Electronic device

Abstract

The present application provides an electronic device. The electronic device comprises a first housing and a second housing which are foldable, and an antenna. The antenna uses a conductive portion of a frame of a housing as a radiator. When the electronic device is in a closed state, a cavity is formed between a first metal layer located on the first housing and a second metal layer located on the second housing. Resonance generated in the cavity by coupling of the antenna has little impact on radiation of the antenna, and the antenna still has good radiation characteristics.

Description

Electronic device

[0001] The present application claims priority to the Chinese Patent Application No. 202411081435.3, filed on August 7, 2024, and entitled "Electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of wireless communication, and in particular to an electronic device. BACKGROUND

[0003] With the rapid development of wireless communication technology, the past second generation (2G) mobile communication system mainly supports the function of call, and the electronic device is only a tool for people to send and receive short messages and voice communication. The wireless Internet function is extremely slow because the data transmission uses voice channels for transmission. Nowadays, in addition to being used for calling, sending short messages and taking pictures, electronic devices can also be used for online music listening, network video watching, real-time video, etc., covering various aspects of people's life such as calling, video entertainment and e-commerce. This has caused the number of antennas that need to be set in the electronic device to gradually increase.

[0004] For a foldable electronic device, in the closed state, a metal cavity is formed between the metal layers of adjacent housings. In the closed state, when the foldable electronic device communicates through the antenna arranged near the metal cavity, the metal cavity will also resonate due to coupling, thereby interfering with the operation of the antenna, resulting in poor radiation characteristics of the antenna. SUMMARY

[0005] The present application provides an electronic device, which includes a first housing and a second housing that are foldably arranged, and an antenna. The antenna uses the conductive part of the frame of the housing as a radiator. In the closed state, the electronic device has good radiation characteristics.

[0006] In a first aspect, an electronic device is provided, comprising: a floor; a first housing and a second housing configured to be folded relative to each other to a closed state of the electronic device; the first housing comprises a first bezel, and the second housing comprises a second bezel, wherein the first bezel comprises a first edge and a second edge intersecting at an angle, the first edge comprises a first position, and the second edge comprises a second position, the first bezel has a first insulating gap and a second insulating gap at the first position and the second position, respectively; a first metal layer and a second metal layer, the first bezel surrounds an outer periphery of the first metal layer, and the second bezel surrounds an outer periphery of the second metal layer, the first metal layer and the second metal layer are opposite to each other and do not contact each other based on the electronic device being in the closed state; an antenna, the antenna comprises: a radiator, the radiator comprises a conductive part of the first bezel between the first position and the second position, at least part of the radiator is arranged to be spaced apart from the floor; a feed circuit, the radiator comprises a feed point, and the feed circuit is coupled to the feed point; a ground, the radiator comprises a ground point, and the ground is coupled between the ground point and the floor; wherein, based on the electronic device being in the closed state, the radiator, the ground, and the feed circuit are configured to generate a first resonance and a second resonance, a resonance point frequency of the first resonance is less than a resonance point frequency of the second resonance, and a resonance frequency band of the second resonance comprises a first frequency band; based on the electronic device being in an unfolded state, the radiator, the ground, and the feed circuit are configured to generate a third resonance, and a resonance frequency band of the third resonance comprises the first frequency band.

[0007] According to the embodiments of the present application, when the electronic device is in the closed state, the first end and the second end of the radiator are open ends. The first resonance can be generated by the line CM mode described in the above embodiments. The second resonance can be generated by the line DM mode described in the above embodiments. When the electronic device is in the closed state, the cavity generates a resonance similar to the line CM mode in the vicinity of the radiator due to the coupling of the antenna.

[0008] When the electronic device is in the closed state, the antenna generates a first electric field in the first region by the line DM mode, and the cavity formed between the first metal layer and the second metal layer generates a second electric field in the first region by the line CM mode, the first electric field and the second electric field are orthogonal, and the first region comprises the radiator. In an embodiment, the first region can be understood as a region with a minimum distance of less than 10 mm, or within 5 mm, from the radiator.

[0009] Since the first electric field and the second electric field are orthogonal, the cavity has less energy coupled by the antenna, and correspondingly, the strength of the generated resonance is weaker, and the cavity has less influence on the radiation characteristics of the antenna.

[0010] Therefore, when the electronic device is in the closed state, the second resonance of the antenna generated by the line DM mode has less influence on the radiation in the first frequency band, and the antenna has good radiation characteristics in the first frequency band.

[0011] Meanwhile, since the electronic device is in the unfolded state, the cavity does not exist, and the antenna can resonate by other modes to make the antenna have better radiation characteristics in the first frequency band. For example, the third resonance can be generated by the line CM mode in the unfolded state, and the antenna has better radiation efficiency in the first frequency band.

[0012] With reference to the first aspect, in some implementations of the first aspect, a length L1 of the radiator on the first side and a length L2 of the radiator on the second side satisfy: 0.2×L1≤L2≤5×L1.

[0013] According to embodiments of the present application, when the length L1 of the radiator on the first side and the length L2 of the radiator on the second side satisfy the above ratio, the electronic device is in the closed state, the antenna resonates less energy coupled to the cavity, and the cavity has less influence on the radiation characteristics of the antenna in the first frequency band.

[0014] With reference to the first aspect, in some implementations of the first aspect, a length L3 of the radiator between the ground point and the first position and a length L0 of the radiator satisfy: 0.25×L0≤L3≤0.75×L0.

[0015] According to embodiments of the present application, the ground point can be used to make the radiator resonate by the line CM mode. The position of the ground point can also be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna.

[0016] With reference to the first aspect, in some implementations of the first aspect, a length L4 of the radiator between the feed point and the first position and a length L0 of the radiator satisfy: 0.25×L0≤L4≤0.75×L0.

[0017] According to embodiments of the present application, the position of the feed point can be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna.

[0018] With reference to the first aspect, in some implementations of the first aspect, a length L5 of the radiator between the ground point and the feed point and a length L0 of the radiator satisfy: L5≤0.25×L0.

[0019] According to embodiments of the present application, the distance between the ground point and the feed point can be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna.

[0020] In some embodiments of the first aspect, the antenna further includes a first tuning circuit and a second tuning circuit; the radiator further includes a first connection point and a second connection point, the first connection point is between the first position and the ground point, the second connection point is between the second position and the ground point, the first tuning circuit is coupled with the first connection point, and the second tuning circuit is coupled with the second connection point.

[0021] According to embodiments of the present application, the first tuning circuit and the second tuning circuit can be used to adjust the radiation characteristics (e.g., resonant point frequency) of the antenna.

[0022] In some embodiments of the first aspect, a length of the radiator between the first connection point and the first position is less than or equal to 10 mm, and / or a length of the radiator between the second connection point and the second position is less than or equal to 10 mm.

[0023] According to embodiments of the present application, the first connection point and / or the second connection point can be disposed close to the open end of the radiator. The open end of the radiator has a stronger electric field, and the first tuning circuit and / or the second tuning circuit can have a larger adjustment range.

[0024] In some embodiments of the first aspect, based on the electronic device being in the unfolded state, the first tuning circuit and the second tuning circuit are in an open circuit state; based on the electronic device being in the unfolded state, the first tuning circuit is in a short circuit state and the second tuning circuit is in an open circuit state.

[0025] According to embodiments of the present application, when the first connection point and the second connection point are close to the open end of the radiator, the first tuning circuit is in a conductive (short circuit) state. The first tuning circuit can make the first connection point and the ground plane be in a conductive (short circuit) state, and the second tuning circuit can make the second connection point and the ground plane be in an open circuit (disconnected) state. The first end of the radiator is a grounded end, and the second end is an open end. When the electronic device is in the unfolded state, the feed point is between the first position and the ground point, the first end of the radiator is a grounded end, and the second end is an open end. When the feed point feeds an electrical signal, there is also a certain intensity of current on the radiator between the first position and the ground point. The current on the radiator reverses on both sides of the ground point, having characteristics similar to a line CM mode. When the electronic device is in the unfolded state, since the whole stub (the conductor part between the first position and the second position) of the radiator has a strong current, the whole stub participates in radiation, and the antenna has a larger radiation aperture, and the antenna has better radiation characteristics (e.g., radiation efficiency) in the first frequency band.

[0026] With reference to the first aspect, in some implementations of the first aspect, based on that the electronic device is in the unfolded state, an equivalent resistance value of the first tuning circuit is 0 ohm, or an equivalent inductance value of the first tuning circuit is less than or equal to 10 nH.

[0027] According to embodiments of the present application, when the equivalent resistance value or the equivalent inductance value of the first tuning circuit and / or the equivalent resistance value or the equivalent inductance value of the second tuning circuit is within the above range, it can be considered that the first tuning circuit and / or the second tuning circuit is in a conduction (short circuit) state. The first tuning circuit can make the first connection point and the ground plane in a conduction (short circuit) state. The second tuning circuit can make the second connection point and the ground plane in a conduction (short circuit) state. The first end and / or the second end of the radiator is a ground end.

[0028] With reference to the first aspect, in some implementations of the first aspect, the feed point is located between the first position and the ground point; based on that the electronic device is in the unfolded state, the radiator between the ground point and the first position or the second position, the first tuning circuit, the ground member and the feed circuit are used to generate the third resonance.

[0029] With reference to the first aspect, in some implementations of the first aspect, a width of the ground member connected with the first bezel is greater than or equal to 1 mm and less than or equal to 20 mm.

[0030] With reference to the first aspect, in some implementations of the first aspect, a length of the first side is less than or equal to a length of the second side.

[0031] In a second aspect, an electronic device is provided, comprising: a floor; a first housing and a second housing configured to be folded relative to each other to a closed state of the electronic device; the first housing comprises a first bezel, and the second housing comprises a second bezel, wherein the first bezel comprises a first edge and a second edge intersecting at an angle, the first edge comprises a first position, and the second edge comprises a second position, the first bezel has a first insulating gap and a second insulating gap at the first position and the second position, respectively; a first metal layer and a second metal layer, the first bezel surrounds an outer periphery of the first metal layer, and the second bezel surrounds an outer periphery of the second metal layer, the first metal layer and the second metal layer are opposite to each other and do not contact each other based on the electronic device being in the closed state; an antenna, the antenna comprises: a radiator, the radiator comprises a conductive part of the first bezel between the first position and the second position, at least part of the radiator is arranged to be spaced apart from the floor; a feed circuit, the radiator comprises a feed point, and the feed circuit is coupled to the feed point; a first tuning circuit, the radiator further comprises a first connection point, and the first tuning circuit is coupled to the first connection point; wherein, based on the electronic device being in the closed state, the first tuning circuit is in an open state, the radiator and the feed circuit are configured to generate a first resonance, and a resonance frequency band of the first resonance comprises a first frequency band; based on the electronic device being in an unfolded state, the first tuning circuit is in a short-circuit state, the radiator, the first tuning circuit, and the feed circuit are configured to generate a second resonance, and a resonance frequency band of the second resonance comprises the first frequency band.

[0032] According to the embodiments of the present application, when the electronic device is in the closed state, the first tuning circuit is in an open (disconnected) state, and the first end and the second end of the radiator are open ends. The first resonance is generated by the line DM mode described in the above embodiments. When the electronic device is in the closed state, the cavity generates a resonance in the vicinity of the radiator by antenna coupling, which is generated by a line CM mode.

[0033] When the electronic device is in the closed state, the antenna generates a first electric field in the first region by the line DM mode, and the cavity formed between the first metal layer and the second metal layer generates a second electric field in the first region by the line CM mode, the first electric field and the second electric field are orthogonal, and the first region comprises the radiator. In an embodiment, the first region can be understood as a region with a minimum distance of less than 10 mm, or within 5 mm, from the radiator.

[0034] Since the first electric field and the second electric field are orthogonal, the cavity coupled to the antenna has less energy, and correspondingly, the strength of the generated resonance is weak, and the cavity has less influence on the radiation characteristics of the antenna.

[0035] Therefore, when the electronic device is in the closed state, the second resonance of the antenna generated by the line DM mode has little influence on the radiation in the first frequency band, and the antenna has good radiation characteristics in the first frequency band.

[0036] Meanwhile, since the electronic device is in the unfolded state, the cavity does not exist, and the antenna can resonate by the whole branch (the conductor part between the first position and the second position), and the whole branch participates in radiation, the antenna has a larger radiation aperture, and the antenna has better radiation characteristics (for example, radiation efficiency) in the first frequency band.

[0037] With reference to the second aspect, in some implementations of the second aspect, a length L1 of the radiator on the first side and a length L2 of the radiator on the second side satisfy: 0.2 x L1≤L2≤5 x L1.

[0038] With reference to the second aspect, in some implementations of the second aspect, a length L4 of the radiator between the feed point and the first position and a length L0 of the radiator satisfy: 0.25 x L0≤L4≤0.75 x L0.

[0039] With reference to the second aspect, in some implementations of the second aspect, the antenna further includes a second tuning circuit; the radiator further includes a second connection point, a length of the radiator between the second connection point and the second position is less than or equal to 10 mm, and the second tuning circuit is coupled to the second connection point.

[0040] With reference to the second aspect, in some implementations of the second aspect, based on the electronic device being in the unfolded state, an equivalent resistance value of the first tuning circuit is 0 ohm, or an equivalent inductance value of the first tuning circuit is less than or equal to 10 nH.

[0041] With reference to the second aspect, in some implementations of the second aspect, a length of the first side is less than or equal to a length of the second side.

[0042] In a third aspect, an electronic device is provided, comprising: a floor; a first housing and a second housing configured to be folded relative to each other to a closed state of the electronic device; the first housing comprises a first bezel, and the second housing comprises a second bezel, the first bezel comprises a first position and a second position, the first bezel has an insulating gap in the first position or is coupled to the floor, and the first bezel has an insulating gap in the second position or is coupled to the floor; a first metal layer and a second metal layer, the first bezel surrounds an outer periphery of the first metal layer, and the second bezel surrounds an outer periphery of the second metal layer, the first metal layer and the second metal layer are opposite and do not contact each other based on the electronic device being in the closed state; an antenna, the antenna comprises: a radiator, the radiator comprises a conductive part of the first bezel between the first position and the second position, at least part of the radiator is disposed spaced apart from the floor; a feed circuit, the radiator comprises a feed point, and the feed circuit is coupled to the feed point; wherein, based on the electronic device being in the closed state, the radiator generates a first resonance by a half-wavelength mode, and a resonance frequency band of the first resonance comprises a first frequency band; based on the electronic device being in an unfolded state, the radiator generates a second resonance by a quarter-wavelength mode, and a resonance frequency band of the second resonance comprises the first frequency band.

[0043] According to the embodiments of the present application, when the electronic device is in the closed state, the antenna generates resonance by the half-wavelength mode. As in the above embodiments, the antenna can generate resonance by the line CM mode or the line DM mode, so that the cavity coupled to the antenna has less energy, and correspondingly, the strength of the generated resonance is weaker, and the cavity has less influence on the radiation characteristics of the antenna.

