display. According to an embodiment, elements that generate relatively less heat compared to the first printed circuit board  710  included in the first housing structure  410  may be disposed on the third printed circuit board  730 . 
     According to an embodiment, the second side wall structure  520  may include a metal material having high electrical conductivity for performance of a communication device (e.g., antenna performance). For example, the second side wall structure  520  may include an Al material. 
     According to an embodiment, the second bracket  620  coupled to the second side wall structure  520  may include a metal material having a low specific gravity for weight reduction. For example, in the second housing structure  420 , the third printed circuit board  730  may include elements that generate relatively less heat compared to the first printed circuit board  710  included in the first housing structure  410 . Thus, the degree of design freedom of the second bracket  620  may be higher than that of the first bracket  610  included in the first housing structure  410  in terms of material selection. According to an embodiment, since the second bracket  620  includes a metal material having a low specific gravity, it is possible to reduce the weight increased by the sub-display compared to the first housing structure  410 . For example, the second bracket  620  may include a magnesium (Mg) material having a low specific gravity. According to an embodiment, the second side wall structure  520  and the second bracket  620  may include different metal materials. According to an embodiment, the second side wall structure  520  and the second bracket  620  may be configured separably. For example, the second side wall structure  520  and the second bracket  620  may be assembled or coupled to each other through a bonding method, such as welding. 
     Referring to  FIG.  8   , the same metal material is shaded in the same manner for convenience of description. For example, in  FIG.  8   , it can be seen that the first sidewall structure  510 , the first bracket  610 , and the second side wall structure  520  are shaded in the same way to indicate that they are made of the same metal material (e.g., Al), and the second bracket  620  and the second side wall structure  520  are shaded in different ways to indicate that the second bracket is made of a material (e.g., Mg) different from that of the second side wall structure  520 . 
     When at least a portion of a side wall structure (e.g., the first side wall structure  510  or the second side wall structure  520 ) in the electronic device  101  of  FIG.  8    operates as an antenna, the ground portion of the antenna may mean a ground portion of components (included in the printed circuit board) directly or indirectly connected to an antenna feeding portion of the antenna among the components included in a printed circuit board (the first printed circuit board  710 , the second printed circuit board  720 , the third printed circuit board  730 , or the fourth printed circuit board  740 ). Hereinafter, when at least a portion of the first side wall structure  510  operates as a first antenna in the first housing structure  410  in which the first side wall structure  510  and the first bracket  610  include the same metal material, the connection state between the ground portion of the first antenna and the ground portion of the first printed circuit board  710  (or the second printed circuit board  720 ) will be described with reference to  FIGS.  9 A and  9 B . When at least a portion of the second side wall structure  520  operates as a second antenna in the second housing structure  420  in which the second side wall structure  520  and the second bracket  620  include different metal materials, the connection state between the ground portion of the second antenna and the ground portion of the third printed circuit board  730  (or the fourth printed circuit board  740 ) will be described with reference to  FIGS.  10 A and  10 B . 
       FIGS.  9 A and  9 B  are views each illustrating a ground portion of a first antenna  518  in the first housing structure  410  of the electronic device  101  of  FIG.  8    according to an embodiment of the disclosure.  FIG.  9 A  illustrates an embodiment in which the ground portion of the first antenna  518  is connected to a ground portion of a component indirectly connected to the feeding portion of the first antenna  518 , and  FIG.  9 B  illustrates an embodiment in which the ground portion of the first antenna  518  is connected to a ground portion of a component directly connected to the feeding portion of the first antenna  518 . 
     Referring to  FIG.  9 A , at least a portion of the first side wall structure  510  of the electronic device  101  (e.g., the (1-1) th  side wall portion  511 ) may operate as the first antenna  518 . According to an embodiment, the first antenna  518  may include a first switch portion  518 - 1 , a first feeding portion  518 - 3 , and a first ground portion  518 - 2 . According to an embodiment, the first switch portion  518 - 1  of the first antenna  518  may be connected to a first component  911  (e.g., a switch) included in the first printed circuit board  710 , and the first component  911  may be connected to a ground portion  710 - 1  of the first printed circuit board  710 . According to an embodiment, the first feeding portion  518 - 3  of the first antenna  518  may be connected to a second component  912  (e.g., a passive element) included in the first printed circuit board  710 , and the second component  912  may be connected to the first component  911  and indirectly connected to the ground portion  710 - 1  of the first printed circuit board  710 . According to an embodiment, the ground portion  710 - 1  of the first printed circuit board  710  may be connected to the first bracket  610  and may be directly connected to the first ground portion  518 - 2  of the first antenna  518 . 
