Foldable electronic device

Abstract

Embodiments of the present application provide a foldable electronic device including an antenna. The foldable electronic device includes a first bezel and a second bezel arranged foldably. The antenna has a main branch formed by a part of the first bezel and a parasitic branch formed by a part of the second bezel. The parasitic branch is electrically connected with an electronic component. In a folded state of the foldable electronic device, the parasitic branch generates a first parasitic resonance and a second parasitic resonance, thereby expanding the operating bandwidth of the antenna and improving the communication performance of the foldable electronic device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wireless communication, and particularly relates to a foldable electronic device. BACKGROUND

[0002] With the increasing demand for high-speed data transmission, the development trend of the industrial design (ID) of electronic devices is large screen ratio and multiple cameras. This results in a significant reduction in antenna clearance and increasingly limited layout space.

[0003] Under the current situation, the communication frequency bands of electronic devices will coexist with 3th generation wireless systems (3G), 4th generation wireless systems (4G) and 5th generation wireless systems (5G) frequency bands for a long time, and the frequency band coverage is becoming wider and wider. Based on these changes, the expansion of the working bandwidth of the antenna on the electronic device has become a top priority. SUMMARY

[0004] The embodiment of the present application provides a foldable electronic device including an antenna. The foldable electronic device includes a first bezel and a second bezel which are foldably arranged. The antenna has a part of the first bezel as a radiation branch (including a feed point) and a part of the second bezel as a parasitic branch. The parasitic branch is electrically connected with an electronic element. In the folded state of the foldable electronic device, the working bandwidth of the antenna is expanded by the resonances generated by multiple modes of the parasitic branch, and the communication performance of the foldable electronic device is improved.

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

[0006] According to embodiments of the present application, when the foldable electronic device is in a folded state, the first radiator in the antenna serves as a main radiating branch (a branch fed with a signal by a feed point), and the second radiator serves as a parasitic branch. The second radiator can generate a first parasitic resonance and a second parasitic resonance through coupling with the first radiator. The length of the second radiator can determine the resonance frequency of the first parasitic resonance, and the length of the second radiator and the electrical parameters of the first electronic element can cause the first parasitic resonance and the second parasitic resonance to be close to the first resonance. The first resonance, the first parasitic resonance, and the second parasitic resonance can be used to expand the operating bandwidth of the antenna and collectively support one operating frequency band of the foldable electronic device 100.

[0007] In some embodiments of the first aspect, based on the first end of the first electronic element being coupled to the first connection point and the second end of the first electronic element being coupled to the ground plane, 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 the embodiments of the present application, when the second radiator resonates, an electric field zero point (a current maximum point) can be generated on the second radiator (a current zero point included in the current and electric field distribution corresponding to the three-quarter wavelength mode). The first electronic element is grounded in the electric field zero point region, and the three-quarter wavelength mode generates an electric field zero point near the first connection point, so that it becomes a new three-quarter wavelength mode. Moreover, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted by using the first electronic element. At the same time, since the first connection point is located in the electric field zero point region of the three-quarter wavelength mode, the first electronic element is electrically connected to the ground plane in this region, and the boundary condition is not changed, and the original three-quarter wavelength mode has little influence. Therefore, the antenna can include two three-quarter wavelength modes to expand the operating bandwidth of the antenna.

[0009] In some embodiments of the first aspect, an equivalent capacitance value of the first electronic element is greater than 10 pF, or an equivalent inductance value of the first electronic element is less than 5 nH.

[0010] In some embodiments 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 an electric field zero point of the second radiator at the resonance point of the first parasitic resonance, a 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 some embodiments of the first aspect, at the resonance point of the first parasitic resonance, currents on the second radiator on both sides of the first connection point are in the same direction, and at the resonance point of the second parasitic resonance, currents on the second radiator on both sides of the first connection point are in opposite directions.

[0012] In some embodiments of the first aspect, based on the first end of the first electronic element being coupled to the first connection point and the second end of the first electronic element 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.

[0013] According to the embodiments of the present application, when the second radiator resonates, an electric field large 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). The second slot is arranged in the electric field large point area, and the three-quarter wavelength mode generates an electric field large point near the second slot, so that it becomes a new three-quarter wavelength mode. Moreover, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted by the first electronic element. At the same time, since the second slot is located in the electric field large point area of the three-quarter wavelength mode, the second slot is arranged in the area, and the boundary condition is not changed, and the original three-quarter wavelength mode has little influence. Therefore, the antenna can include two three-quarter wavelength modes to expand the working bandwidth of the antenna.

[0014] With reference to the first aspect, in some implementations of the first aspect, an equivalent capacitance value of the first electronic element is less than 1 pF, or the first electronic element is an inductor.

[0015] With reference to the first aspect, in some implementations of the first aspect, at a resonance point of the first parasitic resonance, the second radiator includes a current zero point area, the current zero point area includes a current zero point of the second radiator at the resonance point of the first parasitic resonance, a distance between a point in the current zero point area 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 area.

[0016] With reference to the first aspect, in some implementations of the first aspect, at a resonance point of the second parasitic resonance, electric fields between the second radiator and the ground plate on both sides of the second slot are opposite.

[0017] With reference to the first aspect, in some implementations of the first aspect, a 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.

[0018] With reference to the first aspect, in some implementations of the first aspect, a length of the second radiator is greater than or equal to two-fifths of a length of the first radiator and less than or equal to two-sevenths of the length of the first radiator; and a 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] With reference to the first aspect, in some implementations of the first aspect, a third slot is formed in the first bezel at the first position, the first bezel is coupled with the ground plate at the second position, based on that the foldable electronic device is in the folded state, the first slot and the third slot are aligned along the first direction, or the second slot and the third slot are aligned along the first direction.

[0020] In a second aspect, a foldable electronic device is provided, comprising: a first housing, a second housing, and a floor, wherein the first housing comprises a first bezel, the second housing comprises a second bezel, the first bezel is at least partially spaced apart from the floor, and the second bezel is at least partially spaced apart from the floor; the first bezel comprises a first position and a second position; the second bezel comprises a third position and a fourth position; a first hinge, the first hinge is located between the first housing and the second housing, and the first hinge is rotationally connected with the first housing and the second housing, respectively; and an antenna, the antenna comprises: a first radiator and a feed circuit, the first radiator is a conductive part of the first bezel between the first position and the second position, the first radiator comprises a feed point, and the feed circuit is coupled with the feed point; and a second radiator and a first electronic component, the second radiator is a conductive part of the second bezel between the third position and the fourth position, a length of the second radiator is greater than or equal to two-thirds of a length of the first radiator; wherein the second bezel is provided with a first gap and a second gap at the third position and the fourth position, respectively, the second radiator comprises a first connection point, a first end of the first electronic component is coupled with the first connection point, and a second end of the first electronic component is coupled with the floor, the first connection point is located in a central region of the second radiator, a distance between a point in the central region and a center of the second radiator is less than or equal to 5 mm; or wherein the second bezel is coupled with the floor at the third position and the fourth position, the second radiator comprises a first connection point and a second connection point, a first end of the first electronic component is coupled with the first connection point, and a second end of the first electronic component is coupled with the second connection point, the second radiator is provided with 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 region; 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.

[0021] In combination with the second aspect, based on the first end of the first electronic component being coupled with the first connection point, and the second end of the first electronic component being coupled with the floor, in some implementations of the second 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.

[0022] With reference to the second aspect, in some implementations of the second aspect, the second radiator comprises an electric field null region when the first parasitic resonance is generated, the electric field null region comprising an electric field null point when the first parasitic resonance is generated, a distance between a point in the electric field null region and the electric field null point being less than or equal to 5 mm, the first connection point being located in the electric field null region.

[0023] With reference to the second aspect, in some implementations of the second aspect, at a resonance point of the first parasitic resonance, currents on the second radiator on two sides of the first connection point are in the same direction; at a resonance point of the second parasitic resonance, currents on the second radiator on two sides of the first connection point are in opposite directions.

[0024] With reference to the second aspect, in some implementations of the second aspect, based on a first end of the first electronic element being coupled to the first connection point and a second end of the first electronic element being coupled to the second connection point, an equivalent capacitance value of the first electronic element is less than 1 pF, or the first electronic element is an inductor.

[0025] With reference to the second aspect, in some implementations of the second aspect, the second radiator comprises a current null region when the first parasitic resonance is generated, the current null region comprising a current null point when the first parasitic resonance is generated, a distance between a point in the current null region and the current null point being less than or equal to 5 mm, the first connection point and the second connection point being located in the current null region.

[0026] With reference to the second aspect, in some implementations of the second aspect, at a resonance point of the first parasitic resonance, electric fields between the second radiator and the ground plane on two sides of the third gap are in the same direction; at a resonance point of the second parasitic resonance, electric fields between the second radiator and the ground plane on two sides of the third gap are in opposite directions.

[0027] With reference to the second aspect, in some implementations of the second aspect, a 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] With reference to the second aspect, in some implementations of the second aspect, a length of the second radiator is greater than or equal to two-thirds of a length of the first radiator and less than or equal to two-fifths of the length of the first radiator; a 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.

[0029] With reference to the second aspect, in some implementations of the second aspect, the first bezel is configured to open a fourth slit at the first position, the first bezel is coupled with the floor at the second position, based on the foldable electronic device being in the 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 housing, a second housing, and a floor, wherein the first housing comprises a first bezel, the second housing comprises a second bezel, the first bezel is at least partially spaced apart from the floor, and the second bezel is at least partially spaced apart from the floor; the first bezel comprises a first position and a second position; the second bezel comprises a third position and a fourth position; a first hinge, the first hinge is located between the first housing and the second housing, and the first hinge is rotationally connected with the first housing and the second housing, respectively; and an antenna, the antenna comprises: a first radiator and a feed circuit, the first radiator is a conductive part of the first bezel between the first position and the second position, the first radiator comprises a feed point, and the feed circuit is coupled with the feed point; and a second radiator and a first electronic element, the second radiator is a conductive part of the second bezel 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 element are used to generate a second parasitic resonance, wherein the first direction is a thickness direction of the foldable electronic device; wherein at a resonance point of the first parasitic resonance, the second radiator comprises an electric field zero point region, the electric field zero point region comprises an electric field zero point of the second radiator at the resonance point of the first parasitic resonance, a 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, the second radiator comprises a first connection point, a first end of the first electronic element is coupled with the first connection point, and a second end of the first electronic element is coupled with 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 comprises a current zero point region, the current zero point region comprises a current zero point of the second radiator at the resonance point of the first parasitic resonance, a distance between a point in the current zero point region and the current zero point is less than or equal to 5 mm, the second radiator comprises a first connection point and a second connection point, a first end of the first electronic element is coupled with the first connection point, and a second end of the first electronic element is coupled with the second connection point, the second bezel is provided with 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 some implementations of the third aspect, based on a first end of the first electronic element being coupled to the first connection point and a second end of the first electronic element being coupled to the ground plane, at a resonance point of the first spurious resonance, currents on the second radiating element on both sides of the first connection point are in the same direction; at a resonance point of the second spurious resonance, currents on the second radiating element on both sides of the first connection point are in opposite directions.

[0032] In some implementations of the third aspect, based on a first end of the first electronic element being coupled to the first connection point and a second end of the first electronic element being coupled to the second connection point, at a resonance point of the first spurious resonance, electric fields between the second radiating element and the ground plane on both sides of the first gap are in the same direction; at a resonance point of the second spurious resonance, electric fields between the second radiating element and the ground plane on both sides of the first gap are in opposite directions.

