Foldable electronic equipment

Abstract

The embodiment of the invention provides foldable electronic equipment. The foldable electronic equipment comprises an antenna. The foldable electronic equipment comprises a first frame and a second frame which are arranged in a foldable mode. According to the antenna, part of the first frame serves as a main branch knot, part of the second frame serves as a parasitic branch knot, the parasitic branch knot is electrically connected with an electronic element, and when the foldable electronic equipment is in a folded state, the parasitic branch knot is used for generating first parasitic resonance and second parasitic resonance, so that the working bandwidth of the antenna is expanded; and the communication performance of the foldable electronic equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a foldable electronic device. Background Art

[0002] As people's demand for high-speed data transmission increases, the development trend of industrial design (ID) of electronic devices is large screen ratio and multiple cameras. This has led to a significant reduction in antenna clearance and increasingly limited layout space.

[0003] Under the current situation, the communication frequency bands of electronic devices will continue to coexist with the third generation of mobile communication technology (3G), the fourth generation of mobile communication technology (4G), and the fifth generation of mobile communication technology (5G), and the frequency bands will be increasingly wide. Based on these changes, it is imperative to expand the working bandwidth of antennas on electronic devices. Summary of the invention

[0004] An embodiment of the present application provides a foldable electronic device, including an antenna. The foldable electronic device includes a first frame and a second frame that can be folded. The antenna uses part of the frame of the first frame as a radiation branch (including a feeding point), and part of the frame of the second frame as a parasitic branch. The parasitic branch is electrically connected to an electronic component. When the foldable electronic device is in a folded state, the resonance generated by multiple modes of the parasitic branch is used to expand the working bandwidth of the antenna, thereby improving the communication performance of the foldable electronic device.

[0005] In a first aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced apart from the floor, and the second frame is at least partially spaced apart from the floor; the first frame comprises a first position and a second position; the second frame comprises a third position and a fourth position, the second frame has a first gap at the third position, and the second frame is coupled to the floor at the fourth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and an antenna, the antenna comprising: a first radiator and a feeding circuit, the first radiator is a conductive part of the first frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; and a second radiator and a first electronic element, the second radiator is a conductive part of the second frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; The conductive part of the frame is between the third position and the fourth position, and the length of the second radiator is greater than or equal to two-fifths of the length of the first radiator; wherein the second radiator includes a first connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the floor, or wherein the second radiator includes a first connection point and a second connection point, the first end of the first electronic component is coupled to the first connection point, the second end of the first electronic component is coupled to the second connection point, and the second frame has a second gap between the first connection point and the second connection point; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator is used to generate a first parasitic resonance, and the second radiator and the first electronic component are used to generate a second parasitic resonance, wherein the first direction is the thickness direction of the foldable electronic device.

[0006] According to an embodiment of the present application, when the foldable electronic device is in a folded state, the first radiator in the antenna acts as a main radiation branch (a branch into which the signal is fed from the feeding point), and the second radiator acts as a parasitic branch. The second radiator can generate a first parasitic resonance and a second parasitic resonance by coupling with the first radiator. The resonant frequency of the first parasitic resonance can be determined by the length of the second radiator, and the first parasitic resonance and the second parasitic resonance are brought closer to the first resonance by the length of the second radiator and the electrical parameters of the first electronic component. The first resonance, the first parasitic resonance, and the second parasitic resonance can be used to expand the working bandwidth of the antenna and jointly support an operating frequency band of the foldable electronic device 100.

[0007] In combination with the first aspect, in some implementations of the first aspect, based on the first end of the first electronic component being coupled to the first connection point and the second end of the first electronic component being coupled to the floor, a length L1 of the second radiator between the first connection point and the third position and a length L2 of the second radiator between the third position and the fourth position satisfy: L2 / 4≤L1≤5×L2 / 12.

[0008] According to an embodiment of the present application, when the second radiator resonates, an electric field zero point (large current point) can be generated on the second radiator (the current zero point included in the current and electric field distribution corresponding to the three-quarter wavelength mode). The first electronic component is grounded in the electric field zero point area, and the quarter wavelength mode generates an electric field zero point near the first connection point, so that it becomes a new three-quarter wavelength mode. In addition, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted using the first electronic component. At the same time, since the first connection point is located in the electric field zero point area of ​​the three-quarter wavelength mode, the first electronic component is electrically connected to the floor in this area, and the boundary conditions are not changed, and the original three-quarter wavelength mode is little affected. Therefore, the antenna can include two three-quarter wavelength modes to expand the working bandwidth of the antenna.

[0009] In combination with the first aspect, in some implementations of the first aspect, an equivalent capacitance value of the first electronic component is greater than 10 pF, or an equivalent inductance value of the first electronic component is less than 5 nH.

[0010] In combination with the first aspect, in certain implementations of the first aspect, at the resonance point of the first parasitic resonance, the second radiator includes an electric field zero point region, the electric field zero point region includes the electric field zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between a point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm, and the first connection point is located in the electric field zero point region.

[0011] In combination with the first aspect, in certain implementations of the first aspect, at the resonance point of the first parasitic resonance, on both sides of the first connection point, the currents on the second radiator are in the same direction; at the resonance point of the second parasitic resonance, on both sides of the first connection point, the currents on the second radiator are in opposite directions.

[0012] In combination with the first aspect, in certain implementations of the first aspect, based on the first end of the first electronic component being coupled to the first connection point, the second end of the first electronic component being coupled to the second connection point, the length L3 of the second border between the first connection point and the fourth position and the length L2 of the second border between the third position and the fourth position satisfy: L2 / 4≤L3≤5×L2 / 12.

[0013] According to an embodiment of the present application, when the second radiator resonates, a large electric field point (current zero point) can be generated on the second radiator (the current zero point included in the current and electric field distribution corresponding to the three-quarter wavelength mode). A second slit is set in the area of ​​the large electric field point, and the quarter-wavelength mode generates a large electric field point near the second slit, so that it becomes a new three-quarter wavelength mode. In addition, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted by using the first electronic component. At the same time, since the second slit is located in the area of ​​the large electric field point of the three-quarter wavelength mode, setting the second slit in this area does not change the boundary conditions, and the original three-quarter wavelength mode is little affected. Therefore, the antenna can include two three-quarter wavelength modes to expand the working bandwidth of the antenna.

[0014] In combination with the first aspect, in some implementations of the first aspect, an equivalent capacitance value of the first electronic component is less than 1 pF, or the first electronic component is an inductor.

[0015] In combination with the first aspect, in certain implementations of the first aspect, at the resonance point of the first parasitic resonance, the second radiator includes a current zero point region, the current zero point region includes the current zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between the point in the current zero point region and the current zero point is less than or equal to 5 mm, and the first connection point and the second connection point are located in the current zero point region.

[0016] In combination with the first aspect, in some implementations of the first aspect, at the resonance point of the second parasitic resonance, on both sides of the second gap, the electric field between the second radiator and the floor is opposite.

[0017] In combination with the first aspect, in some implementations of the first aspect, a frequency difference between a resonance point of the second parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the length of the second radiator is greater than or equal to two-fifths of the length of the first radiator and less than or equal to two-sevenths of the length of the first radiator; the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the first frame opens a third slit at the first position, the first frame is coupled to the floor at the second position, and based on the foldable electronic device being in a folded state, the first slit and the third slit are aligned along the first direction, or the second slit and the third slit are aligned along the first direction.

[0020] In a second aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced apart from the floor, and the second frame is at least partially spaced apart from the floor; the first frame comprises a first position and a second position; the second frame comprises a third position and a fourth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and an antenna, the antenna comprising: a first radiator and a feeding circuit, the first radiator is a conductive part of the first frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; and a second radiator and a first electronic component, the second radiator is a conductive part of the second frame between the third position and the fourth position, and the length of the second radiator is greater than or equal to two-thirds of the length of the first radiator; wherein the second frame has a first slit and a second slit at the third position and the fourth position respectively, The second radiator includes a first connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the floor, the first connection point is located in the central area of ​​the second radiator, and the distance between the point in the central area and the center of the second radiator is less than or equal to 5 mm; or wherein the second frame is coupled to the floor at both the third position and the fourth position, the second radiator includes a first connection point and a second connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the second connection point, the second radiator opens a third gap between the first connection point and the second connection point, and the first connection point and the second connection point are located in the central area; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator is used to generate a first parasitic resonance, and the second radiator and the first electronic component are used to generate a second parasitic resonance, wherein the first direction is the thickness direction of the foldable electronic device.

[0021] In combination with the second aspect, based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the floor, in certain implementations of the second aspect, the equivalent capacitance value of the first electronic component is greater than 10pF, or the equivalent inductance value of the first electronic component is less than 5nH.

[0022] In combination with the second aspect, in certain implementations of the second aspect, the second radiator includes an electric field zero point region when generating the first parasitic resonance, the electric field zero point region includes the electric field zero point when the second radiator generates the first parasitic resonance, the distance between a point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm, and the first connection point is located in the electric field zero point region.

[0023] In combination with the second aspect, in certain implementations of the second aspect, at the resonance point of the first parasitic resonance, on both sides of the first connection point, the current on the second radiator is in the same direction; at the resonance point of the second parasitic resonance, on both sides of the first connection point, the current on the second radiator is in opposite directions.

[0024] In combination with the second aspect, in certain implementations of the second aspect, based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the second connection point, the equivalent capacitance value of the first electronic component is less than 1pF, or the first electronic component is an inductor.

[0025] In combination with the second aspect, in certain implementations of the second aspect, the second radiator includes a current zero point region when generating the first parasitic resonance, the current zero point region includes a current zero point when the second radiator generates the first parasitic resonance, the distance between a point in the current zero point region and the current zero point is less than or equal to 5 mm, and the first connection point and the second connection point are located in the current zero point region.

[0026] In combination with the second aspect, in certain implementations of the second aspect, at the resonance point of the first parasitic resonance, on both sides of the third gap, the electric field between the second radiator and the floor is in the same direction; at the resonance point of the second parasitic resonance, on both sides of the third gap, the electric field between the second radiator and the floor is in opposite directions.

[0027] In combination with the second aspect, in some implementations of the second aspect, a frequency difference between a resonance point of the second parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

[0028] In combination with the second aspect, in certain implementations of the second aspect, the length of the second radiator is greater than or equal to three-half of the length of the first radiator and less than or equal to two-fifths of the length of the first radiator; the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz.

[0029] In combination with the second aspect, in certain implementations of the second aspect, the first frame has a fourth slit at the first position, the first frame is coupled to the floor at the second position, and based on the foldable electronic device being in a folded state, the fourth slit and the third slit are aligned along the first direction, or the fourth slit and the second slit are aligned along the first direction, or the fourth slit and the first slit are aligned along the first direction.

[0030] In a third aspect, a foldable electronic device is provided, comprising: a first shell, a second shell and a floor, wherein the first shell comprises a first frame, the second shell comprises a second frame, the first frame is at least partially spaced apart from the floor, and the second frame is at least partially spaced apart from the floor; the first frame comprises a first position and a second position; the second frame comprises a third position and a fourth position; a first rotating shaft, the first rotating shaft is located between the first shell and the second shell, and the first rotating shaft is rotatably connected to the first shell and the second shell respectively; and an antenna, the antenna comprising: a first radiator and a feeding circuit, the first radiator is a conductive part of the first frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; and a second radiator and a first electronic component, the second radiator is a conductive part of the second frame between the third position and the fourth position, wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator is used to generate a first parasitic resonance, and the second radiator and the first electronic component are used to generate A second parasitic resonance, wherein the first direction is the thickness direction of the foldable electronic device; wherein, at the resonance point of the first parasitic resonance, the second radiator includes an electric field zero point region, the electric field zero point region includes the electric field zero point of the second radiator at the resonance point of the first parasitic resonance, and the distance between the point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm, the second radiator includes a first connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the floor, the first connection point is located in the electric field zero point region, or wherein, in the first a resonance point of a parasitic resonance, the second radiator includes a current zero point region, the current zero point region includes the current zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between the point in the current zero point region and the current zero point is less than or equal to 5 mm, the second radiator includes a first connection point and a second connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the second connection point, the second frame opens a first gap between the first connection point and the second connection point, and the first connection point and the second connection point are located in the current zero point region.

[0031] In combination with the third aspect, in certain implementations of the third aspect, based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the floor; at the resonance point of the first parasitic resonance, on both sides of the first connection point, the currents on the second radiator are in the same direction; at the resonance point of the second parasitic resonance, on both sides of the first connection point, the currents on the second radiator are in opposite directions.

[0032] In combination with the third aspect, in certain implementations of the third aspect, based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the second connection point; at the resonance point of the first parasitic resonance, on both sides of the first gap, the electric fields between the second radiator and the floor are in the same direction; at the resonance point of the second parasitic resonance, on both sides of the first gap, the electric fields between the second radiator and the floor are in opposite directions.

[0033] In combination with the third aspect, in certain implementations of the third aspect, the first parasitic resonance is the resonance generated when the second radiator operates in three-quarter mode, and the second parasitic resonance is the resonance generated when the second radiator operates in one-quarter mode; or the first parasitic resonance is the resonance generated when the second radiator operates in differential mode, and the second parasitic resonance is the resonance generated when the second radiator operates in common mode.

[0034] In combination with the third aspect, in certain implementations of the third aspect, the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz, and / or the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz.

[0035] In combination with the third aspect, in some implementations of the third aspect, the first resonance, the first parasitic resonance, and the second parasitic resonance are used to jointly support an operating frequency band of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0037] Figure 2 It is a schematic structural diagram of the foldable electronic device 100 in the outward folded state.

[0038] Figure 3 is a schematic structural diagram of the foldable electronic device 100 in a possible unfolded state.

[0039] Figure 4is a schematic structural diagram of the foldable electronic device 100 in a possible folded state.

[0040] Figure 5 is a schematic structural diagram of the foldable electronic device 100 in a possible partially unfolded state.

[0041] Figure 6 This is a schematic diagram of the common mode structure of an antenna provided in the present application and the corresponding current and electric field distribution.

[0042] Figure 7 This is a schematic diagram of the structure of a differential mode of an antenna provided in the present application and the corresponding current and electric field distribution.

[0043] Figure 8 It is the structure of the common mode mode of the antenna provided in this application and the corresponding distribution diagram of current, electric field and magnetic current.

[0044] Fig. 9 It is the structure of the differential mode of the antenna provided by this application and the corresponding distribution diagram of current, electric field and magnetic current.