[0044] Therefore, when the electronic device is in the closed state, the first resonance generated by the antenna by the half-wavelength mode has less influence on the radiation in the first frequency band, and the antenna has good radiation characteristics in the first frequency band.

[0045] At the same time, since the electronic device is in the unfolded state, the cavity does not exist, the antenna can generate resonance by other modes (for example, the quarter-wavelength mode), and all stubs participate in radiation, the antenna has a larger radiation aperture, and the antenna has better radiation characteristics (for example, radiation efficiency) in the first frequency band.

[0046] In combination with the third aspect, in some implementations of the third aspect, the first bezel has a first insulating gap and a second insulating gap in the first position and the second position, respectively; and the radiator comprises a ground point coupled to the floor.

[0047] With reference to the third aspect, in some implementations of the third aspect, the antenna further includes a first tuning circuit; the radiator further includes a first connection point, a length of the radiator between the first connection point and the first position is less than or equal to 10 mm, and the first tuning circuit is coupled with the first connection point.

[0048] With reference to the third aspect, in some implementations of the third aspect, the antenna further includes a second tuning circuit; the radiator further includes a second connection point, a length of the radiator between the second connection point and the second position is less than or equal to 10 mm, and the second tuning circuit is coupled with the second connection point. BRIEF DESCRIPTION OF DRAWINGS

[0049] FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0050] FIG. 2 is a schematic structural diagram of a foldable electronic device 100 according to an embodiment of the present application.

[0051] FIG. 3 is a schematic structural diagram of the foldable electronic device 100 in an unfolded state.

[0052] FIG. 4 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0053] FIG. 5 is a schematic structural diagram of the foldable electronic device 100 in a possible closed state.

[0054] FIG. 6 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0055] FIG. 7 is a schematic diagram of a structure of a common mode of an antenna and a corresponding distribution of current and electric field.

[0056] FIG. 8 is a schematic diagram of a structure of a differential mode of another antenna and a corresponding distribution of current and electric field.

[0057] FIG. 9 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0058] FIG. 10 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0059] FIG. 11 is a simulation result of a radiation efficiency and a system efficiency of the antenna 101 of the electronic device 100 shown in FIG. 10 in a closed state.

[0060] FIG. 12 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0061] FIG. 13 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0062] FIG. 14 is a bottom view of an electronic device 100 according to an embodiment of the present application.

[0063] FIG. 15 is a view of an electronic device 100 according to an embodiment of the present application.

[0064] FIG. 16 is a simulation result of S parameters of an antenna 200 of the electronic device 100 of FIG. 15 in a closed state.

[0065] FIG. 17 is a simulation result of radiation efficiency and system efficiency of the antenna 200 of the electronic device 100 of FIG. 15 in the closed state.

[0066] FIG. 18 is a simulation view of current of the antenna 200 of the electronic device 100 of FIG. 15 in the closed state at 0.9 GHz in case 1.

[0067] FIG. 19 is a simulation view of current of the antenna 200 of the electronic device 100 of FIG. 15 in the closed state at 0.9 GHz in case 2.

[0068] FIG. 20 is a simulation view of current and magnetic current of the first metal layer of the electronic device 100 of FIG. 15 in the closed state at 0.9 GHz in case 1.

[0069] FIG. 21 is a simulation view of current and magnetic current of the first metal layer of the electronic device 100 of FIG. 15 in the closed state at 0.9 GHz in case 2.

[0070] FIG. 22 is a simulation result of S parameters of the antenna 200 of the electronic device 100 of FIG. 15 in the closed state.

[0071] FIG. 23 is a simulation result of radiation efficiency and system efficiency of the antenna 200 of the electronic device 100 of FIG. 15 in the closed state.

[0072] FIG. 24 is a view of an electronic device 100 according to an embodiment of the present application.

[0073] FIG. 25 is a view of an electronic device 100 according to an embodiment of the present application.

[0074] FIG. 26 is a view of an electronic device 100 according to an embodiment of the present application.

[0075] FIG. 27 is a view of an electronic device 100 according to an embodiment of the present application. DETAILED DESCRIPTION

[0076] Hereinafter, terms that can occur in embodiments of the present application are explained.

[0077] It should be understood that the term "and / or" as used herein merely describes the association relationship of the same field of associated objects, that is, A and / or B can represent three cases, that is, A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0078] "Within the scope of" used in the present application includes both ends of the range by default, unless otherwise indicated, for example, within the range of 1 to 5, including both 1 and 5.

[0079] Coupling: can be understood as direct coupling and / or indirect coupling, "coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be referred to as "electrical connection", which means that the components are in physical contact and electrically conductive; It can also be understood as a form of connection between different components in the circuit structure through the entity circuit of the copper foil or wire of the printed circuit board (PCB) that can transmit electrical signals; "Indirect coupling" can be understood as electrical conduction between two conductors through space / non-contact. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, through the coupling between the gap between the two conductive parts to form an equivalent capacitor to realize signal transmission.

[0080] Element / device: includes at least one of lumped elements / devices and distributed elements / devices.

[0081] Lumped element / device: refers to a general term for all elements when the element size is much smaller than the relative wavelength of the circuit operating frequency. For a signal, at any time, the element characteristics remain fixed and are independent of the frequency.

[0082] Distributed element / device: Unlike lumped elements, if the element size is similar to or larger than the relative wavelength of the circuit operating frequency, when the signal passes through the element, the characteristics of each point of the element itself will be different due to the change of the signal, and at this time the element as a whole cannot be regarded as a single body with fixed characteristics, but should be called a distributed element.

[0083] Capacitance: can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to a component that exhibits capacitance, such as a capacitor element; Distributed capacitance (or distributed capacitance) refers to the equivalent capacitance formed by spacing a certain gap between two conductive parts.

[0084] Inductance: can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to a component that exhibits inductance, such as an inductor element; Distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a certain length of conductive part.

[0085] Radiating element: is a device in an antenna for receiving / transmitting electromagnetic wave radiation. In some cases, "antenna" is understood in a narrow sense as a radiating element, which changes guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiating element via a feed line, which is converted into some polarized electromagnetic wave energy by the radiating element, and radiated in a desired direction. The receiving radiating element converts some polarized electromagnetic wave energy from a certain direction in space into modulated high-frequency current energy, which is delivered to the input of the receiver via a feed line.

[0086] The radiating element can include a conductor with a certain shape and size, such as a wire, or a patch, etc., which is not limited in the specific shape. In an embodiment, the wire-shaped radiating element can be referred to as a wire antenna. In an embodiment, the wire-shaped radiating element can be implemented by a conductive frame, which can also be referred to as a frame antenna. In an embodiment, the wire-shaped radiating element can be implemented by a bracket conductor, which can also be referred to as a bracket antenna. In an embodiment, the wire diameter (e.g., including thickness and width) of the wire-shaped radiating element, or the radiating element of the wire antenna, is much smaller (e.g., less than 1 / 16 of the wavelength) than the wavelength (e.g., the medium wavelength), and the length can be comparable to the wavelength (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of wire antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, inverted F antennas (also referred to as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feed from the feed end of the radiating branch. For example, the inverted F antenna (Inverted-F Antenna, IFA) can be regarded as being obtained by adding a ground path to a monopole antenna. The IFA antenna has a feed point and a ground point, and is called an inverted F antenna because its side view is in the shape of an inverted F. In an embodiment, the patch-shaped radiating element can include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also referred to as PIFA, Planar Inverted F Antenna). In an embodiment, the patch-shaped radiating element can be implemented by a planar conductor (e.g., a conductive patch or a conductive coating, etc.). In an embodiment, the patch-shaped radiating element can include a conductive patch, such as a copper patch, etc. In an embodiment, the patch-shaped radiating element can include a conductive coating, such as silver paste, etc. The shape of the patch-shaped radiating element includes a circle, a rectangle, a ring, etc., which is not limited in the specific shape. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiating element, and a ground plate, wherein the dielectric substrate is arranged between the radiating element and the ground plate.

[0087] The radiators can also include slots or gaps formed on the conductors, such as closed or semi-closed slots or gaps on the grounded conductor plane. In one embodiment, the slotted or gapped radiators can be referred to as slot antennas or gap antennas. In one embodiment, the slots or gaps of the slot / gap antennas have a radial dimension (e.g., including width) much smaller than the wavelength (e.g., dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and a length dimension comparable to the wavelength (e.g., dielectric wavelength) (e.g., around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiators with closed slots or gaps can be referred to as closed slot antennas. In one embodiment, the radiators with semi-closed slots or gaps (e.g., with openings added to the closed slots or gaps) can be referred to as open slot antennas. In some embodiments, the gap shape is long and thin. In some embodiments, the length of the gap is about half a wavelength (e.g., dielectric wavelength). In some embodiments, the length of the gap is about an integer number of wavelengths (e.g., one dielectric wavelength). In some embodiments, the gap can be fed by a transmission line that is connected across one or both sides of the gap, whereby the gap is excited with a radio frequency electromagnetic field and radiates electromagnetic waves into space. In one embodiment, the radiators of the slot or gap antennas can be implemented by conductive bezels that are grounded at both ends, which can also be referred to as bezel antennas; in this embodiment, the slot or gap antennas can be considered to include linear radiators that are spaced apart from the ground plane and grounded at both ends, thereby forming closed or semi-closed slots or gaps. In one embodiment, the radiators of the slot or gap antennas can be implemented by bracket conductors that are grounded at both ends, which can also be referred to as bracket antennas.

[0088] The feed circuit is a combination of all circuits for reception and transmission of radio frequency signals. The feed circuit can include a transceiver and a radio frequency front end circuit. In some cases, the term "feed circuit" is used in a narrow sense to refer to a radio frequency integrated circuit (RFIC), which can be considered to include a radio frequency front end chip and a transceiver. The feed circuit has the function of converting radio waves (e.g., radio frequency signals) and electrical signals (e.g., digital signals). In general, it is considered to be part of the radio frequency.

[0089] In some embodiments, the electronic device can also include a test seat (or referred to as a radio frequency seat or a radio frequency test seat). The test seat can be used to insert a coaxial cable to test the characteristics of the radio frequency front end circuit or the radiators of the antenna through the cable. The radio frequency front end circuit can be considered to be a circuit portion coupled between the test seat and the transceiver.

[0090] In some embodiments, the radio frequency front-end circuit can be integrated as a radio frequency front-end chip in the electronic device, or the radio frequency front-end circuit and the transceiver can be integrated as a radio frequency chip in the electronic device.

[0091] It should be understood that any two of the first / second / … / Nth feeding circuits in the present application can share the same transceiver, for example, through one radio frequency channel in one transceiver (for example, one port (pin) of a radio frequency chip transmits signals; and can also share one radio frequency front-end circuit, for example, through a tuning circuit or an amplifier in one radio frequency front-end to process signals.

[0092] It should also be understood that two of the first / second / … / Nth feeding circuits in the present application generally correspond to two radio frequency test seats in the electronic device.

[0093] The matching circuit is a circuit for adjusting the radiation characteristics of the antenna. In one embodiment, the matching circuit is coupled between the feeding circuit and the corresponding radiator. In one embodiment, the matching circuit is coupled between the test seat and the radiator. Generally, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In one embodiment, the matching circuit can include tuning circuits and / or elements, and the tuning circuit can be an element for switching the coupling connection of the radiator. The matching circuit has the functions of impedance matching and / or frequency tuning. Generally, it is considered to be part of the antenna.

[0094] The ground structure / feeding structure can include connectors, such as metal springs, and the radiator is coupled to the ground plane through the ground structure / the feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure can include a transmission line / feeding line, and the ground structure can include a ground line.

[0095] End / point: the "end / point" of the first end / second end / feed end / ground end / feed point / ground point / connection point of the antenna radiator, which cannot be understood as the end point or end part that is physically disconnected from other radiators in a narrow sense, but can also be considered as a certain point or a certain section on the continuous radiator. In an embodiment, the "end / point" can include a connection / coupling area on the antenna radiator that is coupled to other conductive structures, for example, the feed end / feed point can be a coupling area (for example, an area that faces a part of the feed circuit) on the antenna radiator that is coupled to a feed structure or a feed circuit, and for another example, the ground end / ground point can be a connection / coupling area on the antenna radiator that is coupled to a ground structure or a ground circuit. Open end / closed end: in some embodiments, the open end and the closed end are, for example, relative to whether the ground, the closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, relative to other conductive bodies, the closed end is electrically connected to other conductive bodies, and the open end is not electrically connected to other conductive bodies. In an embodiment, the open end can also be referred to as a suspended end, a free end, an open end, or an open circuit end. In an embodiment, the closed end can also be referred to as a grounded end or a short circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled to the open end to transfer coupled energy (which can be understood as transferring current).

[0096] In some embodiments, the understanding of the "closed end" can also be from the perspective of the current distribution, and the closed end or the grounded end, etc. can be understood as a current large point on the radiator, or a small point of the electric field on the radiator; in an embodiment, coupling electronic devices (such as capacitors, inductors, etc.) at the closed end can not change the current distribution characteristics of the current large point / small point of the electric field; in an embodiment, opening a slit (for example, a gap filled with insulating material) at or near the closed end can not change the current distribution characteristics of the current large point / small point of the electric field.

[0097] In some embodiments, the understanding of the "open end" can also be from the perspective of the current distribution, and the open end or the suspended end, etc. can be understood as a current small point on the radiator, or a large point of the electric field on the radiator; in an embodiment, coupling electronic devices (such as capacitors, inductors, etc.) at the open end can not change the current distribution characteristics of the current small point / large point of the electric field.

[0098] It should be understood that coupling electronic devices (such as capacitors, inductors, etc.) at the radiator end at a gap (similar to the radiator at the opening of the open end or the suspended end from the structure of the radiator) can make the radiator end a current large point / small point of the electric field, and in this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0099] The "suspended radiator" mentioned in the embodiments of the present application refers to a radiator that is not directly connected to a feeding line / branch and / or a grounding line / branch, but is fed and / or grounded through indirect coupling.

[0100] It should be understood that the "suspended" in the "suspended end" and the "suspended radiator" does not mean that there is no structure around the radiator to support it. In an embodiment, the suspended radiator may, for example, be a radiator arranged on the inner surface of an insulating back cover.

[0101] The current co-directional / counter-directional mentioned in the embodiments of the present application should be understood as the direction of the main current on the same side of the conductor being co-directional / counter-directional. For example, when co-directional distributed currents are excited on the conductors in a bent shape or a ring shape (for example, the current path is also bent or ring-shaped), it should be understood that, for example, the main currents excited on the conductors on both sides of a ring-shaped conductor (for example, the conductors around a gap, on both sides of the gap) are counter-directional in terms of direction, but still belong to the definition of co-directional distributed currents in the embodiments of the present application. In an embodiment, the co-directional currents on a conductor can mean that there is no reversal point of the current on the conductor. In an embodiment, the counter-directional currents on a conductor can mean that there is at least one reversal point of the current on the conductor. In an embodiment, the co-directional currents on two conductors can mean that there is no reversal point of the current on the two conductors, and the currents flow in the same direction. In an embodiment, the counter-directional currents on two conductors can mean that there is no reversal point of the current on the two conductors, and the currents flow in opposite directions. The co-directional / counter-directional currents on multiple conductors can be understood accordingly.