[0033] In some implementations of the third aspect, the first spurious resonance is a resonance generated when the second radiating element operates in a three-quarter mode, and the second spurious resonance is a resonance generated when the second radiating element operates in a quarter mode; or the first spurious resonance is a resonance generated when the second radiating element operates in a differential mode, and the second spurious resonance is a resonance generated when the second radiating element operates in a common mode.

[0034] In some implementations of the third aspect, a difference between a frequency at the resonance point of the first spurious resonance and a frequency at the resonance point of the first resonance is less than or equal to 200 MHz, and / or a difference between a frequency at the resonance point of the second spurious resonance and the frequency at the resonance point of the first resonance is less than or equal to 200 MHz.

[0035] In some implementations of the third aspect, the first resonance, the first spurious resonance, and the second spurious resonance are used to collectively support one operating frequency band of the electronic device. BRIEF DESCRIPTION OF DRAWINGS

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

[0037] Figure 2 FIG. 2 is a schematic structural diagram of the foldable electronic device 100 in an outer folding state.

[0038] Figure 3 FIG. 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 a foldable electronic device 100 in a possible folded state.

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

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

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

[0043] Figure 8 is a schematic diagram of the structure of a common mode of an antenna provided by the present application and the distribution of corresponding current, electric field, magnetic current.

[0044] Figure 9 is a schematic diagram of the structure of a differential mode of an antenna provided by the present application and the distribution of corresponding current, electric field, magnetic current.

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

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

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

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

[0049] Figure 14 is Figure 13 is a simulation result diagram of S parameters of the antenna 200 shown in FIG.

[0050] Figure 15 is Figure 13 is a simulation result of radiation efficiency and system efficiency of the antenna 200 shown in FIG.

[0051] Figure 16 is Figure 13 is a schematic diagram of the electric field and current distribution of the region near the second radiator in the antenna 200 shown in FIG. at the second parasitic resonance (for example, 0.85 GHz).

[0052] Figure 17 is Figure 13An electric field and current distribution schematic diagram of a region near the second radiator in the antenna 200 at a first parasitic resonance (e.g., 0.96 GHz).

[0053] Figure 18 is a schematic diagram of another foldable electronic device 100 provided by embodiments of the present application.

[0054] Figure 19 is Figure 18 is a simulation result diagram of S parameters of the antenna 200.

[0055] Figure 20 is Figure 18 is a simulation result of radiation efficiency and system efficiency of the antenna 200.

[0056] Figure 21 is Figure 18 An electric field and current distribution schematic diagram of a region near the second radiator in the antenna 200 at a first parasitic resonance (e.g., 0.94 GHz).

[0057] Figure 22 is Figure 18 An electric field and current distribution schematic diagram of a region near the first radiator in the antenna 200 at a second parasitic resonance (e.g., 0.98 GHz).

[0058] Figure 23 is a schematic diagram of another foldable electronic device 200 provided by embodiments of the present application.

[0059] Figure 24 is Figure 23 is a simulation result diagram of S parameters of the antenna 200.

[0060] Figure 25 is Figure 23 is a simulation result of radiation efficiency and system efficiency of the antenna 200.

[0061] Figure 26 is a schematic diagram of another foldable electronic device 100 provided by embodiments of the present application.

[0062] Figure 27 is a schematic diagram of a distribution device provided by embodiments of the present application.

[0063] Figure 28 is Figure 26 is a simulation result diagram of S parameters of the antenna 200.

[0064] Figure 29 is Figure 26 is a simulation result of radiation efficiency and system efficiency of the antenna 200.

[0065] Figure 30 is Figure 26An electric field distribution schematic diagram of a region near the second radiator in the antenna 200 shown at a first parasitic resonance (for example, 0.91 GHz).

[0066] Figure 31 is Figure 26 An electric field distribution schematic diagram of a region near the first radiator in the antenna 200 shown at a second parasitic resonance (for example, 0.97 GHz).

[0067] Figure 32 is a schematic diagram of yet another foldable electronic device 200 provided by an embodiment of the present application.

[0068] Figure 33 is Figure 32 A simulation result diagram of S parameters of the antenna 200 shown.

[0069] Figure 34 is Figure 32 Simulation results of radiation efficiency and system efficiency of the antenna 200 shown. DETAILED DESCRIPTION

[0070] Hereinafter, terms that can appear in embodiments of the present application are explained.

[0071] It should be understood that the term "and / or" used herein is only to describe the same field of associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0072] "Within the range" used in the present application, by default, includes both end values of the range, unless it is indicated separately that the end values are not included, for example, within the range of 1 to 5, including both 1 and 5.

[0073] Coupling: can be understood as direct coupling and / or indirect coupling, and "coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be referred to as "electrical connection", which means that the components are in physical contact and electrically conductive; it can also be understood as a form of connection between different components in the circuit structure through the entity circuit of the copper foil or wire of the printed circuit board (PCB) that can transmit electrical signals; "indirect coupling" can be understood as electrical conduction between two conductors through space / non-contact. In an embodiment, indirect coupling can also be referred to as capacitive coupling, for example, through the coupling between the gap between two conductive parts to form an equivalent capacitor to achieve signal transmission.

[0074] Element / device: includes at least one of lumped elements / devices and distributed elements / devices.

[0075] Lumped element / device: Refers to a collective term for elements whose size is much smaller than the wavelength relative to the frequency of the circuit. For a signal, the element characteristics remain fixed at any time, regardless of the frequency.

[0076] Distributed element / device: Unlike lumped elements, if the element size is similar to or greater than the wavelength relative to the frequency of the circuit, the characteristics of each point in the element itself will be different due to changes in the signal when the signal passes through the element. At this time, the element as a whole cannot be regarded as a single body with fixed characteristics, and should be referred to as a distributed element.

[0077] Capacitance: Can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to a component that exhibits capacitance, such as a capacitor element; distributed capacitance (or distributed capacitance) refers to an equivalent capacitance formed by two conductive parts separated by a certain gap.

[0078] Inductance: Can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to a component that exhibits inductance, such as an inductor element; distributed inductance (or distributed inductance) refers to an equivalent inductance formed by a certain length of conductive part.

[0079] Radiating body: It is a device used in an antenna to receive / send electromagnetic wave radiation. In some cases, "antenna" is understood in a narrow sense as a radiating body, which changes the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy for radiating and receiving radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiating body through the feeder, which is converted into electromagnetic wave energy of a certain polarization by the radiating body and radiated in the desired direction. The receiving radiating body converts electromagnetic wave energy of a certain polarization from a certain direction in space into modulated high-frequency current energy, which is delivered to the input end of the receiver through the feeder.

[0080] The radiator can include a conductor with a specific shape and size, such as a wire shape, or a patch shape, etc. The application does not limit the specific shape. In an embodiment, the wire shape radiator can be referred to as a wire antenna. In an embodiment, the wire shape radiator can be implemented by a conductive frame, which can also be referred to as a frame antenna. In an embodiment, the wire shape radiator can be implemented by a support conductor, which can also be referred to as a support antenna. In an embodiment, the wire diameter (e.g., including thickness and width) of the wire shape radiator, or the wire antenna, is much smaller (e.g., less than 1 / 16 of the wavelength) than the wavelength (e.g., the medium wavelength), and the length can be comparable to the wavelength (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of the wire antenna include a dipole antenna, a half-wave vibrator antenna, a monopole antenna, a loop antenna, and an inverted F antenna (also referred to as IFA). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feed from the feed end of the radiating branch. For example, the inverted F antenna (IFA) can be obtained by adding a ground path to a monopole antenna. The IFA antenna has a feed point and a ground point, and is called an inverted F antenna because its side view is in the shape of an inverted F. In an embodiment, the patch shape radiator can include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also referred to as PIFA). In an embodiment, the patch shape radiator can be implemented by a planar conductor (such as a conductive patch or a conductive coating, etc.). In an embodiment, the patch shape radiator can include a conductive patch, such as a copper patch, etc. In an embodiment, the patch shape radiator can include a conductive coating, such as silver paste, etc. The shape of the patch shape radiator includes a circular shape, a rectangular shape, a loop shape, etc. The structure of the microstrip antenna generally includes a dielectric substrate, a radiator, and a ground plate, wherein the dielectric substrate is arranged between the radiator and the ground plate.

[0081] The radiators can also include slots or gaps formed on the conductors, for example, closed or semi-closed slots or gaps formed on the ground conductor plane. In one embodiment, the radiators with slots or gaps can be referred to as slot antennas or gap antennas. In one embodiment, the slots or gaps of the slot antennas / gap antennas have a radial dimension (e.g., including width) much smaller than the wavelength (e.g., dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and a length dimension comparable to the wavelength (e.g., dielectric wavelength) (e.g., around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiators with closed slots or gaps can be referred to as closed slot antennas. In one embodiment, the radiators with semi-closed slots or gaps (e.g., with openings added to the closed slots or gaps) can be referred to as open slot antennas. In some embodiments, the gap shape is long and thin. In some embodiments, the length of the gap is about half of the wavelength (e.g., dielectric wavelength). In some embodiments, the length of the gap is about an integer number of wavelengths (e.g., one dielectric wavelength). In some embodiments, the gap can be fed by a transmission line across one or both of its sides, whereby an RF electromagnetic field is excited on the gap and electromagnetic waves are radiated into space. In one embodiment, the radiators of the slot antennas or gap antennas can be implemented by conductive frames grounded at both ends, which can also be referred to as frame antennas. In this embodiment, the slot antennas or gap antennas can be considered to include linear radiators spaced apart from the ground plane and grounded at both ends, thereby forming closed or semi-closed slots or gaps. In one embodiment, the radiators of the slot antennas or gap antennas can be implemented by bracket conductors grounded at both ends, which can also be referred to as bracket antennas.

[0082] The feed circuit / structure is a combination of all components of an antenna for the purpose of reception and transmission of RF waves. In the case of a receiving antenna, the feed circuit can be considered as the antenna part 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 including the RF chip to the feed point on the radiator or transmission line. The feed circuit has the function of converting radio waves into electrical signals and sending them to the receiver components. In general, it is considered as part of the antenna for converting radio waves into electrical signals and vice versa. The antenna should be designed to consider the maximum power transmission possibility and efficiency. For this purpose, the antenna feed impedance must be matched to the load resistance. The antenna feed impedance is a combination of resistance, capacitance, and inductance. To ensure maximum power transmission conditions, the two impedances (load resistance and feed impedance) should be matched. The matching can be done by considering the frequency requirements and the design parameters of the antenna (e.g., gain, directivity, and radiation efficiency).

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

[0084] Open end, closed end: in some embodiments, the open end and the closed end are, for example, relative to whether the ground, the closed end is grounded, and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, relative to other conductive bodies, the closed end is electrically connected to other conductive bodies, and the open end is not electrically connected to other conductive bodies. In an embodiment, the open end can also be referred to as a suspended end, a free end, an open end, or an open circuit end. In an embodiment, the closed end can also be referred to as a grounded end or a short-circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled to the open end to transfer coupled energy (which can be understood as transferring current).

[0085] In some embodiments, the understanding of the "closed end" can also be from the perspective of the current distribution, and the closed end or the grounded end, etc. can be understood as a current large point on the radiator, or a small point of the electric field on the radiator; in an embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the closed end can not change the current distribution characteristics of the current large point / small point of the electric field; in an embodiment, opening a slot (for example, a gap filled with insulating material) at or near the closed end can not change the current distribution characteristics of the current large point / small point of the electric field.

[0086] In some embodiments, the understanding of the "open end" can also be from the perspective of the current distribution, and the open end or the suspended end, etc. can be understood as a current small point on the radiator, or a large point of the electric field on the radiator; in an embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the open end can not change the current distribution characteristics of the current small point / large point of the electric field.