[0045] Fig.10 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0046] Fig.11 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0047] Fig.12 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0048] Fig.13 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0049] Fig.14 yes Fig.13 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG.

[0050] Fig.15 yes Fig.13 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0051] Fig.16 yes Fig.13 The diagram shows the electric field and current distribution in the vicinity of the second radiator in the antenna 200 at the second parasitic resonance (eg, 0.85 GHz).

[0052] Fig.17 yes Fig.13The diagram shows the electric field and current distribution in the vicinity of the second radiator in the antenna 200 at the first parasitic resonance (eg, 0.96 GHz).

[0053] Fig.18 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0054] Fig.19 yes Fig.18 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG.

[0055] Fig. 20 yes Fig.18 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0056] Fig.21 yes Fig.18 The diagram shows the electric field and current distribution in the vicinity of the second radiator in the antenna 200 at the first parasitic resonance (eg, 0.94 GHz).

[0057] Fig. 22 yes Fig.18 The diagram shows the electric field and current distribution in the vicinity of the first radiator in the antenna 200 at the second parasitic resonance (eg, 0.98 GHz).

[0058] Fig.23 It is a schematic diagram of another foldable electronic device 200 provided in an embodiment of the present application.

[0059] Fig.24 yes Fig.23 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG.

[0060] Fig.25 yes Fig.23 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0061] Fig.26 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0062] Fig. 27 It is a schematic diagram of a distributed device provided in an embodiment of the present application.

[0063] Fig.28 yes Fig.26 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG.

[0064] Fig.29 yes Fig.26 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0065] Fig.30 yes Fig.26The diagram shows the electric field distribution in the vicinity of the second radiator in the antenna 200 at the first parasitic resonance (eg, 0.91 GHz).

[0066] Fig.31 yes Fig.26 The diagram shows the electric field distribution in the vicinity of the first radiator in the antenna 200 at the second parasitic resonance (eg, 0.97 GHz).

[0067] Fig.32 It is a schematic diagram of another foldable electronic device 200 provided in an embodiment of the present application.

[0068] Fig.33 yes Fig.32 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG.

[0069] Fig.34 yes Fig.32 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown. DETAILED DESCRIPTION

[0070] The following explains the terms that may appear in the embodiments of the present application.

[0071] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0072] When used in this application, “within the range of…”, unless it is separately specified that an end value is not included, it is assumed that both end values ​​of the range are included. For example, in the range of 1 to 5, the two values ​​1 and 5 are included.

[0073] Coupling: can be understood as direct coupling and / or indirect coupling, and "coupled connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the connection between different components in the circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an airless / non-contact manner. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by coupling between the gaps between two conductive parts to form an equivalent capacitor.

[0074] Component / device: includes at least one of lumped component / device and distributed component / device.

[0075] Lumped component / device: refers to the collective name for all components when the size of the component is much smaller than the wavelength relative to the circuit operating frequency. For the signal, regardless of any time, the component characteristics always remain fixed and are independent of frequency.

[0076] Distributed components / devices: Unlike lumped components, if the size of the component is similar to or larger than the wavelength relative to the circuit operating frequency, then when the signal passes through the component, the characteristics of each point of the component itself will vary due to changes in the signal. At this time, the component as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed component.

[0077] Capacitance: It can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitors; distributed capacitance (or distributed capacitance) refers to the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0078] Inductance: It can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductors; distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a certain length of conductive parts.

[0079] Radiator: It is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the "antenna" in a narrow sense is understood as a radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0080] The radiator may include a conductor with a specific shape and size, such as a linear or sheet shape, etc., and the present application does not limit the specific shape. In one embodiment, the linear radiator may be referred to as a linear antenna. In one embodiment, the linear radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the linear radiator may be implemented by a bracket conductor, and may also be referred to as a bracket antenna. In one embodiment, the linear radiator, or the radiator of the linear antenna, has a wire diameter (e.g., including thickness and width) much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of linear antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, and inverted F antennas (also known 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 feeding unit from the feeding end of the radiating branch. For example, an inverted-F antenna (IFA) can be regarded as a monopole antenna with a ground path added. The IFA antenna has a feeding point and a grounding point, and is called an inverted-F antenna because its side view is an inverted F shape. In one embodiment, the sheet radiator may include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also known as PIFA, Planar Inverted FAntenna). In one embodiment, the sheet radiator may be implemented by a planar conductor (such as a conductive sheet or a conductive coating, etc.). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet, etc. In one embodiment, the sheet radiator may include a conductive coating, such as a silver paste, etc. The shape of the sheet radiator includes a circle, a rectangle, a ring, etc., and the present application does not limit the specific shape. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator and a floor, wherein the dielectric substrate is arranged between the radiator and the floor.

[0081] The radiator may also include a slot or a slit formed on the conductor, for example, a closed or semi-closed slot or slit formed on a grounded conductor surface. In one embodiment, a slotted or slitted radiator may be referred to as a slot antenna or a slot antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slit of the slot antenna / slot antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, a radiator with a closed slot or slit may be referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or slit (e.g., an opening is added to a closed slot or slit) may be referred to as an open slot antenna. In some embodiments, the slot shape is a long strip. In some embodiments, the length of the slot is about half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the slot is about an integer multiple of the wavelength (e.g., one times the dielectric wavelength). In some embodiments, the slot can be fed by a transmission line connected across one or both sides thereof, thereby exciting a radio frequency electromagnetic field on the slot and radiating electromagnetic waves into space. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a conductive frame with both ends grounded, which can also be called a frame antenna; in this embodiment, it can be regarded as that the slot antenna or slot antenna includes a linear radiator, which is spaced apart from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slot. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a bracket conductor with both ends grounded, which can also be called a bracket antenna.

[0082] The feed circuit / feed structure is a combination of all components of an antenna for the purpose of receiving and transmitting radio frequency waves. In the case of a receiving antenna, the feed circuit can be considered as the part of the antenna from the first amplifier to the front-end transmitter. In a transmitting antenna, the feed circuit can be considered as the part after the last power amplifier. In some cases, the "feed circuit" is understood in a narrow sense as the RF chip, or the transmission path from the RF chip to the radiator or the feeding point on the transmission line. The feed circuit has the function of converting radio waves into electrical signals and sending them to the receiver component. Generally, it is considered to be the part of the antenna that converts radio waves into electrical signals and vice versa. The antenna should be designed with maximum power transfer possibility and efficiency in mind. To do this, the antenna feed impedance must be matched with the load resistance. The antenna feed impedance is a combination of resistance, capacitance and inductance. To ensure maximum power transfer conditions, the two impedances (load resistance and feed impedance) should be matched. Matching can be done by considering the frequency requirements and the design parameters of the antenna, such as gain, directivity and radiation efficiency.

[0083] End / point: The "end / point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / connection point of the antenna radiator cannot be narrowly understood as an end point or end portion that is physically disconnected from other radiators, but can also be considered as a point or a section on a continuous radiator. In one embodiment, the "end / point" may include a connection / coupling area on the antenna radiator that is coupled to other conductive structures. For example, the feed end / feeding point may be a coupling area on the antenna radiator that is coupled to a feed structure or a feed circuit (for example, an area facing a portion of the feed circuit). For another example, the ground end / grounding point may be a connection / coupling area on the antenna radiator that is coupled to a ground structure or a ground circuit.

[0084] Open end, closed end: In some embodiments, the open end and the closed end are, for example, relative to whether they are grounded. 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 conductors. The closed end is electrically connected to other conductors, and the open end is not electrically connected to other conductors. In one 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 one 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 conductors can be coupled and connected through the open end to transfer coupling energy (which can be understood as transferring current).

[0085] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end, etc., can be understood as a point with larger current on the radiator, or as a point with smaller electric field on the radiator. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by coupling electronic devices (for example, capacitors, inductors, etc.) through the closed end. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by opening a gap at or near the closed end (for example, a gap filled with insulating material).

[0086] In some embodiments, the "open end" can also be understood from the perspective of current distribution. The open end or suspended end, etc., can be understood as a point with smaller current on the radiator, or as a point with larger electric field on the radiator. In one embodiment, coupling electronic devices (for example, capacitors, inductors, etc.) through the open end can maintain the current distribution characteristics of the smaller current point / larger electric field point.

[0087] It should be understood that coupling the radiator end at a gap (from the perspective of the structure of the radiator, it is similar to a radiator at an opening of an open end or a suspended end) with electronic devices (for example, capacitors, inductors, etc.) can make the radiator end a point with larger current / smaller electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0088] Resonance / resonance frequency: The resonance frequency is also called the resonance frequency. The resonance frequency may refer to the frequency at which the imaginary part of the antenna input impedance is zero. The resonance frequency may have a frequency range, that is, the frequency range in which resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristic of the center frequency may be less than -20dB. It should be understood that, unless otherwise specified, the first resonance mentioned in this application for the antenna / radiator "generating the first resonance" should be the fundamental mode resonance generated by the antenna / radiator, or the lowest frequency resonance generated by the antenna / radiator.

[0089] Resonance frequency band / communication frequency band / working frequency band: Regardless of the type of antenna, it always works within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has a working frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the working frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the working frequency band of the antenna.

[0090] Electrical length: It can refer to the ratio of physical length (ie mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length can satisfy the following formula:

[0091]

[0092] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0093] Wavelength: or operating wavelength, which 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 frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, then the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "operating wavelength" can also refer to the wavelength corresponding to the non-center frequency of the resonant frequency or the operating frequency band.

[0094] It should be understood that the wavelength of the radiation signal in the air can be calculated as follows: (wavelength in air, or wavelength in vacuum) = speed of light / frequency, where frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3×108 m / s. The wavelength of the radiation signal in the medium can be calculated as follows: Among them, ε is the relative dielectric constant of the medium. The wavelength in the embodiments of the present application generally refers to the dielectric wavelength, which can be the dielectric wavelength corresponding to the center frequency of the resonant frequency, or the dielectric wavelength corresponding to the center frequency of the working frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, the wavelength can be the dielectric wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "dielectric wavelength" may also refer to the dielectric wavelength corresponding to the non-center frequency of the resonant frequency or the working frequency band. For ease of understanding, the dielectric wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one or more sides of the radiator.

[0095] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0096] Antenna radiation efficiency: refers to the ratio of the power radiated by the antenna into space (i.e. the power of the electromagnetic wave part that is effectively converted) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the 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 that measures the radiation ability of the antenna. Metal loss and dielectric loss are both factors that affect the radiation efficiency.

[0097] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between efficiency and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna.

[0098] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmit power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the radiation efficiency of the antenna.

[0099] Antenna return loss can be represented by the S11 parameter, which is one of the S parameters. S11 represents the reflection coefficient, which can characterize the antenna transmission efficiency. The S11 parameter is usually a negative number. The smaller the S11 parameter is, the smaller the antenna return loss is, and the less energy is reflected back by the antenna itself, which means that more energy actually enters the antenna, and the higher the antenna system efficiency is; the larger the S11 parameter is, the greater the antenna return loss is, and the lower the antenna system efficiency is.

[0100] It should be noted that in engineering, the S11 value is generally -6dB as the standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or that the antenna has good transmission efficiency.

[0101] Ground (GND): can refer to at least a part of any grounding layer, grounding plate, or grounding metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components, etc. "GND" can be used for grounding components in electronic devices. In one embodiment, "ground" can be a grounding layer of a circuit board of an electronic device, or a grounding plate formed by a frame of an electronic device, or a grounding metal layer formed by a metal film under a screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12 to 14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer, and a routing layer, and the routing layer and the grounding layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, 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 a circuit board; or electrically connected to a wiring layer and / or a ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0102] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material can be any 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 and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. It will be appreciated by those skilled in the art that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0103] Grounding: refers to coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, such as physical grounding (or physical ground) at a specific position on the frame through some structural parts of the middle frame. In one embodiment, grounding can be achieved through device grounding, such as grounding through devices such as capacitors / inductors / resistors connected in series or in parallel (or device ground).

[0104] The technical solution of the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0105] Figure 1 1 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application. The foldable electronic device 100 may be a mobile phone, a tablet computer, an e-reader, a laptop computer, a wearable device such as a watch, or other electronic device with a folding function. Figure 1 The illustrated embodiment is described by taking a foldable mobile phone as an example.

[0106] refer to Figure 1 The foldable electronic device 100 may include a flexible display screen 110, a first frame 121, a first cover 122, a second frame 123, a second cover 124, and a hinge 125. In some embodiments, the first frame 121, the first cover 122, the second frame 123, and the second cover 124 may form a first shell 126 and a second shell 127 that support the flexible display screen 110. In other embodiments, at least one of the first cover 122 and the second cover 124 may include a display screen.

[0107] Figure 1 The dot matrix pattern filled in the figure can schematically represent the flexible display screen 110. The flexible display screen 110 can have the characteristics of strong flexibility and bendability, and can provide users with a new interaction method based on the bendable characteristics. The display panel of the flexible display screen 110 can, for example, adopt any one of a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc., and the embodiments of the present application are not limited to this.

[0108] The flexible display screen 110 may 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 may be connected between the first display portion 111 and the second display portion 112.

[0109] The first frame 121 may surround the outer periphery of the first cover 122, and at least a portion of the first frame 121 may also surround the outer periphery of the first display portion 111. The first display portion 111 may be arranged parallel to and spaced from the first cover 122, and the first display portion 111 and the first cover 122 may be located on both sides of the first frame 121. The space between the first display portion 111 and the first cover 122 may be used to place components of the foldable electronic device 100, such as an antenna, a circuit board assembly, and the like.

[0110] The second frame 123 may surround the outer periphery of the second cover 124, and at least a portion of the second frame 123 may also surround the outer periphery of the second display portion 112. The second display portion 112 may be arranged in parallel and spaced apart from the second cover 124, and the second display portion 112 and the second cover 124 may be located on both sides of the second frame 123. The space between the second display portion 112 and the second cover 124 may be used to place components of the foldable electronic device 100, such as an antenna, a circuit board assembly, etc.

[0111] In one embodiment provided in the present application, the cover body and the frame may be two parts of the shell of the foldable electronic device 100, and the cover body and the frame may be connected, and the form of the connection may not belong to assembly methods such as snap-on, gluing, welding, riveting, clearance fit, etc. The connection relationship between the cover body and the frame is usually difficult to separate. In another embodiment provided in the present application, the cover body and the frame may be two different components. By assembling the cover body and the frame together, the shell of the foldable electronic device 100 can be formed.