[0102] Resonance / resonance frequency: resonance frequency is also called resonance frequency. The resonance frequency can have a frequency range, that is, a resonance frequency range. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -20 dB. It should be understood that, unless otherwise specified, the "first / second... resonance" mentioned in the present application refers to the fundamental mode resonance generated by the antenna / radiator, or in other words, the resonance with the lowest frequency generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to the specific design, and each antenna mode can correspond to a fundamental mode resonance.

[0103] Resonance frequency band: the range of resonance frequencies is the resonance frequency band, and the return loss characteristic of any frequency point in the resonance frequency band can be less than -6 dB or -5 dB.

[0104] Communication band / operating band: Regardless of the type of antenna, it always works within a certain frequency range (bandwidth). For example, an antenna supporting B40 band has an operating band including frequencies within the range of 2300MHz-2400MHz, or in other words, the operating band of the antenna includes the B40 band. The frequency range that meets the index requirements can be regarded as the operating band of the antenna.

[0105] The resonant frequency band and the operating frequency band can be the same or can partially overlap. In one embodiment, one or more resonant frequency bands of an antenna can cover one or more operating frequency bands of the antenna.

[0106] Electrical length: can refer to the ratio of the physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave, which can satisfy the following formula:

[0107] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0108] Wavelength: or operating wavelength, can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink band (resonant frequency of 1920MHz-1980MHz) is 1955MHz, the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non-center frequency of the resonant frequency or the operating frequency band.

[0109] It should be understood that the wavelength of the radiation signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3x10 8 m / s. The wavelength of the radiation signal in a medium can be calculated as follows: medium Where ε is the relative permittivity of the medium. The wavelength in the embodiments of the present application generally refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink band (resonant frequency of 1920MHz-1980MHz) is 1955MHz, the wavelength can be the medium wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to a non-center frequency of the resonant frequency or the operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative permittivity of the medium filled on one side or more sides of the radiator.

[0110] Total efficiency of antenna system: refers to the ratio of input power to output power at the port of the antenna.

[0111] Radiation efficiency of antenna: refers to the ratio of the power radiated by the antenna to space (i.e. the power of the part effectively converted into electromagnetic waves) to the active power input to the antenna. The active power input to the antenna = input power of the antenna - loss power; the loss power mainly includes the return loss power and the ohmic loss power of the metal and / or the dielectric loss power. The radiation efficiency is a value for measuring the radiation capability of the antenna, and the metal loss and the dielectric loss are both factors affecting the radiation efficiency.

[0112] As can be understood by those skilled in the art, efficiency is generally expressed in percentage, and there is a corresponding conversion relationship between efficiency and dB. The closer the efficiency is to 0dB, the better the efficiency of the antenna is.

[0113] Antenna return loss: can be understood as the ratio of the signal power reflected back to the antenna port to the antenna port transmission power through the antenna circuit. The smaller the reflected signal, the greater the signal radiated by the antenna to space, and the greater the radiation efficiency of the antenna. The greater the reflected signal, the smaller the signal radiated by the antenna to space, and the smaller the radiation efficiency of the antenna.

[0114] The antenna return loss can be represented by the S11 parameter, which belongs to the S parameters. S11 represents the reflection coefficient, and this parameter can represent the pros and cons of the antenna transmission efficiency. The S11 parameter is usually negative, and the smaller the S11 parameter, the smaller the antenna return loss, and the smaller the energy reflected back by the antenna itself, which means that the actual energy entering the antenna is more, and the system efficiency of the antenna is higher; the larger the S11 parameter, the larger the antenna return loss, and the lower the system efficiency of the antenna.

[0115] It should be noted that in engineering, -6dB is generally used as the standard for S11 value. When the S11 value of the antenna is less than -6dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is better.

[0116] Ground (GND): can refer to at least one part of any ground layer, or ground plate, or ground metal layer, etc. in an electronic device (such as a mobile phone), or at least one part of any combination of the above ground layer, or ground plate, or ground component, etc. Ground can be used for the grounding of components in an electronic device. In an embodiment, ground can be a ground layer of a circuit board of an electronic device, or a ground plate formed by a middle frame of an electronic device, or a ground metal layer formed by a metal film under a screen of an electronic device. In an embodiment, the circuit board can be a printed circuit board (PCB), for example, an 8-layer, 10-layer, or 12-14 layer board with 8, 10, 12, 13, or 14 layers of conductive material, or elements separated and electrically insulated by a dielectric layer or an insulating layer such as glass fiber, polymer, etc. In an embodiment, the circuit board includes a dielectric substrate, a ground layer, and a wiring layer, and the wiring layer and the ground layer are electrically connected by a via. In an embodiment, components such as a display, a touch screen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to the circuit board; or electrically connected to the wiring layer and / or the ground layer in the circuit board. For example, a radio frequency source is arranged on the wiring layer.

[0117] Any ground layer, or ground plate, or ground metal layer described above is made of conductive material. In an embodiment, the conductive material can be any one of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate, and tin-plated copper, graphite powder impregnated cloth, graphite coated substrate, copper plated substrate, brass plated substrate, and aluminum plated substrate. Those skilled in the art can understand that the ground layer / ground plate / ground metal layer can also be made of other conductive materials.

[0118] Grounding: refers to coupling with the above ground / ground plate in any way. In an embodiment, grounding can be physical grounding, for example, physical grounding (or called physical ground) at a specific position on the frame through a part of the frame structure. In an embodiment, grounding can be device grounding, for example, device grounding (or called device ground) through capacitors, inductors, resistors, etc. in series or parallel.

[0119] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0120] As shown in FIG. 1, the electronic device 100 can include a cover 13, a display module 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, the cover 13 can be a cover glass, and can also be replaced by a cover of other materials, such as a PET (Polyethylene terephthalate) material cover, etc.

[0121] The cover 13 can be arranged close to the display module 15, and can be mainly used for protecting and dustproofing the display module 15.

[0122] In an embodiment, the display module 15 can include a liquid crystal display (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and the embodiments of the present application do not limit this.

[0123] The middle frame 19 mainly plays a supporting role for the whole machine. In FIG. 1, the PCB 17 is arranged between the middle frame 19 and the rear cover 21, and it should be understood that in an embodiment, the PCB 17 can also be arranged between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. The printed circuit board PCB 17 can use a flame-retardant material (FR-4) dielectric board, a Rogers dielectric board, a hybrid dielectric board of Rogers and FR-4, etc. Here, FR-4 is a code of a flame-retardant material grade, and the Rogers dielectric board is a high-frequency board. The PCB 17 carries elements such as a radio frequency chip. In an embodiment, a metal layer can be arranged on the printed circuit board PCB 17. The metal layer can be used for grounding of the elements carried on the printed circuit board PCB 17, and can also be used for grounding of other elements such as a bracket antenna and a frame antenna, and the metal layer can be referred to as a ground plate, or a grounding plate, or a grounding layer. In an embodiment, the metal layer can be formed by etching metal on the surface of any one of the dielectric boards in the PCB 17. In an embodiment, the metal layer for grounding can be arranged on one side of the printed circuit board PCB 17 close to the middle frame 19. In an embodiment, the edge of the printed circuit board PCB 17 can be regarded as the edge of its grounding layer. In an embodiment, the metal middle frame 19 can also be used for grounding of the above-mentioned elements. The electronic device 100 can also have other ground plates / grounding plates / grounding layers, and the foregoing will not be repeated here.

[0124] Due to the compactness inside the electronic device, a floor / ground plane (e.g., printed circuit board, middle frame, screen metal layer, battery, etc. can be considered as part of the floor) is usually arranged in the internal space of 0-2mm from the inner surface of the frame. In an embodiment, the filling medium between the frame and the floor can be simply profiled with the inner surface of the filling medium, and the length and width of the rectangle formed by the surrounding can be considered as the length and width of the floor; or all the conductive parts inside the frame can be superimposed to form a profile, and the length and width of the rectangle formed by the surrounding can be considered as the length and width of the floor.

[0125] The electronic device 100 can further include a battery (not shown in the figure). The battery can be arranged between the middle frame 19 and the back cover 21, or can be arranged between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery can be arranged between the main board and the sub-board, wherein the main board can be arranged between the upper edge of the middle frame 19 and the battery, and the sub-board can be arranged between the lower edge of the middle frame 19 and the battery.

[0126] The electronic device 100 can further include a frame 11, which can include a conductive material such as metal. The frame 11 can be arranged between the display module 15 and the back cover 21 and extend circumferentially around the periphery of the electronic device 100. The frame 11 can have four side edges surrounding the display module 15, helping to fix the display module 15.

[0127] In an implementation manner, the frame 11 mainly including a conductive material can be referred to as a conductive frame or a metal frame of the electronic device 100, which is suitable for an industrial design (ID) of a metal appearance. In an implementation manner, the outer surface of the frame 11 is mainly a conductive material, such as a metal material, so as to form an appearance of a metal frame. In these implementation manners, the conductive part including the outer surface in the frame 11 can be used as an antenna radiator of the electronic device 100, and is usually referred to as a frame antenna.

[0128] In another implementation, the outer surface of the bezel 11 is mainly a non-conductive material, such as plastic, forming a non-metallic appearance of the bezel, suitable for a non-metallic ID. In one implementation, the inner surface of the bezel 11 can include a conductive material, such as a metallic material. In this implementation, the conductive portion of the inner surface of the bezel 11 can be used as an antenna radiator of the electronic device 100. It should be understood that the radiator provided on the inner surface of the bezel 11 (or the conductive material of the inner surface) can be provided against the non-conductive material of the bezel 11 to minimize the volume occupied by the radiator and be closer to the outside of the electronic device 100 to achieve better signal transmission effect, and can also be referred to as a bezel antenna. It should be noted that the radiator provided against the non-conductive material of the bezel 11 means that the radiator can be provided against the inner surface of the non-conductive material, or can be embedded in the non-conductive material, or can be provided close to the inner surface of the non-conductive material, for example, the radiator and the inner surface of the non-conductive material can have a small gap therebetween. It should be understood that the conductive material and the non-conductive material can be regarded as part of the bezel 11.

[0129] It should be understood that the bezel 11 can have insulating gaps, and the conductive portions of the bezel between the insulating gaps and / or between the insulating gaps and the grounding point can be used as radiators to form a bezel antenna (it should be understood that the radiators of the bezel antenna can also include the grounding point and the conductive portions of the bezel between the grounding points). When the bezel 11 is formed of a conductive material such as metal, the insulating gap can be understood as a gap in the bezel 11 filled with a non-metallic material (insulating material), in which case the gap is visible on the appearance surface. When the outer surface of the bezel 11 is a non-conductive material, the insulating gap can be understood as the end portion of the inner surface of the bezel 11 (for example, the end portion not electrically connected to other radiators or conductors), or as the gap between the radiators of the inner surface of the bezel 11, which can be filled with a non-metallic material (insulating material), or can not be filled with a non-metallic material, for example, filled with air, in which case the gap is not visible on the appearance surface.

[0130] The middle frame 19 can include the bezel 11, and the middle frame 19 including the bezel 11 as a unitary piece can support the electronic devices in the entire machine. The cover plate 13 and the back cover 21 are respectively attached along the upper and lower edges of the bezel to form a housing of the electronic device. In one embodiment, the cover plate 13, the back cover 21, the bezel 11, and / or the middle frame 19 can be collectively referred to as a housing of the electronic device 100. It should be understood that the "housing" can be used to refer to part or all of any one of the cover plate 13, the back cover 21, the bezel 11, or the middle frame 19, or part or all of any combination of the cover plate 13, the back cover 21, the bezel 11, or the middle frame 19.

[0131] The frame 11 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. The portion of the frame 11 serving as the radiator can have a gap with other portions of the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment. In an embodiment, the middle frame 19 can be provided with an aperture at the portion of the frame 11 serving as the radiator, to facilitate the radiation of the antenna.

[0132] Alternatively, the frame 11 can not be considered as a part of the middle frame 19. In an embodiment, the frame 11 can be connected to and integrally formed with the middle frame 19. In another embodiment, the frame 11 can include a protrusion extending inwardly to be connected to the middle frame 19, for example, by means of a spring, a screw, welding, etc. The protrusion of the frame 11 can also be used to receive a feeding signal, so that at least a portion of the frame 11 serves as an antenna radiator to receive / transmit radio frequency signals. The portion of the frame 11 serving as the radiator can have a gap with the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment, and thus the antenna has a good signal transmission function.

[0133] The back cover 21 can be made of a metal material; or can be made of a non-conductive material, such as a glass back cover, a plastic back cover, or other non-metal back cover; or can be made of a back cover including both conductive material and non-conductive material. In an embodiment, the back cover 21 including the conductive material can replace the middle frame 19, and be integrated with the frame 11, to support the electronic devices in the whole machine.

[0134] In an embodiment, the conductive portion of the middle frame 19 and / or the back cover 21 can serve as a reference ground of the electronic device 100, and the frame 11, the PCB 17, etc. of the electronic device can be grounded by electrical connection with the middle frame.

[0135] The antenna of the electronic device 100 can also be disposed in the housing, such as a bracket antenna, a millimeter wave antenna, and the like (not shown in FIG. 1). The clearance of the antenna disposed in the housing can be obtained by a slit / hole on any one of the middle frame, the bezel, the back cover, and the display screen, or a non-conductive gap / aperture formed between any two of them, and the clearance of the antenna can be configured to ensure the radiation characteristics of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive component in the electronic device 100, through which the antenna radiates signals to the external space. In an embodiment, the antenna 40 can be in the form of a flexible printed circuit (FPC) based antenna, a laser-direct-structuring (LDS) based antenna, a microstrip disk antenna (MDA), or the like. In an embodiment, the antenna can also be in the form of a transparent structure embedded in the screen of the electronic device 100, so that the antenna is a transparent antenna unit embedded in the screen of the electronic device 100.

[0136] FIG. 2 is a structural schematic diagram of a foldable electronic device 100 according to an embodiment of the present application. The foldable electronic device 100 can be a mobile phone, a tablet computer, an e-book reader, a notebook computer, a wearable device such as a watch, or the like, which has a folding function. The embodiment shown in FIG. 2 is described by taking a foldable mobile phone as an example.

[0137] It should be understood that only the electronic device 100 including one housing (for example, the above-mentioned middle frame 19) is shown in FIG. 1, and in actual production or design, the electronic device 100 can also include multiple housings to form the foldable electronic device 100.

[0138] Referring to FIG. 2, the foldable electronic device 100 can include a flexible display screen 110 (which can correspond to the display module 15 in FIG. 1), a first bezel 121 (which can correspond to the bezel 11 in FIG. 1), a first cover 122, a second bezel 123 (which can correspond to the bezel 11 in FIG. 1), a second cover 124, and a hinge 125. In some embodiments, the first bezel 121, the first cover 122, the second bezel 123, and the second cover 124 can form a first housing 126 (which can correspond to the middle frame 19 in FIG. 1) and a second housing 127 (which can correspond to the middle frame 19 in FIG. 1) supporting the flexible display screen 110. In other embodiments, at least one of the first cover 122 and the second cover 124 can include a display screen.