[0087] It should be understood that the radiator end at a gap (similar to the open end or the suspended end of the opening of the radiator from the structure of the radiator) coupled to electronic devices (such as capacitors, inductors, etc.) can make the radiator end a current large point / small point of the electric field, and in this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0088] Resonance / resonance frequency: resonance frequency can refer to the frequency at which the imaginary part of the input impedance of an antenna is zero. Resonance frequency can have a frequency range, i.e. a range of frequencies at which resonance occurs. The frequency at which resonance is strongest is the center frequency point. The return loss characteristic at the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, the first resonance mentioned in the present application refers to the fundamental mode resonance produced by the antenna / radiator, or the resonance with the lowest frequency produced by the antenna / radiator.

[0089] Resonance frequency band / communication frequency band / operating frequency band: regardless of the type of antenna, it always works in a certain frequency range (bandwidth). For example, an antenna supporting B40 frequency band has an operating frequency band including frequencies in the range of 2300MHz-2400MHz, or in other words, the operating frequency band of the antenna includes B40 frequency band. The frequency range that meets the index requirements can be regarded as the operating frequency band of the antenna.

[0090] Electrical length: can refer to the ratio of physical length (i.e. mechanical length or geometric length) to the wavelength of the electromagnetic wave transmitted, and the electrical length can satisfy the following formula:

[0091]

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

[0093] Wavelength: or operating wavelength, can be the wavelength corresponding to the center frequency of the resonance 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 (resonance frequency of 1920MHz-1980MHz) is 1955MHz, the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non-center frequency of the resonance 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: (air wavelength, or vacuum wavelength) = speed of light / frequency, wherein the frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3x108m / s. The wavelength of the radiation signal in the medium can be calculated as follows: wherein ε is the relative permittivity of the medium. The wavelength in the embodiments of the present application generally refers to a medium wavelength, which can be a medium wavelength corresponding to a center frequency of a resonance frequency or a center frequency of a working frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonance frequency of 1920-1980 MHz) is 1955 MHz, the wavelength can be a medium wavelength calculated using the frequency of 1955 MHz. Without being limited to the center frequency, the "medium wavelength" can also refer to a medium wavelength corresponding to a non-center frequency of the resonance frequency or the working frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative permittivity of the medium filled on one side or multiple sides of the radiator.

[0095] Total efficiency of the antenna system: refers to the ratio of the input power at the port of the antenna to the output power.

[0096] Radiation efficiency of the antenna: refers to the ratio of the power radiated by the antenna into space (i.e., the power of the part effectively converted into electromagnetic waves) to the active power input into the antenna. The active power input into the antenna = input power of the antenna - loss power; the loss power mainly includes the backwave loss power and the ohmic loss power of the metal and / or the dielectric loss power. The radiation efficiency is a value for measuring the radiation capability of the antenna, and the metal loss and the dielectric loss are both factors affecting the radiation efficiency.

[0097] As can be understood by those skilled in the art, the efficiency is generally expressed in percentage, and there is a corresponding conversion relationship between the efficiency and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is represented.

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

[0099] The antenna backwave loss can be represented by the S11 parameter, which belongs to the S parameters. S11 represents the reflection coefficient, and this parameter can represent the pros and cons of the antenna transmission efficiency. The S11 parameter is usually negative, and the smaller the S11 parameter, the smaller the antenna backwave loss, and the smaller the energy reflected back by the antenna itself, which means that the actual energy entering the antenna is greater, and the system efficiency of the antenna is higher; the larger the S11 parameter, the larger the antenna backwave loss, and the lower the system efficiency of the antenna.

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

[0101] Ground (GND): can refer to at least a part of any ground layer, or ground plate, or ground metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of the above ground layer, or ground plate, or ground component, and the ground can be used for the grounding of components in the electronic device. In one embodiment, the ground can be a ground layer of a circuit board of the electronic device, or a ground plate formed by a middle frame of the electronic device, or a ground metal layer formed by a metal film under the screen. In one embodiment, the circuit board can be a printed circuit board (PCB), for example, an 8-layer, 10-layer, or 12-14 layer board with 8, 10, 12, 13, or 14 layers of conductive material, or elements separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a wiring layer, and the wiring layer and the ground layer are electrically connected by a via. In one embodiment, components such as a display, a touch screen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to the circuit board; or electrically connected to the wiring layer and / or the ground layer in the circuit board. For example, a radio frequency source is arranged on the wiring layer.

[0102] Any of the above ground layer, or ground plate, or ground metal layer is made of conductive material. In one embodiment, the conductive material can use 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 on an insulating substrate, and tin-plated copper, graphite powder impregnated cloth, graphite coated substrate, copper plated substrate, brass plated substrate, and aluminum plated substrate. Those skilled in the art can understand that the ground layer / ground plate / ground metal layer can also be made of other conductive materials.

[0103] Grounding: refers to coupling with the above ground / ground plate in any way. In one embodiment, the grounding can be through physical grounding, for example, through a part of the structure of the middle frame to realize physical grounding (or called physical ground) at a specific position on the frame. In one embodiment, the grounding can be through device grounding, for example, through capacitors / inductors / resistors and the like in series or parallel (or called device ground).

[0104] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0105] Figure 1 FIG. 1 is a structural schematic diagram of a foldable electronic device 100 according to an embodiment of the present application. The foldable electronic device 100 can be a mobile phone, a tablet computer, an e-book, a notebook computer, a wearable device such as a watch, or the like. Figure 1 The embodiment shown takes a foldable mobile phone as an example for illustration.

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

[0107] Figure 1 The flexible display screen 110 can be schematically represented by filling a dot matrix pattern. The flexible display screen 110 can have strong flexibility and bendability, and can provide a new interaction mode for a user based on the bendability. The display panel of the flexible display screen 110 can be any one of a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light emitting diode (QLED), or the like, without limitation.

[0108] The flexible display screen 110 can include a first display portion 111 corresponding to the first housing 126, a second display portion 112 corresponding to the second housing 127, and a foldable display portion 113 corresponding to the hinge 125. The foldable display portion 113 can be connected between the first display portion 111 and the second display portion 112.

[0109] The first frame 121 can surround the outer periphery of the first cover 122, and at least part of the first frame 121 can also surround the outer periphery of the first display part 111. The first display part 111 can be arranged in parallel with the first cover 122 with a spacing, and the first display part 111 can be located on both sides of the first frame 121 with the first cover 122. The spacing between the first display part 111 and the first cover 122 can be used to arrange devices of the foldable electronic device 100, such as an antenna, a circuit board assembly, etc.

[0110] The second frame 123 can surround the outer periphery of the second cover 124, and at least part of the second frame 123 can also surround the outer periphery of the second display part 112. The second display part 112 can be arranged in parallel with the second cover 124 with a spacing, and the second display part 112 can be located on both sides of the second frame 123 with the second cover 124. The spacing between the second display part 112 and the second cover 124 can be used to arrange devices of the foldable electronic device 100, such as an antenna, a circuit board assembly, etc.

[0111] In an embodiment provided in the present application, the cover and the frame can be two parts of the shell of the foldable electronic device 100, and the cover and the frame can be connected, and the connection form can not belong to assembly methods such as clamping, sticking, welding, riveting, clearance fit, etc. The connection relationship between the cover and the frame is usually difficult to be divided. In another embodiment provided in the present application, the cover and the frame can be two different components. By assembling the cover 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. The part of the frame serving as the antenna radiator can have a gap with other parts of the cover, so as to ensure that the antenna radiator has a good radiation environment. In an embodiment, the cover can be provided with a break at the part 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 made of a non-conductive material, the antenna radiator can be arranged in the electronic device 100 and extend along the frame. For example, the antenna radiator can be arranged close to the frame to minimize the volume occupied by the antenna radiator and be closer to the outside of the electronic device 100 to achieve better signal transmission effect. It should be noted that the arrangement of the antenna radiator close to the frame means that the antenna radiator can be arranged closely to the frame, or can be arranged close to the frame, for example, the antenna radiator and the frame can have a small gap therebetween.

[0114] The antenna of the electronic device 100 can also be arranged in the shell, for example, a bracket antenna, a millimeter wave antenna, etc. Figure 1The antenna clearance provided in the housing can be obtained by a slit / hole on any one of the cover, the bezel, and / or the display screen, or by a non-conductive gap / aperture formed between any two of them, which can ensure the radiation performance of the antenna. It should be understood that the antenna clearance can be a non-conductive area formed by any conductive component in the electronic device 100, through which the antenna radiates signals to the external space. In an embodiment, the antenna can be in the form of a flexible printed circuit (FPC) based antenna, a laser-direct-structuring (LDS) based antenna, a microstrip disk antenna (MDA), or the like. In an embodiment, the antenna can also be in the form of a transparent structure embedded in the 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 can further include a printed circuit board (PCB) (not shown in the figure). The PCB is provided in the cavity formed by the cover. The PCB can be made of a flame-retardant material (FR-4) medium plate, a Rogers medium plate, a hybrid medium plate of Rogers and FR-4, or the like. Here, FR-4 is a code for a flame-retardant material grade, and the Rogers medium plate is a high-frequency board. The PCB 17 carries electronic components such as radio frequency chips, etc. In an embodiment, a metal layer can be provided on the printed circuit board PCB. The metal layer can be used for grounding of the electronic components carried on the printed circuit board PCB, and can also be used for grounding of other components such as a bracket antenna, a bezel antenna, etc. The metal layer can be referred to as a ground plate, or a grounding plate, or a grounding layer. In an embodiment, the metal layer can be formed by etching metal on the surface of any one of the medium plates in the PCB. In an embodiment, the metal layer for grounding can be provided on one side of the printed circuit board PCB close to the flexible display screen 110. In an embodiment, the edge of the PCB can be regarded as the edge of its grounding layer. The electronic device 100 can also have other ground plates / grounding plates / grounding layers, which are not described here again as described before.

[0116] The rotation shaft 125 can be connected between the first housing 126 and the second housing 127. Under the action of the rotation shaft 125, the first housing 126 and the second housing 127 can move closer to or farther away from each other. Correspondingly, the first display part 111 of the flexible display screen 110 and the second display part 112 of the flexible display screen 110 can move closer to 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 can include a main shaft, a first connecting assembly, and a second connecting assembly, for example. The first connecting assembly can be fixed with the first cover 122, and the second connecting assembly can be fixed with the second cover 124. The first connecting assembly and the second connecting assembly can rotate relative to the main shaft. Through the mutual movement of the first connecting assembly and the second connecting assembly, the first housing 126 and the second housing 127 can be driven to move relative to each other, so as to realize the opening and closing function of the foldable electronic device 100.

[0118] Figure 1 The foldable electronic device 100 shown is in an unfolded state. In the unfolded state, the angle between the first housing 126 and the second housing 127 can be about 180°. The flexible display screen 110 can be in the unfolded state as shown. Figure 1 The foldable electronic device 100 shown is in an unfolded state. In the unfolded state, the angle between the first housing 126 and the second housing 127 can be about 180°. The flexible display screen 110 can be in the unfolded state as shown.

[0119] Figure 2 A possible folded state of the foldable electronic device 100 is shown. In this state, Figure 2 A folded-out state of the foldable electronic device 100 is shown (the folded-out state can be referred to as an outward folding state for short). Figure 2 The folded-out state shown can be a left-right folded-out state or an up-down folded-out state, for example. In the following, a possible folded state of the foldable electronic device 100 is described in combination with Figure 1 and Figure 2 A possible folded state of the foldable electronic device 100 is shown. In this state,

[0120] In the embodiments of the present application, the foldable electronic device 100 in a folded state can mean that the foldable electronic device 100 is currently bent, and the bending degree of the foldable electronic device 100 reaches the maximum. At this time, the first cover 122 and the second cover 124 can be approximately parallel, spaced apart from each other, and arranged face to face, and the spacing distance between the first cover 122 and the second cover 124 is the smallest. At least part of the first housing 126 and the second housing 127 are accommodated in the space surrounded by the flexible display screen 110; the first display part 111, the first housing 126, the second housing 127, and the second display part 112 are sequentially stacked. Similarly, the first display part 111 and the second display part 112 can be approximately parallel and spaced apart from each other, and the spacing distance between the first cover 122 and the second cover 124 is smaller than the spacing distance between the first display part 111 and the second display part 112. At this time, the first display part 111 and the second display part 112 can be regarded as being located on different planes.