     Referring to  FIG.  9 B , at least a portion of the first side wall structure  510  of the electronic device  101  (e.g., the (1-1) th  side wall portion  511 ) may operate as the first antenna  518 . According to an embodiment, the first antenna  518  may include a first switch portion  518 - 1 , a first feeding portion  518 - 3 , and a first ground portion  518 - 2 . According to an embodiment, the first switch portion  518 - 1  of the first antenna  518  may be connected to a third component  913  (e.g., a switch) included in the first printed circuit board  710 , and the third component  913  may be connected to the ground portion  710 - 1  of the first printed circuit board  710 . According to an embodiment, the first feeding portion  518 - 3  of the first antenna  518  may be connected to the third component  913  included in the first printed circuit board  710 . According to an embodiment, the ground portion  710 - 1  of the first printed circuit board  710  may be connected to the first bracket  610 , and the first ground portion  518 - 2  of the first antenna  518  may be connected to the first bracket  610 , so that the first ground portion  518 - 2  of the first antenna  518  may be indirectly connected to the ground portion  710 - 1  of the first printed circuit board  710 . 
     An embodiment in which the first ground portion  518 - 2  of the first antenna  518  is directly or indirectly connected to the ground portion  710 - 1  of the first printed circuit board  710  has been described with reference to  FIGS.  9 A and  9 B , the embodiment of  FIGS.  9 A and  9 B  is also applicable to the second printed circuit board  720  included in the first housing structure  410 . 
       FIGS.  10 A and  10 B  are views each illustrating a ground portion of a second antenna  528  in a second housing structure  420  of an electronic device of  FIG.  8    according to an embodiment of the disclosure.  FIG.  10 A  illustrates an embodiment in which a ground portion of a second antenna  528  is connected to a ground portion of a component indirectly connected to a feeding portion of a second antenna  528 , and  FIG.  10 B  illustrates an embodiment in which a ground portion of a second antenna  528  is connected to a ground portion of a component directly connected to a feeding portion of a second antenna  528 . 
     Referring to  FIG.  10 A , at least a portion of the second side wall structure  520  of the electronic device  101  (e.g., the (2-1) th  side wall portion  521 ) may operate as the second antenna  528 . According to an embodiment, the second antenna  528  may include a second switch portion  528 - 1 , a second feeding portion  528 - 3 , and a second ground portion  528 - 2 . According to an embodiment, the second switch portion  528 - 1  of the second antenna  528  may be connected to a fourth component  921  (e.g., a switch) included in the third printed circuit board  730 , and the fourth component  921  may be connected to the ground portion  730 - 1  of the third printed circuit board  730 . According to an embodiment, the second feeding portion  528 - 3  of the second antenna  528  may be connected to a fifth component  922  (e.g., a passive element) included in the third printed circuit board  730 , and the fifth component  922  may be connected to the fourth component  921  and indirectly connected to the ground portion  730 - 1  of the third printed circuit board  730 . According to an embodiment, the ground portion  730 - 1  of the third printed circuit board  730  may be connected to the second bracket  620 , and the second ground portion  528 - 2  of the second antenna  528  may be directly connected to the ground portion  730 - 1  of the third printed circuit board  730 . 
     Referring to  FIG.  10 B , at least a portion of the second side wall structure  520  of the electronic device  101  (e.g., the (2-1) th  side wall portion  521 ) may operate as the second antenna  528 . According to an embodiment, the second antenna  528  may include a second switch portion  528 - 1 , a second feeding portion  528 - 3 , and a second ground portion  528 - 2 . According to an embodiment, the second switch portion  528 - 1  of the second antenna  528  may be connected to a sixth component  923  (e.g., a switch) included in the third printed circuit board  730 , and the sixth component  923  may be connected to the ground portion  730 - 1  of the third printed circuit board  730 . According to an embodiment, the second feeding portion  528 - 3  of the second antenna  528  may be connected to the sixth component  923  included in the third printed circuit board  730 . According to an embodiment, the ground portion  730 - 1  of the third printed circuit board  730  may be connected to the second bracket  620 , and the second ground portion  528 - 2  of the second antenna  528  may be directly connected to the ground portion  730 - 1  of the third printed circuit board  730 . 