[0139] The dot matrix pattern filled in FIG. 2 can schematically represent the flexible display 110. The flexible display 110 can have strong flexibility and bendability, and can provide a new interaction mode based on the bendability for a user.

[0140] The flexible display 110 can include a first display portion 111 corresponding to the first housing 126, a second display portion 112 corresponding to the second housing 127, and a foldable display portion 113 corresponding to the hinge 125. The foldable display portion 113 can be connected between the first display portion 111 and the second display portion 112.

[0141] The first bezel 121 can surround an outer periphery of the first cover 122, and at least a portion of the first bezel 121 can also surround an outer periphery of the first display portion 111. The first display portion 111 can be disposed in parallel with the first cover 122 with a space therebetween, and the first display portion 111 and the first cover 122 can be located on both sides of the first bezel 121. The space between the first display portion 111 and the first cover 122 can be used to dispose devices of the foldable electronic device 100, such as an antenna, a circuit board assembly, or the like.

[0142] The second bezel 123 can surround an outer periphery of the second cover 124, and at least a portion of the second bezel 123 can also surround an outer periphery of the second display portion 112. The second display portion 112 can be disposed in parallel with the second cover 124 with a space therebetween, and the second display portion 112 and the second cover 124 can be located on both sides of the second bezel 123. The space between the second display portion 112 and the second cover 124 can be used to dispose devices of the foldable electronic device 100, such as an antenna, a circuit board assembly, or the like.

[0143] In an embodiment provided in the present application, the cover and the bezel can be two parts of the housing of the foldable electronic device 100, and the cover and the bezel can be connected, and the connection form can not belong to assembly methods such as clamping, sticking, welding, riveting, and clearance fitting. The connection relationship between the cover and the bezel is generally difficult to be divided. In another embodiment provided in the present application, the cover and the bezel can be two different components. By assembling the cover and the bezel together, the housing of the foldable electronic device 100 can be formed.

[0144] The hinge 125 can be connected between the first housing 126 and the second housing 127. Under the action of the hinge 125, the first housing 126 and the second housing 127 can approach or move away from each other. Accordingly, the first display portion 111 of the flexible display 110 and the second display portion 112 of the flexible display 110 can approach or move away from each other, so that the flexible display 110 can be folded or unfolded.

[0145] In one example, the rotating shaft 125 can include a main shaft, a first connecting assembly, and a second connecting assembly. The first connecting assembly can be fixed with the first cover 122, and the second connecting assembly can be fixed with the second cover 124. The first connecting assembly and the second connecting assembly can rotate relative to the main shaft. Through the mutual movement of the first connecting assembly and the second connecting assembly, the mutual movement of the first shell 126 and the second shell 127 can be driven, and the opening and closing function of the foldable electronic device 100 can be realized.

[0146] The foldable electronic device 100 shown in FIG. 2 is currently in a possible unfolded state. In the unfolded state, the angle between the first shell 126 and the second shell 127 can be 180°, or can be referred to as a flat state. The flexible display screen 110 can be in a flat state as shown in FIG. 2.

[0147] In the flat state, the angle between the first display part 111 corresponding to the first shell 126 and the second display part 112 corresponding to the second shell 127 can be 180°. Due to possible errors in engineering implementation, when the angle between the first display part 111 and the second display part 112 is between 170° and 190°, the flexible display screen 110 can be considered to be in a flat state.

[0148] FIG. 3 shows a possible closed state of the foldable electronic device 100. In FIG. 3, the outward closed state of the foldable electronic device 100 is shown (the outward closed state can be referred to as an outward folding state). The outward closed state shown in FIG. 3 can be, for example, a left-right outward closed state or an up-down outward closed state. The possible closed state of the foldable electronic device 100 will be described below with reference to FIGS. 2 and 3.

[0149] In the present embodiment, the closed state of the foldable electronic device 100 can mean that the foldable electronic device 100 is currently bent, and the bending degree of the foldable electronic device 100 reaches the maximum. At this time, the first cover 122 and the second cover 124 can be approximately parallel, spaced apart from each other, and arranged face to face, and the spacing distance between the first cover 122 and the second cover 124 is the smallest. At least part of the first shell 126 and the second shell 127 are accommodated in the space surrounded by the flexible display screen 110; the first display part 111, the first shell 126, the second shell 127, and the second display part 112 are sequentially stacked. Similarly, the first display part 111 and the second display part 112 can be approximately parallel and spaced apart from each other, and the spacing distance between the first cover 122 and the second cover 124 is smaller than the spacing distance between the first display part 111 and the second display part 112. At this time, the first display part 111 and the second display part 112 can be considered to be located on different planes.

[0150] In combination with FIGS. 2 and 3, when the foldable electronic device 100 is in the outer folding state, the first cover 122 and the second cover 124 can be close to each other, and the first display 111 and the second display 112 can be close to each other. The first display 111, the second display 112, and the foldable display 113 can form a housing area for accommodating the first cover 122, the second cover 124, and the hinge 125. That is, the first cover 122, the second cover 124, and the hinge 125 can be accommodated in the interval space between the first display 111 and the second display 112.

[0151] It should be understood that the foldable electronic device 100 can be folded inwardly (the inwardly closed state can be referred to as an inner folding state). When the foldable electronic device 100 is in the inner folding state, the first cover 122 and the second cover 124 can be close to each other, and the first display 111 and the second display 112 can be close to each other. The first cover 122, the second cover 124, and the hinge 125 can form a housing area for accommodating the first display 111, the second display 112, and the foldable display 113. That is, the first display 111, the second display 112, and the foldable display 113 can be accommodated in the interval space between the first cover 122 and the second cover 124.

[0152] The foldable electronic device 100 can be switched between the closed state and the unfolded state. When the foldable electronic device 100 is in the closed state, the foldable electronic device 100 has a relatively small occupied space; when the foldable electronic device 100 is in the unfolded state, the foldable electronic device 100 can display a relatively large screen to increase the viewable range of the user. It should be understood that when the foldable electronic device 100 is switched from the closed state to the unfolded state, the intermediate process can be understood as a hovering state of the foldable electronic device 100, and during the switching process, the occupied space of the foldable electronic device 100 increases, and the screen area increases. In the hovering state, the angle between the first housing 126 and the second housing 127 can be any angle between 0° and 180° (not including 0° and 180°).

[0153] The foldable electronic device 100 can further include a third housing 128 and a hinge 129, as shown in FIG. 4. The hinge 129 can be connected between the third housing 128 and the second housing 127. The third housing 128 and the second housing 127 can be close to or away from each other. With the increase in the number of foldable parts of the foldable electronic device 100, in the case of keeping the same screen size in the unfolded state, the occupied space of the foldable electronic device 100 can be further reduced in the closed state.

[0154] In the foldable electronic device 100 shown in FIG. 4, since there are three foldable parts (the first housing 126, the second housing 127, and the third housing 128), the foldable electronic device 100 has at least three modes: 1, an unfolded state; 2, a closed state; and 3, a partially unfolded state.

[0155] 1. As shown in FIG. 4, it is one possible unfolded state of the foldable electronic device 100. In the unfolded state, the angle between the first housing 126, the second housing 127, and the third housing 128 can be about 180°. The flexible display 110 can be in the unfolded state.

[0156] 2. As shown in FIG. 5, it is one possible closed state (three-fold state) of the foldable electronic device 100. In the closed state, the first housing 126 and the second housing 127 are rotated along the rotation shaft 125, and the second housing 127 and the third housing 128 are rotated along the rotation shaft 129, so that the foldable electronic device 100 reaches the maximum bending degree. At this time, the first housing 126, the second housing 127, and the third housing 128 can be regarded as being located on different planes.

[0157] It should be understood that, for the sake of brevity of discussion, in the structure shown in FIG. 5, the closed state of the foldable electronic device 100 is S-fold (the side of the foldable electronic device 100 is in the shape of S, and the second housing 127 is located between the first housing 126 and the third housing 128). In one embodiment, the closed state of the foldable electronic device 100 can also be G-fold (the side of the foldable electronic device 100 is in the shape of G, and the third housing 128 is located between the first housing 126 and the second housing 127). The embodiments of the present application do not limit the closed state of the foldable electronic device 100.

[0158] 3. As shown in FIG. 6, it is one possible partially unfolded state (two-fold state) of the foldable electronic device 100. In the partially unfolded state, the angle between the first housing 126 and the second housing 127 can be about 180°, and the second housing 127 and the third housing 128 are rotated along the rotation shaft 129, so that the third housing 128 approaches the second housing 127. At this time, the first housing 126 and the second housing 127 are regarded as being located on the same plane, and the second housing 127 and the third housing 128 can be regarded as being located on different planes. In another possible partially unfolded state, the angle between the third housing 128 and the second housing 127 can be about 180°, and the first housing 126 and the second housing 127 are rotated along the rotation shaft 125, so that the first housing 126 approaches the second housing 127.

[0159] FIGS. 1 and 2 only schematically show some components included in the electronic device 10 and the foldable electronic device 100, and the actual shape, the actual size, and the actual structure of these components are not limited by the above-mentioned drawings.

[0160] It should be understood that in the embodiments of the present application, the face where the display screen of the electronic device is located can be considered as the front face, the face where the back cover is located can be considered as the back face, and the face where the frame is located can be considered as the side face.

[0161] It should be understood that in the embodiments of the present application, when a user holds (usually vertically and faces the screen) the electronic device, the orientation of the electronic device has a top, a bottom, a left side and a right side. It should be understood that in the embodiments of the present application, when a user holds (usually vertically and faces the screen) the electronic device, the orientation of the electronic device has a top, a bottom, a left side and a right side.

[0162] Firstly, two antenna modes to be involved in the present application are introduced by FIG. 7 and FIG. 8. Among them, FIG. 7 is a structure of a common mode of an antenna provided by the present application and a corresponding current, electric field distribution schematic diagram. FIG. 8 is a structure of a differential mode of another antenna provided by the present application and a corresponding current, electric field distribution schematic diagram. The two ends of the antenna radiator in FIG. 7 and FIG. 8 are open, and the common mode and the differential mode thereof can be respectively called line common mode and line differential mode.

[0163] It should be understood that the "common mode" or "CM mode" in the present application includes the line common mode and the slot common mode, and the "differential mode" or "DM mode" in the present application includes the line differential mode and the slot differential mode, which can be determined according to the structure of the antenna.

[0164] It should be understood that the "common-differential mode" or "CM-DM mode" in the present application refers to the line common mode and the line differential mode generated on the same radiator, or refers to the slot common mode and the slot differential mode generated on the same radiator, which can be determined according to the structure of the antenna.

[0165] 1. Line (Wire) common mode (CM) mode

[0166] (a) in FIG. 7 shows that the two ends of the radiator of the antenna 40 are open, and the feeding circuit (not shown in the figure) is connected at the middle position 41. In an embodiment, the feeding form of the antenna 40 adopts symmetrical feed. The feeding circuit can be connected to the middle position 41 of the antenna 40 through the feeding line 42. It should be understood that the symmetrical feed can be understood as that one end of the feeding circuit is connected to the radiator, and the other end is coupled with the ground plane to realize grounding, wherein the connection point (feeding point) of the feeding circuit and the radiator is located at the center of the radiator, for example, it can be the midpoint of the geometric structure, or the midpoint (or a region within a certain range near the above-mentioned midpoint) of the electrical length.

[0167] The middle position 41 of the antenna 40 can be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiators. The middle position 41 can be covered by, for example, the connection between the feed line 42 and the antenna 40.

[0168] The current and electric field distribution of the antenna 40 is shown in (b) of FIG. 7. As shown in (b) of FIG. 7, the current presents a reverse distribution, for example, a symmetrical distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. As shown in (b) of FIG. 7, the current at the feed line 42 presents a same direction distribution. Based on the same direction distribution of the current at the feed line 42, the feed shown in (a) of FIG. 7 can be referred to as a line CM feed. Based on the reverse distribution of the current on both sides of the connection between the radiators and the feed line 42, the antenna mode shown in (b) of FIG. 7 can be referred to as a line CM mode (which can also be referred to as a CM mode, for example, for a line antenna, the CM mode refers to the line CM mode). The current and electric field shown in (b) of FIG. 7 can be referred to as the current and electric field of the line CM mode, respectively.

[0169] The current is stronger at the middle position 41 of the antenna 40 (the current is larger near the middle position 41 of the antenna 40), and weaker at both ends of the antenna 40, as shown in (b) of FIG. 7. The electric field is weaker at the middle position 41 of the antenna 40, and stronger at both ends of the antenna 40.

[0170] 2. Line differential mode (DM) mode

[0171] As shown in (a) of FIG. 8, the left and right ends of the two radiators of the antenna 50 are open ends, and the middle position 51 is connected to the feed circuit. In an embodiment, the feed form of the antenna 50 adopts an anti-symmetrical feed. One end of the feed circuit is connected to one of the radiators through the feed line 52, and the other end of the feed circuit is connected to the other radiator through the feed line 52. The middle position 51 can be the geometric center of the antenna 50, or the gap formed between the radiators.

[0172] It should be understood that the "center anti-symmetrical feed" mentioned in the present application can be understood as that the positive and negative poles of the feed unit are connected to the two connection points near the above-mentioned midpoint of the radiators. In an embodiment, the signal amplitudes output by the positive and negative poles of the feed unit are the same, and the phases are opposite, for example, the phases are opposite by 180°±10°.

[0173] Fig. 8 (b) shows the current and electric field distribution of the antenna 50. As shown in Fig. 8 (b), the current presents a same direction distribution, for example, an anti-symmetrical distribution, on both sides of the middle position 51 of the antenna 50; the electric field presents a reverse distribution on both sides of the middle position 51. As shown in Fig. 8 (b), the current at the feeding wire 52 presents a reverse distribution. Based on the reverse distribution of the current at the feeding wire 52, the feeding shown in Fig. 8 (a) can be called a line DM feeding. Based on the same direction distribution of the current on both sides of the connection between the radiator and the feeding wire 52, the antenna mode shown in Fig. 8 (b) can be called a line DM mode (also can be simply called a DM mode, for example, for a line antenna, the DM mode refers to a line DM mode). The current and electric field shown in Fig. 8 (b) can be respectively called the current and electric field of the line DM mode. It can be understood that based on the same direction distribution of the current on both sides of the connection between the radiator and the feeding wire 52, the antenna mode shown in Fig. 8 (b) can also be called a half antenna mode, or a half wavelength mode, or simply a half mode.

[0174] In one embodiment, in the line DM mode, or the half mode, the current is stronger at the middle position 51 of the antenna 50 (the current is larger near the middle position 51 of the antenna 50), and is weaker at both ends of the antenna 50, as shown in Fig. 8 (b). The electric field is weaker at the middle position 51 of the antenna 50, and is stronger at both ends of the line antenna 50.