[0112] The frame can at least partially serve as an antenna radiator to receive / transmit radio frequency signals, and there can be a gap between this portion of the frame serving as the radiator and other portions of the cover, thereby ensuring that the antenna radiator has a good radiation environment. In one embodiment, the cover can be provided with a gap at this portion of the frame serving as the radiator to facilitate the radiation of the antenna.

[0113] The antenna of the electronic device 100 can also be arranged in the frame. When the frame of the electronic device 100 is a non-conductive material, the antenna radiator can be located in the electronic device 100 and arranged along the frame. For example, the antenna radiator is arranged close to the frame to minimize the volume occupied by the antenna radiator and is closer to the outside of the electronic device 100 to achieve better signal transmission effect. It should be noted that the antenna radiator is arranged close to the frame means that the antenna radiator can be arranged close to the frame, or it can be arranged close to the frame, for example, there can be a certain small gap between the antenna radiator and the frame.

[0114] The antenna of the electronic device 100 may also be disposed in the housing, such as a bracket antenna, a millimeter wave antenna, etc. ( Figure 1). The clearance of the antenna disposed in the housing can be obtained by a slit / opening on any one of the cover, and / or the frame, and / or the display screen, or by a non-conductive gap / aperture formed between any of them, and the clearance setting of the antenna can ensure the radiation performance 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, and the antenna radiates signals to the external space through the non-conductive area. In one embodiment, the antenna can be in the form of an antenna based on a flexible printed circuit (FPC), an antenna based on laser direct structuring (LDS), or a microstrip disk antenna (MDA). In one embodiment, the antenna can also be a transparent structure embedded in the display screen of the electronic device 100, so that the antenna is a transparent antenna unit embedded in the display screen of the electronic device 100.

[0115] The foldable electronic device 100 may also include a printed circuit board PCB (not shown in the figure). The PCB is arranged in the cavity formed by the cover body. Among them, the PCB can use a flame retardant material (FR-4) dielectric board, a Rogers dielectric board, a mixed dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a flame retardant material grade, and the Rogers dielectric board is a high-frequency board. Electronic components, such as radio frequency chips, etc., are carried on the PCB17. In one embodiment, a metal layer can be provided on the printed circuit board PCB. The metal layer can be used for grounding the electronic components carried on the printed circuit board PCB, and can also be used for grounding other components, such as a bracket antenna, a frame antenna, etc. The metal layer can be called a floor, a grounding plate, or a grounding layer. In one embodiment, the metal layer can be formed by etching metal on the surface of any layer of the dielectric board in the PCB. In one embodiment, the metal layer for grounding can be provided on the printed circuit board PCB on one side close to the flexible display screen 110. In one embodiment, the edge of the PCB can be regarded as the edge of its grounding layer. The electronic device 100 can also have other floors / grounding plates / grounding layers, as described above, which will not be repeated here.

[0116] The rotating shaft 125 can be connected between the first housing 126 and the second housing 127. Under the action of the rotating shaft 125, the first housing 126 and the second housing 127 can be moved closer to each other or farther away from each other. Accordingly, the first display portion 111 of the flexible display screen 110 and the second display portion 112 of the flexible display screen 110 can be moved closer to each other or farther away from each other, so that the flexible display screen 110 can be folded or unfolded.

[0117] In one example, the rotating shaft 125 may include, for example, a main shaft, a first connecting component, and a second connecting component. The first connecting component may be fixed to the first cover 122, and the second connecting component may be fixed to the second cover 124. The first connecting component and the second connecting component may rotate relative to the main shaft. The mutual movement of the first connecting component and the second connecting component may drive the mutual movement of the first shell 126 and the second shell 127, thereby realizing the opening and closing function of the foldable electronic device 100.

[0118] Figure 1 The foldable electronic device 100 is currently in the unfolded state. In the unfolded state, the angle between the first housing 126 and the second housing 127 can be approximately 180°. The flexible display screen 110 can be in the following state: Figure 1 Shown in expanded state.

[0119] Figure 2 A possible folding state of the foldable electronic device 100 is shown. Figure 2 The foldable electronic device 100 is shown in an outward folded state (the outward folded state may be simply referred to as an external folded state). Figure 2 The folded outward state shown can be, for example, a left-right folded outward state or an up-down folded outward state. Figure 1 and Figure 2 , describing a possible folding state of the foldable electronic device 100.

[0120] In the embodiment of the present application, the foldable electronic device 100 being in a folded state may 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 may be approximately parallel, spaced 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, and 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 portion 111, the first shell 126, the second shell 127, and the second display portion 112 are stacked in sequence. Similarly, the first display portion 111 and the second display portion 112 may be approximately parallel, spaced from each other, and the spacing distance between the first cover 122 and the second cover 124 is less than the spacing distance between the first display portion 111 and the second display portion 112. At this time, the first display portion 111 and the second display portion 112 may be regarded as being located on different planes.

[0121] Combination Figure 1 and Figure 2When the foldable electronic device 100 is in the outward folded state, the first cover 122 and the second cover 124 can be close to each other, and the first display portion 111 and the second display portion 112 can be close to each other. The first display portion 111, the second display portion 112 and the foldable display portion 123 can form a housing area for accommodating the first cover 122, the second cover 124, and the rotating shaft 125. In other words, the first cover 122, the second cover 124, and the rotating shaft 125 can be accommodated in the interval space between the first display portion 111 and the second display portion 112.

[0122] It should be understood that the foldable electronic device 100 can be folded inward (the inward folding state can be referred to as the inward folding state). When the foldable electronic device 100 is in the inward folding state, the first cover 122 and the second cover 124 can be close to each other, and the first display portion 111 and the second display portion 112 can be close to each other. The first cover 122, the second cover 124 and the rotating shaft 125 can form a housing area for accommodating the first display portion 111, the second display portion 112, and the foldable display portion 123. In other words, the first display portion 111, the second display portion 112, and the foldable display portion 123 can be accommodated in the interval space between the first cover 122 and the second cover 124.

[0123] The foldable electronic device 100 can switch between a folded state and an unfolded state. When the foldable electronic device 100 is in the folded state, the occupied space of the foldable electronic device 100 is relatively small; 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 viewing range of the user.

[0124] The foldable electronic device 100 may further include a third housing 128 and a rotating shaft 129. Figure 3 As shown. 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 each other or away from each other. As the number of foldable parts of the foldable electronic device 100 increases, the occupied space of the foldable electronic device 100 can be further reduced in the folded state while maintaining the same screen size in the unfolded state.

[0125] And in Figure 3 In the foldable electronic device 100 shown, since it has three foldable parts (a first shell 126, a second shell 127 and a third shell 128), the foldable electronic device 100 has three forms: 1. unfolded state; 2. folded state; 3. partially unfolded state.

[0126] 1. If Figure 3, which is a 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 may be approximately 180°. The flexible display screen 110 may be in the unfolded state.

[0127] 2. If Figure 4 , which is a possible folding state (three-folding state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 rotate along the rotation axis 125, and the second housing 127 and the third housing 128 rotate along the rotation axis 129, so that the bending degree of the foldable electronic device 100 reaches the maximum. 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.

[0128] 3. If Figure 5 , which is a possible partially unfolded state (two-folded state) of the foldable electronic device 100. In the partially unfolded state, the angle between the first shell 126 and the second shell 127 can be about 180°, and the second shell 127 and the third shell 128 rotate along the rotation axis 129, so that the third shell 128 is close to the second shell 127. At this time, the first shell 126 and the second shell 127 are regarded as being located on the same plane, and the second shell 127 and the third shell 128 can be regarded as being located on different planes. In another possible partially unfolded state, the angle between the third shell 128 and the second shell 127 can be about 180°, and the first shell 126 and the second shell 127 rotate along the rotation axis 125, so that the first shell 126 is close to the second shell 127.

[0129] Figure 1 Only some components of the electronic device 100 are schematically shown, and the actual shapes, sizes and structures of these components are not limited to the following. Figure 1 limited.

[0130] It should be understood that in the embodiments of the present application, the surface where the display screen of the electronic device is located can be considered as the front side, the surface where the back cover is located can be considered as the back side, and the surface where the frame is located can be considered as the side side.

[0131] It should be understood that in the embodiments of the present application, when the user is holding the electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side. It should be understood that in the embodiments of the present application, when the user is holding the electronic device (usually vertically and facing the screen), the electronic device is located at a position having a top, a bottom, a left side, and a right side.

[0132] First, by Figures 6 to 9 To introduce this application, four antenna modes will be involved. Among them, Figure 6This is a schematic diagram of the common mode structure of an antenna provided in the present application and the corresponding current and electric field distribution. Figure 7 This is a schematic diagram of the structure of the differential mode of another antenna provided in the present application and the corresponding current and electric field distribution. Figure 6 and Figure 7 The antenna radiator is open at both ends, and its common mode mode and differential mode can be called line common mode mode and line differential mode mode respectively. Figure 8 This is a schematic diagram of the common mode structure of an antenna provided in the present application and the corresponding distribution of current, electric field and magnetic current. Fig. 9 It is a schematic diagram of the structure of the differential mode of another antenna provided in the present application and the corresponding distribution of current, electric field and magnetic current. Figure 8 and Fig. 9 Both ends of the antenna radiator are grounded, and its common mode mode and differential mode can be called slot common mode mode and slot differential mode mode, respectively.

[0133] It should be understood that the "common mode" or "CM mode" in this application includes a line common mode and a slot common mode, and the "differential mode mode" or "DM mode" in this application includes a line differential mode and a slot differential mode, which can be specifically determined according to the structure of the antenna.

[0134] It should be understood that the "common-differential mode" or "CM-DM mode" in this application refers to the line common mode mode and the line differential mode mode generated on the same radiator, or refers to the slot common mode mode and the slot differential mode mode generated on the same radiator, which can be specifically determined according to the structure of the antenna.

[0135] 1. Common mode (CM) mode

[0136] Figure 6 (a) in the figure shows that the radiator of the antenna 40 is open at both ends and connected to a feeding circuit (not shown) at the middle position 41. In one 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 a feeding line 42. It should be understood that symmetrical feeding can be understood as one end of the feeding circuit is connected to the radiator and the other end is grounded, wherein the connection point between the feeding circuit and the radiator (feeding point) is located at the center of the radiator, and the center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or an area within a certain range near the above midpoint).

[0137] The middle position 41 of the antenna 40 may be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiator. For example, the connection between the feed line 42 and the antenna 40 covers the middle position 41 .

[0138] Figure 6(b) in FIG. 4 shows the current and electric field distribution of the antenna 40. Figure 6 As shown in (b), the current is distributed in opposite directions on both sides of the middle position 41, for example, symmetrically; the electric field is distributed in the same direction on both sides of the middle position 41. Figure 6 As shown in (b) in FIG. 4 , the current at the feeder 42 is distributed in the same direction. Based on the current distribution in the feeder 42, Figure 6 The feeding shown in (a) in FIG. 4 is called line CM feeding. Based on the reverse distribution of the current on both sides of the connection between the radiator and the feeding line 42, Figure 6 The antenna mode shown in (b) in the figure can be called a linear CM mode (it can also be simply referred to as a CM mode. For example, for a linear antenna, the CM mode refers to a linear CM mode). Figure 6 The current and electric field shown in (b) can be called the current and electric field of the line CM mode, respectively.

[0139] The current is stronger at the middle position 41 of the antenna 40 (the current is stronger near the middle position 41 of the antenna 40), and weaker at both ends of the antenna 40, such as Figure 6 As shown in (b) in FIG. 4 , the electric field is weak at the middle position 41 of the antenna 40 and is strong at both ends of the antenna 40 .

[0140] 2. Line differential mode (DM) mode

[0141] like Figure 7 (a) in the figure shows that the left and right ends of the two radiators of the antenna 50 are open ends, and the feeding circuit is connected at the middle position 51. In one embodiment, the feeding form of the antenna 50 adopts anti-symmetrical feed. One end of the feeding circuit is connected to one of the radiators through the feeding line 52, and the other end of the feeding circuit is connected to the other radiator through the feeding line 52. The middle position 51 can be the geometric center of the antenna 50, or the gap formed between the radiators.

[0142] It should be understood that the "center antisymmetric feeding" mentioned in this application can be understood as that the positive and negative poles of the feeding unit are respectively connected to two connection points near the above-mentioned midpoint of the radiator. In one embodiment, the positive and negative poles of the feeding unit output signals with the same amplitude and opposite phases, for example, the phase difference is 180°±10°.

[0143] Figure 7 (b) in FIG. 5 shows the current and electric field distribution of the antenna 50. Figure 7 As shown in (b) of FIG. 5 , the current is distributed in the same direction on both sides of the middle position 51 of the antenna 50, for example, in an anti-symmetrical distribution; and the electric field is distributed in opposite directions on both sides of the middle position 51. Figure 7As shown in (b) in FIG. 5 , the current at the feeder 52 presents a reverse distribution. Based on the reverse distribution of the current at the feeder 52, Figure 7 The feeding shown in (a) in FIG. 5 is called line DM feeding. Based on the fact that the current is distributed in the same direction on both sides of the connection between the radiator and the feeding line 52, Figure 7 The antenna mode shown in (b) can be called a linear DM mode (can also be simply referred to as a DM mode. For example, for a linear antenna, the DM mode refers to a linear DM mode). Figure 7 The current and electric field shown in (b) can be called the current and electric field of the line DM mode, respectively.

[0144] The current is stronger at the middle position 51 of the antenna 50 (the current is stronger near the middle position 51 of the antenna 50), and weaker at both ends of the antenna 50, such as Figure 7 As shown in (b) in FIG. 5 , the electric field is weak at the middle position 51 of the antenna 50 and is strong at both ends of the linear antenna 50 .

[0145] It should be understood that the antenna radiator can be understood as a metal structure that generates radiation, and the number of the metal structure can be one, such as Figure 6 As shown, or, it can be two pieces, such as Figure 7 As shown, it can be adjusted according to actual design or production needs. For example, for the line CM mode, it can also be Figure 7 As shown, two radiators are used, and the two ends of the two radiators are arranged opposite to each other and separated by a gap. A symmetrical feeding method is adopted at the two ends close to each other. For example, the same feed source signal is fed to the two ends close to each other, and the same Figure 6 The antenna structure shown in FIG. 1 has a similar effect. Correspondingly, for the line DM mode, it can also be Figure 6 As shown in the figure, a radiator is used, two feeding points are set at the middle position of the radiator and an antisymmetric feeding method is adopted. For example, if two symmetrical feeding points on the radiator are fed with signals with the same amplitude and opposite phases respectively, the same power supply as in the embodiment of the present invention can be obtained. Figure 7 The antenna structure shown has a similar effect.