[0121] In combination with 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 approach each other, and the first display unit 111 and the second display unit 112 can approach each other. The first display unit 111, the second display unit 112, and the foldable display unit 123 can form a housing area for accommodating the first cover 122, the second cover 124, and the hinge 125. That is, the first cover 122, the second cover 124, and the hinge 125 can be accommodated in the space between the first display unit 111 and the second display unit 112.

[0122] It should be understood that the foldable electronic device 100 can be folded inward (the inward folded state can be simply referred to as the inward folded state). When the foldable electronic device 100 is in the inward folded state, the first cover 122 and the second cover 124 can be brought close to each other, and the first display unit 111 and the second display unit 112 can be brought close to each other. The first cover 122, the second cover 124, and the hinge 125 can form a housing area for accommodating the first display unit 111, the second display unit 112, and the foldable display unit 123. That is, the first display unit 111, the second display unit 112, and the foldable display unit 123 can be accommodated in the 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, it occupies a relatively small space; when the foldable electronic device 100 is in the unfolded state, it can display a relatively large screen to increase the user's viewing range.

[0124] The foldable electronic device 100 may also include a third housing 128 and a hinge 129, such as 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 or far from each other. As the number of foldable parts of the foldable electronic device 100 increases, while maintaining the same screen size in the unfolded state, the space occupied by the foldable electronic device 100 can be further reduced in the folded state.

[0125] And in Figure 3 The foldable electronic device 100 shown has three foldable parts (first housing 126, second housing 127 and third housing 128), and therefore has three states: 1. unfolded state; 2. folded state; 3. partially unfolded state.

[0126] 1. For example Figure 3As shown, it 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 can be about 180°. The flexible display screen 110 can be in the unfolded state.

[0127] 2. As shown, it is a possible folded state (three-folded state) of the foldable electronic device 100. In the folded state, the first housing 126 and the second housing 127 are rotated along the rotation axis 125, and the second housing 127 and the third housing 128 are rotated 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 considered to be located on different planes. Figure 4 3. As shown, it 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 housing 126 and the second housing 127 can be about 180°, and the second housing 127 and the third housing 128 are rotated along the rotation axis 129, so that the third housing 128 approaches the second housing 127. At this time, the first housing 126 and the second housing 127 are considered to be located on the same plane, and the second housing 127 and the third housing 128 can be considered to be located on different planes. In another possible partially unfolded state, the angle between the third housing 128 and the second housing 127 can be about 180°, and the first housing 126 and the second housing 127 are rotated along the rotation axis 125, so that the first housing 126 approaches the second housing 127.

[0128] Figure 5 Only some components included in the electronic device 100 are schematically shown, and the actual shape, actual size and actual structure of these components are not limited by

[0129] the drawings. Figure 1 Figure 1 It should be understood that in the embodiments of the present application, the face where the display screen of the electronic device is located is considered as the front face, the face where the back cover is located is considered as the back face, and the face where the frame is located is considered as the side face.

[0130] It should be understood that in the embodiments of the present application, when the user holds (usually vertically and faces the screen) the electronic device, the orientation of the electronic device has a top, a bottom, a left side and a right side. It should be understood that in the embodiments of the present application, when the user holds (usually vertically and faces the screen) the electronic device, the orientation of the electronic device has a top, a bottom, a left side and a right side.

[0131] First, four antenna modes to be involved in the present application will be introduced. Among them,

[0132] First, four antenna modes to be involved in the present application will be introduced. Among them, Figures 6 to 9 Figure 6 ​​is a structure of a common mode of an antenna and a distribution diagram of corresponding current, electric field provided by the present application. Figure 7 is a structure of a differential mode of an antenna and a distribution diagram of corresponding current, electric field provided by the present application. Figure 6 and Figure 7 The antenna radiator in the above (a) is open at both ends, and the common mode and the differential mode thereof can be respectively referred to as a line common mode and a line differential mode. Figure 8 is a structure of a common mode of an antenna and a distribution diagram of corresponding current, electric field, magnetic current provided by the present application. Figure 9 is a structure of a differential mode of an antenna and a distribution diagram of corresponding current, electric field, magnetic current provided by the present application. Figure 8 and Figure 9 The antenna radiator in the above (a) is grounded at both ends, and the common mode and the differential mode thereof can be respectively referred to as a slot common mode and a slot differential mode.

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

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

[0135] 1. Line common mode (CM) mode

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

[0137] The middle position 41 of the antenna 40, for example, can be the geometric center of the antenna, or the midpoint of the electrical length of the radiator, for example, the middle position 41 is covered by the connection of the feeding line 42 and the antenna 40.

[0138] Figure 6(b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 6 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 6 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 6 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 6 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 6 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41.

[0139] (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 6 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41.

[0140] 2, line differential mode (DM) mode

[0141] (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 7 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41.

[0142] It should be understood that the "center anti-symmetrical feed" mentioned in the present application can be understood as that the positive and negative poles of the feed unit are connected to the two connection points near the above-mentioned midpoint of the radiating body. In an embodiment, the signal amplitudes output by the positive and negative poles of the feed unit are the same, and the phases are opposite, e.g., the phases are opposite by 180°±10°.

[0143] Figure 7 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 7 (b) of FIG. 1 shows the current, electric field distribution of the antenna 40. As shown in (b) of FIG. 1, the current presents a reverse distribution, e.g., a symmetric distribution, on both sides of the middle position 41; the electric field presents a same direction distribution on both sides of the middle position 41. Figure 7The current at the feed line 52 presents a reverse distribution as shown in (b) of FIG. 6. Based on the current reverse distribution at the feed line 52, Figure 7 This kind of feeding as shown in (a) of FIG. 6 can be referred to as line CM feeding. Based on the current presents a same direction distribution on both sides of the radiating body and the feed line 52 connection, Figure 7 This kind of antenna mode as shown in (b) of FIG. 6 can be referred to as line CM mode (also can be simply referred to as CM mode, for example, for the line antenna, the CM mode refers to the line CM mode). Figure 7 The current, electric field as shown in (b) of FIG. 6 can be respectively referred to as the current, electric field of the line CM mode.

[0144] The current is strong at the middle position 51 of the antenna 50 (the current is large near the middle position 51 of the antenna 50), and is weak at both ends of the antenna 50, as shown in Figure 7 (b) of FIG. 6. The electric field is weak at the middle position 51 of the antenna 50, and is strong at both ends of the line antenna 50.

[0145] It should be understood that for the antenna radiating body, which can be understood as a metal structure that generates radiation, the number can be one, as shown in Figure 6 , or also can be two, as shown in Figure 7 , which can be adjusted according to the actual design or production needs. For example, for the line CM mode, two radiating bodies can also be used as shown in Figure 7 , the two ends of the two radiating bodies are oppositely arranged and spaced apart by a gap, and a symmetric feeding mode is used at the two ends close to each other, for example, the same feed signal is fed into the two ends close to each other of the two radiating bodies, respectively, which can also obtain similar effects as the antenna structure shown in Figure 6 . Correspondingly, for the line DM mode, one radiating body can also be used as shown in Figure 6 , two feed points are arranged at the middle position of the radiating body and an anti-symmetric feeding mode is used, for example, signals with the same amplitude and opposite phase are fed into the two symmetric feed points on the radiating body, respectively, which can also obtain similar effects as the antenna structure shown in Figure 7 .

[0146] 3、Line CM-DM mode

[0147] The above Figure 6 and Figure 7 respectively show the line CM mode and the line DM mode generated by using different feeding modes when the two ends of the radiating body are open.

[0148] When the antenna has an asymmetric feed (the feed point is offset from the middle of the radiator, including edge feed or offset feed), or the antenna has an asymmetric ground (the ground point is offset from the middle of the radiator), the antenna can generate a first resonance and a second resonance simultaneously, corresponding to a line CM mode and a line DM mode respectively. For example, the first resonance corresponds to a line CM mode, and the current and electric field distribution is shown in (b) of FIG. 6A. The second resonance corresponds to a line DM mode, and the current and electric field distribution is shown in (b) of FIG. 6B. Figure 6 Figure 7

[0149] 4. Slot CM mode

[0150] Figure 8 The antenna 60 has a slot or gap 61 in the middle of the radiator, or the antenna 60 and the ground (e.g. the ground plane, which can be a PCB) enclose the slot or gap 61. The slot 61 can be formed by cutting a slot in the ground plane. The slot 61 has an opening 62 on one side, which can be in the middle of the side. The middle of the side can be, for example, the geometric midpoint of the antenna 60, or the midpoint of the electrical length of the radiator. For example, the opening 62 can be formed on a region of the radiator that covers the middle of the side. The opening 62 can be connected to a feed circuit, and the feed can be anti-symmetric. It should be understood that anti-symmetric feed can mean that the positive and negative poles of the feed circuit are connected to the two ends of the radiator respectively. The signals output from the positive and negative poles of the feed circuit have the same amplitude and opposite phase, for example, a phase difference of 180° ± 10°.

[0151] Figure 8 The current, electric field, and magnetic current distribution of the antenna 60 is shown in (b) of FIG. 6A. As shown in (b) of FIG. 6A, the current is distributed in the same direction around the slot 61 on the conductor (e.g. the ground plane, and / or the radiator 60) surrounding the slot 61, the electric field is distributed in opposite directions on the two sides of the middle of the slot 61, and the magnetic current is distributed in opposite directions on the two sides of the middle of the slot 61. As shown in (b) of FIG. 6B, the electric field at the opening 62 (e.g. the feed) is in the same direction, and the magnetic current at the opening 62 (e.g. the feed) is in the same direction. Based on the magnetic current at the opening 62 (the feed) being in the same direction, Figure 8 Figure 8 Figure 8 This kind of feed shown in (a) of FIG. 6A can be referred to as a slot CM feed. Based on the current being distributed in the same direction on the two sides of the opening 62 on the radiator (e.g. anti-symmetric distribution), or based on the current being distributed in the same direction around the slot 61 on the conductor surrounding the slot 61, Figure 8 This kind of antenna mode shown in (b) of FIG. 6A can be referred to as a slot CM mode (which can also be referred to as a CM mode, e.g. for a slot antenna, the CM mode refers to the slot CM mode). Figure 8 The electric field, current, and magnetic current distribution shown in (b) of FIG. 6A can be referred to as the electric field, current, and magnetic current of the slot CM mode.​​​​

[0152] The magnetic field is weaker at the middle of antenna 60 and stronger at both ends. The electric field is stronger at the middle of antenna 60 (the largest electric field is located near the middle of antenna 60) and weaker at both ends. Figure 8 As shown in (b) of the diagram.