[0175] It should be understood that for the antenna radiator, which can be understood as a metal structure that generates radiation, the number can be one, as shown in Fig. 7, or can also be two, as shown in Fig. 8, which can be adjusted according to the actual design or production needs. For example, for the line CM mode, two radiators can also be used as shown in Fig. 8, the two ends of the two radiators are oppositely arranged and spaced apart by a gap, and a symmetrical feeding mode is used at the two ends close to each other, for example, the same feeding signal is fed into the two ends close to each other of the two radiators, respectively, and similar effects to the antenna structure shown in Fig. 7 can also be obtained. Correspondingly, for the line DM mode, one radiator can also be used as shown in Fig. 7, two feeding points are arranged at the middle position of the radiator and an anti-symmetrical feeding mode is used, for example, signals with the same amplitude and opposite phase are fed into the two symmetrical feeding points on the radiator, respectively, and similar effects to the antenna structure shown in Fig. 8 can also be obtained.

[0176] 3. Line CM-DM mode

[0177] Figs. 7 and 8 above respectively show that when the two ends of the radiator are open, different feeding modes are used to generate the line CM mode and the line DM mode, respectively.

[0178] When the feeding form of the antenna is asymmetric feeding (the feeding point deviates from the middle position of the radiator, including edge feeding or offset feeding), or the ground point (the coupling point with the ground) of the radiator is asymmetric (the ground point deviates from the middle position of the radiator), the antenna can generate the first resonance and the second resonance at the same time, which correspond to the line CM mode and the line DM mode respectively. For example, the first resonance corresponds to the line CM mode, and the current and electric field distribution is as shown in (b) of FIG. 7. The second resonance corresponds to the line DM mode, and the current and electric field distribution is as shown in (b) of FIG. 8.

[0179] Since the above antenna structures can generate two working modes (the electric field is symmetrically distributed or antisymmetrically distributed) with orthogonal electric fields (the electric field is integrated to zero (integral orthogonal) in the far field), the isolation between the two working modes (the line CM mode and the line DM mode) of the antenna structure is good, and the antenna structure can be applied to a multi-input multi-output (MIMO) antenna system in an electronic device.

[0180] FIG. 9 is a schematic diagram of an electronic device 100 provided in an embodiment of the present application.

[0181] It should be understood that, for the sake of brevity of discussion, only the electronic device 100 is taken as an example of a foldable electronic device, and only the first shell and the second shell are taken as examples for description. The first shell and the second shell can be rotationally connected with the rotation shaft 125.

[0182] As shown in FIG. 9, when the electronic device 100 is in a closed state, the cavity 130 is formed between the first cover 122 and the second cover 124.

[0183] It should be understood that, in the electronic device 100 shown in FIG. 9, only the electronic device 100 in the outer folding state is taken as an example for description. In actual production or design, the electronic device 100 can also be in the inner folding state. In addition, in the above embodiments, only the cavity 130 formed between the first cover 122 and the second cover 124 is taken as an example for description. In actual production or design, the cavity can also be formed by other metal layers located in the first shell and other metal layers located in the second shell (for example, metal layers in the PCB), or, when the electronic device 100 is in the inner folding state, the cavity can be formed by the metal layer in the first display part 111 and the metal layer in the second display part 112, and the embodiments of the present application do not limit this.

[0184] When the cavity 130 is provided with the antenna 101, the cavity 130 can be resonated by the radiator of the antenna 101 in the process of resonating the antenna 101. For example, the antenna 101 uses the conductor part of the first frame 121 (or the second frame 123) as the radiator, as shown in FIG. 10. When the resonance of the cavity 130 is close to the resonance of the antenna, the radiation characteristics of the antenna can be greatly affected (for example, the radiation efficiency is dented).

[0185] As shown in FIG. 11, when the electronic device is in the closed state, compared with the electronic device not including the above-mentioned cavity (for example, the first cover 122 and the second cover 124 shown in FIG. 9 are filled with metal), the antenna has dents in the radiation efficiency near 0.6 GHz, near 0.85 GHz, and near 1.3 GHz, which makes the radiation characteristics of the antenna decrease near the above-mentioned frequency points.

[0186] The electronic device provided in the embodiments of the present application includes a first shell and a second shell which are foldably arranged, and an antenna. The antenna uses the conductive part of the frame of the shell as a radiator. The electronic device has good radiation characteristics when in the closed state.

[0187] FIG. 12 is a schematic diagram of an electronic device 100 provided in the embodiments of the present application.

[0188] It should be understood that the electronic device 100 described in the embodiments of the present application is only a schematic diagram, and only the structure of the region related to the embodiments of the present application is shown. In actual production or design, other regions can be adjusted. For example, the frame (for example, the first frame or the second frame) can have multiple insulating gaps or be coupled to the ground plate at multiple points to form the radiator or parasitic branch of other antennas, which is not limited in the embodiments of the present application.

[0189] As shown in FIG. 12, the electronic device 100 can include a first shell 201 and a second shell 202 and a ground plate 300.

[0190] The first shell 201 includes a first frame 210, and at least part of the first frame 210 is arranged to be spaced apart from the ground plate 300. The second shell 202 includes a second frame 220, and at least part of the second frame 220 is arranged to be spaced apart from the ground plate 300.

[0191] The first shell 201 and the second shell 202 are used to be folded relative to each other to the closed state of the electronic device 100.

[0192] In an embodiment, the electronic device 100 further includes a hinge 203. The hinge 203 is located between the first housing 201 and the second housing 202, and the hinge 203 is rotatably connected with the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In an embodiment, the floor 300 can include a first part and a second part, the first part can be located in the first housing 201, and the second part can be located in the second housing 202, and the first part and the second part can be connected by the hinge 203.

[0193] It should be understood that, for the sake of brevity of discussion, in the electronic device 100 shown in FIG. 12, the electronic device 100 is a foldable electronic device, and the hinge 203 is directly connected with the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In addition, in actual production or design, "the hinge 203 is rotatably connected with the first housing 201 and the second housing 202 respectively" includes the case that the hinge 203 can be rotatably connected with the first housing or the second housing through one or more second hinges and one or more intermediate housings. For example, in an embodiment, the electronic device 100 can further include a first hinge and a second hinge, and one or more intermediate housings located between the first hinge and the second hinge. The first hinge is located between the first housing 201 and the intermediate housing, and the first hinge is rotatably connected with the first housing 201 and the intermediate housing respectively, so that the first housing 201 and the intermediate housing can rotate relative to each other. The second hinge is located between the intermediate housing and the second housing 202, and the first hinge is rotatably connected with the intermediate housing and the second housing 202 respectively, so that the intermediate housing and the second housing 202 can rotate relative to each other. For example, the electronic device 100 further includes a third housing and a second hinge, the third housing is located between the first housing and the second housing, the second hinge is located between the third housing and the first housing, the second hinge is located between the third housing and the second housing, and the first hinge is rotatably connected with the third housing and the first housing respectively, and the second hinge is rotatably connected with the third housing and the second housing respectively. In an embodiment, the first hinge is directly connected with the first housing 201 and the second housing 202 respectively, and one side of the first housing 201 or one side of the second housing 202 is further rotatably connected with at least one housing. For example, the electronic device 100 further includes a third housing and a second hinge, the second housing is located between the first housing and the third housing, the second hinge is located between the third housing and the second housing, and the second hinge is rotatably connected with the third housing and the second housing respectively. For the sake of brevity of discussion, the solutions described in the embodiments of the present application can be understood accordingly, and will not be described one by one.

[0194] The first frame 210 includes a first position 211 and a second position 212. The first frame 210 has a first insulating gap and a second insulating gap at the first position 211 and the second position 212 respectively.

[0195] The first border 210 includes a first side 241 and a second side 242 that are angularly intersected. The first position 211 is located on the first side 241, and the second position 212 is located on the second side 242.

[0196] In an embodiment, the length of the first side 241 is less than the length of the second side 242.

[0197] It should be understood that the first side 241 can be a top side or a bottom side of the electronic device 100. For the sake of brevity of the discussion, only the case in which the first side 241 is the bottom side of the electronic device 100 is described. The top side / bottom side of the electronic device 100 can be understood as the top / bottom side in a normal use state, for example, the top / bottom side in a desktop user interface (GUI) in a mobile phone.

[0198] When the electronic device 100 is a foldable electronic device including multiple housings, the first side 241 can be understood as a short side in a closed state or a short side in a flat state. For example, in a large folding type (which can be understood as a folding state in which a desktop user interface can still be displayed), the first side 241 can be understood as a short side in a closed state of the electronic device 100. For another example, in a small folding type (which can be understood as a flat state in which a desktop user interface can be displayed), the first side 241 can be understood as a short side in a flat state of the electronic device 100. The first side 241 can be understood accordingly in the embodiments of the present application, and for the sake of brevity of the discussion, will not be described again.

[0199] The electronic device 100 further includes an antenna 200. The antenna 200 includes a radiator 230 and a feed circuit 240.

[0200] The radiator 230 includes a conductive portion of the first border 210 between the first position 211 and the second position 212. At least a portion of the radiator 230 is spaced apart from the floor 300.

[0201] The radiator 230 includes a grounding point 221 that is coupled to the floor 300.

[0202] In an embodiment, the antenna 200 further includes a grounding member 223. The grounding member 223 is coupled between the grounding point 221 and the floor 300, and the radiator 230 can be grounded through the grounding member 223 at the grounding point 221. One end of the grounding member 223 is coupled to the grounding point 221, and the other end is coupled to the floor 300. In an embodiment, the width of the grounding member 223 connected to the first border 210 is greater than or equal to 1 mm and less than or equal to 20 mm.

[0203] It should be understood that the grounding point, and / or the connecting point, and / or the grounding area, etc. described in the embodiments of the present application can be realized by a metal spring or a connecting rib structure between the middle plate of the middle frame. When a metal spring or the like is used, the distance between the grounding point, and / or the connecting point, etc. and other points or ends on the radiator can be understood as the distance from the center of the metal spring. When the connecting rib structure between the middle plate of the middle frame is used, the distance between the grounding point, and / or the connecting point, etc. and other points or ends on the radiator can be understood as the distance from the edge of one end of the connecting rib structure.

[0204] For the sake of brevity of discussion, in the embodiments of the present application, only the case that the antenna 200 includes one grounding member is taken as an example for description, and in actual production or design, the antenna 200 can also include multiple grounding members, which is not limited by the embodiments of the present application. The width of the connection between the above-mentioned grounding member (for example, the first side frame 210) and the side frame can be understood as the distance between the two grounding members that are farthest apart in the multiple grounding members, or can also be understood as the sum of the widths of the connections between the multiple grounding members and the side frame, etc.

[0205] The radiator 230 includes a feeding point 222. A feeding circuit 240 is coupled with the feeding point 222 to feed in a first frequency band electric signal (radio frequency signal). In one embodiment, the feeding point 222 is located between the grounding point 221 and the first position 211.

[0206] The electronic device 100 further includes a first metal layer 301 and a second metal layer 302, as shown in FIG. 13. The first side frame 210 surrounds the outer periphery of the first metal layer 301. The second side frame 220 surrounds the outer periphery of the second metal layer 302.

[0207] When the electronic device 100 is in the closed state, the first metal layer 301 and the second metal layer 302 are opposite and do not contact each other, as shown in FIG. 14. In one embodiment, a cavity 303 is formed between the first metal layer 301 and the second metal layer 302. In one embodiment, the first metal layer 301 and the second metal layer 302 can be connected with the hinge shaft 203 respectively.

[0208] It should be understood that in an embodiment, the first metal layer 301 and the second metal layer 302 can be a cover corresponding to the first shell 201 and a cover corresponding to the second shell 202 respectively. In an embodiment, the first metal layer 301 and the second metal layer 302 can be a metal layer in a first display part of a display screen corresponding to the first shell 201 and a metal layer in a second display part of a display screen corresponding to the second shell 202 respectively. In an embodiment, the first metal layer 301 and the second metal layer 302 can be a cover corresponding to the first shell 201 and a metal layer in the second display part of the display screen corresponding to the second shell 202 respectively. In an embodiment, the first metal layer 301 and the second metal layer 302 can be a metal layer in a PCB arranged in the first shell 201 and a metal layer in the second display part of the display screen corresponding to the second shell 202 respectively. The first metal layer 301 and the second metal layer 302 can be any opposite metal layers in the electronic device 100, and the embodiments of the present application do not limit this. For the sake of brevity, the details are not repeated here.

[0209] When the electronic device 100 is in the closed state, the radiator 230 and the feed circuit 240 are used to generate a first resonance and a second resonance, a resonance point frequency of the first resonance is less than a resonance point frequency of the second resonance, and a resonance frequency band of the second resonance includes the first frequency band.

[0210] When the electronic device 100 is in the unfolded state, the radiator 230 and the feed circuit 240 are used to generate a third resonance, and a resonance frequency band of the third resonance includes the first frequency band.

[0211] According to the embodiments of the present application, when the electronic device 100 is in the closed state, the first end and the second end of the radiator 230 are open ends. The first resonance can be generated by the line CM mode described in the above embodiments. The second resonance can be generated by the line DM mode described in the above embodiments. When the electronic device 100 is in the closed state, the cavity 303 generates a resonance similar to the line CM mode in the vicinity of the radiator 230 coupled by the antenna 200.

[0212] When the electronic device 100 is in the closed state, the antenna 200 generates a first electric field by the line DM mode in the first region, the cavity 303 formed between the first metal layer 301 and the second metal layer 302 generates a second electric field by the line CM mode in the first region, the first electric field and the second electric field are orthogonal, and the first region includes the radiator 230. In an embodiment, the first region can be understood as a region with a minimum distance of less than 10 mm, or within 5 mm, from the radiator 230.

[0213] Since the first electric field and the second electric field are orthogonal, the cavity 303 coupled by the antenna 200 has less energy, and correspondingly, the strength of the generated resonance is weak, and the cavity 303 has less influence on the radiation characteristics of the antenna 200.

[0214] Therefore, when the electronic device 100 is in the closed state, the second resonance of the antenna 200 generated by the line DM mode has less influence on the radiation in the first frequency band, and the antenna 200 has good radiation characteristics in the first frequency band.

[0215] Meanwhile, since the electronic device 100 is in the unfolded state, the cavity 303 does not exist, and the antenna 200 can resonate by other modes to make the antenna 200 have better radiation characteristics in the first frequency band. For example, the third resonance can be generated by the line CM mode in the unfolded state, and the antenna 200 has better radiation efficiency in the first frequency band.

[0216] In an embodiment, the length L1 of the radiator 230 on the first side 241 satisfies: 0.2×L0≤L1≤0.8×L0.

[0217] It should be understood that the length L1 of the radiator 230 on the first side 241 can be understood as the size of the radiator 230 in the extension direction (for example, the y direction) of the first side 241. For the sake of brevity of the discussion, the length on the side described in the embodiments of the present application can be understood accordingly, and will not be repeated.

[0218] In an embodiment, the length L1 of the radiator 230 on the first side 241 satisfies: 0.25×L0≤L1≤0.75×L0.

[0219] In an embodiment, the length L1 of the radiator 230 on the first side 241 satisfies: 0.2×L1≤L2≤5×L1.