[0146] 3. Line CM-DM mode

[0147] Above Figure 6 and Figure 7 The figures show the line CM mode and line DM mode respectively generated by using different feeding methods when both ends of the radiator are open.

[0148] When the antenna is fed in an asymmetric way (the feeding point is offset from the middle of the radiator, including side feeding or offset feeding), or the grounding point of the radiator (where it is coupled with the floor) is asymmetric (the grounding point is offset from the middle of the radiator), the antenna can simultaneously generate the first resonance and the second resonance, corresponding 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 are as follows: Figure 6 The second resonance corresponds to the line DM mode, and the current and electric field distribution are shown in (b). Figure 7 As shown in (b) in .

[0149] 4. Slot CM mode

[0150] Figure 8 The radiator of the antenna 60 shown in (a) has a hollow slot or gap 61, or the radiator of the antenna 60 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 61. The slot 61 can be formed by grooving the floor. An opening 62 is provided on one side of the slot 61, and the opening 62 can be specifically opened in the middle position of the side. The middle position of the side of the slot 61 can be, for example, the geometric midpoint of the antenna 60, or the midpoint of the electrical length of the radiator, for example, the area where the opening 62 is opened on the radiator covers the middle position of the side. The opening 62 can be connected to the feeding circuit, and antisymmetric feeding can be used. It should be understood that antisymmetric feeding can be understood as the positive and negative poles of the feeding circuit are respectively connected to the two ends of the radiator. The signals output by the positive and negative poles of the feeding circuit have the same amplitude and opposite phases, for example, the phase difference is 180°±10°.

[0151] Figure 8 (b) in FIG. 6 shows the current, electric field, and magnetic current distribution of the antenna 60. Figure 8 As shown in (b) of FIG. 1 , the current on the conductor (such as the floor, and / or the radiator 60) around the slot 61 is distributed in the same direction around the slot 61, the electric field is distributed in opposite directions on both sides of the middle position of the slot 61, and the magnetic current is distributed in opposite directions on both sides of the middle position of the slot 61. Figure 8 As shown in (b), the electric field at the opening 62 (e.g., the feeding point) is in the same direction, and the magnetic current at the opening 62 (e.g., the feeding point) is in the same direction. Based on the same direction of the magnetic current at the opening 62 (the feeding point), Figure 8 The feeding shown in (a) of FIG. 6 is referred to as slot CM feeding. Based on the current being distributed in the same direction (e.g., anti-symmetric distribution) on the radiators on both sides of the opening 62, or based on the current being distributed in the same direction around the slot 61 on the conductors around the slot 61, Figure 8 The antenna mode shown in (b) can be called a slot CM mode (also referred to as a CM mode for short. For example, for a slot antenna, the CM mode refers to a slot CM mode). Figure 8 The electric field, current, and magnetic current distributions shown in (b) can be called the electric field, current, and magnetic current of the slot CM mode.

[0152] The magnetic field is weak in the middle of the antenna 60 and strong at both ends of the antenna 60. The electric field is strong in the middle of the antenna 60 (the largest point of the electric field is located near the middle of the antenna 60) and weak at both ends of the antenna 60, such as Figure 8 As shown in (b) in .

[0153] 5. Slot DM mode

[0154] like Fig. 9 The radiator of the antenna 70 shown in (a) has a hollow slot or gap 72, or the radiator of the antenna 70 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 72. The slot 72 can be formed by making a slot on the floor. The middle position 71 of the slot 72 is connected to the feeding circuit, and symmetrical feeding is adopted. It should be understood that symmetrical feeding can be understood as one end of the feeding circuit is connected to the radiator and the other end is grounded, wherein the connection point between the feeding circuit and the radiator (feeding point) is located at the center of the radiator, and the center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or an area within a certain range near the above midpoint). The middle position of one side of the slot 72 is connected to the positive pole of the feeding circuit, and the middle position of the other side of the slot 72 is connected to the negative pole of the feeding circuit. The middle position of the side of the slot 72 can be, for example, the middle position of the slot antenna 60 / the middle position of the ground, such as the geometric midpoint of the slot antenna, or the midpoint of the electrical length of the radiator, such as the connection between the feeding circuit and the radiator covering the middle position 51 of the side.

[0155] Fig. 9 (b) in FIG. 7 shows the current, electric field, and magnetic current distribution of the antenna 70. Fig. 9 As shown in (b) of FIG. 1 , on the conductor (such as the floor, and / or the radiator 60) around the slot 72, the current is distributed around the slot 72, and is distributed in opposite directions on both sides of the middle position of the slot 72, the electric field is distributed in the same direction on both sides of the middle position 71, and the magnetic current is distributed in the same direction on both sides of the middle position 71. The magnetic current at the feeding circuit is distributed in opposite directions (not shown). Based on the magnetic current at the feeding circuit being distributed in opposite directions, Fig. 9 The feeding shown in (a) in FIG. 1 may be referred to as slot DM feeding. Based on the reverse distribution (e.g., symmetrical distribution) of the current on both sides of the connection between the feeding circuit and the radiator, or based on the reverse distribution (e.g., symmetrical distribution) of the current around the slot 71, Fig. 9 The antenna mode shown in (b) can be called a slot DM mode (can also be referred to as a DM mode for short, for example, for a slot antenna, the DM mode refers to a slot DM mode). Fig. 9 The distribution of electric field, current and magnetic current shown in (b) can be called the electric field, current and magnetic current of the slot DM mode.

[0156] The current is weaker in the middle of the antenna 70 and stronger at both ends of the antenna 70. The electric field is stronger in the middle of the antenna 70 (the largest point of the electric field is located near the middle of the antenna 60) and weaker at both ends of the slot antenna 70, such as Fig. 9 As shown in (b) in .

[0157] It should be understood that the radiator of the antenna can be understood as a metal structure that generates radiation (for example, a part of the floor), which may include an opening, such as Figure 8 As shown, or, it can also be a complete ring, such as Fig. 9 As shown, it can be adjusted according to actual design or production needs. For example, for the slot CM mode, it can also be Fig. 9 As shown in the figure, a complete annular radiator is used, two feeding points are set at the middle position of the radiator on one side of the slot 61, and an anti-symmetric feeding method is adopted. For example, signals with the same amplitude and opposite phases are fed into the two ends of the original opening position, and the same Figure 8 The antenna structure shown in FIG. 1 has a similar effect. Correspondingly, for the slot DM mode, it can also be Figure 8 The radiator with an opening is shown in the figure, and a symmetrical feeding method is adopted at both ends of the opening. For example, the same feed source signal is fed into both ends of the radiator on both sides of the opening, and the same Fig. 9 The antenna structure shown has a similar effect.

[0158] 6. Slot CM-DM mode.

[0159] Above Figure 8 and Fig. 9 It is shown that the slot structure uses different feeding methods to generate slot CM mode and slot DM mode respectively.

[0160] When the antenna is fed in an asymmetric way (the feeding point deviates from the middle position, including side feeding or offset feeding), or the opening of one side of the slot is asymmetric (the opening deviates from the middle position of the side), the antenna can simultaneously generate the first resonance and the second resonance, corresponding to the slot CM mode and the slot DM mode, respectively. For example, the first resonance corresponds to the slot CM mode, and the current, electric field, and magnetic current distribution are as follows: Figure 8 The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distribution are shown in (b). Fig. 9 As shown in (b) in .

[0161] Since the above antenna structures can generate two working modes (the electric field is symmetrically distributed or antisymmetrically distributed) in which the electric field is orthogonal (the product of the electric field in the far field is zero (integrated orthogonal)), the isolation between the two working modes of this antenna structure is good, and it can be applied to multi-input multi-output (MIMO) antenna systems in electronic devices.

[0162] At the same time, when the two antenna structures respectively operate in two working modes (the electric field is symmetrically distributed or antisymmetrically distributed) in which the electric field is orthogonal (the product of the electric field in the far field is zero (integrated orthogonal)), there is also good isolation between the two antenna structures, and they can be used as sub-units in the MIMO antenna system in electronic devices.

[0163] It should be understood that the two antenna structures can be understood as antenna structures into which signals are fed by the first feeding circuit and the second feeding circuit respectively. The first feeding circuit and the second feeding circuit are different. In the electronic device, the first feeding circuit and the second feeding circuit can be different radio frequency channels in a radio frequency chip (RF IC).

[0164] An embodiment of the present application provides a foldable electronic device, including an antenna. The foldable electronic device includes a first frame and a second frame that can be folded. The antenna uses a portion of the frame of the first frame as a main radiation branch, and a portion of the frame of the second frame as a parasitic branch. The parasitic branch is electrically connected to an electronic component. When the foldable electronic device is in a folded state, the parasitic branch is used to generate a first parasitic resonance and a second parasitic resonance, thereby expanding the working bandwidth of the antenna and improving the communication performance of the foldable electronic device.

[0165] Fig.10 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0166] As shown in FIG. 10 , the foldable electronic device 100 may include a first housing 201 , a second housing 202 , and a floor 101 .

[0167] The first housing 201 includes a first frame 210 , at least a portion of which is spaced apart from the floor 101 . The second housing 202 includes a second frame 220 , at least a portion of which is spaced apart from the floor 101 .

[0168] The first frame 210 includes a first position 211 and a second position 212. The first frame 210 defines a first gap at the first position 211, and the first frame 210 is coupled to the floor 101 at the second position 212.

[0169] It should be understood that in the embodiments of the present application, the coupling connection is only illustrated by taking electrical connection as an example. In actual production or practice, it can also be achieved by indirect coupling. For the sake of simplicity of discussion, it will not be described one by one.

[0170] The second frame 220 includes a third position 221 and a fourth position 222. The second frame 220 defines a second gap at the third position 221, and the second frame 220 is coupled to the floor 101 at the fourth position 222.

[0171] The foldable electronic device 100 may further include a first rotation shaft 203. The first rotation shaft 203 is located between the first housing 201 and the second housing 202, and the first rotation shaft 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.

[0172] It should be understandable that Fig.10 In the foldable electronic device 100 shown, the first rotating shaft 203 is directly connected to the first shell 201 and the second shell 202 respectively, so that the first shell 201 and the second shell 202 can rotate relative to each other. In addition, "the first rotating shaft 203 is rotatably connected to the first shell 201 and the second shell 202 respectively" includes the situation that the first rotating shaft 203 can be rotatably connected to the first or second shell through one or more second rotating shafts and one or more intermediate shells. For example, in one embodiment, the foldable electronic device 100 may also include a first rotating shaft and a second rotating shaft, and one or more intermediate shells located between the first rotating shaft and the second rotating shaft. The first rotating shaft is located between the first shell 201 and the intermediate shell, and the first rotating shaft is rotatably connected to the first shell 201 and the intermediate shell respectively, so that the first shell 201 and the intermediate shell can rotate relative to each other. The second rotating shaft is located between the intermediate shell and the second shell 202, and the first rotating shaft 203 is rotatably connected to the intermediate shell and the second shell 202 respectively, so that the intermediate shell and the second shell 202 can rotate relative to each other.

[0173] The foldable electronic device 100 may further include an antenna 200 . The antenna 200 includes a first radiator 230 , a second radiator 240 , a first feeding circuit 251 , and a first electronic element 252 .

[0174] The first radiator 230 is a conductive portion of the first frame 210 between the first position 211 and the second position 212. The first radiator 230 includes a first feeding point 231, and the first feeding circuit 251 is coupled to the first feeding point 231.

[0175] The second radiator 240 is a conductive portion of the second frame 220 between the third position 221 and the fourth position 222. The length of the second radiator 240 is greater than or equal to two fifths of the length of the first radiator 230.

[0176] In one embodiment, the second radiator 240 includes a first connection point 241, a first end of the first electronic component 252 is coupled to the first connection point 241, and a second end of the first electronic component 252 is coupled to the floor 101. Fig.10 As shown in (a) in .

[0177] Alternatively, in one embodiment, the second radiator 240 includes a first connection point 241 and a second electrical connection point 242, and a fourth gap is provided on the second frame 220 between the first connection point 241 and the second electrical connection point 242. The first end of the first electronic component 252 is coupled to the first connection point 241, and the second end of the first electronic component 252 is coupled to the second connection point 242. Fig.10 As shown in (b) in .

[0178] When the foldable electronic device 100 is in a folded state, the first radiator 230 and the second radiator 240 at least partially overlap along a first direction, where the first direction is a thickness direction of the foldable electronic device 100 , for example, a z direction.

[0179] The first radiator 230 is used to generate a first resonance. The second radiator 240 is used to generate a first parasitic resonance. The second radiator 240 and the first electronic component 252 are used to generate a second parasitic resonance.

[0180] It should be understood that the second radiator 240 and the first electronic component 252 are used to generate the second parasitic resonance, which can be understood as the entire second radiator 240 and the first electronic component 252 are both used to generate the second resonance, and the electrical parameters of the second radiator 240 (for example, electrical length) and the electrical parameters of the first electronic component 252 (for example, equivalent capacitance value or equivalent inductance value) directly affect the second parasitic resonance (for example, the frequency of the resonance point). In a comparative embodiment, the first electronic component 252 is not provided, and the resonance point of the second parasitic resonance will shift the target frequency band beyond the range of the first threshold, and the first threshold may be greater than or equal to 200 MHz.

[0181] The first radiator 230 is used to generate the first resonance, and the second radiator 240 is used to generate the first parasitic resonance, which can be understood as the entire radiator is used to generate the resonance. At the same time, it should not be understood that other components (such as the first electronic component 252) are not used to affect the resonance.

[0182] In one embodiment, "the second radiator 240 is used to generate the first parasitic resonance" and "the second radiator 240 and the first electronic component 252 are used to generate the second parasitic resonance" can be understood as a whole technical solution, wherein the presence or absence of the first electronic component 252 has a greater impact on the second parasitic resonance than on the first parasitic resonance. Relative to the solution of the present application, in the solution without the first electronic component 252, the frequency difference shifted by the resonance point of the second parasitic resonance is greater than the frequency difference shifted by the first parasitic resonance. For example, the frequency difference shifted by the resonance point of the second parasitic resonance is more than 2 times, or more than 5 times, the frequency difference shifted by the first parasitic resonance.