[0153] 5. Slot DM Mode

[0154] like Figure 9 The antenna 70 shown in (a) has a slot or slit 72 in its radiator, or the slot or slit 72 may be formed by the radiator of the antenna 70 and ground (e.g., a floor, which may be a PCB). The slot 72 can be formed by slotting in the floor. A feed circuit is connected at the middle position 71 of the slot 72, and symmetrical feeding is used. It should be understood that symmetrical feeding can be understood as one end of the feed circuit being connected to the radiator and the other end being grounded, wherein the connection point between the feed circuit and the radiator (feed point) is located at the center of the radiator, which may be, for example, the midpoint of the geometry, or the midpoint of the electrical length (or a certain area near the aforementioned midpoint). The positive terminal of the feed circuit is connected at the middle position of one side of the slot 72, and the negative terminal of the feed circuit is connected at the middle position of the other side of the slot 72. The middle position of the side of slot 72 can be, for example, the middle position of slot antenna 60 / the middle position of ground, such as the geometric midpoint of slot antenna, or the midpoint of the electrical length of radiator, such as the middle position 51 of the side covered by the connection between the feed circuit and the radiator.

[0155] Figure 9 (b) shows the current, electric field, and magnetic current distribution of antenna 70. Figure 9 As shown in (b), on the conductors (such as the floor and / or radiator 60) surrounding slot 72, the current is distributed around slot 72, and the current is distributed in opposite directions on both sides of the middle position 71. 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 feed circuit is distributed in opposite directions (not shown). Based on the opposite magnetic current distribution at the feed circuit, Figure 9 The type of feed shown in (a) can be called a slot DM feed. This is based on the current exhibiting an opposite distribution (e.g., symmetrical distribution) on both sides of the connection between the feed circuit and the radiator, or based on the current exhibiting an opposite distribution (e.g., symmetrical distribution) around slot 71. Figure 9 The antenna mode shown in (b) can be called slot DM mode (or simply DM mode; for example, for slot antennas, DM mode refers to slot DM mode). Figure 9 The electric field, current, and magnetic current distribution shown in (b) can be referred to as 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 the two ends of the antenna 70. The electric field is stronger in the middle of the antenna 70 (the electric field is larger near the middle of the antenna 60) and weaker at the two ends of the slot antenna 70, as shown in (b) of FIG. 6. Figure 9

[0157] It should be understood that, for the radiator of the antenna, which can be understood as a metal structure (for example, a part of the floor) that generates radiation, can include an opening, as shown in (a) of FIG. 7, or can also be a complete ring, as shown in (b) of FIG. 7, which can be adjusted according to actual design or production needs. For example, for the slot CM mode, a complete ring radiator can also be used, as shown in (a) of FIG. 8, two feed points are arranged in the middle of the radiator on one side of the slot 61, and an anti-symmetrical feeding mode is used, for example, signals with the same amplitude and opposite phases are fed into the two ends of the originally arranged opening position, respectively, and similar effects to the antenna structure shown in (b) of FIG. 6 can also be obtained. Figure 8 Figure 9 Figure 9 Figure 8 Figure 8 Figure 9

[0158] 6. Slot CM-DM mode.

[0159] The above Figure 8 and Figure 9 respectively show that the slot structure uses different feeding modes to generate the slot CM mode and the slot DM mode, respectively.

[0160] When the feeding form of the antenna uses an asymmetric feeding (the feed point deviates from the middle position, including edge feeding or offset feeding), or the opening on one side of the slot is asymmetric (the opening deviates from the middle position of the side), the antenna can simultaneously generate a first resonance and a second resonance, which correspond 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 distributions are shown in (b) of FIG. 6. The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distributions are shown in (b) of FIG. 7. Figure 8 Figure 9

[0161] Since the above antenna structures can generate two working modes (the electric field is symmetrically distributed or anti-symmetrically distributed) with orthogonal electric fields (the electric field is integrated to zero (integrally orthogonal) in the far field), the isolation between the two working modes of such an antenna structure is good, and can be applied to a multi-input multi-output (MIMO) antenna system in an electronic device. ​​​​​​​​​

[0162] Meanwhile, when the two antenna structures respectively operate in two operating modes in which electric fields are orthogonal (the electric fields are integrated orthogonally in a far field (integral orthogonality)), the two antenna structures also have good isolation, and can be used as subunits in a MIMO antenna system in an electronic device.

[0163] It should be understood that the two antenna structures can be understood as antenna structures respectively fed by a first feeding circuit and a second feeding circuit. The first feeding circuit and the second feeding circuit are different. In an 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] Embodiments of the present application provide a foldable electronic device including an antenna. The foldable electronic device includes a first bezel and a second bezel arranged foldably. The antenna has a part of the first bezel as a main radiating branch, and a part of the second bezel as a parasitic branch. The parasitic branch is electrically connected to an electronic element. In a folded state of the foldable electronic device, the parasitic branch generates a first parasitic resonance and a second parasitic resonance, thereby expanding the operating bandwidth of the antenna and improving the communication performance of the foldable electronic device.

[0165] Figure 10 is a schematic diagram of a foldable electronic device 100 provided by embodiments of the present application.

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

[0167] The first housing 201 includes a first bezel 210, and at least a part of the first bezel 210 is arranged spaced apart from the floor 101. The second housing 202 includes a second bezel 220, and at least a part of the second bezel 220 is arranged spaced apart from the floor 101.

[0168] The first bezel 210 includes a first position 211 and a second position 212. The first bezel 210 is provided with a first slit at the first position 211, and the first bezel 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 described by way of example of electrical connection. In actual production or practice, the coupling connection can also be achieved by indirect coupling. For the sake of brevity of the description, no further description is given.

[0170] The second bezel 220 includes a third position 221 and a fourth position 222. The second bezel 220 is provided with a second slit at the third position 221, and the second bezel 220 is coupled to the floor 101 at the fourth position 222.

[0171] The foldable electronic device 100 can 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 rotationally connected with the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other.

[0172] It should be understood that, in the foldable electronic device 100 shown in the figures, Figure 10 In the foldable electronic device 100 shown in the figures, the first rotation shaft 203 is directly connected with the first housing 201 and the second housing 202 respectively, so that the first housing 201 and the second housing 202 can rotate relative to each other. In addition, the "first rotation shaft 203 is rotationally connected with the first housing 201 and the second housing 202 respectively" includes the case that the first rotation shaft 203 can be rotationally connected with the first or second housing through one or more second rotation shafts and one or more intermediate housings. For example, in an embodiment, the foldable electronic device 100 can further include a first rotation shaft and a second rotation shaft, and one or more intermediate housings located between the first rotation shaft and the second rotation shaft. The first rotation shaft is located between the first housing 201 and the intermediate housing, and the first rotation shaft is rotationally connected with the first housing 201 and the intermediate housing respectively, so that the first housing 201 and the intermediate housing can rotate relative to each other. The second rotation shaft is located between the intermediate housing and the second housing 202, and the first rotation shaft 203 is rotationally connected with the intermediate housing and the second housing 202 respectively, so that the intermediate housing and the second housing 202 can rotate relative to each other.

[0173] The foldable electronic device 100 can 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 part of the first bezel 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 part of the second bezel 220 between the third position 221 and the fourth position 222. The length of the second radiator 240 is greater than or equal to one-half of the length of the first radiator 230.

[0176] In an embodiment, 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 ground plate 101, as shown in (a) of FIG. 4. Figure 10

[0177] ​Or, in one embodiment, the second radiator 240 includes a first connection point 241 and a second connection point 242, and a fourth gap is formed on the second bezel 220 between the first connection point 241 and the second 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, as shown in (b) of FIG. 10. Figure 10

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

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

[0180] It should be understood that the second radiator 240 and the first electronic component 252 being configured to generate the second spurious resonance can be understood as the entirety of the second radiator 240 and the first electronic component 252 being configured to generate the second resonance, and the electrical parameters (for example, the electrical length) of the second radiator 240 and the electrical parameters (for example, the equivalent capacitance value or the equivalent inductance value) of the first electronic component 252 directly affect the second spurious resonance (for example, the frequency of the resonance point). In one comparative embodiment, without the first electronic component 252, the resonance point of the second spurious resonance will deviate from the target frequency band by more than a first threshold value, which can be greater than or equal to 200 MHz.

[0181] The first radiator 230 being configured to generate the first resonance and the second radiator 240 being configured to generate the first spurious resonance can be understood as the entirety of the radiator being configured to generate the resonance. At the same time, it should not be understood that other components (for example, the first electronic component 252) are not configured to affect the resonance.

[0182] In one embodiment, the "the second radiator 240 being configured to generate the first spurious resonance" and "the second radiator 240 and the first electronic component 252 being configured to generate the second spurious resonance" can be understood as a whole technical solution, wherein the influence of the first electronic component 252 on the second spurious resonance is greater than the influence on the first spurious resonance. With respect to the scheme of the present application, the resonance point of the second spurious resonance deviates by a frequency difference greater than the frequency difference by which the first spurious resonance deviates. For example, the resonance point of the second spurious resonance deviates by a frequency difference greater than 2 times or more than 5 times the frequency difference by which the first spurious resonance deviates.

[0183] ​It should be understood that the technical solutions provided in the embodiments of the present application can be that, when the foldable electronic device 100 is in the folded state, the first radiator 230 in the antenna 200 serves as a main radiation branch (a branch feeding a signal at a feed point), and the second radiator 240 serves as a parasitic branch (a branch coupling a signal by coupling the main radiation branch). The second radiator 240 can generate a first parasitic resonance and a second parasitic resonance through coupling with the first radiator 230. The resonance frequency of the first parasitic resonance can be determined by the length of the second radiator 240, and the resonance 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 element 252. In an embodiment, the first parasitic resonance and the second parasitic resonance are close 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 element 252. The first resonance, the first parasitic resonance, and the second parasitic resonance can be used to expand the operating bandwidth of the antenna 200 and collectively support one operating frequency band of the foldable electronic device 100.

[0184] In Figure 10 In the illustrated embodiment, the first parasitic resonance is a resonance generated by the second radiator operating in a three-quarter mode, and the second parasitic resonance is a resonance generated by the second radiator operating in a quarter mode.

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

[0186] For the sake of brevity of the discussion, in the embodiments of the present application, only the case where the first end of the main radiation branch is an open end and the second end is a grounded end (the first frame 210 is provided with a gap at the first position 211, and the first frame 210 is coupled to the ground plate 101 at the second position 212) is taken as an example for description. It should be understood that the embodiments of the present application do not limit the distance structure of the main radiation branch. In actual applications, the first end of the main radiation branch can be an open end, and the second end can also be an open end (the first frame 210 is provided with a gap at the first position 211, and the first frame 210 is provided with a gap at the second position 212), as shown in FIG. 6B. Figure 10as shown in (c) of FIG. 1A, or the first end of the main radiation branch is an open end and the second end of the main radiation branch is an open end (the first side frame 210 is coupled with the floor 101 at the first position 211 and the first side frame 210 is coupled with the floor 101 at the second position 212), as shown in (d) of FIG. 1A. Figure 10

[0187] Figure 11 FIG. 1B is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0188] Figure 11 The foldable electronic device 100 shown in FIG. 1B is different from the foldable electronic device 100 shown in FIG. 1A only in the structure of the second radiator 240 in the antenna 200. Figure 10

[0189] The second side frame 220 is provided with a second slot at the third position 221 and a third slot at the fourth position 222, as shown in (a) of FIG. 2A. The second side frame 220 is coupled with the floor 101 at the third position 221 and the fourth position 222, as shown in (b) of FIG. 2A. Figure 11 Figure 11

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

[0191] It should be understood that, when the foldable electronic device 100 is in the folded state, the first radiator 230 in the antenna 200 serves as a main radiation branch (a branch in which a signal is fed in), and the second radiator 240 serves as a parasitic branch (a branch in which a signal is coupled through the main radiation branch). The second radiator 240 can generate a first parasitic resonance and a second parasitic resonance through the coupling with the first radiator 230. The first resonance, the first parasitic resonance and the second parasitic resonance can be used to expand the operating bandwidth of the antenna 200 and collectively support one operating frequency band of the foldable electronic device 100.