[0220] In an embodiment, the length L1 of the radiator 230 on the first side 241 satisfies: 0.33×L1≤L2≤3×L1.

[0221] In an embodiment, the length L1 of the radiator 230 on the first side 241 satisfies: 0.5×L1≤L2≤2×L1.

[0222] It should be understood that when the length L1 of the radiator 230 on the first side 241 and the length L2 of the radiator 230 on the second side 242 are in the above proportions, the electronic device 100 is in the closed state, the antenna 200 generates less resonant coupling to the energy of the cavity 303, and the cavity 303 has less influence on the radiation characteristics of the antenna 200 in the first frequency band.

[0223] In one embodiment, a length L3 of the radiator 230 between the ground point 221 and the first location 211 satisfies: 0.25 x L0≤ L3≤ 0.75 x L0, where L0 is a length of the radiator 230.

[0224] In one embodiment, a length L3' of the radiator 230 between the ground point 221 and the second location 212 satisfies: 0.25 x L0≤ L3'≤ 0.75 x L0, where L0 is a length of the radiator 230.

[0225] It is to be understood that the ground point 221 can be used to cause the radiator 230 to generate a first resonance from the CM mode. The location of the ground point 221 can also be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna 200.

[0226] In one embodiment, a length L4 of the radiator 230 between the feed point 222 and the first location 211 satisfies: 0.25 x L0≤ L4≤ 0.75 x L0, where L0 is a length of the radiator 230.

[0227] In one embodiment, a length L4' of the radiator 230 between the feed point 222 and the second location 212 satisfies: 0.25 x L0≤ L4'≤ 0.75 x L0, where L0 is a length of the radiator 230.

[0228] It is to be understood that the location of the feed point 222 can be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna 200.

[0229] In one embodiment, a length L5 of the radiator between the ground point 221 and the feed point 222 satisfies: L5≤ 0.25 x L0, where L0 is a length of the radiator.

[0230] In one embodiment, a distance between the ground point 221 and the feed point 222 is less than or equal to 20 mm.

[0231] It is to be understood that the distance between the ground point 221 and the feed point 222 can be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna 200.

[0232] In one embodiment, the antenna 200 further includes a first tuning circuit 251 and a second tuning circuit 252. The radiator 230 further includes a first connection point 231 and a second connection point 232. The first connection point 231 is located between the first location 211 and the ground point 221, and the second connection point 232 is located between the second location 212 and the ground point 221. The first tuning circuit 251 is coupled with the first connection point 231. The second tuning circuit 252 is coupled with the second connection point 232.

[0233] It should be appreciated that the first tuning circuit 251 and the second tuning circuit 252 can be used to adjust the radiation characteristics (e.g., resonant point frequency) of the antenna 200.

[0234] In one embodiment, the length of the radiator 230 between the first connection point 231 and the first position 211 is less than or equal to 10 mm. In one embodiment, the length of the radiator 230 between the second connection point 232 and the second position 212 is less than or equal to 10 mm.

[0235] In one embodiment, the length of the radiator 230 between the first connection point 231 and the first position 211 is less than or equal to 5 mm. In one embodiment, the length of the radiator 230 between the second connection point 232 and the second position 212 is less than or equal to 5 mm.

[0236] It should be appreciated that the first connection point 231 and / or the second connection point 232 can be disposed close to the open end of the radiator 230. The open end of the radiator 230 has a stronger electric field, and the first tuning circuit 251 and / or the second tuning circuit 252 can have a larger adjustment range.

[0237] In one embodiment, when the electronic device 100 is in the closed state, the first tuning circuit 251, the second tuning circuit 252, the radiator 230 and the feed circuit 240 are used to generate the first resonance and the second resonance. Among them, the first tuning circuit 251 and the second tuning circuit 252 can be used to adjust the radiation characteristics of the antenna 200 at the first resonance and the second resonance, for example, the resonant point frequency, the frequency difference between the resonant point of the first resonance and the resonant point of the second resonance.

[0238] In one embodiment, when the electronic device 100 is in the unfolded state, the first tuning circuit 251, the second tuning circuit 252 are disposed close to the first end and the second end of the radiator 230, and the first tuning circuit 251, the second tuning circuit 252 can be used to make the first end and the second end of the radiator 230 open ends. In one embodiment, when the electronic device 100 is in the unfolded state, the radiator 230 and the feed circuit 240 are used to generate the third resonance and the fourth resonance in the above-mentioned embodiments, and the resonant point frequency of the third resonance is less than the resonant point frequency of the fourth resonance. The third resonance can be generated by the line CM mode described in the above-mentioned embodiments. The fourth resonance can be generated by the line DM mode described in the above-mentioned embodiments. The first tuning circuit 251, the second tuning circuit 252 can be used to adjust the radiation characteristics (e.g., resonant point frequency) of the antenna 200 at the third resonance and the fourth resonance.

[0239] It should be understood that when the first connection point 231 and the second connection point 232 are close to the open ends of the radiator 230, the first tuning circuit 251 and the second tuning circuit 252 can make the first connection point 231 and the ground plane 300, and the second connection point 232 and the ground plane 300 be in an open (disconnected) state. The first end and the second end of the radiator 230 are open ends. When the electronic device 100 is in the unfolded state, the antenna 200 can work in the line CM mode in the first frequency band, and has better radiation characteristics (for example, radiation efficiency).

[0240] In an embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to a capacitor. In an embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductor, and the equivalent inductance value is greater than or equal to 30nH.

[0241] It should be understood that when the equivalent capacitance value or the equivalent inductance value of the first tuning circuit 251 and / or the equivalent capacitance value or the equivalent inductance value of the second tuning circuit 252 is in the above range, the first tuning circuit 251 and / or the second tuning circuit 252 is in an open (disconnected) state. The first tuning circuit 251 and / or the second tuning circuit 252 can make the first connection point 231 and the ground plane 300, and the second connection point 232 and the ground plane 300 be in an open (disconnected) state. The first end and / or the second end of the radiator 230 are open ends.

[0242] In an embodiment, when the electronic device 100 is in the unfolded state, the first tuning circuit 251 and / or the second tuning circuit 252 is close to the first end and the second end of the radiator 230. The first tuning circuit 251 can be used to make the first end of the radiator 230 be a ground end, and the second tuning circuit 252 can be used to make the second end of the radiator 230 be an open end. In an embodiment, when the electronic device 100 is in the unfolded state, the first tuning circuit 251, the radiator 230 (the radiator 230 between the ground point 221 and the first position or between the ground point 221 and the second position) and the feed circuit 240 are used to generate a third resonance in the above-mentioned embodiments. The third resonance can be generated by a line CM mode similar to that described in the above-mentioned embodiments. The second tuning circuit 252 can be used to adjust the radiation characteristics (for example, resonance point frequency) of the antenna 200 at the third resonance.

[0243] It should be understood that when the first connection point 231 and the second connection point 232 are close to the open end of the radiator 230, the first tuning circuit 251 is in a conductive (short circuit) state. The first tuning circuit 251 can make the first connection point 231 and the ground plate 300 in a conductive (short circuit) state, the second tuning circuit 252 can make the second connection point 232 and the ground plate 300 in an open circuit (disconnected) state, and the first end of the radiator 230 is the ground end and the second end is the open end. When the electronic device 100 is in the unfolded state, the feed point 222 is located between the first position 211 and the ground point 221, the first end of the radiator 230 is the ground end and the second end is the open end, and the feed point 222 feeds the electrical signal, the radiator 230 between the first position 211 and the ground point 221 also has a certain intensity of current, and the current on the radiator 230 reverses on both sides of the ground point 221, which has similar characteristics of the line CM mode. When the electronic device 100 is in the unfolded state, since the whole pruning section (the conductor section between the first position 211 and the second position 212) of the radiator 230 has a strong current, the whole pruning section participates in radiation, the radiation aperture of the antenna 200 is larger, and the antenna 200 has better radiation characteristics (for example, radiation efficiency) in the first frequency band.

[0244] In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to a 0 ohm resistor. In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductor, and the equivalent inductance value is less than or equal to 10 nH. In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductor, and the equivalent inductance value is less than or equal to 5.6 nH.

[0245] It should be understood that when the equivalent resistance value or the equivalent inductance value of the first tuning circuit 251 and / or the equivalent resistance value or the equivalent inductance value of the second tuning circuit 252 is within the above range, it can be considered that the first tuning circuit 251 and / or the second tuning circuit 252 is in a conductive (short circuit) state. The first tuning circuit 251 can make the first connection point 231 and the ground plate 300 in a conductive (short circuit) state. The second tuning circuit 252 can make the second connection point 232 and the ground plate 300 in a conductive (short circuit) state. The first end and / or the second end of the radiator 230 is the ground end.

[0246] In the embodiments of the present application, only the first tuning circuit is in the conductive state (short circuit), the second tuning circuit is in the open circuit state (disconnection), the first connection point 231 and the ground plate 300 are in the conductive state (short circuit), and the second connection point 232 and the ground plate 300 are in the open circuit state (disconnection). In actual production or design, the first connection point 231 and the ground plate 300 can be in the open circuit state (disconnection), and the second connection point 232 and the ground plate 300 can be in the conductive state (short circuit). The embodiments of the present application do not limit this. For the sake of brevity of the discussion, no further elaboration is given.

[0247] In one embodiment, the first frequency band includes a communication frequency band in a low band (LB) (698-960 MHz) range in a cellular network.

[0248] In one embodiment, the first frequency band can also include a communication frequency band in a middle band (MB) (1710-2170 MHz) range in a cellular network. In one embodiment, the first frequency band includes a communication frequency band in a high band (HB) (2300-2690 MHz) range in a cellular network, a communication frequency band in a sub 6G range.

[0249] It should be understood that in the embodiments of the present application, the communication frequency band in the range can be understood as any one communication frequency band in the frequency range. For the sake of brevity of the discussion, no further elaboration is given. For example, when the first frequency band is a communication frequency band in the (698-960 MHz) range, the operating frequency band of the antenna 200 can include multiple communication frequency bands belonging to the frequency range, for example, B5, B8, etc. In the embodiments of the present application, they can be understood accordingly, and no further elaboration is given. In one embodiment, the antenna 200 can also include a tuning circuit. The tuning circuit is coupled with the radiator 230 and is used to adjust the resonance point frequency of the resonance generated by the radiator 230, so that the resonance frequency band is different communication frequency bands in the above first frequency band.

[0250] It should be understood that the first frequency band can be determined according to actual production or design, and the embodiments of the present application do not limit this. For example, the first frequency band can also be at least part of the communication frequency band in the sub 6G range. For the sake of brevity of the discussion, no further elaboration is given.

[0251] FIGS. 16 and 17 are simulation results of the antenna 200 when the electronic device 100 shown in FIG. 15 is in a closed state. FIG. 16 is a simulation result of the S parameter of the antenna 200 when the electronic device 100 shown in FIG. 15 is in a closed state. FIG. 17 is a simulation result of the radiation efficiency and system efficiency of the antenna 200 when the electronic device 100 shown in FIG. 15 is in a closed state.

[0252] It should be understood that in the simulation results shown in FIG. 16 and FIG. 17, only the case that at least part of the communication frequency band in the LB (698MHz-960MHz) range in the cellular network is included in the first frequency band is taken as an example for illustration. Also, in the simulation results shown in FIG. 16 and FIG. 17, the simulation results of the antenna 200 in case 1 and case 2 are shown.

[0253] As shown in FIG. 16, in case 1 (the technical solution provided in the embodiments of the present application), the antenna 200 resonates near 0.3GHz and near 0.9GHz. The resonance near 0.3GHz can be generated by the line CM mode in the above-mentioned embodiments, corresponding to the first resonance in the above-mentioned embodiments. The resonance near 0.9GHz can be generated by the line DM mode in the above-mentioned embodiments, corresponding to the second resonance in the above-mentioned embodiments.

[0254] In case 2 (the comparative solution), the antenna 200 resonates near 0.9GHz and near 1.5GHz. The resonance near 0.9GHz can be generated by the line CM mode in the above-mentioned embodiments, corresponding to the first resonance in the above-mentioned embodiments. The resonance near 1.5GHz can be generated by the line DM mode in the above-mentioned embodiments, corresponding to the second resonance in the above-mentioned embodiments.

[0255] In case 1, the resonance frequency band of the second resonance (the line DM mode) includes the first frequency band. In case 2, the resonance frequency band of the first resonance (the line CM mode) includes the first frequency band.

[0256] It should be understood that the resonance point frequency of the first resonance and the resonance point frequency of the second resonance can be adjusted by the first tuning circuit and the second tuning circuit, so that the resonance frequency band of the first resonance or the resonance frequency band of the second resonance includes the first frequency band.

[0257] As shown in FIG. 17, in the first frequency band (698MHz-960MHz), compared with the antenna in case 1, the radiation efficiency and the system efficiency of the antenna in case 2 decrease by about 1dB due to the stronger energy of the cavity coupling.

[0258] Figures 18-21 are simulation results of the antenna 200 of the electronic device 100 in the closed state shown in Figure 15. In Figure 18, the current simulation of the antenna 200 of the electronic device 100 in the closed state shown in Figure 15 at 0.9 GHz in Case 1 is shown. In Figure 19, the current simulation of the antenna 200 of the electronic device 100 in the closed state shown in Figure 15 at 0.9 GHz in Case 2 is shown. In Figure 20, the current and magnetic current simulation of the first metal layer of the electronic device 100 in the closed state shown in Figure 15 at 0.9 GHz in Case 1 is shown. In Figure 21, the current and magnetic current simulation of the first metal layer of the electronic device 100 in the closed state shown in Figure 15 at 0.9 GHz in Case 2 is shown.

[0259] As shown in Figure 18, in Case 1 (the technical solution provided in the embodiments of the present application), the currents on the radiator 230 are in the same direction, corresponding to the current generated by the line DM mode.

[0260] As shown in Figure 19, in Case 2 (the comparative solution), the currents on the radiator 230 are in opposite directions on both sides of the grounding point 221, corresponding to the current generated by the line CM mode.

[0261] As shown in Figures 20 and 21, in the case where the radiator 230 resonates by the line DM mode (Case 1) and the line CM mode (Case 2), the cavity formed by the first metal layer and the second metal layer can be excited to resonate.

[0262] Because part of the radiator 230 is located on the first side and part of the radiator 230 is located on the second side, the current and the corresponding mode of the electric field in the cavity (for example, the first metal layer) in the area around the radiator 230 is similar to the line CM mode. Because the electric field generated by the line CM mode is orthogonal to the electric field generated by the line DM mode, when the radiator 230 resonates by the line DM mode (Case 1), the cavity (for example, the first metal layer) coupled to the energy is small, and the resonance generated is weak. For example, the magnetic current intensity on the first metal layer shown in Figure 20 is smaller than the magnetic current intensity on the first metal layer shown in Figure 21 (the intensity of the dark area in Figures 20 and 21 is strong, for example, the magnetic current intensity of the orange area is strong). Therefore, when the radiator 230 resonates by the line DM mode, the antenna has better radiation characteristics (for example, radiation efficiency).