     An embodiment in which the second ground portion  528 - 3  of the second antenna  528  is directly connected to the ground portion  730 - 1  of the third printed circuit board  730  has been described with reference to  FIGS.  10 A and  10 B , the embodiment of  FIGS.  10 A and  10 B  is also applicable to the fourth printed circuit board  740  included in the second housing structure  420 . 
     Referring to  FIGS.  9 A,  9 B,  10 A, and  10 B , in the case of the first housing structure  410 , since the first side wall structure  510  and the first bracket  610  include the same metal material, the first ground portion  518 - 2  of the first antenna  518  and the ground portion  710 - 1  of the first printed circuit board  710  may be directly or indirectly connected to each other, but in the case of the second housing structure  420 , since the second side wall structure  520  and the second bracket  620  include different metal materials, the second ground portion  528 - 2  of the second antenna  528  and the ground portion  730 - 1  of the third printed circuit board  730  may only be directly connected to each other. 
       FIG.  11    is an enlarged view of a region A of a first side wall structure of an electronic device of  FIG.  8    according to an embodiment of the disclosure.  FIG.  12    is an enlarged view of a region B of a second side wall structure of an electronic device of  FIG.  8    according to an embodiment of the disclosure. 
     Referring to  FIG.  11   , the first side wall structure  510  may include a (1-2) th  side wall portion  511  separated from a (1-1) th  side wall portion and a (1-3) th  side wall portion by a (1-1) th  split portion  531  and a (1-2) th  split portion  532 . According to an embodiment, the (1-2) th  side wall portion  512  may operate as an antenna of the electronic device  101 . For example, the (1-2) th  side wall portion  512  may operate as the (1-7) th  antenna disposed in the (1-7) th  antenna region  817  of  FIG.  8   . According to an embodiment, when operating as the antenna, the (1-2) th  side wall portion  512  may include a portion  1011  to which the feeding portion of the antenna is connected and a portion  1012  to which the switch portion of the antenna is connected. According to an embodiment, when the (1-2) th  side wall portion  512  operates as the antenna, the first bracket  610  may include a portion  1013  to which the ground portion of the antenna is connected. According to an embodiment, the portion  1011  to which the feeding portion of the antenna included in the (1-2) th  side wall portion  512  is connected, the portion  1012  to which the switch portion of the antenna is connected, and the portion  1013  to which the ground portion of the antenna included in the first bracket  610  is connected may be electrically connected to a first flexible printed circuit board (FPCB)  1110 , and the first flexible printed circuit board  1110  may be electrically connected to the first printed circuit board  710  in first housing structure  410  via a connector. For example, when the (1-2) th  side wall portion  512  operates as the antenna, the ground portion of the antenna may be connected to the portion  1013  to which the ground portion of the antenna included in the first bracket  610  is connected, and may be indirectly electrically connected to the ground portion of the first printed circuit board  710  via the first flexible printed circuit board  1110 . According to another embodiment, when the (1-2) th  side wall portion  512  operates as the antenna, the portion  1011  to which the feeding portion of the antenna is connected without the portion  1012  to which the switch portion of the antenna is connected and the antenna portion  1013  to which the ground portion of the antenna is connected may be included in the (1-2) th  side wall portion  512  and the first bracket  610 , respectively. 
     Referring to  FIG.  11   , the first side wall structure  510  and the first bracket  610  are made of the same metal material (e.g., Al), and the first side wall structure  610  and the first bracket  610  are integrally configured to minimize resistance due to the bonding structure of the first side structure  510  and the first bracket  610 , so that the portion  1013  to which the ground portion of the antenna is connected may be located in the first bracket  610 . 
     Referring to  FIG.  12   , the second side wall structure  520  may include a (2-2) th  side wall portion  522  separated from a (2-1) th  side wall portion  521  and a (2-3) th  side wall portion  523  by a (2-1) th  split portion  541  and a (2-2) th  split portion  542 . According to an embodiment, the (2-2) th  side wall portion  522  may operate as an antenna of the electronic device  101 . According to an embodiment, when operating as the antenna, the (2-2) th  side wall portion  522  may include a portion  1021  to which the feeding portion of the antenna is connected, a portion  1022  to which the switch of the antenna is connected, and a portion  1023  to which the ground portion of the antenna is connected. According to an embodiment, the portion  1021  to which the feeding portion of the antenna included in the (2-2) th  side wall portion  522  is connected, the portion  1022  to which the switch portion of the antenna is connected, and the portion  1023  to which the ground portion of the antenna is connected may be electrically connected to a second flexible printed circuit board  1120 , and the second flexible printed circuit board  1120  may be electrically connected to the third printed circuit board  730  in second housing structure  420  via a connector. For example, when the (2-2) th  side wall portion  522  operates as the antenna, the ground portion of the antenna may be connected to the portion  1023  to which the ground portion of the antenna included in the (2-2) th  side wall portion  522  is connected, and may be directly electrically connected to the ground portion of the third printed circuit board  730  via the second flexible printed circuit board  1120 . According to another embodiment, when the (2-2) th  side wall portion operates as the antenna, the portion  1021  to which the feeding portion of the antenna is connected without the portion  1022  to which the switch portion of the antenna is connected and the portion  1023  to which the ground portion of the antenna is connected may be included in the (2-2) th  side wall portion  522 . 