[0192] In the embodiment shown in FIG. 3A, 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. Based on the fact that the second side frame 220 is coupled with the floor at the third position 221 and the fourth position 222, the first parasitic resonance and the second parasitic resonance can correspond to the slot CM-DM mode in the above embodiment. Based on the fact that the second side frame 220 is provided with the second slot at the third position 221 and the third slot at the fourth position 222, the first parasitic resonance and the second parasitic resonance can correspond to the line CM-DM mode in the above embodiment. Figure 11

[0193] Figure 12 ​​​​​Fig. 1 is a schematic diagram of a foldable electronic device 100 provided by an embodiment of the present application.

[0194] Figure 12 The foldable electronic device 100 shown in Fig. 1 is different from the foldable electronic device 100 shown in Fig. 2 only in that the first electronic element 252 is arranged at a different position in the antenna 200, and the antenna 200 shown in Fig. 1 is not limited to the structure of the second radiator 240. Figure 10 or Figure 11 The foldable electronic device 100 shown in Fig. 1 is different from the foldable electronic device 100 shown in Fig. 2 only in that the first electronic element 252 is arranged at a different position in the antenna 200, and the antenna 200 shown in Fig. 1 is not limited to the structure of the second radiator 240. Figure 12

[0195] The second radiator 240 includes a first connection point 241, and 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 ground plate 101, as shown in (a) of Fig. 3. Figure 12 At the resonance point of the first parasitic resonance, the second radiator 240 includes an electric field zero point region, which includes an electric field zero point of the second radiator 240 at the resonance point of the first parasitic resonance, and 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. In an embodiment, the first connection point 241 is located in the above-mentioned electric field zero point region.

[0196] Alternatively, the second radiator 240 includes the first connection point 241 and a second electrical connection point 242, and a fourth gap is formed between the first connection point 241 and the second electrical connection point 242 on the second bezel 220. The first end of the first electronic element 252 is coupled to the first connection point 241, and the second end of the first electronic element 252 is coupled to the second connection point 242, as shown in (b) of Fig. 3. Figure 12 At the resonance point of the first parasitic resonance, the second radiator 240 includes a current zero point region, which includes a current zero point of the second radiator 240 at the resonance point of the first parasitic resonance, and the distance between a point in the current zero point region and the current zero point is less than or equal to 5 mm. In an 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 solutions provided by the embodiments of the present application can make the second radiator 240 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 based on different boundary conditions of the second radiator 240 (the second bezel 220 being coupled to the ground plate at the third position 221 or the fourth position 222 or the gap being formed). 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 collectively support one working frequency band of the foldable electronic device 100.

[0198] ​Meanwhile, for different operation modes, the positions of the current zero point region or the electric field zero point region on the second radiator 240 are different at the resonance point of the first parasitic resonance.

[0199] In one embodiment, when the operation mode of the second radiator 240 is the quarter wavelength mode (the second bezel 220 is provided with a gap at the third position 221, and the fourth position 222 is coupled with the floor), the currents on the second radiator 240 are the same, and the second radiator 240 has no current zero point region or electric field zero point region.

[0200] In one embodiment, when the operation mode of the second radiator 240 is the quarter wavelength mode (the second bezel 220 is provided with a gap at the third position 221, and the fourth position 222 is coupled with the floor), the distance between the electric field zero point and the third position 221 is about one third of the length of the second radiator 240, and the distance between the current zero point and the fourth position 222 is about one third of the length of the second radiator 240.

[0201] In one embodiment, when the operation mode of the second radiator 240 is the line DM mode / line CM mode (the second bezel 220 is provided with a gap at the third position 221, and the fourth position 222 is provided with a gap), the electric field zero point is located in the central region of the second radiator 240.

[0202] In one embodiment, when the operation mode of the second radiator 240 is the slot DM mode / slot CM mode (the second bezel 220 is provided with a gap at the third position 221, and the fourth position 222 is coupled with the floor), the current zero point is located in the central region of the second radiator 240.

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

[0204] As Figure 13As shown, the first frame 210 is coupled with the floor 101 at a second position 212 and is provided with a first slit at a first position 211. The first end of the first radiator 230 is an open end and the second end is a grounded end. The second frame 220 is coupled with the floor 101 at a fourth position 222 and is provided with a second slit at a third position 221. The first end of the second radiator 240 is an open end and the second end is a grounded 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 one fifth of the length of the first radiator 230 (the conductive part between the first position 211 and the second position 212). In an 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 slit provided on the frame in the embodiments of the present application can be within the above range.

[0205] The first end of the first electronic element 252 is coupled with the first connection point 241 and the second end is grounded.

[0206] In an embodiment, the second radiator 240 can also be provided with a second feeding point. When the foldable electronic device 100 is in the unfolded state, the second radiator 240 can be fed with an electrical signal by the second feeding point and can serve as a main radiation branch. Meanwhile, in an embodiment, when the foldable electronic device 100 is in the folded state, the second radiator 240 can be fed with an electrical signal by the second feeding point as a main radiation branch of another antenna while serving as a parasitic branch in the antenna 200, and the embodiments of the present application do not limit this.

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

[0208] It should be understood that the electric field zero point can be understood as the position of the electric field zero point generated by the second radiator 240 when the first feeding point 231 feeds the electrical signal, and the electric field reverses on both sides of the position. The electric field zero point corresponds to the current large point (the electric field large point corresponds to the current zero point), and the electric field zero point region can be understood as a region within a certain range from the electric field zero point or the current large point. For example, the electric field zero point region can be understood as a region within 5 mm from the electric field zero point or the current large point. Correspondingly, the current large point region can be understood as a region 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 (current large 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 spurious 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 element 252 is not arranged. In an embodiment, the electric field zero point (current large 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 the second spurious resonance, due to the electrically connected first electronic element 252 between the second radiator 240 and the ground plane, an electric field zero point (current large point) can be generated in the region near the first connection point 241, so that the frequency of the second spurious resonance is raised and approaches the first spurious resonance, so that the first resonance, the first spurious resonance and the second spurious resonance can expand the operating bandwidth of the antenna 200.

[0211] It should be understood that the two resonances approaching described in the embodiments of the present application can be understood as the resonance points of the two resonances being within a certain frequency range. For example, the first spurious resonance approaching the first resonance can be understood as the difference between the resonance points of the first spurious resonance and the resonance points of the first resonance being less than or equal to 200 MHz, and the frequency of the resonance point of the first spurious resonance can be higher than the resonance point of the first resonance, or the frequency of the resonance point of the first spurious 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 spurious resonance, due to the electric field zero point near the first connection point 241, the first electronic element 252 has little effect on the first spurious resonance.

[0213] It should be understood that the first electronic element 252 having little effect on the first spurious resonance can be understood as, when the equivalent capacitance value or the equivalent inductance value of the first electronic element 252 changes, or when the first electronic element 252 is not arranged, the frequency of the resonance point of the first spurious resonance is shifted by a small amount, for example, less than 50 MHz or less than 5% of the frequency of the resonance point.

[0214] In an embodiment, the first electronic element 252 can be a capacitor. The equivalent capacitance value of the first electronic element 252 is greater than 10 pF. In an embodiment, the first electronic element 252 can be an inductor. The equivalent inductance value of the first electronic element 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 capacitor or inductor. In one embodiment, the resonance switching between the first electronic element 252 and the first connection point can also be realized by a tunable device

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

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

[0220] In one embodiment, at the resonance point of the second parasitic resonance, the currents on the second radiator 240 on both sides of the first connection point 241 are opposite.

[0221] It should be understood that for the second parasitic resonance (quarter mode), when the first electronic element 252 is not arranged, the currents on the second radiator 240 are the same. When the first electronic element 252 is arranged, an electric field zero point can be generated near the first connection point 241, and the currents on the second radiator 240 on both sides of the first connection point 241 are opposite. Since the first electronic element 252 has little effect on the first parasitic resonance (three-quarter mode), the currents on the second radiator 240 do not change, and the currents on the second radiator 240 on both sides of the first connection point 241 are the same.

[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 one fifth of the length of the first radiator 230 and less than or equal to one seventh of the length of the first radiator 230, so that the first parasitic resonance is close to the first resonance (the difference between the resonant points of the first parasitic resonance and the first resonance is less than or equal to 200 MHz), expanding the operating bandwidth of the antenna 200.

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

[0226] When the second radiator 240 resonates, an electric field zero point (current maximum 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 element 252 is grounded in the electric field zero point area, and the three-quarter wavelength mode generates an electric field zero point near the first connection point 241, which becomes a new three-quarter wavelength mode. Moreover, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted using the first electronic element 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 element 252 is electrically connected to the ground in this area, and the original three-quarter wavelength mode is hardly affected. Therefore, the antenna 200 can include two three-quarter wavelength modes to expand the operating bandwidth of the antenna.

[0227] In one embodiment, the length of the first radiator between the first feed point 231 and the first position 211 is less than one 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 feed circuit 251 can form an IFA antenna structure. Figure 13 In the illustrated antenna 200, only the IFA formed by the main radiation branch (the first radiator 230) is taken as an example for description, and 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 a first resonance. In one embodiment, the first radiator 230 can operate in a quarter wavelength mode. The electrical length of the first radiator is a quarter of a 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 a working frequency band to expand the working 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 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 the adjacent two resonances of the first resonance, the first parasitic resonance and the second parasitic resonance are connected in the S11 graph, and the S11 of the connected region is less than -4dB, to form a resonance frequency band.

[0232] Figure 14 and Figure 15 is Figure 13 the simulation result graph of the antenna 200 shown in Figure 14 is Figure 13 the S parameter simulation result graph of the antenna 200 shown in Figure 15 is Figure 13 the simulation result of the radiation efficiency and system efficiency of the antenna 200 shown in

[0233] It should be understood that for the sake of brevity of discussion, the embodiments of the present application only take the first electronic element as an inductor, and take 0.2nH as an example for description.

[0234] As Figure 14 shown, the S parameter simulation results of the antenna 200 under different conditions are shown.

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

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

[0237] Case 3: When the foldable electronic device is in a folded state and the first electronic component is set, the antenna can generate three resonances around 0.85 GHz, around 0.9 GHz, and around 0.95 GHz. Two resonances around 0.85 GHz (second parasitic resonance) and around 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] As Figure 15 shown, the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different cases are shown. When the first electronic component is set, due to the introduction of the second parasitic resonance around 0.85 GHz, the radiation efficiency and system efficiency of the antenna are effectively improved.

[0239] Figure 16 and Figure 17 are Figure 13 the schematic diagrams of the electric field and current distributions in the region near the second radiator in the antenna 200 shown. Among them, Figure 16 is Figure 13 the schematic diagram of the electric field and current distributions in the region near the second radiator in the antenna 200 shown at the second parasitic resonance (for example, 0.85 GHz). Figure 17 is Figure 13 the schematic diagram of the electric field and current distributions in the region near the second radiator in the antenna 200 shown at the first parasitic resonance (for example, 0.96 GHz).

[0240] As Figure 16 shown, the second radiator is grounded through the first electronic component at the first connection point, and an electric field zero point (current large point) can be generated near the first connection point. Due to the generation of the electric field zero point (current large point) near the first connection point, on both sides of the first connection point, the current on the second radiator is reversed, 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] As Figure 17 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, and does not change the boundary conditions. The original three-quarter wavelength mode does not change, and the current on the second radiator is in the same direction on both sides of the first connection point.

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

[0243] As Figure 18As shown, the first edge frame 210 is provided with a first slit at a first position 211 and grounded at a second position 212. The first radiating element 230 has an open end at a first end and a grounded end at a second end. The length of the first radiating element between the first feed point 231 and the first position 211 is less than half of the length of the first radiating element between the first position 211 and the second position 212.