[0263] Figures 22 and 23 are simulation results of the antenna 200 of the electronic device 100 in the closed state shown in Figure 15. In Figure 22, the S parameter simulation results of the antenna 200 of the electronic device 100 in the closed state shown in Figure 15 are shown. In Figure 23, the radiation efficiency and system efficiency simulation results of the antenna 200 of the electronic device 100 in the closed state shown in Figure 15 are shown.

[0264] It should be understood that in the simulation results shown in FIG. 16 and FIG. 17, the first frequency band includes at least part of the communication frequency band in the LB (698MHz-960MHz) range of the cellular network as an example. In the simulation results shown in FIG. 22 and FIG. 23, the first frequency band includes at least part of the communication frequency band in the HB (2300MHz-2690MHz) range of the cellular network as an example.

[0265] As shown in FIG. 22, in case 1 (the technical solution provided in the embodiments of the present application), the antenna 200 resonates near 2.5GHz. The resonance near 2.5GHz can be generated by the line DM mode in the above-mentioned embodiments, corresponding to the second resonance in the above-mentioned embodiments. The resonance point frequency of the resonance generated by the line CM mode in the above-mentioned embodiments (the first resonance in the above-mentioned embodiments) is lower than 1GHz, which is not shown in the figure.

[0266] In case 2 (the comparative solution), the antenna 200 resonates near 2.5GHz and near 3.2GHz. 2.5GHz can be generated by the line CM mode in the above-mentioned embodiments, corresponding to the first resonance in the above-mentioned embodiments. The resonance near 3.2GHz can be generated by the line DM mode in the above-mentioned embodiments, corresponding to the second resonance in the above-mentioned embodiments.

[0267] In case 1, the resonance frequency band of the second resonance (line DM mode) includes the first frequency band. In case 2, the resonance frequency band of the first resonance (line CM mode) includes the first frequency band.

[0268] It should be understood that the resonance point frequency of the first resonance and the resonance point frequency of the second resonance can be adjusted by the first tuning circuit and the second tuning circuit, so that the resonance frequency band of the first resonance or the resonance frequency band of the second resonance includes the first frequency band.

[0269] As shown in FIG. 23, in the first frequency band (2300MHz-2690MHz), compared with the antenna in case 1, the radiation efficiency and system efficiency of the antenna in case 2 decrease by about 3dB due to the stronger energy coupling of the cavity.

[0270] FIG. 24 is a schematic diagram of an electronic device 100 provided in an embodiment of the present application.

[0271] As shown in FIG. 24 and FIG. 25, the electronic device 100 can include a first housing 201 and a second housing 202 and a floor 300.

[0272] The first housing 201 includes a first bezel 210, and at least part of the first bezel 210 is spaced apart from the floor 300. The second housing 202 includes a second bezel 220, and at least part of the second bezel 220 is spaced apart from the floor 300.

[0273] The first housing 201 and the second housing 202 are configured to be relatively folded to a closed state of the electronic device 100.

[0274] In an embodiment, the electronic device 100 further includes a hinge 203. The hinge 203 is located between the first housing 201 and the second housing 202, and the hinge 203 is rotatably connected to the first housing 201 and the second housing 202, respectively, such that the first housing 201 and the second housing 202 are rotatable relative to each other. In an embodiment, the floor 300 can include a first portion and a second portion, the first portion can be located in the first housing 201, and the second portion can be located in the second housing 202, and the first portion and the second portion can be connected by the hinge 203.

[0275] The first bezel 210 includes a first position 211 and a second position 212. The first bezel 210 has a first insulating gap and a second insulating gap at the first position 211 and the second position 212, respectively.

[0276] The first bezel 210 includes a first edge 241 and a second edge 242 that are angularly intersected. The first position 211 is located at the first edge 241, and the second position 212 is located at the second edge 242.

[0277] In an embodiment, the length of the first edge 241 is less than the length of the second edge 242.

[0278] The electronic device 100 further includes a first metal layer 301 and a second metal layer 302. The first bezel 210 surrounds an outer periphery of the first metal layer 301. The second bezel 220 surrounds an outer periphery of the second metal layer 302.

[0279] When the electronic device 100 is in the closed state, the first metal layer 301 and the second metal layer 302 are opposite to each other and do not contact each other. In an embodiment, a cavity is formed between the first metal layer 301 and the second metal layer 302. In an embodiment, the first metal layer 301 and the second metal layer 302 can be connected to the hinge 203, respectively.

[0280] The electronic device 100 further includes an antenna 200. The antenna 200 includes a radiator 230, a feed circuit 240, and a first tuning circuit 251.

[0281] The radiator 230 includes a conductive portion of the first bezel 210 between the first position 211 and the second position 212. At least a portion of the radiator 230 is spaced apart from the floor 300, as shown in FIG. 25.

[0282] The radiator 230 includes a feed point 222. The feed circuit 240 is coupled to the feed point 222 to feed an electrical signal (radio frequency signal) of a first frequency band.

[0283] The radiator 230 also includes a first connection point 231. The first tuning circuit 251 is coupled with the first connection point 231. In one embodiment, a length of the radiator 230 between the first connection point 231 and the first location 211 is less than or equal to 10 mm. In one embodiment, a length of the radiator 230 between the first connection point 231 and the first location 211 is less than or equal to 5 mm.

[0284] When the electronic device 100 is in the closed state, the first tuning circuit 251 is in an open (disconnected) state, the radiator 230 and the feed circuit 240 are used to generate a first resonance, a resonance frequency band of the first resonance includes the first frequency band. In one embodiment, when the electronic device 100 is in the closed state, the first tuning circuit 251 can be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna 200 at the first frequency band.

[0285] It should be understood that when the first tuning circuit 251 is in the open (disconnected) state, the first connection point 231 is open (disconnected) with the ground plane 300, the first end and the second end of the radiator 230 are open ends, the first resonance can be generated by the line DM mode described in the above embodiments.

[0286] Meanwhile, when the first tuning circuit 251 is in the open (disconnected) state, the first tuning circuit 251 can be used to adjust the radiation characteristics (e.g., resonance point frequency) of the antenna 200.

[0287] When the electronic device 100 is in the open state, the first tuning circuit 251 is in a conductive (shorted) state, the radiator 230, the first tuning circuit 251, and the feed circuit 240 are used to generate a second resonance, a resonance frequency band of the second resonance includes the first frequency band.

[0288] It should be understood that when the first tuning circuit 251 is in the conductive (shorted) state, the first connection point 231 is conductive (shorted) with the ground plane 300, the first end of the radiator 230 is a ground end, and the second end is an open end, the second resonance can be generated by the line CM mode described in the above embodiments.

[0289] According to the embodiments of the present application, when the electronic device 100 is in the closed state, the first tuning circuit 251 is in the open (disconnected) state, and the first end and the second end of the radiator 230 are open ends. The first resonance is generated by the line DM mode described in the above embodiments. When the electronic device 100 is in the closed state, the resonance generated by the cavity coupled by the antenna 200 in the vicinity of the radiator 230 is generated by the line CM mode.

[0290] When the electronic device 100 is in the closed state, the antenna 200 generates a first electric field in the first region by the line DM mode, and a cavity formed between the first metal layer 301 and the second metal layer 302 generates a second electric field in the first region by the line CM mode, the first electric field and the second electric field are orthogonal, and the first region includes the radiator 230. In an embodiment, the first region can be understood as a region with a minimum distance from the radiator 230 less than 10 mm, or within 5 mm.

[0291] Since the first electric field and the second electric field are orthogonal, the cavity is less coupled to the energy of the antenna 200, and correspondingly, the strength of the generated resonance is weak, and the cavity has less influence on the radiation characteristics of the antenna 200.

[0292] Therefore, when the electronic device 100 is in the closed state, the second resonance of the antenna 200 generated by the line DM mode has less influence on the radiation in the first frequency band, and the antenna 200 has good radiation characteristics in the first frequency band.

[0293] At the same time, since the electronic device 100 is in the unfolded state, the cavity does not exist, and the antenna 200 can generate resonance by the whole branch (the conductor part between the first position 211 and the second position 212), and the whole branch participates in radiation, the radiation aperture of the antenna 200 is large, and the antenna 200 has better radiation characteristics (for example, radiation efficiency) in the first frequency band.

[0294] In an embodiment, the length L1 of the radiator 230 on the first edge 241 satisfies: 0.2×L0≤L1≤0.8×L0, where L0 is the length of the radiator 230.

[0295] It should be understood that the length L1 of the radiator 230 on the first edge 241 can be understood as the size of the radiator 230 in the extension direction (for example, the y direction) of the first edge 241. For the sake of brevity of the discussion, the length on the edge described in the embodiments of the present application can be understood accordingly, and will not be repeated here.

[0296] In an embodiment, the length L1 of the radiator 230 on the first edge 241 satisfies: 0.25×L0≤L1≤0.75×L0, where L0 is the length of the radiator 230.

[0297] In an embodiment, the length L1 of the radiator 230 on the first edge 241 satisfies: 0.2×L1≤L2≤5×L1, where L2 is the length of the radiator 230 on the second edge 242.

[0298] In an embodiment, the length L1 of the radiator 230 on the first edge 241 satisfies: 0.33×L1≤L2≤3×L1, where L2 is the length of the radiator 230 on the second edge 242.

[0299] In one embodiment, the length L1 of the radiator 230 on the first edge 241 and the length L2 of the radiator 230 on the second edge 242 satisfy: 0.5 x L1≤ L2≤ 2 x L1.

[0300] It should be understood that when the length L1 of the radiator 230 on the first edge 241 and the length L2 of the radiator 230 on the second edge 242 satisfy the above ratio, the electronic device 100 is in the closed state, the antenna 200 produces less resonant coupling to the cavity, and the cavity has less effect on the radiation characteristics of the antenna 200 in the first frequency band.

[0301] In one embodiment, the length L4 of the radiator 230 between the feed point 222 and the first position 211 and the length L0 of the radiator 230 satisfy: 0.25 x L0≤ L4≤ 0.75 x L0.

[0302] In one embodiment, the length L4' of the radiator 230 between the feed point 222 and the second position 212 and the length L0 of the radiator 230 satisfy: 0.25 x L0≤ L4'≤ 0.75 x L0.

[0303] It should be understood that the position of the feed point 222 can be used to adjust the radiation characteristics (e.g., resonant point frequency) of the antenna 200.

[0304] In one embodiment, the antenna 200 further includes a second tuning circuit 252, as shown in FIG. 25. The radiator 230 further includes a second connection point 232. The second tuning circuit 252 is coupled to the second connection point 232.

[0305] It should be understood that the second tuning circuit 252 can be used to adjust the radiation characteristics (e.g., resonant point frequency) of the antenna 200.

[0306] In one embodiment, the length of the radiator 230 between the second connection point 232 and the second position 212 is less than or equal to 10 mm.

[0307] In one embodiment, the length of the radiator 230 between the second connection point 232 and the second position 212 is less than or equal to 5 mm.

[0308] It should be understood that the first connection point 231 and / or the second connection point 232 can be disposed close to the open end of the radiator 230. The open end of the radiator 230 has a stronger electric field, and the first tuning circuit 251 and / or the second tuning circuit 252 can have a larger adjustment range.

[0309] In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to a capacitance. In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductance, and the equivalent inductance value is greater than or equal to 30 nH.

[0310] It should be understood that when the equivalent capacitance value or the equivalent inductance value of the first tuning circuit 251 and / or the equivalent capacitance value or the equivalent inductance value of the second tuning circuit 252 is within the above range, the first tuning circuit 251 and / or the second tuning circuit 252 is in an open circuit (disconnected) state. The first tuning circuit 251 and / or the second tuning circuit 252 can make the first connection point 231 and the ground plane 300 and the second connection point 232 and the ground plane 300 in an open circuit (disconnected) state, and the first end and / or the second end of the radiator 230 is an open end.

[0311] In an embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to a resistance of 0 ohm. In an embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductance, and the equivalent inductance value is less than or equal to 10 nH. In an embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductance, and the equivalent inductance value is less than or equal to 5.6 nH.

[0312] It should be understood that when the equivalent resistance value or the equivalent inductance value of the first tuning circuit 251 and / or the equivalent resistance value or the equivalent inductance value of the second tuning circuit 252 is within the above range, it can be considered that the first tuning circuit 251 and / or the second tuning circuit 252 is in a conduction (short circuit) state. The first tuning circuit 251 can make the first connection point 231 and the ground plane 300 in a conduction (short circuit) state. The second tuning circuit 252 can make the second connection point 232 and the ground plane 300 in a conduction (short circuit) state. The first end and / or the second end of the radiator 230 is a grounded end.

[0313] In the embodiments of the present application, only the first tuning circuit is in a conduction state (short circuit), the second tuning circuit is in an open circuit state (disconnected), the first connection point 231 and the ground plane 300 are in a conduction state (short circuit), and the second connection point 232 and the ground plane 300 are in an open circuit state (disconnected). In actual production or design, the first connection point 231 and the ground plane 300 can be in an open circuit state (disconnected), and the second connection point 232 and the ground plane 300 can be in a conduction state (short circuit). The embodiments of the present application do not limit this, and for the sake of brevity of the discussion, it will not be repeated.

[0314] In an embodiment, the first frequency band includes a communication frequency band in a low frequency band (LB) (698 MHz-960 MHz) range in a cellular network.

[0315] In an embodiment, the first frequency band can also include a communication frequency band in a middle band (MB) (1710-2170 MHz) of the cellular network. In an embodiment, the first frequency band includes a communication frequency band in a high band (HB) (2300-2690 MHz) of the cellular network, a communication frequency band in a sub 6G range.

[0316] It should be understood that the first frequency band can be determined according to actual production or design, and the embodiments of the present application do not make any limitation. For example, the first frequency band can also be at least part of the communication frequency band in the sub 6G range. For the sake of brevity of the discussion, it will not be repeated.

[0317] FIG. 26 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0318] As shown in FIGS. 26 and 27, the electronic device 100 can include a first housing 201 and a second housing 202 and a floor 300.

[0319] The first housing 201 includes a first bezel 210, at least part of which is spaced apart from the floor 300. The second housing 202 includes a second bezel 220, at least part of which is spaced apart from the floor 300.

[0320] The first housing 201 and the second housing 202 are configured to be folded relative to each other to a closed state of the electronic device 100.

[0321] In an embodiment, the electronic device 100 further includes a hinge 203. The hinge 203 is located between the first housing 201 and the second housing 202, and the hinge 203 is rotatably connected to the first housing 201 and the second housing 202, respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In an embodiment, the floor 300 can include a first portion and a second portion. The first portion can be located in the first housing 201, and the second portion can be located in the second housing 202. The first portion and the second portion can be connected by the hinge 203.

[0322] The first bezel 210 includes a first position 211 and a second position 212. The first bezel 210 has an insulating gap at the first position 211 or is coupled to the floor 300. The first bezel 210 has an insulating gap at the second position 212 or is coupled to the floor 300.