[0183] It should be understood that the technical solution provided by the embodiment of the present application is that when the foldable electronic device 100 is in a folded state, the first radiator 230 in the antenna 200 acts as a main radiation branch (a branch into which the signal is fed from the feeding point), and the second radiator 240 acts as a parasitic branch (a branch that couples the signal by coupling the main radiation branch). The second radiator 240 can generate a first parasitic resonance and a second parasitic resonance by coupling with the first radiator 230. The resonant frequency of the first parasitic resonance can be determined by the length of the second radiator 240, and the resonant frequency of the second parasitic resonance can be determined by the length of the second radiator 240 and the electrical parameters of the first electronic component 252. In one embodiment, the first parasitic resonance and the second parasitic resonance are brought closer to the first resonance by the length of the second radiator 240, the length of the second radiator 240, and the electrical parameters of the first electronic component 252. The first resonance, the first parasitic resonance, and the second parasitic resonance can be used to expand the working bandwidth of the antenna 200 and jointly support an operating frequency band of the foldable electronic device 100.

[0184] exist Fig.10 In the illustrated embodiment, the first parasitic resonance is a resonance generated when the second radiator operates in the three-quarter mode, and the second parasitic resonance is a resonance generated when the second radiator operates in the one-quarter mode.

[0185] Among them, an operating frequency band of the foldable electronic device 100 includes a frequency range, such as a low frequency band (LB) (698MHz-960MHz), a middle frequency band (MB) (1710MHz-2170MHz) or a high frequency band (HB) (2300MHz-2690MHz) in a cellular network. Taking an operating frequency band of the foldable electronic device 100 as LB (698MHz-960MHz) as an example, the operating frequency band may include multiple communication frequency bands within the frequency range, such as B5, B8, etc., which can be understood accordingly in the embodiments of the present application.

[0186] For the sake of simplicity, in the embodiment of the present application, only the first end of the main radiation branch is an open end and the second end is a grounded end (the first frame 210 has a gap at the first position 211, and the first frame 210 is coupled to the floor 101 at the second position 212) is used as an example for explanation. It should be understood that the embodiment of the present application does not limit the distance structure of the main radiation branch. In actual applications, the first end of the main radiation branch is an open end and the second end is an open end (the first frame 210 has a gap at the first position 211, and the first frame 210 has a gap at the second position 212). Fig.10As shown in (c) in the figure, or, the first end of the main radiation branch is an open end, and the second end is an open end (the first frame 210 is coupled to the floor 101 at the first position 211, and the first frame 210 is coupled to the floor 101 at the second position 212), as shown in Fig.10 As shown in (d) in .

[0187] Fig.11 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0188] Fig.11 The foldable electronic device 100 is shown with Fig.10 The foldable electronic device 100 shown is different only in the structure of the second radiator 240 in the antenna 200.

[0189] The second frame 220 has a second slit at the third position 221, and the second frame 220 has a third slit at the fourth position 222. Fig.11 The second frame 220 is coupled to the floor 101 at both the third position 221 and the fourth position 222. Fig.11 As shown in (b) in .

[0190] The length of the second radiator 240 is greater than or equal to three-half of the length of the first radiator 230 .

[0191] It should be understood that the technical solution provided by the embodiment of the present application is that when the foldable electronic device 100 is in a folded state, the first radiator 230 in the antenna 200 acts as a main radiation branch (a branch into which the signal is fed from the feeding point), and the second radiator 240 acts as a parasitic branch (a branch that couples the signal by coupling the main radiation branch). The second radiator 240 can generate a first parasitic resonance and a second parasitic resonance by coupling with the first radiator 230. The first resonance, the first parasitic resonance, and the second parasitic resonance can be used to expand the working bandwidth of the antenna 200 and jointly support an operating frequency band of the foldable electronic device 100.

[0192] exist Fig.11 In the illustrated embodiment, the first parasitic resonance is the resonance generated when the second radiator operates in the differential mode, and the second parasitic resonance is the resonance generated when the second radiator operates in the common mode. Based on the coupling of the second frame 220 with the floor at both the third position 221 and the fourth position 222, the first parasitic resonance and the second parasitic resonance may correspond to the slot CM-DM mode in the above embodiment. Based on the second frame 220 having a second slit at the third position 221 and the second frame 220 having a third slit at the fourth position 222, the first parasitic resonance and the second parasitic resonance may correspond to the line CM-DM mode in the above embodiment.

[0193] Fig.12is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0194] Fig.12 The foldable electronic device 100 is shown with Fig.10 or Fig.11 The difference between the foldable electronic device 100 shown is that the first electronic element 252 in the antenna 200 is arranged at a different position and in Fig.12 The structure of the second radiator 240 is not limited in the antenna 200 shown.

[0195] The second radiator 240 includes a first connection point 241, a first end of the first electronic element 252 is coupled to the first connection point 241, and a second end of the first electronic element 252 is coupled to the floor 101. Fig.12 As shown in (a) in FIG. 2 . At the resonance point of the first parasitic resonance, the second radiator 240 includes an electric field zero point region, the electric field zero point region includes the electric field zero point of the second radiator 240 at the resonance point of the first parasitic resonance, and the distance between the point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm. In one embodiment, the first connection point 241 is located in the above-mentioned electric field zero point region.

[0196] Alternatively, the second radiator 240 includes a first connection point 241 and a second electrical connection point 242, and a fourth gap is provided on the second frame 220 between the first connection point 241 and the second electrical connection point 242. The first end of the first electronic component 252 is coupled to the first connection point 241, and the second end of the first electronic component 252 is coupled to the second connection point 242. Fig.12 As shown in (b) in FIG. 1 . At the resonance point of the first parasitic resonance, the second radiator 240 includes a current zero point region, the current zero point region includes the current zero point of the second radiator 240 at the resonance point of the first parasitic resonance, and the distance between the point in the current zero point region and the current zero point is less than or equal to 5 mm. In one embodiment, the first connection point 241 and the second electrical connection point 242 are located in the above-mentioned current zero point region.

[0197] It should be understood that the technical solution provided in the embodiment of the present application, based on different boundary conditions of the second radiator 240 (the second frame 220 is coupled with the floor at the third position 221 or the fourth position 222 or a gap is opened), can enable the second radiator 240 to generate different first parasitic resonances and second parasitic resonances (for example, line CM-DM mode or slot CM-DM mode, etc.) through coupling with the first radiator 230. The first resonance, the first parasitic resonance, and the second parasitic resonance can be used to expand the working bandwidth of the antenna 200 and jointly support an operating frequency band of the foldable electronic device 100.

[0198] At the same time, for different working modes, at the resonance point of the first parasitic resonance, the position of the current zero point region or the electric field zero point region on the second radiator 240 is different.

[0199] In one embodiment, when the working mode of the second radiator 240 is a quarter-wavelength mode (the second frame 220 has a gap at the third position 221 and is coupled to the floor at the fourth position 222), the current on the second radiator 240 is in the same direction, and the second radiator 240 does not have a current zero point area or an electric field zero point area.

[0200] In one embodiment, when the operating mode of the second radiator 240 is a quarter-wavelength mode (the second frame 220 has a gap at the third position 221, and the fourth position 222 is coupled to the floor), the distance between the electric field zero point and the third position 221 is approximately one-third of the length of the second radiator 240 or the electric field zero point area, and the distance between the current zero point and the fourth position 222 is approximately one-third of the length of the second radiator 240 or the electric field zero point area.

[0201] In one embodiment, when the working mode of the second radiator 240 is the line DM mode / line CM mode (the second frame 220 has a gap at the third position 221 and a gap at the fourth position 222 ), the electric field zero point is located in the central area of ​​the second radiator 240 .

[0202] In one embodiment, when the working mode of the second radiator 240 is the slot DM mode / slot CM mode (the second frame 220 has a gap at the third position 221 and the fourth position 222 is coupled to the floor), the current zero point is located in the center area of ​​the second radiator 240 .

[0203] Fig.13 is a schematic diagram of a foldable electronic device 100 provided in an embodiment of the present application.

[0204] like Fig.13As shown, the first frame 210 has a first slit at the first position 211, and the first frame 210 is coupled to the floor 101 at the second position 212. The first end of the first radiator 230 is an open end, and the second end is a ground end. The second frame 220 has a second slit at the third position 221, and the second frame 220 is coupled to the floor 101 at the fourth position 222. The first end of the second radiator 240 is an open end, and the second end is a ground end. The length of the second radiator 240 (the conductive part between the third position 221 and the fourth position 222) is greater than or equal to two-fifths of the length of the first radiator 230 (the length of the conductive part between the first position 211 and the second position 212). In one embodiment, the width of the first slit is greater than or equal to 0.1 mm and less than or equal to 2 mm. It should be understood that the width of the slits opened on the frame in the embodiment of the present application can be within the above range.

[0205] A first end of the first electronic element 252 is coupled to the first connection point 241 , and a second end of the first electronic element 252 is grounded.

[0206] In one embodiment, a second feeding point may be further provided on the second radiator 240. When the foldable electronic device 100 is in the unfolded state, the second radiator 240 may be fed with an electrical signal by the second feeding point and may serve as a main radiation branch. At the same time, in one embodiment, when the foldable electronic device 100 is in the folded state, the second radiator 240 may be fed with an electrical signal by the second feeding point as a parasitic branch in the antenna 200 and also as a main radiation branch of other antennas, and the embodiment of the present application does not limit this.

[0207] In one embodiment, the first connection point 241 may be located in an electric field zero point region of the second radiator at a resonance point of the first parasitic resonance.

[0208] It should be understood that the electric field zero point can be understood as the electric field is reversed on both sides of the position of the electric field zero point generated by the second radiator 240 when the electric signal is fed into the first feeding point 231. The electric field zero point corresponds to the large current point (the large electric field point corresponds to the current zero point), and the electric field zero point area can be understood as the area within a certain range from the electric field zero point or the current large point. For example, the electric field zero point area can be understood as the area within 5mm from the electric field zero point or the current large point. Correspondingly, the current large point area can be understood as the area within a certain range from the electric field zero point or the current large point.

[0209] It should be understood that the electric field zero point (large current point) generated by the second radiator included in the above-mentioned electric field zero point region can be understood as the electric field zero point included in the current and electric field distribution corresponding to the first parasitic resonance generated by the second radiator 240. It can also be understood as the electric field zero point included in the current and electric field distribution corresponding to the highest frequency resonance generated by the second radiator 240 when the first electronic component 252 is not set. In one embodiment, the electric field zero point (large current point) generated by the second radiator included in the above-mentioned electric field zero point region can be understood as the electric field zero point included in the current and electric field distribution corresponding to the highest order mode of the second radiator 240.

[0210] When the second radiator 240 generates a second parasitic resonance, since the first electronic component 252 is electrically connected between the second radiator 240 and the floor, an electric field zero point (a point with larger current) can be generated in the area near the first connection point 241, thereby increasing the frequency of the second parasitic resonance and bringing it closer to the first parasitic resonance, so that the first resonance, the first parasitic resonance and the second parasitic resonance can expand the working bandwidth of the antenna 200.

[0211] It should be understood that the two resonances described in the embodiments of the present application are close, which can be understood as the resonance points of the two resonances are within a certain frequency range. For example, the first parasitic resonance and the first resonance are close, which can be understood as the difference in frequency between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200MHz, the frequency of the resonance point of the first parasitic resonance can be higher than the resonance point of the first resonance, or the frequency of the resonance point of the first parasitic resonance can be lower than the resonance point of the first resonance.

[0212] When the first connection point 241 is located in the electric field zero point region and the second radiator 240 generates the first parasitic resonance, the first electronic component 252 has little effect on the first parasitic resonance because there is an electric field zero point near the first connection point 241 .

[0213] It should be understood that the first electronic component 252 has little effect on the first parasitic resonance. It can be understood that when the equivalent capacitance value or the equivalent inductance value of the first electronic component 252 changes, or when the first electronic component 252 is not set, the frequency of the resonance point of the first parasitic resonance is shifted by a small amplitude, for example, less than 50 MHz or less than 5% of the frequency of the resonance point.

[0214] In one embodiment, the first electronic component 252 may be a capacitor. The equivalent capacitance of the first electronic component 252 is greater than 10 pF. In one embodiment, the first electronic component 252 may be an inductor. The equivalent inductance of the first electronic component 252 is less than 5 nH.

[0215] It should be understood that the above equivalent capacitance value or equivalent inductance value can be realized by a lumped device or a distributed structure equivalent capacitance or inductance. In one embodiment, the first electronic element 252 and the first connection point can also be resonantly switched by a tunable device.

[0216] In one embodiment, the electrical length of the second radiator 240 is three quarters of the first wavelength, where the first wavelength is the wavelength corresponding to the first parasitic resonance.

[0217] It should be understood that the wavelength provided in the embodiments of the present application can be understood as a vacuum wavelength. Since there is a corresponding relationship between the vacuum wavelength and the medium wavelength, the corresponding wavelength can be determined based on the vacuum wavelength.

[0218] Since the electrical length of the second radiator 240 is three quarters of the first wavelength, the operating mode of the second radiator 240 may include a quarter wavelength mode and a three quarter wavelength mode, the second parasitic resonance is generated by the quarter wavelength mode, and the first parasitic resonance is generated by the three quarter wavelength mode.

[0219] In one embodiment, at the resonance point of the first parasitic resonance, the currents on the second radiator 240 on both sides of the first connection point 241 are in the same direction.

[0220] In one embodiment, at the resonance point of the second parasitic resonance, the current on the second radiator 240 is reversed on both sides of the first connection point 241 .

[0221] It should be understood that for the second parasitic resonance (quarter mode), when the first electronic component 252 is not provided, the current on the second radiator 240 is in the same direction. When the first electronic component 252 is provided, an electric field zero point may be generated in the vicinity of the first connection point 241, and the current on the second radiator 240 is in the opposite direction on both sides of the first connection point 241. Since the first electronic component 252 has little effect on the first parasitic resonance (three-quarter mode), the current on the second radiator 240 does not change, and the current on the second radiator 240 is in the same direction on both sides of the first connection point 241.

[0222] In one embodiment, the length of the second radiator 240 is greater than or equal to two fifths of the length of the first radiator 230 .

[0223] In one embodiment, the length of the second radiator 240 is greater than or equal to three times the length of the first radiator 230 .

[0224] In one embodiment, the length of the second radiator 240 is greater than or equal to two-fifths and less than or equal to two-sevenths of the first radiator 230, so that the first parasitic resonance is close to the first resonance (the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz), thereby expanding the working bandwidth of the antenna 200.

[0225] In one embodiment, the length of the second border between the first connection point 241 and the third position 221 is less than or equal to five twelfths (one third + 25%) of the length of the second radiator between the third position 221 and the fourth position 222, and is greater than or equal to one fourth (one third - 25%) of the length of the second border between the third position 221 and the fourth position 222, so that the second parasitic resonance is close to the first resonance (the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz), thereby expanding the operating bandwidth of the antenna 200.