     In  FIG.  12   , when the second side wall structure  520  and the second bracket  620  are made of different metals (e.g., the second side wall structure  520  is made of Al and the second bracket  620  is made of Mg), it is possible to prevent an impedance mismatch or an increase in electrical resistance due to a difference in electrical conductivity and/or a difference in electrical conductivity between the different metals by placing the portion  1023  to which the ground of the antenna is connected on the second side wall structure  520  (e.g., the (2-2) th  side wall portion  522 ) together the portion  1022  to which the switch portion of the antenna is connected and the portion  1021  to which the feeding portion of the antenna is connected. 
       FIG.  13    is a cross-sectional view of an electronic device taken in a B-B′ direction according to an embodiment of the disclosure. 
     Referring to  FIG.  13   , the inside of the first side wall structure  510  of the electronic device  101  may include a recess  1210 . According to an embodiment, at least a portion of the first bracket  610  may be inserted into the recess  1210  to be electrically coupled to the first side wall structure  510 . According to an embodiment, at least a portion of the first printed circuit board  710  may be electrically coupled to the first bracket  610 , and another portion of the first printed circuit board  710  may be electrically coupled to the first side wall structure  510 . According to an embodiment, at least a portion of the rear cover  240  (e.g., the first rear cover  240  in  FIGS.  2  to  4   ) may be coupled to the first bracket  610 , and another portion of the rear cover  240  may be coupled to the first side wall structure  510 . 
       FIG.  14    is a cross-sectional view of an electronic device taken in a C-C′ direction according to an embodiment of the disclosure.  FIG.  15    is a cross-sectional view of an electronic device taken in the D-D′ direction according to an embodiment of the disclosure.  FIG.  14    illustrates a connective relationship between a second side wall structure  520  and a second bracket  620  when at least a portion of a second side wall structure  520  operates as an antenna.  FIG.  15    illustrates a connective relationship between a second side wall structure  520  and a second bracket  620  when at least a portion of a second side wall structure  520  does not operate as an antenna. 
     Referring to  FIG.  14   , at least a portion of the second side wall structure  520  of the electronic device  101  may be bonded by an adhesive member  1310  to at least a portion of a plate  232  (e.g., the plate  232  in  FIG.  4   ) on which a display panel  231  (e.g., the display panel  231  in  FIG.  4   ) is seated and which is disposed between the display panel  231  and the second bracket  620 , and may be bonded to at least a portion of the rear cover  250  (e.g., the second rear cover  250  in  FIGS.  2  to  4   ) by an adhesive member  1310 . According to an embodiment, the second bracket  620  may be separated from the second bezel structure  520  through a space D therebetween. According to an embodiment, the space D may be filled with a non-conductive material to physically interconnect the second bracket  620  and the second bezel structure  520 . 
     Referring to  FIG.  15   , the inside of the second side wall structure  520  of the electronic device  101  may include a recess  1410 . According to an embodiment, at least a portion of the second bracket  620  may be inserted into the recess  1410  to be electrically coupled to the second side wall structure  520 . According to an embodiment, at least a portion of the third printed circuit board  730  may be electrically coupled to the second bracket  620 , and another portion of the third printed circuit board  730  may be electrically coupled to the second side wall structure  520 . According to an embodiment, at least a portion of the rear cover  250  (e.g., the second rear cover  250  in  FIGS.  2  to  4   ) may be coupled to the second bracket  620 , and another portion of the rear cover  250  may be coupled to the second side wall structure  520 . 
       FIG.  16    is a view illustrating an embodiment in which a second housing structure of an electronic device of  FIG.  5    is formed of a same metal material according to an embodiment of the disclosure.  FIG.  17    is a cross-sectional view of an electronic device of  FIG.  16    taken in a E-E′ direction according to an embodiment of the disclosure. 