[0244] It should be understood that the first radiating element 210 and the first feed circuit 251 can form a structure of a left-handed antenna, which can be, for example, an antenna conforming to a composite right and left handed (CRLH) transmission line structure. The first radiating element 210 and the first feed circuit 251 can form a structure of a right-handed antenna, which can be, for example, an antenna conforming to a conventional transmission line structure. Figure 13 The difference between the antennas 200 shown in FIGS. 1 and 2 is only that the antenna structures formed by the main radiating branch (the first radiating element 230) are different.

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

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

[0247] It should be understood that when the first slit and the second slit are aligned in the first direction, the second slit can be coupled to more energy through the electric field at the first slit when the first feed point 231 feeds the electrical signal, thereby improving the radiation characteristics of the resonance generated by the second radiating element.

[0248] Figure 19 And Figure 20 is Figure 18 The simulation results of the antenna 200 shown in FIG. 1 are shown in FIG. 3. In FIG. 3, Figure 19 is Figure 18 The simulation results of the S parameters of the antenna 200 shown in FIG. 1 are shown in FIG. 4. Figure 20 is Figure 18 The simulation results of the radiation efficiency and system efficiency of the antenna 200 shown in FIG. 1 are shown in FIG. 5.

[0249] It should be understood that, for the sake of brevity of the discussion, the first electronic element in the embodiments of the present application is only a capacitor, and the capacitance value is taken as an example for illustration.

[0250] As Figure 19 shown, the simulation results of the S parameters of the antenna 200 in different cases are shown.

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

[0252] Case 2: When the foldable electronic device is in the folded state and the first electronic element is not provided (the first connection point is not grounded), the antenna can resonate at around 0.86 GHz and around 0.94 GHz. The resonance at around 0.94 GHz (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 element is provided, the antenna can resonate at around 0.86 GHz, around 0.94 GHz, and around 0.98 GHz. The two resonances at around 0.98 GHz (second parasitic resonance) and around 0.94 GHz (first parasitic resonance) can be generated by the second radiator. Meanwhile, the first electronic element does not affect the first parasitic resonance.

[0254] It should be understood that, Figure 18 The difference between the antenna shown in Figure 13 is only that the antenna structure formed by the main radiating branch (the first radiator) is different. Therefore, the provision of the electronic element in series between the parasitic branch (the second radiator) and the ground plane to expand the operating bandwidth of the antenna is not affected by the antenna structure formed by the main radiating branch.

[0255] Meanwhile, when the first electronic element is different, the frequency of the resonance point of the second parasitic resonance can be less than that of the resonance point of the first parasitic resonance (as shown in Figure 14 ), or can be greater than that of the resonance point of the first parasitic resonance (as shown in Figure 19 ).

[0256] As shown in Figure 20 , simulation results of the radiation efficiency and system efficiency of the antenna 200 under different conditions are shown. When the first electronic element is provided, the system efficiency and operating bandwidth of the antenna are effectively improved due to the introduction of the second parasitic resonance at around 0.98 GHz.

[0257] Figure 21 and Figure 22 are Figure 18 the electric field and current distribution diagrams of the area near the second radiator in the antenna 200 shown in Figure 21 , wherein Figure 18 is the electric field and current distribution diagram of the area near the second radiator in the antenna 200 shown in Figure 22 at the first parasitic resonance (for example, 0.94 GHz). Figure 18The electric field and current distribution of the area near the first radiator in the antenna 200 shown at the second parasitic resonance (for example, 0.98 GHz) is shown.

[0258] As shown in Figure 21 , the second radiator is grounded at the first connection point through the first electronic element, the first connection point is located in the electric field zero point area of the first parasitic resonance, the first electronic element is electrically connected with the ground in this area, and the boundary condition is not changed, and the original three-quarter wavelength mode is not changed. 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] As shown in Figure 22 , the second radiator is grounded at the first connection point through the first electronic element, and an electric field zero point (current large point) can be generated near the first connection point. Due to the generation of the electric field zero point (current large point) near the first connection point, on both sides of the first connection point, the current on the second radiator is reversed, and the operating mode corresponding to the second parasitic resonance of the second radiator changes from the quarter wavelength mode to the 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] Figure 23 is another schematic diagram of a foldable electronic device 200 provided by an embodiment of the present application.

[0261] As shown in Figure 23 , the second frame 220 is provided with 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 Figure 23 The antenna 200 shown is different from the antenna 200 shown in Figure 13 only in the structure of the parasitic branch (second radiator 240). In Figure 13 , the first end of the second radiator 240 is an open end, and the second end is a grounded end.

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

[0265] It should be understood that the wavelength provided by the embodiments of the present application can be understood as a vacuum wavelength, and since there is a corresponding relationship between the vacuum wavelength and the medium wavelength, the corresponding wavelength can be determined according to the vacuum wavelength.

[0266] Since both ends of the second radiator 240 are open ends, the operating modes of the second radiator 240 can include a line CM mode and a line DM mode, the second spurious resonance is generated by the CM mode, and the first spurious resonance is generated by the DM mode.

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

[0269] In one embodiment, the length of the second radiator 240 is greater than or equal to two-thirds 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 spurious resonance is close to the first resonance (the difference between the resonance points of the first spurious resonance and the first resonance is less than or equal to 200 MHz), and the operating bandwidth of the antenna 200 is expanded.

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

[0271] It should be understood that the central region can be understood as a local area within a certain range from the geometric center (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) of the second radiator 240, 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 (a large current point) in the central region (a current zero point included in the current and electric field distribution corresponding to the line DM mode), and the central region of the second radiator 240 is an electric field zero point region. Grounding through the first electronic element 252 in the electric field zero point region can generate a new line CM mode. And the frequency of the resonance generated by the new line CM mode can be adjusted by the first electronic element 252. At the same time, since the first connection point 241 is located in the electric field zero point region of the line DM mode, the first electronic element 252 is electrically connected to the ground in this region, and the boundary conditions will not be changed, and the original line DM mode has little effect. Therefore, the antenna 200 can include the line DM mode and the line CM mode to expand the operating bandwidth of the antenna.

[0273] It is understood that the first electronic element 252 has little influence on the line DM mode, which can be understood as that when the equivalent capacitance value or the equivalent inductance value of the first electronic element 252 changes, or when the first electronic element 252 is not arranged, the frequency of the resonance point of the first parasitic resonance generated by the line DM mode is shifted by a small amount, 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 radiating body 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 currents on the second radiating body 240 on both sides of the first connection point 241 are in opposite directions.

[0276] It is understood that when the first electronic element 252 is not arranged, the opposite current on the second radiating body 240 does not occur, and the second parasitic resonance (CM mode) does not occur. When the first electronic element 252 is arranged, an electric field zero point can be generated in the area near the first connection point 241, and the currents on the second radiating body 240 on both sides of the first connection point 241 are in opposite directions, thereby generating the second parasitic resonance (CM mode). Since the first electronic element 252 has little influence on the first parasitic resonance (DM mode), the current on the second radiating body 240 does not change, and the currents on the second radiating body 240 on both sides of the first connection point 241 are in the same direction.

[0277] In one embodiment, the first gap at the first position 211 is aligned with the third gap at the fourth position 222 in the first direction (for example, the z direction).

[0278] It is understood that when the first gap and the third gap partially overlap in the first direction, the third gap can be coupled to more energy through the electric field at the first gap when the first feed point 231 feeds the electrical signal, thereby improving the radiation characteristics of the resonance generated by the second radiating body.

[0279] Figure 24 and Figure 25 is Figure 23 the simulation result diagram of the antenna 200 shown in FIG. 8A. Figure 24 is Figure 23 the simulation result diagram of the S parameter of the antenna 200 shown in FIG. 8B. Figure 25 is Figure 23 the simulation result of the radiation efficiency and the system efficiency of the antenna 200 shown in FIG. 8C.

[0280] As Figure 24 shown in FIG. 9, the simulation results of the S parameter of the antenna 200 in different cases are shown.

[0281] Case 1: When the foldable electronic device is in a folded state and no second radiator is provided, the antenna resonates only with the first radiator around 0.9 GHz.

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

[0283] Scenario 3: When the foldable electronic device is in a folded state and the first electronic component is installed, the antenna can generate three resonances near 0.86 GHz, 0.9 GHz, and 0.95 GHz. The two resonances near 0.86 GHz (the second parasitic resonance) and 0.95 GHz (the first parasitic resonance) can be generated by the second radiator. Meanwhile, the first electronic component does not affect the first parasitic resonance.

[0284] like Figure 25 As shown, simulation results of the radiation efficiency and system efficiency of antenna 200 under different conditions are presented. When the first electronic component is set, the radiation efficiency and system efficiency of the antenna are effectively improved due to the introduction of a second parasitic resonance near 0.86 GHz.

[0285] Figure 26 This is a schematic diagram of another foldable electronic device 100 provided in an embodiment of this application.

[0286] like Figure 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 formed 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 Figure 26 The antenna structure 200 shown is... Figure 18 The only difference between the antenna 200 shown is the connection method between the first electronic component 252 and the second radiator 240.

[0288] Meanwhile, the first electronic element 252 can be used to adjust the equivalent capacitance of the fourth slit, so as to adjust the radiation characteristic (for example, the frequency of the resonance point) of the second parasitic resonance. In an embodiment, the distance between the first connection point 241 and the second electrical connection point 242 and the fourth slit is less than or equal to 5 mm. Herein, the distance between the first connection point 241 and the second electrical connection point 242 and the fourth slit can be understood as the minimum distance between the center of the part of the first connection point 241 and the second electrical connection point 242 in contact with the metal spring and the conductor on both sides of the fourth slit. When the first electronic element 252 is electrically connected to the first connection point 241 and the second electrical connection point 242 through the metal spring, the distance between the first electronic element 252 and the fourth slit can be understood as the minimum distance between the center of the part of the first electronic element 252 in contact with the metal spring and the conductor on both sides of the fourth slit.

[0289] In an embodiment, the first connection point 241 and the second connection point 242 (the fourth slit) can be located in the current zero point area of the second radiator at the resonance point of the first parasitic resonance, so as to raise the frequency of the second parasitic resonance, and make the first parasitic resonance close 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 position on both sides of the current zero point generated by the second radiator when the first feed point 231 feeds in the electrical signal, the current reverses. The current zero point corresponds to the electric field maximum point (the current maximum 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 maximum point. For example, the current zero point area can be understood as the area within 5 mm from the current zero point or the electric field maximum point. Correspondingly, the electric field maximum point area can be understood as the area within a certain range from the current zero point or the electric field maximum point.

[0291] In an embodiment, the current zero point (electric field maximum point) generated by the second radiator included in the above-mentioned current zero point area 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 element 252 is not arranged. In an embodiment, the current zero point (electric field maximum point) generated by the second radiator included in the above-mentioned current zero point area 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 an embodiment, the length of the second radiator 240 is greater than or equal to one fifth of the length of the first radiator 230.

[0293] In an 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 one fifth of the length of the first radiator 230 and less than or equal to seven twentieths of the length of the first radiator 230, so that the first spurious resonance is close to the first resonance (the difference between the frequency of the resonance point of the first spurious resonance and the frequency of the resonance point of the first resonance is less than or equal to 200 MHz), and the operating bandwidth of the antenna 200 is extended.

[0295] It should be understood that the fourth slot formed on the second radiator 240 can increase the radiation aperture of the second radiator 240, thereby improving the radiation characteristics of the antenna 200.