[0323] The electronic device 100 further includes a first metal layer 301 and a second metal layer 302. The first bezel 210 surrounds an outer periphery of the first metal layer 301. The second bezel 220 surrounds an outer periphery of the second metal layer 302.

[0324] When the electronic device 100 is in the closed state, the first metal layer 301 and the second metal layer 302 are opposite and do not contact each other. In an embodiment, a cavity is formed between the first metal layer 301 and the second metal layer 302. In an embodiment, the first metal layer 301 and the second metal layer 302 can be connected with the rotating shaft 203 respectively.

[0325] The electronic device 100 further includes an antenna 200. The antenna 200 includes a radiator 230 and a feed circuit 240.

[0326] The radiator 230 includes a conductive part of the first frame 210 between the first position 211 and the second position 212. At least part of the radiator 230 is spaced apart from the floor 300.

[0327] The radiator 230 includes a feed point. The feed circuit 240 is coupled with the feed point 222 to feed in a telecommunication signal (radio frequency signal) of a first frequency band.

[0328] In an embodiment, when the electronic device 100 is in the closed state, the radiator 230 generates a first resonance by a half-wavelength mode, and a resonance frequency band of the first resonance includes the first frequency band.

[0329] In an embodiment, when the electronic device 100 is in the unfolded state, the radiator 230 generates a second resonance by a quarter-wavelength mode, and a resonance frequency band of the second resonance includes the first frequency band.

[0330] According to the embodiment of the present application, when the electronic device 100 is in the closed state, the antenna 200 generates resonance by a half-wavelength mode. As in the above embodiment, the antenna 200 can generate resonance by a line CM mode or a line DM mode, so that the cavity 303 coupled to the antenna 200 has less energy, and correspondingly, the resonance generated has less intensity, and the cavity 303 has less influence on the radiation characteristics of the antenna 200.

[0331] Therefore, when the electronic device 100 is in the closed state, the first resonance generated by the antenna 200 by the half-wavelength mode has less influence on the radiation in the first frequency band, and the antenna 200 has good radiation characteristics in the first frequency band.

[0332] At the same time, since the electronic device 100 is in the unfolded state, the cavity does not exist, and the antenna 200 can generate resonance by other modes (for example, a quarter-wavelength mode), and all stubs participate in radiation, the antenna 200 has a larger radiation aperture, and the antenna 200 has better radiation characteristics (for example, radiation efficiency) in the first frequency band.

[0333] In one embodiment, when the electronic device 100 is in the closed state, the antenna 200 generates a first electric field in the first region, the cavity formed between the first metal layer 301 and the second metal layer 302 generates a second electric field in the first region, the first electric field and the second electric field are orthogonal, and the first region includes the radiator 230. In one embodiment, the first region can be understood as a region in which the minimum distance between the radiator 230 is less than 10 mm, or within 5 mm.

[0334] It should be understood that the first electric field generated by the antenna 200 in the first region is orthogonal to the second electric field generated by the cavity formed between the first metal layer 301 and the second metal layer 302 in the first region. Due to the orthogonality of the first electric field and the second electric field, the cavity 303 is less coupled to the energy by the antenna 200, and correspondingly, the strength of the generated resonance is weaker.

[0335] In one embodiment, the first bezel 210 includes a first side 241 and a second side 242 that are angularly intersected. In one embodiment, the length of the first side 241 is less than the length of the second side 242.

[0336] In one embodiment, the first position 211 is located on the second side 242 and the second position 212 is located on the second side 242. In one embodiment, the first position 211 is located on the first side 241 and the second position 212 is located on the second side 242.

[0337] It should be understood that the embodiments of the present application do not limit the first position 211 and the second position 212 to be located on the first side 241 or the second side 242, and can be adjusted according to actual production or design.

[0338] In one embodiment, the first bezel 210 has a first insulating gap and a second insulating gap at the first position 211 and the second position 212, respectively. In one embodiment, the radiator 230 includes a grounding point that is coupled to the ground plate 300.

[0339] In one embodiment, the first bezel 210 has a first insulating gap at the first position 211. The first bezel 210 is coupled to the ground plate 300 at the second position 212.

[0340] It should be understood that the embodiments of the present application do not limit the boundary conditions of the radiator 230. The first end and the second end of the radiator 230 are open ends, or the first end is a grounded end and the second end is an open end, or the first end and the second end are grounded ends, and the embodiments of the present application do not limit this. For the sake of brevity of the discussion, they will not be described one by one.

[0341] In one embodiment, the antenna 200 further includes a first tuning circuit 251. The radiator 230 further includes a first connection point 231. The first tuning circuit 251 is coupled to the first connection point 231.

[0342] In one embodiment, the antenna 200 further comprises a second tuning circuit 252. The radiator 230 further comprises a second connection point 232. The second tuning circuit 252 is coupled with the second connection point 232.

[0343] It should be understood that the first tuning circuit 251 and / or the second tuning circuit 252 can be used to adjust the radiation characteristics (e.g., resonant point frequency) of the antenna 200.

[0344] In one embodiment, the length of the radiator 230 between the first connection point 231 and the first location 211 is less than or equal to 10 mm. In one embodiment, the length of the radiator 230 between the second connection point 232 and the second location 212 is less than or equal to 10 mm.

[0345] In one embodiment, the length of the radiator 230 between the first connection point 231 and the first location 211 is less than or equal to 5 mm. In one embodiment, the length of the radiator 230 between the second connection point 232 and the second location 212 is less than or equal to 5 mm.

[0346] It should be understood that the first connection point 231 and / or the second connection point 232 can be disposed close to the open end of the radiator 230. The open end of the radiator 230 has a stronger electric field, and the first tuning circuit 251 and / or the second tuning circuit 252 can have a greater adjustment range.

[0347] In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to a capacitance. In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductance, and the equivalent inductance value is greater than or equal to 30 nH.

[0348] It should be understood that when the equivalent capacitance value or the equivalent inductance value of the first tuning circuit 251, or the equivalent capacitance value or the equivalent inductance value of the second tuning circuit 252 is within the above range, the first tuning circuit 251 and / or the second tuning circuit 252 is in an open (disconnected) state. The first tuning circuit 251 and / or the second tuning circuit 252 can cause the first connection point 231 and the ground plane 300, and the second connection point 232 and the ground plane 300 to be in an open (disconnected) state, and the first end and / or the second end of the radiator 230 is an open end.

[0349] In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to a 0 ohm resistance. In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductance, and the equivalent inductance value is less than or equal to 10 nH. In one embodiment, the first tuning circuit 251 and / or the second tuning circuit 252 is equivalent to an inductance, and the equivalent inductance value is less than or equal to 5.6 nH.

[0350] It should be understood that when the equivalent resistance value or the equivalent inductance value of the first tuning circuit 251 and / or the equivalent resistance value or the equivalent inductance value of the second tuning circuit 252 is within the above range, it can be considered that the first tuning circuit 251 and / or the second tuning circuit 252 is in a conductive (short circuit) state. The first tuning circuit 251 can make the first connection point 231 and the ground plate 300 in a conductive (short circuit) state. The second tuning circuit 252 can make the second connection point 232 and the ground plate 300 in a conductive (short circuit) state. The first end and / or the second end of the radiator 230 is a ground end.

[0351] It should be understood that when the first connection point 231 and / or the second connection point 232 is close to the first position 211 and / or the second position 212, the first tuning circuit 251 and / or the second tuning circuit 252 can be used to adjust the boundary condition of the radiator 230. The radiator 230 can have different boundary conditions when the electronic device 100 is in the same state (expanded state, closed state), so that the antenna 200 has good radiation characteristics in the first frequency band.

[0352] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic device, comprising: The electronic device comprises: a floor; a first housing and a second housing configured to be folded relative to each other to a closed state of the electronic device; the first housing comprises a first bezel, and the second housing comprises a second bezel, wherein the first bezel comprises a first side and a second side intersecting at an angle, the first side comprises a first position, and the second side comprises a second position, and the first bezel has a first insulating gap and a second insulating gap at the first position and the second position, respectively; a first metal layer and a second metal layer, the first bezel surrounds an outer periphery of the first metal layer, and the second bezel surrounds an outer periphery of the second metal layer, and the first metal layer and the second metal layer are opposite to each other and do not contact each other based on the electronic device being in the closed state; an antenna comprising: a radiator comprising a conductive part of the first bezel between the first position and the second position, at least part of the radiator being spaced apart from the floor; a feed circuit coupled to a feed point of the radiator; and a ground coupled between the feed point and the floor. Based on the electronic device being in the closed state, the radiator, the ground, and the feed circuit are configured to generate a first resonance and a second resonance, a resonance point frequency of the first resonance is less than a resonance point frequency of the second resonance, and a resonance frequency band of the second resonance comprises a first frequency band. Based on the electronic device being in an unfolded state, the radiator, the ground, and the feed circuit are configured to generate a third resonance, and a resonance frequency band of the third resonance comprises the first frequency band.

2. The electronic device of claim 1, wherein a length L1 of the radiator on the first side and a length L2 of the radiator on the second side satisfy 0.2×L1≤L2≤5×L1.

3. The electronic device of claim 1 or 2, wherein a length L3 of the radiator between the ground and the first position and a length L0 of the radiator satisfy 0.25×L0≤L3≤0.75×L0.

4. The electronic device of any one of claims 1 to 3, wherein a length L4 of the radiator between the feed point and the first position and a length L0 of the radiator satisfy 0.25×L0≤L4≤0.75×L0.

5. The electronic device of any one of claims 1 to 4, wherein a length L5 of the radiator between the ground and the feed point and a length L0 of the radiator satisfy L5≤0.25×L0.

6. The electronic device of any one of claims 1 to 5, wherein the antenna further comprises a first tuning circuit and a second tuning circuit. ​ ​ ​ ​ ​ The radiator further includes a first connection point between the first position and the ground point, and a second connection point between the second position and the ground point, the first tuning circuit is coupled with the first connection point, and the second tuning circuit is coupled with the second connection point.

7. The electronic device of any one of claims 1-6, wherein: a length of the radiator between the first connection point and the first position is less than or equal to 10 mm, and / or a length of the radiator between the second connection point and the second position is less than or equal to 10 mm.

8. The electronic device of claim 6 or 7, wherein: based on the electronic device being in the closed state, the first tuning circuit and the second tuning circuit are in an open circuit state; based on the electronic device being in the unfolded state, the first tuning circuit is in a short circuit state and the second tuning circuit is in an open circuit state.

9. The electronic device of claim 8, wherein: based on the electronic device being in the unfolded state, an equivalent resistance value of the first tuning circuit is 0 ohm, or an equivalent inductance value of the first tuning circuit is less than or equal to 10 nH.

10. The electronic device of claim 8 or 9, wherein: the feed point is between the first position and the ground point; based on the electronic device being in the unfolded state, the radiator between the ground point and the first position or the second position, the first tuning circuit, the ground member, and the feed circuit are configured to generate the third resonance.

11. The electronic device of any one of claims 1-10, wherein: a width of the ground member connected with the first bezel is greater than or equal to 1 mm and less than or equal to 20 mm.

12. An electronic device, comprising: comprising: a floor; a first housing and a second housing configured to be folded relative to each other to a closed state of the electronic device; the first housing includes a first bezel, and the second housing includes a second bezel, wherein the first bezel includes a first edge and a second edge intersecting at an angle, the first edge includes a first position, and the second edge includes a second position, the first bezel has a first insulating gap and a second insulating gap at the first position and the second position, respectively; a first metal layer and a second metal layer, the first bezel surrounds an outer periphery of the first metal layer, and the second bezel surrounds an outer periphery of the second metal layer, the first metal layer and the second metal layer are opposite and do not contact each other based on the electronic device being in the closed state; an antenna comprising: a radiator including a conductive portion of the first bezel between the first position and the second position, at least a portion of the radiator is spaced apart from the floor; a feed circuit, the radiator includes a feed point, and the feed circuit is coupled with the feed point; a first tuning circuit, the radiator further includes a first connection point, and the first tuning circuit is coupled with the first connection point; wherein, based on the electronic device being in the closed state, the first tuning circuit being in an open state, the radiator and the feed circuit being configured to generate a first resonance, a resonance frequency band of the first resonance including a first frequency band; based on the electronic device being in the unfolded state, the first tuning circuit being in a short state, the radiator, the first tuning circuit and the feed circuit being configured to generate a second resonance, a resonance frequency band of the second resonance including the first frequency band. 13.The electronic device of claim 12, wherein a length of the radiator between the first connection point and the first position is less than or equal to 10 mm. 14.The electronic device of claim 12 or 13, wherein a length L1 of the radiator on the first side and a length L2 of the radiator on the second side satisfy: 0.2 × L1 ≤ L2 ≤ 5 × L1. 15.The electronic device of any one of claims 12 to 14, wherein a length L4 of the radiator between the feed point and the first position and a length L0 of the radiator satisfy: 0.25 × L0 ≤ L4 ≤ 0.75 × L0. 16.The electronic device of any one of claims 12 to 15, wherein the antenna further comprises a second tuning circuit; and the radiator further comprises a second connection point, a length of the radiator between the second connection point and the second position being less than or equal to 10 mm, the second tuning circuit being coupled with the second connection point. 17.The electronic device of any one of claims 12 to 16, wherein, based on the electronic device being in the unfolded state, an equivalent resistance value of the first tuning circuit is 0 ohm, or an equivalent inductance value of the first tuning circuit is less than or equal to 10 nH. comprising: a floor; a first housing and a second housing, the first housing and the second housing being configured to be folded relative to each other to a closed state of the electronic device; the first housing comprising a first bezel, the second housing comprising a second bezel, the first bezel comprising a first position and a second position, the first bezel having an insulating gap at the first position or being coupled with the floor, the first bezel having an insulating gap at the second position or being coupled with the floor; a first metal layer and a second metal layer, the first bezel surrounding an outer periphery of the first metal layer, the second bezel surrounding an outer periphery of the second metal layer, based on the electronic device being in the closed state, the first metal layer and the second metal layer being opposite to each other and not in contact with each other; an antenna, the antenna comprising:

18. An electronic device, comprising: a radiator, the radiator comprising a conductive portion of the first bezel between the first position and the second position, at least a portion of the radiator being spaced apart from the floor; a feed circuit, the radiator comprising a feed point, the feed circuit being coupled with the feed point; wherein, based on the electronic device being in the closed state, the radiator generating a first resonance by a half-wavelength mode, a resonance frequency band of the first resonance including a first frequency band. ​ ​ ​ ​ ​ ​ Based on that the electronic device is in the unfolded state, the radiator generates a second resonance by a quarter wavelength mode, and a resonance frequency band of the second resonance includes the first frequency band.

19. The electronic device of claim 18, wherein, the antenna further comprises a first tuning circuit; the radiator further comprises a first connection point, a length of the radiator between the first connection point and the first position is less than or equal to 10 mm, and the first tuning circuit is coupled with the first connection point.

20. The electronic device of claim 18 or 19, wherein, the antenna further comprises a second tuning circuit; the radiator further comprises a second connection point, a length of the radiator between the second connection point and the second position is less than or equal to 10 mm, and the second tuning circuit is coupled with the second connection point.

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