[0226] When the second radiator 240 resonates, an electric field zero point (large current point) can be generated on the second radiator 240 (the current zero point included in the current and electric field distribution corresponding to the three-quarter wavelength mode). The first electronic component 252 is grounded in the electric field zero point area, and the quarter wavelength mode generates an electric field zero point near the first connection point 241, so that it becomes a new three-quarter wavelength mode. In addition, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted using the first electronic component 252. At the same time, since the first connection point 241 is located in the electric field zero point area of ​​the three-quarter wavelength mode, the first electronic component 252 is electrically connected to the floor in this area, and the boundary conditions are not changed, and the original three-quarter wavelength mode is little affected. Therefore, the antenna 200 can include two three-quarter wavelength modes to expand the working bandwidth of the antenna.

[0227] In one embodiment, the length of the first radiator between the first feeding point 231 and the first position 211 is less than half of the length of the first radiator between the first position 211 and the second position 212 .

[0228] It should be understood that the first radiator 230 and the first feeding circuit 251 may form an IFA antenna structure. Fig.13 In the antenna 200 shown, only the main radiation branch (first radiator 230) is used as an example to form the IFA. In actual design or production, the antenna structure formed by the main radiation branch can be adjusted.

[0229] In one embodiment, the first radiator 230 can be used to generate the first resonance. In one embodiment, the first radiator 230 can operate in a quarter wavelength mode. The electrical length of the first radiator is one quarter of the second wavelength, and the second wavelength is the wavelength corresponding to the first resonance.

[0230] In one embodiment, the first resonance, the first parasitic resonance, and the second parasitic resonance together form an operating frequency band to expand the operating bandwidth of the antenna.

[0231] It should be understood that the first resonance, the first parasitic resonance and the second parasitic resonance together form a working frequency band, which can be understood as the first parasitic resonance, the second parasitic resonance and the first resonance are close to each other, and together form a resonance frequency band. For example, the frequency of the resonance point of the first resonance is between the frequency of the resonance point of the first parasitic resonance and the frequency of the resonance point of the second parasitic resonance, or the frequency of the resonance point of the first resonance is lower than or higher than the frequency of the resonance point of the first parasitic resonance and the frequency of the resonance point of the second parasitic resonance. In one embodiment, it can also be understood that two adjacent resonances of the first resonance, the first parasitic resonance and the second parasitic resonance are connected in the S11 diagram, and the S11 of the connected area is less than -4dB to form a resonance frequency band.

[0232] Fig.14 and Fig.15 yes Fig.13 The simulation result diagram of the antenna 200 is shown. Fig.14 yes Fig.13 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG. Fig.15 yes Fig.13 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0233] It should be understood that, for the sake of simplicity of discussion, the present application embodiment only takes the first electronic component as an inductor with an inductance value of 0.2 nH as an example for description.

[0234] like Fig.14 , which shows S parameter simulation results of the antenna 200 under different conditions.

[0235] Case 1: When the foldable electronic device is in a folded state and the second radiator is not provided, the antenna resonates only by the first radiator at around 0.9 GHz.

[0236] Case 2: When the foldable electronic device is in a folded state and the first electronic element is not set (the first connection point is not grounded), the antenna can generate two resonances near 0.9 GHz and near 0.95 GHz. The resonance near 0.95 GHz (the first parasitic resonance) can be generated by the second radiator.

[0237] Case 3: When the foldable electronic device is in the folded state and the first electronic component is set, the antenna can generate three resonances near 0.85 GHz, near 0.9 GHz, and near 0.95 GHz. Two resonances near 0.85 GHz (second parasitic resonance) and near 0.95 GHz (first parasitic resonance) can be generated by the second radiator. At the same time, the first electronic component does not affect the first parasitic resonance.

[0238] like Fig.15 , which shows the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different situations. When the first electronic component is set, the radiation efficiency and system efficiency of the antenna are effectively improved due to the introduction of the second parasitic resonance near 0.85 GHz.

[0239] Fig.16 and Fig.17 yes Fig.13 The electric field and current distribution diagram of the area near the second radiator in the antenna 200 is shown. Fig.16 yes Fig.13 The diagram shows the electric field and current distribution in the vicinity of the second radiator in the antenna 200 at the second parasitic resonance (eg, 0.85 GHz). Fig.17 yes Fig.13 The diagram shows the electric field and current distribution in the vicinity of the second radiator in the antenna 200 at the first parasitic resonance (eg, 0.96 GHz).

[0240] like Fig.16 As shown, the second radiator is grounded at the first connection point through the first electronic component, and an electric field zero point (a point with large current) can be generated near the first connection point. Since an electric field zero point (a point with large current) is generated near the first connection point, the current on the second radiator is reversed on both sides of the first connection point, and the working mode corresponding to the second parasitic resonance of the second radiator changes from a quarter-wavelength mode to a new three-quarter-wavelength mode.

[0241] like Fig.17 As shown, the second radiator is grounded through the first electronic component at the first connection point. The first connection point is located in the electric field zero point region of the first parasitic resonance. The first electronic component is electrically connected to the floor in this region, which does not change the boundary conditions. The original three-quarter wavelength mode is unchanged. On both sides of the first connection point, the currents on the second radiator are in the same direction.

[0242] Fig.18 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0243] like Fig.18As shown, the first frame 210 has a first slit at a first position 211 and is grounded at a second position 212. The first end of the first radiator 230 is an open end, and the second end is a grounded end. The length of the first radiator between the first feeding point 231 and the first position 211 is less than half of the length of the first radiator between the first position 211 and the second position 212.

[0244] It should be understood that the first radiator 210 and the first feeding circuit 251 can form a left-hand antenna structure, and the left-hand antenna can be, for example, an antenna that conforms to a composite right and left hand (CRLH) transmission line structure. Fig.13 The difference between the antenna 200 shown is only that the antenna structure formed by the main radiation branch (the first radiator 230) is different.

[0245] In one embodiment, the first radiator 230 can be used to generate the first resonance. The electrical length of the first radiator is one quarter of the second wavelength, and the second wavelength is the wavelength corresponding to the first resonance.

[0246] In one embodiment, the first slit at the first position 211 is aligned with the second slit at the third position 221 in a first direction (eg, z direction). In this embodiment of the present application, alignment can be understood as at least partially overlapping in the first direction (eg, z direction).

[0247] It should be understood that when the first slot and the second slot are aligned in the first direction, when the first feeding point 231 feeds an electrical signal, the second slot can couple more energy through the electric field at the first slot, thereby improving the resonant radiation characteristics generated by the second radiator.

[0248] Fig.19 and Fig. 20 yes Fig.18 The simulation result diagram of the antenna 200 is shown. Fig.19 yes Fig.18 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG. Fig. 20 yes Fig.18 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0249] It should be understood that, for the sake of simplicity of discussion, the present application embodiment only takes the first electronic component as a capacitor with a capacitance value of 25 pF as an example for explanation.

[0250] like Fig.19 , which shows S parameter simulation results of the antenna 200 under different conditions.

[0251] Case 1: When the foldable electronic device is in a folded state and the second radiator is not provided, the antenna resonates only by the first radiator at around 0.87 GHz.

[0252] Case 2: When the foldable electronic device is in a folded state and the first electronic element is not set (the first connection point is not grounded), the antenna can generate two resonances near 0.86 GHz and near 0.94 GHz. The resonance near 0.94 GHz (the first parasitic resonance) can be generated by the second radiator.

[0253] Case 3: When the foldable electronic device is in the folded state and the first electronic component is set, the antenna can generate three resonances near 0.86 GHz, near 0.94 GHz, and near 0.98 GHz. Two resonances near 0.98 GHz (near the second parasitic resonance) and near 0.94 GHz (the first parasitic resonance) can be generated by the second radiator. At the same time, the first electronic component does not affect the first parasitic resonance.

[0254] It should be understood that Fig.18 The antenna shown is Fig.13 The difference between the antennas shown is only that the antenna structure formed by the main radiating branch (first radiator) is different. Therefore, an electronic component is connected in series between the parasitic branch (second radiator) and the floor to expand the working bandwidth of the antenna and is not affected by the antenna structure formed by the main radiating branch.

[0255] Meanwhile, when the first electronic component is different, the frequency of the resonance point of the second parasitic resonance is different and may be smaller than the frequency of the resonance point of the first parasitic resonance (eg Fig.14 ), or it may be greater than the frequency of the resonance point of the first parasitic resonance (as shown in Fig.19 shown).

[0256] like Fig. 20 , which shows the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different situations. When the first electronic component is set, the second parasitic resonance is introduced near 0.98 GHz, which effectively improves the system efficiency and working bandwidth of the antenna.

[0257] Fig.21 and Fig. 22 yes Fig.18 The electric field and current distribution diagram of the area near the second radiator in the antenna 200 is shown. Fig.21 yes Fig.18 The diagram shows the electric field and current distribution in the vicinity of the second radiator in the antenna 200 at the first parasitic resonance (eg, 0.94 GHz). Fig. 22 yes Fig.18The diagram shows the electric field and current distribution in the vicinity of the first radiator in the antenna 200 at the second parasitic resonance (eg, 0.98 GHz).

[0258] like Fig.21 As shown, the second radiator is grounded through the first electronic component at the first connection point. The first connection point is located in the electric field zero point region of the first parasitic resonance. The first electronic component is electrically connected to the floor in this region, which does not change the boundary conditions. The original three-quarter wavelength mode does not change. On both sides of the first connection point, the current on the second radiator is in the same direction. The electric field is mainly concentrated near the second frame between the first connection point and the fourth position.

[0259] like Fig. 22 As shown, the second radiator is grounded at the first connection point through the first electronic component, and an electric field zero point (a point with large current) can be generated near the first connection point. Since an electric field zero point (a point with large current) is generated near the first connection point, the current on the second radiator is reversed on both sides of the first connection point, and the working mode corresponding to the second parasitic resonance of the second radiator changes from a quarter-wavelength mode to a new three-quarter-wavelength mode. The electric field is mainly concentrated near the second frame between the first connection point and the third position.

[0260] Fig.23 It is a schematic diagram of another foldable electronic device 200 provided in an embodiment of the present application.

[0261] like Fig.23 As shown, the second frame 220 has a second slit at the third position 221 and a third slit at the fourth position 222. The first end of the second radiator 240 is an open end, and the second end is an open end.

[0262] It should be understood that Fig.23 The antenna 200 is shown with Fig.13 The difference between the antenna 200 shown is only in the structure of the parasitic branch (second radiator 240). Fig.13 In the antenna 200 shown, the first end of the second radiator 240 is an open end, and the second end is a ground end.

[0263] In one embodiment, the first radiator 230 can be used to generate the first resonance. The electrical length of the first radiator is one quarter of the second wavelength, and the second wavelength is the wavelength corresponding to the first resonance.

[0264] In one embodiment, the electrical length of the second radiator 240 is half of the first wavelength, and the first wavelength is the wavelength corresponding to the first parasitic resonance.

[0265] It should be understood that the wavelength provided in the embodiments of the present application can be understood as a vacuum wavelength. Since there is a corresponding relationship between the vacuum wavelength and the medium wavelength, the corresponding wavelength can be determined based on the vacuum wavelength.

[0266] Since both ends of the second radiator 240 are open ends, the operation mode of the second radiator 240 may include a line CM mode and a line DM mode. The second parasitic resonance is generated by the CM mode, and the first parasitic resonance is generated by the DM mode.

[0267] In one embodiment, the length of the second radiator 240 is greater than or equal to three-half of the length of the first radiator 230 .

[0268] In one embodiment, the length of the second radiator 240 is greater than or equal to twice the length of the first radiator 230 .

[0269] In one embodiment, the length of the second radiator 240 is greater than or equal to three-half of the length of the first radiator 230 and less than or equal to two-fifths of the length of the first radiator 230, so that the first parasitic resonance is close to the first resonance (the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz), thereby expanding the working bandwidth of the antenna 200.

[0270] In one embodiment, the first connection point 241 is located in the center area of ​​the second radiator 240 .

[0271] It should be understood that the central area can be understood as a local area within a certain range from the geometric center of the second radiator 240 (the physical length of the second radiator 240 on both sides of the center is the same) or the electrical length center (the electrical length of the second radiator 240 on both sides of the center is the same), for example, an area within 5 mm from the center.

[0272] When the second radiator 240 resonates, the second radiator 240 can generate an electric field zero point (large current point) in the central area (the current zero point included in the current and electric field distribution corresponding to the line DM mode), and the central area of ​​the second radiator 240 is the electric field zero point area. By grounding the first electronic component 252 in the electric field zero point area, a new line CM mode can be generated. In addition, the frequency of the resonance generated by the new line CM mode can be adjusted by using the first electronic component 252. At the same time, since the first connection point 241 is located in the electric field zero point area of ​​the line DM mode, the first electronic component 252 is electrically connected to the floor in this area, and the boundary conditions are not changed, and the original line DM mode is little affected. Therefore, the antenna 200 can include a line DM mode and a line CM mode to expand the working bandwidth of the antenna.

[0273] It should be understood that the first electronic component 252 has little effect on the line DM mode. It can be understood that when the equivalent capacitance value or the equivalent inductance value of the first electronic component 252 changes, or when the first electronic component 252 is not set, the frequency of the resonance point of the first parasitic resonance generated by the line DM mode shifts by a small amplitude, for example, less than 50 MHz or less than 5% of the frequency of the resonance point.

[0274] In one embodiment, at the resonance point of the first parasitic resonance, the currents on the second radiator 240 on both sides of the first connection point 241 are in the same direction.

[0275] In one embodiment, at the resonance point of the second parasitic resonance, the current on the second radiator 240 is reversed on both sides of the first connection point 241 .

[0276] It should be understood that when the first electronic element 252 is not provided, no reverse current is generated on the second radiator 240, and no second parasitic resonance (CM mode) is generated. When the first electronic element 252 is provided, an electric field zero point may be generated in the vicinity of the first connection point 241, and the current on the second radiator 240 is reversed on both sides of the first connection point 241, thereby generating a second parasitic resonance (CM mode). Since the first electronic element 252 has little effect on the first parasitic resonance (DM mode), the current on the second radiator 240 does not change, and the current on the second radiator 240 is in the same direction on both sides of the first connection point 241.

[0277] In one embodiment, the first slit at the first position 211 is aligned with the third slit at the fourth position 222 in a first direction (eg, z-direction).