     Referring to  FIGS.  16  and  17   , in the electronic device  101 , a portion of the second side wall structure  520  included in the second housing structure  420  may include a non-conductive material (e.g., ceramic) for aesthetic appearance. According to an embodiment, the second side wall structure  520  included in the second housing structure  420  of the electronic device  101  may include a (2-1) th  side wall structure  520 - 1  including a non-conductive material and a (2-2) th  second side wall structure  520 - 2  including a metal material. According to an embodiment, the second housing structure  420  may include a structure in which at least a portion of the (2-2) th  side wall structure  520 - 2  is separated from the second bracket  620 . According to an embodiment, between the at least portion of the (2-2) th  side wall structure  520 - 2  and the second bracket  620 , a non-conductive material  1510  may be injection molded in order to physically interconnect the at least a portion of the (2-2) th  side wall structure  520 - 2  and a second bracket  620 . 
     According to an embodiment, the (2-2) th  side wall structure  520 - 2  may include at least one pair of split portions  1610 . According to an embodiment, the at least one pair of split portions  1610  may be formed of an insulator. According to an embodiment, the at least one pair of split portions  1610  may be molded into the (2-2) th  side wall structure through a double-injection molding method or an insert molding method of a synthetic resin. However, the disclosure is not limited thereto, and the at least one pair of split portions  1610  may be made of various materials having an insulating property. According to an embodiment, the (2-2) th  side wall structure  520 - 2  may include a side wall portion  1710  split by the one pair of split portions  1610 . 
     According to an embodiment, the side wall portion  1710  may operate as an antenna of the electronic device  101 . According to an embodiment, the side wall portion  1710  may include a first portion  1710 - 1  that extends to the (2-1) th  side wall structure  520 - 1  to emit a signal, and a second portion  1710 - 2  that includes at least one antenna element  1711  (e.g., a switch portion of the antenna, a feeding portion of the antenna, or a ground portion of the antenna). According to an embodiment, the at least one antenna element  1711  may be electrically connected to the third printed circuit board  730  in the second housing structure  420  via an antenna connection portion  1721  (e.g., a C-clip). 
     According to an embodiment, when a portion of the at least one antenna element  1711  included in the first portion  1710 - 1  of the side wall portion  1710  is located on the second bracket  620 , the (2-2) th  side wall structure  520 - 2  including the side wall portion  1710  and the second bracket  620  may include the same metal material in order to prevent the occurrence of signal distortion due to a difference in electrical conductivity between different metals and/or an increase in impedance mismatch or electrical resistance due to the difference in electrical conductivity. 
     According to an embodiment, the second housing structure  420  may include a display  230  (e.g., the display  230  in  FIGS.  2  to  4   ) and a window glass  233  that protects the display  230 . According to an embodiment, the second housing structure  420  may include a sub-display  252  (e.g., the sub-display  252  in  FIGS.  2  to  4   ) disposed in a region of the rear cover  250  (e.g., the second rear cover  250  in  FIGS.  2  to  4   ). 
     According to an embodiment, the second housing structure  420  may be relatively heavy in weight compared to the first housing structure (not illustrated) due to an additional configuration such as the sub-display  252 . Thus, in order to reduce the weight of the second housing structure  420 , the (2-2) th  side wall structure  520 - 2  and the second bracket  620  included in the second housing structure  420  may include a metal material having a low specific gravity. For example, the (2-2) th  side wall structure  520 - 2  and the second bracket  620  may include a Mg material. 
     According to an embodiment, the (2-2) th  side wall structure  520 - 2  and the second bracket  620  included in the second housing structure  420  may include a metal material having a low specific gravity (e.g., Mg) for weight reduction. According to an embodiment, since the side wall portion  1710  included in the (2-2) th  side wall structure  520 - 2  includes the same metal material as the second bracket  620 , signal distortion due to an increase in impedance mismatch or electrical resistance due to a difference in electrical conductivity may not occur even when a portion of the at least one antenna element  1711  included in the first portion  1710 - 1  of the side wall portion  1710  is located in the second bracket  620 . According to an embodiment, since the (2-2) th  side wall structure  520 - 2  and the second bracket  620  included in the second housing structure  420  may include the same metal having low electrical conductivity (e.g., Mg), the second housing structure  420  may further include a signal amplifier (e.g., a power amplifier module (PAM)) in order to compensate for signal distortion (e.g., signal loss) due to low electrical conductivity. 