[0278] It should be understood that when the first slot and the third slot partially overlap in the first direction, when the first feeding point 231 feeds an electrical signal, the third slot can couple more energy through the electric field at the first slot, thereby enhancing the resonant radiation characteristics generated by the second radiator.

[0279] Fig.24 and Fig.25 yes Fig.23 The simulation result diagram of the antenna 200 is shown. Fig.24 yes Fig.23 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG. Fig.25 yes Fig.23 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0280] like Fig.24 , which shows S parameter simulation results of the antenna 200 under different conditions.

[0281] Case 1: When the foldable electronic device is in a folded state and the second radiator is not provided, the antenna resonates only by the first radiator at around 0.9 GHz.

[0282] Case 2: When the foldable electronic device is in a folded state and the first electronic element is not set (the first connection point is not grounded), the antenna can generate two resonances near 0.9 GHz and near 0.95 GHz. The resonance near 0.95 GHz (the first parasitic resonance) can be generated by the second radiator.

[0283] Case 3: When the foldable electronic device is in the folded state and the first electronic component is set, the antenna can generate three resonances near 0.86 GHz, near 0.9 GHz, and near 0.95 GHz. Two resonances near 0.86 GHz (near the second parasitic resonance) and near 0.95 GHz (first parasitic resonance) can be generated by the second radiator. At the same time, the first electronic component does not affect the first parasitic resonance.

[0284] like Fig.25 , which shows the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different situations. When the first electronic component is set, the radiation efficiency and system efficiency of the antenna are effectively improved due to the introduction of the second parasitic resonance near 0.86 GHz.

[0285] Fig.26 is a schematic diagram of another foldable electronic device 100 provided in an embodiment of the present application.

[0286] like Fig.26 As shown, the second radiator 240 includes a first connection point 241 and a second electrical connection point 242, and a fourth gap is provided on the second frame 220 between the first connection point 241 and the second electrical connection point 242. The first end of the first electronic component 252 is coupled to the first connection point 241, and the second end of the first electronic component 252 is coupled to the second connection point 242.

[0287] It should be understood that Fig.26 The antenna structure 200 is shown with Fig.18 The difference between the antenna 200 shown is only that the connection method between the first electronic component 252 and the second radiator 240 is different.

[0288] At the same time, the first electronic component 252 can be used to adjust the equivalent capacitance of the fourth gap, thereby adjusting the radiation characteristics of the second parasitic resonance (for example, the frequency of the resonance point). In one embodiment, the distance between the first connection point 241 and the second electrical connection point 242 and the fourth gap is less than or equal to 5mm. Among them, the distance between the first connection point 241 and the second electrical connection point 242 and the fourth gap can be understood as the minimum distance between the first connection point 241 and the second electrical connection point 242 and the conductors on both sides of the fourth gap. When the first electronic component 252 is electrically connected to the first connection point 241 and the second electrical connection point 242 through a metal shrapnel, the distance between the fourth gap can be understood as the minimum distance between the center of the part where the metal shrapnel contacts the connection point and the conductors on both sides of the fourth gap.

[0289] In one embodiment, the first connection point 241 and the second connection point 242 (the fourth gap) can be located in the current zero point region of the second radiator at the resonance point of the first parasitic resonance, so that the frequency of the second parasitic resonance is increased and approached to the first parasitic resonance, so that the first resonance, the first parasitic resonance and the second parasitic resonance can expand the working bandwidth of the antenna 200.

[0290] It should be understood that the current zero point can be understood as the current reversed on both sides of the current zero point position generated by the second radiator when the electric signal is fed into the first feeding point 231. The current zero point corresponds to the large electric field point (the current large point corresponds to the electric field zero point), and the current zero point area can be understood as the area within a certain range from the electric field zero point or the electric field large point. For example, the current zero point area can be understood as the area within 5mm from the current zero point or the electric field large point. Correspondingly, the electric field large point area can be understood as the area within a certain range from the current zero point or the electric field large point.

[0291] In one embodiment, the current zero point (large electric field point) generated by the second radiator included in the above-mentioned current zero point region can be understood as the current zero point included in the current and electric field distribution corresponding to the first parasitic resonance generated by the second radiator 240. It can also be understood as the current zero point included in the current and electric field distribution corresponding to the highest frequency resonance generated by the second radiator 240 when the first electronic component 252 is not set. In one embodiment, the current zero point (large electric field point) generated by the second radiator included in the above-mentioned current zero point region can be understood as the current zero point included in the current and electric field distribution corresponding to the highest order mode of the second radiator 240.

[0292] In one embodiment, the length of the second radiator 240 is greater than or equal to two fifths of the length of the first radiator 230 .

[0293] In one embodiment, the length of the second radiator 240 is greater than or equal to three times the length of the first radiator 230 .

[0294] In one embodiment, the length of the second radiator 240 is greater than or equal to two-fifths and less than or equal to two-sevenths of the first radiator 230, so that the first parasitic resonance is close to the first resonance (the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz), thereby expanding the working bandwidth of the antenna 200.

[0295] It should be understood that by providing the fourth slit on the second radiator 240 , the radiation aperture of the second radiator 240 can be increased, thereby improving the radiation characteristics of the antenna 200 .

[0296] In one embodiment, the second frame 220 has a second slit at the third position 221 and is grounded at the fourth position 222. The first end of the second radiator 240 is an open end, and the second end is a grounded end.

[0297] In one embodiment, the length of the second radiator between the fourth position 222 and the first connection point 241 (the first connection point 241 is located between the second connection point 242 and the fourth position 222) is less than or equal to five twelfths (one third + 25%) of the length of the second radiator between the third position 221 and the fourth position 222, and is greater than or equal to one fourth (one third - 25%) of the length of the second border between the third position 221 and the fourth position 222, so that the second parasitic resonance is close to the first resonance (the frequency difference between the resonance point of the second parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz), thereby expanding the operating bandwidth of the antenna 200.

[0298] It should be understood that when the second radiator 240 resonates, a large electric field point (current zero point) can be generated on the second radiator 240 (the current zero point included in the current and electric field distribution corresponding to the three-quarter wavelength mode). A fourth slot is set in the area of ​​the large electric field point, and the quarter-wavelength mode generates a large electric field point near the fourth slot, so that it becomes a new three-quarter wavelength mode. In addition, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted by using the first electronic component 252. At the same time, since the fourth slot is located in the area of ​​the large electric field point of the three-quarter wavelength mode, setting the fourth slot in this area does not change the boundary conditions, and the original three-quarter wavelength mode is little affected. Therefore, the antenna 200 can include two three-quarter wavelength modes to expand the working bandwidth of the antenna.

[0299] It should be understood that the fourth gap has little effect on the three-quarter wavelength mode. It can be understood that when the equivalent capacitance value or the equivalent inductance value of the first electronic component 252 changes, or when the first electronic component 252 and the fourth gap are not set, the frequency of the resonance point of the resonance (first parasitic resonance) generated by the three-quarter wavelength mode is shifted by a small amplitude, for example, less than 50 MHz or less than 5% of the frequency of the resonance point.

[0300] In one embodiment, at the resonance point of the first parasitic resonance, the electric field between the second radiator 240 and the floor is in the same direction on both sides of the fourth slot.

[0301] In one embodiment, at the resonance point of the second parasitic resonance, the electric field between the second radiator 240 and the floor is opposite on both sides of the fourth slot.

[0302] It should be understood that for the second parasitic resonance (quarter mode), when the fourth gap is not provided, the electric field between the second radiator 240 and the floor is in the same direction. When the first electronic component 252 is provided, a larger electric field may be generated in the area near the fourth gap, and the electric field between the second radiator 240 and the floor is in the opposite direction on both sides of the fourth gap. Since the fourth gap has little effect on the first parasitic resonance (three-quarter mode), the electric field between the second radiator 240 and the floor does not change, and the electric field between the second radiator 240 and the floor is in the same direction on both sides of the first connection point 241.

[0303] In one embodiment, the width of the fourth gap between the first connection point 241 and the second electrical connection point 242 is greater than or equal to 0.1 mm and less than or equal to 2 mm.

[0304] In one embodiment, the first electronic component 252 may be a capacitor or an inductor. When the first electronic component 252 is a capacitor, its equivalent capacitance value is less than 1 pF.

[0305] It should be understood that the first electronic component 252 can be implemented by a distributed device or a lumped device. In one embodiment, when the first electronic component 252 is a capacitor, it can be implemented by a cross-shaped structure formed by the conductors on both sides of the fourth gap extending into the electronic device, such as Fig. 27 In one embodiment, when the first electronic component 252 is an inductor, the metal member electrically connected between the first connection point 241 and the second connection point 242 can be equivalent to an inductor, such as Fig. 27 As shown in (b) in .

[0306] In one embodiment, the first slit at the first position 211 is aligned with the second slit at the third position 221 in a first direction (eg, z direction). In one embodiment, the first slit at the first position 211 is aligned with the fourth slit in a first direction (eg, z direction).

[0307] It should be understood that when the first slot and the second slot / the fourth slot partially overlap in the first direction, when the first feeding point 231 feeds an electrical signal, the second slot / the fourth slot can couple more energy through the electric field at the first slot, thereby enhancing the resonant radiation characteristics generated by the second radiator.

[0308] Fig.28 and Fig.29 yes Fig.26 The simulation result diagram of the antenna 200 is shown. Fig.28 yes Fig.26 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG. Fig.29 yes Fig.26 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0309] like Fig.28 , which shows S parameter simulation results of the antenna 200 under different conditions.

[0310] Case 1: When the foldable electronic device is in a folded state and the second radiator is not provided, the antenna resonates only by the first radiator at around 0.87 GHz.

[0311] Case 2: When the foldable electronic device is in a folded state and the first electronic component is not provided (the fourth gap is not provided), the antenna can generate two resonances near 0.86 GHz and near 0.94 GHz. The resonance near 0.94 GHz (the first parasitic resonance) can be generated by the second radiator.

[0312] Case 3: When the foldable electronic device is in the folded state and the first electronic component is set, the antenna can generate three resonances near 0.86 GHz, near 0.91 GHz, and near 0.97 GHz. Two resonances near 0.97 GHz (near the second parasitic resonance) and near 0.91 GHz (the first parasitic resonance) can be generated by the second radiator. At the same time, the first electronic component does not affect the first parasitic resonance.

[0313] like Fig.29 , which shows the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different situations. When the first electronic component is set, the second parasitic resonance is introduced near 0.97 GHz, which effectively improves the system efficiency and working bandwidth of the antenna.

[0314] Fig.30 and Fig.31 24 is a schematic diagram of the electric field distribution in the vicinity of the second radiator in the antenna 200. Fig.30 yes Fig.26 The diagram shows the electric field distribution in the vicinity of the second radiator in the antenna 200 at the first parasitic resonance (eg, 0.91 GHz). Fig.31 yes Fig.26 The diagram shows the electric field distribution in the vicinity of the first radiator in the antenna 200 at the second parasitic resonance (eg, 0.97 GHz).

[0315] like Fig.30As shown, a fourth gap is provided between the first connection point and the second connection point of the second radiator, and the first electronic component is electrically connected between the first connection point and the second connection point. The fourth gap is located in the area where the electric field of the first parasitic resonance is large. The fourth gap is provided in this area, and the boundary conditions are not changed. The original three-quarter wavelength mode is not changed. On both sides of the fourth gap, the electric field between the second radiator and the floor is in the same direction. The electric field is mainly concentrated near the second frame between the fourth gap and the fourth position.

[0316] like Fig.31 As shown, a fourth gap is set between the first connection point and the second connection point of the second radiator, and the first electronic component is electrically connected between the first connection point and the second connection point. A large electric field point (current zero point) can be generated near the fourth gap. Since a large electric field point (current zero point) is generated near the fourth gap, the electric field between the second radiator and the floor is reversed on both sides of the fourth gap, and the working mode corresponding to the second parasitic resonance of the second radiator changes from a quarter-wavelength mode to a new three-quarter-wavelength mode. The electric field is mainly concentrated near the second frame between the fourth gap and the third position.

[0317] Fig.32 It is a schematic diagram of another foldable electronic device 200 provided in an embodiment of the present application.

[0318] like Fig.32 As shown, the second frame 220 is grounded at the third position 221 and grounded at the fourth position 222. The first end of the second radiator 240 is a grounded end, and the second end is a grounded end. The second radiator 240 includes a first connection point 241 and a second electrical connection point 242, and a fourth gap is provided on the second frame 220 between the first connection point 241 and the second electrical connection point 242. The first end of the first electronic component 252 is coupled to the first connection point 241, and the second end of the first electronic component 252 is coupled to the second connection point 242.

[0319] Should understand, should understand, Fig.32 The antenna 200 is shown with Fig.26 The difference between the antenna 200 shown is only in the structure of the parasitic branch (second radiator 240). Fig. 22 In the antenna 200 shown in FIG. 1 , the first end of the second radiator 240 is an open end, and the second end is a ground end. The second radiator 240 forms a linear antenna structure. Fig.32 In the antenna structure shown, the second radiator 240 forms a slot antenna structure.

[0320] In one embodiment, the electrical length of the second radiator 240 is half of the first wavelength, and the first wavelength is the wavelength corresponding to the first parasitic resonance.

[0321] It should be understood that the wavelength provided in the embodiments of the present application can be understood as a vacuum wavelength. Since there is a corresponding relationship between the vacuum wavelength and the medium wavelength, the corresponding wavelength can be determined based on the vacuum wavelength.

[0322] In one embodiment, the length of the second radiator 240 is greater than or equal to three-half of the length of the first radiator 230 .

[0323] In one embodiment, the length of the second radiator 240 is greater than or equal to twice the length of the first radiator 230 .

[0324] In one embodiment, the length of the second radiator 240 is greater than or equal to three-half of the length of the first radiator 230 and less than or equal to two-fifths of the length of the first radiator 230, so that the first parasitic resonance is close to the first resonance (the frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz), thereby expanding the working bandwidth of the antenna 200.

[0325] It should be understood that by providing the fourth slit on the second radiator 240 , the radiation aperture of the second radiator 240 can be increased, thereby improving the radiation characteristics of the antenna 200 .

[0326] Since the electrical length of the second radiator 240 is half of the first wavelength and both ends are grounded, the working mode of the second radiator 240 can include the slot CM mode and the slot DM mode in the above embodiment, the above second parasitic resonance is generated by the slot CM mode, and the first parasitic resonance is generated by the slot DM mode.

[0327] In one embodiment, the first connection point 241 and the second electrical connection point 242 (fourth slit) may be located in a central region of the second radiator 240 .