     According to an embodiment of the disclosure, an electronic device (e.g.,  101  in  FIGS.  1  to  5   ) may include a foldable housing including: a hinge structure (e.g., the hinge structure  264  in  FIG.  4   ), a first housing (e.g., the first housing  210  in  FIGS.  2  to  4    or the first housing  410  in  FIGS.  5  and  6   ) connected to the hinge structure and including a first side wall structure and a first bracket located inside the first side wall structure, and a second housing (e.g., the second housing  220  in  FIGS.  2  to  4    or the second housing  420  in  FIGS.  5  and  6   ) connected to the hinge structure and including a second side wall structure and a second bracket located inside the second side wall structure, the second housing being folded with the first housing about the hinge structure, a display panel (e.g., the display panel  231  in  FIGS.  2  and  3   ) extending from the first housing to the second housing across the hinge structure and configured to output a screen, and a second antenna structure (e.g., the second antenna structure  542  in  FIGS.  5  and  6   ) including a second ground and a second feeding portion disposed on the second side wall structure of the second housing, wherein the first side wall structure of the first housing and the second side wall structure of the second housing may include a first metal material, and the first bracket of the first housing includes the first metal material, and the second bracket of the second housing may include a second metal material. 
     In the electronic device (e.g.,  101  of  FIGS.  1  to  5   ) according to an embodiment, the first metal material has higher electrical conductivity and thermal conductivity than the second metal material, and the second metal material may have a lower specific gravity than the first metal. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the first metal material may be aluminum (Al). 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the second metal material may be a magnesium (Mg) material. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the second antenna structure may further include a second antenna switch disposed on the second side wall structure of the second housing. 
     The electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment may further include a first antenna structure provided by a portion of the first housing, wherein the first antenna structure may include a first feeding portion disposed on the first side wall structure, and a first ground disposed on the first bracket. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the first antenna structure may further include a first antenna switch disposed on the first side wall structure of the first housing. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the first side wall structure and the first bracket may be integrally configured. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the second side wall structure and the second bracket may be separably configured. 
     The electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment may further include a sub-display panel that is disposed on a surface of the second housing that is opposite to the surface on which the display panel is disposed. 
     The electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment may further include a first printed circuit board supported by the first bracket, and a second printed circuit board supported by the second bracket. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the first printed circuit board may have a structure in which one or more heating elements, which are heat sources, are disposed in multiple layers. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the second printed circuit board may have a structure in which one or more heating elements, which are heat sources, are disposed in a single layer. 
     The electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment may further include a heat dissipation structure disposed on the first printed circuit board. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to an embodiment, the heat dissipation structure may include: a shield can mounted on one surface of the first printed circuit board in a state of accommodating the heating elements and having a shape surrounding at least some of the heating elements, a heat transfer member disposed on the heating elements and configured to transfer heat generated by the heating elements, and a heat diffusion structure disposed on at least a portion of the heat transfer member and the shield can to provide a function of transferring outward heat generated by the heating elements, wherein the heat diffusion structure may be disposed to be at least partially in contact with the first bracket. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to various embodiments, the heat generated from the heating element may move to the first bracket via the heat transfer member and the heat diffusion structure. 
     In the electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to various embodiments, the heat dissipation structure may further include a vapor chamber that is disposed on the first bracket and absorbs or diffuses heat transferred thereto from the heat diffusion structure via the first bracket. 
     In an electronic device (e.g.,  101  in  FIGS.  1  to  5   ) according to various embodiments, the heat diffusion structure may include a heat dissipation member and an elastic member disposed along an edge of the heat dissipation member, the heat dissipation member may be disposed to be in direct contact with the heat transfer member and is configured to diffuse heat transferred thereto from the heating element, and the elastic member may be connected to the heat dissipation member and disposed on a portion of the shield can. 
     In the electronic device (e.g.,  101  of  FIGS.  1  to  5   ) according to various embodiments, the second side wall structure may be coupled, by an adhesive member, to at least a portion of a plate on which the display panel is seated and disposed between the display panel and the second bracket, and a separated space may be included between the second side wall structure and the second bracket. 
     The electronic device (e.g.,  101  in  FIGS.  1  to  5   ), may further include a second recess provided inside the second side wall structure, wherein the second bracket may be at least partially inserted into the second recess to be coupled to the second side wall structure. 
     While the disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.