[0328] When the second radiator 240 resonates, an electric field high point (current zero point) can be generated on the second radiator 240 (the current zero point included in the current and electric field distribution corresponding to the slot DM mode). The fourth slit opened in the electric field high point area can generate a new slot CM mode. In addition, the frequency of the resonance generated by the new slot CM mode can be adjusted by using the first electronic component 252. At the same time, since the fourth slit opened is located in the electric field high point area of ​​the slot DM mode, opening the fourth slit in this area does not change the boundary conditions, and the original DM mode is little affected. Therefore, the antenna 200 can include a slot DM mode and a slot CM mode to expand the working bandwidth of the antenna.

[0329] It should be understood that the fourth gap has little effect on the DM mode, which can be understood as, when the equivalent capacitance value or the equivalent inductance value of the first electronic component 252 changes, or when the first electronic component 252 and the fourth gap are not set, the frequency of the resonance point of the first parasitic resonance generated by the slot DM mode is shifted by a small amplitude, for example, less than 50 MHz or less than 5% of the frequency of the resonance point.

[0330] In one embodiment, at the resonance point of the first parasitic resonance, the electric field between the second radiator 240 and the floor is in the same direction on both sides of the fourth slot.

[0331] In one embodiment, at the resonance point of the second parasitic resonance, the electric field between the second radiator 240 and the floor is opposite on both sides of the fourth slot.

[0332] It should be understood that for the second parasitic resonance (CM mode), when the fourth gap is not provided, the electric field between the second radiator 240 and the floor is in the same direction. When the first electronic component 252 is provided, a larger electric field may be generated in the vicinity of the fourth gap, and the electric field between the second radiator 240 and the floor is in the opposite direction on both sides of the fourth gap. Since the fourth gap has little effect on the first parasitic resonance (DM mode), the electric field between the second radiator 240 and the floor does not change, and the electric field between the second radiator 240 and the floor is in the same direction on both sides of the first connection point 241.

[0333] In one embodiment, the first slit at the first position 211 at least partially overlaps with the opened fourth slit in the first direction (eg, z-direction).

[0334] It should be understood that when the first slot and the fourth slot partially overlap in the first direction, when the first feeding point 231 feeds an electrical signal, the fourth slot can couple more energy through the electric field at the first slot, thereby enhancing the resonant radiation characteristics generated by the second radiator.

[0335] Fig.33 and Fig.34 yes Fig.32 The simulation result diagram of the antenna 200 is shown. Fig.33 yes Fig.32 FIG. 4 is a diagram of S-parameter simulation results of the antenna 200 shown in FIG. Fig.34 yes Fig.32 The simulation results of the radiation efficiency and system efficiency of the antenna 200 are shown.

[0336] like Fig.33 , which shows S parameter simulation results of the antenna 200 under different conditions.

[0337] Case 1: When the foldable electronic device is in a folded state and the second radiator is not provided, the antenna resonates only by the first radiator at around 0.9 GHz.

[0338] Case 2: When the foldable electronic device is in a folded state and the first electronic component is not provided (the fourth gap is not provided), the antenna can generate two resonances near 0.9 GHz and near 0.95 GHz. The resonance near 0.95 GHz (the first parasitic resonance) can be generated by the second radiator.

[0339] Case 3: When the foldable electronic device is in the folded state and the first electronic component is set (the fourth gap is opened), the antenna can generate three resonances near 0.9 GHz, near 0.95 GHz, and near 1 GHz. Two resonances near 0.95 GHz (near the second parasitic resonance) and near 1 GHz (the first parasitic resonance) can be generated by the second radiator. At the same time, the first electronic component does not affect the first parasitic resonance.

[0340] like Fig.34 , which shows the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different situations. When the first electronic element is set (the fourth slot is opened), the radiation efficiency and system efficiency of the antenna are effectively improved due to the introduction of the second parasitic resonance near 1 GHz.

[0341] Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0342] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0343] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0344] The above is only 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 who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A foldable electronic device, characterized in that: include: A first shell, a second shell and a floor, wherein The first shell includes a first frame, the second shell includes a second frame, the first frame is at least partially spaced from the floor, and the second frame is at least partially spaced from the floor; The first frame includes a first position and a second position; The second frame includes a third position and a fourth position, the second frame has a first gap at the third position, and the second frame is coupled to the floor at the fourth position; a first rotating shaft, the first rotating shaft being located between the first shell and the second shell, and the first rotating shaft being rotatably connected to the first shell and the second shell respectively; and An antenna, comprising: a first radiator and a feeding circuit, wherein the first radiator is a conductive portion of the first frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; and A second radiator and a first electronic component, wherein the second radiator is a conductive portion of the second frame between the third position and the fourth position, and a length of the second radiator is greater than or equal to two fifths of a length of the first radiator; The second radiator includes a first connection point, a first end of the first electronic component is coupled to the first connection point, and a second end of the first electronic component is coupled to the floor. Or wherein the second radiator includes a first connection point and a second connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the second connection point, and the second frame defines a second gap between the first connection point and the second connection point; Wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator is used to generate a first parasitic resonance, the second radiator and the first electronic component are used to generate a second parasitic resonance, wherein the first direction is the thickness direction of the foldable electronic device.

2. The foldable electronic device according to claim 1, characterized in that: Based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the floor, A length L1 of the second radiator between the first connection point and the third position and a length L2 of the second radiator between the third position and the fourth position satisfy: L2 / 4≤L1≤5×L2 / 12.

3. The foldable electronic device according to claim 2, characterized in that: The equivalent capacitance value of the first electronic component is greater than 10 pF, or the equivalent inductance value of the first electronic component is less than 5 nH.

4. The foldable electronic device according to claim 2 or 3, characterized in that: At the resonance point of the first parasitic resonance, the second radiator includes an electric field zero point region, the electric field zero point region includes the electric field zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between a point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm, and the first connection point is located in the electric field zero point region.

5. The foldable electronic device according to any one of claims 3 to 4, characterized in that: At the resonance point of the first parasitic resonance, the currents on the second radiator on both sides of the first connection point are in the same direction; At the resonance point of the second parasitic resonance, the current on the second radiator is reversed on both sides of the first connection point.

6. The foldable electronic device according to claim 1, characterized in that: Based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the second connection point, A length L3 of the second frame between the first connection point and the fourth position and a length L2 of the second frame between the third position and the fourth position satisfy: L2 / 4≤L3≤5×L2 / 12.

7. The foldable electronic device according to claim 6, characterized in that: The equivalent capacitance value of the first electronic component is less than 1 pF, or the first electronic component is an inductor.

8. The foldable electronic device according to claim 6 or 7, characterized in that: At the resonance point of the first parasitic resonance, the second radiator includes a current zero point region, the current zero point region includes the current zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between the point in the current zero point region and the current zero point is less than or equal to 5 mm, and the first connection point and the second connection point are located in the current zero point region.

9. The foldable electronic device according to any one of claims 6 to 8, characterized in that: At the resonance point of the first parasitic resonance, the electric field between the second radiator and the floor is in the same direction on both sides of the second gap; At the resonance point of the second parasitic resonance, the electric fields on the second radiator and the floor are opposite to each other on both sides of the second gap.

10. The foldable electronic device according to any one of claims 2 to 9, characterized in that: A frequency difference between a resonance point of the second parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

11. The foldable electronic device according to any one of claims 1 to 10, characterized in that: The length of the second radiator is greater than or equal to two-fifths of the length of the first radiator and less than or equal to two-sevenths of the length of the first radiator; A frequency difference between a resonance point of the first parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

12. A foldable electronic device, characterized in that: include: A first shell, a second shell and a floor, wherein The first shell includes a first frame, the second shell includes a second frame, the first frame is at least partially spaced from the floor, and the second frame is at least partially spaced from the floor; The first frame includes a first position and a second position; The second frame includes a third position and a fourth position; a first rotating shaft, the first rotating shaft being located between the first shell and the second shell, and the first rotating shaft being rotatably connected to the first shell and the second shell respectively; and An antenna, comprising: a first radiator and a feeding circuit, wherein the first radiator is a conductive portion of the first frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; and A second radiator and a first electronic component, wherein the second radiator is a conductive portion of the second frame between the third position and the fourth position, and a length of the second radiator is greater than or equal to two thirds of a length of the first radiator; The second frame has a first slit and a second slit at the third position and the fourth position, respectively; the second radiator includes a first connection point; the first end of the first electronic component is coupled to the first connection point; and The second end of the first electronic component is coupled to the floor, the first connection point is located in the central area of ​​the second radiator, and the distance between the point in the central area and the center of the second radiator is less than or equal to 5 mm; Or wherein the second frame is coupled to the floor at both the third position and the fourth position, the second radiator includes a first connection point and a second connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the second connection point, the second radiator has a third gap between the first connection point and the second connection point, and the first connection point and the second connection point are located in the central area; Wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator is used to generate a first parasitic resonance, the second radiator and the first electronic component are used to generate a second parasitic resonance, wherein the first direction is the thickness direction of the foldable electronic device.

13. The foldable electronic device according to claim 12, characterized in that: Based on the first end of the first electronic component being coupled to the first connection point and the second end of the first electronic component being coupled to the floor, an equivalent capacitance value of the first electronic component is greater than 10 pF, or an equivalent inductance value of the first electronic component is less than 5 nH.

14. The foldable electronic device according to claim 12 or 13, characterized in that: When the second radiator generates the first parasitic resonance, it includes an electric field zero point region, and the electric field zero point region includes the electric field zero point when the second radiator generates the first parasitic resonance. The distance between a point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm, and the first connection point is located in the electric field zero point region.

15. The foldable electronic device according to any one of claims 12 to 14, characterized in that: At the resonance point of the first parasitic resonance, the currents on the second radiator on both sides of the first connection point are in the same direction; At the resonance point of the second parasitic resonance, the current on the second radiator is reversed on both sides of the first connection point.

16. The foldable electronic device according to claim 12, characterized in that: Based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the second connection point, an equivalent capacitance value of the first electronic component is less than 1 pF, or the first electronic component is an inductor.

17. The foldable electronic device according to claim 12 or 16, characterized in that: The second radiator includes a current zero point region when the first parasitic resonance is generated, and the current zero point region includes a current zero point when the second radiator generates the first parasitic resonance. The distance between a point in the current zero point region and the current zero point is less than or equal to 5 mm, and the first connection point and the second connection point are located in the current zero point region.

18. The foldable electronic device according to any one of claims 12, 16 or 17, characterized in that: At the resonance point of the first parasitic resonance, on both sides of the third gap, the electric field between the second radiator and the floor is in the same direction; At the resonance point of the second parasitic resonance, on both sides of the third gap, the electric field between the second radiator and the floor is opposite.

19. The foldable electronic device according to any one of claims 12 to 18, characterized in that: A frequency difference between a resonance point of the second parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

20. The foldable electronic device according to any one of claims 12 to 19, characterized in that: The length of the second radiator is greater than or equal to three-half of the length of the first radiator and less than or equal to two-fifths of the length of the first radiator; A frequency difference between a resonance point of the first parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

21. A foldable electronic device, characterized in that: include: A first shell, a second shell and a floor, wherein The first shell includes a first frame, the second shell includes a second frame, the first frame is at least partially spaced from the floor, and the second frame is at least partially spaced from the floor; The first frame includes a first position and a second position; The second frame includes a third position and a fourth position; a first rotating shaft, the first rotating shaft being located between the first shell and the second shell, and the first rotating shaft being rotatably connected to the first shell and the second shell respectively; and An antenna, comprising: a first radiator and a feeding circuit, wherein the first radiator is a conductive portion of the first frame between the first position and the second position, the first radiator comprises a feeding point, and the feeding circuit is coupled to the feeding point; and a second radiator and a first electronic component, wherein the second radiator is a conductive portion of the second frame between the third position and the fourth position, Wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap along a first direction, the first radiator is used to generate a first resonance, the second radiator is used to generate a first parasitic resonance, and the second radiator and the first electronic component are used to generate a second parasitic resonance, wherein the first direction is a thickness direction of the foldable electronic device; Wherein, at the resonance point of the first parasitic resonance, the second radiator includes an electric field zero point region, the electric field zero point region includes the electric field zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between the point in the electric field zero point region and the electric field zero point is less than or equal to 5 mm, the second radiator includes a first connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the floor, and the first connection point is located in the electric field zero point region, Or wherein, at the resonance point of the first parasitic resonance, the second radiator includes a current zero point area, the current zero point area includes the current zero point of the second radiator at the resonance point of the first parasitic resonance, the distance between the point in the current zero point area and the current zero point is less than or equal to 5 mm, the second radiator includes a first connection point and a second connection point, the first end of the first electronic component is coupled to the first connection point, and the second end of the first electronic component is coupled to the second connection point, the second frame opens a first gap between the first connection point and the second connection point, and the first connection point and the second connection point are located in the current zero point area.

22. The foldable electronic device according to claim 21, characterized in that: Based on the coupling of the first end of the first electronic component to the first connection point and the coupling of the second end of the first electronic component to the floor, at the resonance point of the first parasitic resonance, the currents on the second radiator on both sides of the first connection point are in the same direction; At the resonance point of the second parasitic resonance, the current on the second radiator is reversed on both sides of the first connection point.

23. The foldable electronic device according to claim 21, characterized in that: Based on the first end of the first electronic component being coupled to the first connection point, and the second end of the first electronic component being coupled to the second connection point, At the resonance point of the first parasitic resonance, on both sides of the first gap, the electric field between the second radiator and the floor is in the same direction; At the resonance point of the second parasitic resonance, the electric fields on the second radiator and the floor are opposite to each other on both sides of the first gap.

24. The foldable electronic device according to any one of claims 21 to 23, characterized in that: The first parasitic resonance is a resonance generated when the second radiator operates in a three-quarter mode, and the second parasitic resonance is a resonance generated when the second radiator operates in a quarter mode; or The first parasitic resonance is a resonance generated when the second radiator operates in a differential mode, and the second parasitic resonance is a resonance generated when the second radiator operates in a common mode.

25. The foldable electronic device according to any one of claims 21 to 24, characterized in that: The frequency difference between the resonance point of the first parasitic resonance and the resonance point of the first resonance is less than or equal to 200 MHz, and / or, A frequency difference between a resonance point of the second parasitic resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

26. The foldable electronic device according to any one of claims 21 to 25, characterized in that: The first resonance, the first parasitic resonance and the second parasitic resonance are used to jointly support an operating frequency band of the electronic device.

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