[0296] In one embodiment, the second frame 220 is provided with the second slot 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 one twelfth of the length of the second radiator between the third position 221 and the fourth position 222 (one third + 25%), and greater than or equal to one fourth of the length of the second frame between the third position 221 and the fourth position 222 (one third - 25%), so that the second spurious resonance is close to the first resonance (the difference between the frequency of the resonance point of the second spurious resonance and the frequency of the resonance point of the first resonance is less than or equal to 200 MHz), and the operating bandwidth of the antenna 200 is extended.

[0298] It should be understood that when the second radiator 240 resonates, an electric field maximum 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). The fourth slot is arranged in the electric field maximum point area of the three-quarter wavelength mode, and the three-quarter wavelength mode generates an electric field maximum point near the fourth slot, so that it becomes a new three-quarter wavelength mode. Moreover, the frequency of the resonance generated by the new three-quarter wavelength mode can be adjusted by the first electronic element 252. At the same time, since the fourth slot is located in the electric field maximum point area of the three-quarter wavelength mode, the fourth slot is arranged in this area, and the boundary conditions are not changed, and the original three-quarter wavelength mode has little influence. Therefore, the antenna 200 can include two three-quarter wavelength modes to extend the operating bandwidth of the antenna.

[0299] It should be understood that the little influence of the fourth slot on the three-quarter wavelength mode can be understood as that when the equivalent capacitance value or the equivalent inductance value of the first electronic element 252 changes, or when the first electronic element 252 and the fourth slot are not arranged, the frequency of the resonance point of the resonance generated by the three-quarter wavelength mode (the first spurious resonance) is shifted by a small amount, 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 ground plane is co-directional on both sides of the fourth gap.

[0301] In one embodiment, at the resonance point of the second parasitic resonance, the electric field between the second radiator 240 and the ground plane is reverse on both sides of the fourth gap.

[0302] It should be understood that for the second parasitic resonance (quarter mode), the electric field between the second radiator 240 and the ground plane is co-directional when the fourth gap is not provided. When the first electronic element 252 is provided, the electric field in the region near the fourth gap can be increased, and the electric field between the second radiator 240 and the ground plane is reverse 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 ground plane does not change, and the electric field between the second radiator 240 and the ground plane is co-directional 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 element 252 can be a capacitor or an inductor. When the first electronic element 252 is a capacitor, the equivalent capacitance value is less than 1 pF.

[0305] It should be understood that the first electronic element 252 can be implemented by a distributed device or a lumped device. In one embodiment, when the first electronic element 252 is a capacitor, it can be implemented by a zigzag structure formed by extending the conductor on both sides of the fourth gap into the electronic device, as shown in (a) of FIG. 10. Figure 27 In one embodiment, when the first electronic element 252 is an inductor, a metal piece electrically connected between the first connection point 241 and the second connection point 242 can be equivalent to an inductor, as shown in (b) of FIG. 10. Figure 27

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

[0307] It should be understood that when the first gap and the second gap / fourth gap partially overlap in the first direction, the second gap / fourth gap can be coupled to more energy through the electric field at the first gap when the first feed point 231 feeds the electrical signal, thereby improving the radiation characteristics of the resonance generated by the second radiator.

[0308] ​Figure 28 and Figure 29 is Figure 26 the simulation results of the antenna 200. Among them, Figure 28 is Figure 26 the simulation results of the S parameters of the antenna 200. Figure 29 is Figure 26 the simulation results of the radiation efficiency and system efficiency of the antenna 200.

[0309] As Figure 28 shown, the simulation results of the S parameters of the antenna 200 in different cases are shown.

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

[0311] Case 2: When the foldable electronic device is in a folded state and the first electronic element is not arranged (the fourth gap is not opened), the antenna can resonate at around 0.86 GHz and around 0.94 GHz. The resonance at around 0.94 GHz (first parasitic resonance) can be generated by the second radiator.

[0312] Case 3: When the foldable electronic device is in a folded state and the first electronic element is arranged, the antenna can resonate at around 0.86 GHz, around 0.91 GHz and around 0.97 GHz. The two resonances at around 0.97 GHz (second parasitic resonance) and around 0.91 GHz (first parasitic resonance) can be generated by the second radiator. At the same time, the first electronic element does not affect the first parasitic resonance.

[0313] As Figure 29 shown, the simulation results of the radiation efficiency and system efficiency of the antenna 200 in different cases are shown. When the first electronic element is arranged, due to the introduction of the second parasitic resonance at around 0.97 GHz, the system efficiency and operating bandwidth of the antenna are effectively improved.

[0314] Figure 30 and Figure 31 are the electric field distribution diagrams of the area near the second radiator in the antenna 200 shown in FIG. 24. Among them, Figure 30 is Figure 26 the electric field distribution diagram of the area near the second radiator in the antenna 200 shown in FIG. 24 at the first parasitic resonance (for example, 0.91 GHz). Figure 31 is Figure 26 the electric field distribution diagram of the area near the first radiator in the antenna 200 shown in FIG. 24 at the second parasitic resonance (for example, 0.97 GHz).

[0315] As Figure 30As shown, a fourth gap is disposed between the first and second connection points of the second radiator, and a first electronic component is electrically connected between the first and second connection points. The fourth gap is located in the region of the large electric field point of the first parasitic resonance. Distributing the fourth gap in this region does not change the boundary conditions; the original three-quarter wavelength mode remains unchanged. On both sides of the fourth gap, the electric field between the second radiator and the ground 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 Figure 31 As shown, a fourth gap is provided between the first and second connection points of the second radiator, and a first electronic component is electrically connected between the first and second connection points. A large electric field point (zero current) can be generated near the fourth gap. Due to the large electric field point (zero current) generated near the fourth gap, the electric field between the second radiator and the ground is reversed on both sides of the fourth gap, and the operating 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] Figure 32 This is a schematic diagram of another foldable electronic device 200 provided in the embodiments of this application.

[0318] like Figure 32 As shown, the second frame 220 is grounded at the third position 221 and the fourth position 222. The second radiator 240 has a grounded terminal at both its first and second ends. The second radiator 240 includes a first connection point 241 and a second electrical connection point 242, with a fourth gap formed 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] It should be understood, it should be understood. Figure 32 The antenna 200 shown is Figure 26 The only difference between the antennas 200 shown is the structure of the parasitic stub (second radiator 240). Figure 22 In the antenna 200 shown, the first end of the second radiator 240 is an open end, and the second end is a grounded end. The second radiator 240 forms a wire antenna structure. Figure 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 the wavelength of the first wavelength, which is the wavelength corresponding to the first parasitic resonance.

[0321] It should be understood that the wavelength provided by the embodiments of the present application can be understood as a vacuum wavelength, and since the vacuum wavelength and the medium wavelength have a corresponding relationship, the corresponding wavelength can be determined according to the vacuum wavelength.

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

[0324] In one embodiment, the length of the second radiator 240 is greater than or equal to two-thirds 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 difference between the resonance points of the first parasitic resonance and the first resonance is less than or equal to 200 MHz), and the operating bandwidth of the antenna 200 is expanded.

[0325] It should be understood that the fourth slot formed on the second radiator 240 can improve the radiation aperture of the second radiator 240, thereby improving the radiation characteristics of the antenna 200.

[0326] Since the electrical length of the second radiator 240 is one-half of the first wavelength and both ends are grounded, the operating mode of the second radiator 240 can include the slot CM mode and the slot DM mode in the above embodiments, the 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 (the fourth slot) can be located in the central region of the second radiator 240.

[0328] When the second radiator 240 resonates, an electric field maximum 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 slot formed in the electric field maximum point region can generate a new slot CM mode. Moreover, the frequency of the resonance generated by the new slot CM mode can be adjusted by using the first electronic element 252. At the same time, since the fourth slot is formed in the electric field maximum point region of the slot DM mode, forming the fourth slot in this region does not change the boundary conditions, and the original DM mode has little effect. Therefore, the antenna 200 can include the slot DM mode and the slot CM mode to expand the operating bandwidth of the antenna.

[0329] It should be understood that the fourth slit has little effect on the DM mode, which can be understood as that when the equivalent capacitance value or the equivalent inductance value of the first electronic element 252 changes, or when the first electronic element 252 is not provided and the fourth slit is not provided, the frequency of the resonance point of the first parasitic resonance generated by the slot DM mode is shifted by a small amount, 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 on both sides of the fourth slit is in the same direction.

[0331] In one embodiment, at the resonance point of the second parasitic resonance (CM mode), the electric field between the second radiator 240 and the floor on both sides of the fourth slit is in the opposite direction.

[0332] It should be understood that for the second parasitic resonance (CM mode), when the fourth slit is not provided, the electric field between the second radiator 240 and the floor is in the same direction. When the first electronic element 252 is provided, the region near the fourth slit can generate a large electric field, and the electric field between the second radiator 240 and the floor on both sides of the fourth slit is in the opposite direction. Since the fourth slit 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 on both sides of the first connection point 241 is in the same direction.

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

[0334] It should be understood that when the first slit and the fourth slit partially overlap in the first direction, the fourth slit can be coupled to more energy through the electric field at the first slit when the first feed point 231 feeds the electrical signal, thereby improving the radiation characteristics of the resonance generated by the second radiator.

[0335] Figure 33 and Figure 34 is Figure 32 the simulation result diagram of the antenna 200 shown in FIG. 8A. Figure 33 is Figure 32 the simulation result diagram of the S parameter of the antenna 200 shown in FIG. 8B. Figure 34 is Figure 32 the simulation result of the radiation efficiency and the system efficiency of the antenna 200 shown in FIG. 8C.

[0336] As Figure 33 shown, the simulation results of the S parameter of the antenna 200 in different cases are shown.

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

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

[0339] Scenario 3: When the foldable electronic device is in a folded state and the first electronic component is installed (creating a fourth slit), the antenna can generate three resonances near 0.9 GHz, 0.95 GHz, and 1 GHz. The two resonances near 0.95 GHz (the second parasitic resonance) and 1 GHz (the first parasitic resonance) can be generated by the second radiator. Meanwhile, the first electronic component does not affect the first parasitic resonance.

[0340] like Figure 34 As shown, simulation results of the radiation efficiency and system efficiency of antenna 200 under different conditions are presented. When the first electronic component is set (opening the fourth slot), the radiation efficiency and system efficiency of the antenna are effectively improved due to the introduction of a second parasitic resonance near 1 GHz.

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

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

[0343] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling, direct coupling, or communication connection shown or discussed may be through some interfaces; the direct coupling or communication connection between devices or units may be electrical or other forms.

[0344] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A foldable electronic device, characterized by, Comprising: a first housing, a second housing, and a floor, wherein, the first housing comprises a first bezel, the second housing comprises a second bezel, the first bezel is at least partially spaced apart from the floor, and the second bezel is at least partially spaced apart from the floor; the first bezel comprises a first position and a second position; the second bezel comprises a third position and a fourth position, the second bezel opens a first gap at the third position, and the second bezel is coupled with the floor at the fourth position; a first rotating shaft, the first rotating shaft is located between the first housing and the second housing, and the first rotating shaft is rotatably connected with the first housing and the second housing, respectively; and an antenna, the antenna comprises: a first radiator and a feed circuit, the first radiator is a conductive part of the first bezel between the first position and the second position, the first radiator comprises a feed point, and the feed circuit is coupled with the feed point; and a second radiator and a first electronic element, the second radiator is a conductive part of the second bezel 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; wherein the second radiator comprises a first connection point, a first end of the first electronic element is coupled with the first connection point, and a second end of the first electronic element is coupled with the floor; wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap in a first direction, the first radiator is used to generate a first resonance, an entirety of the second radiator is used to generate a first parasitic resonance, and the entirety of the second radiator and the first electronic element are used to generate a second parasitic resonance, wherein the first direction is a thickness direction of the foldable electronic device.

2. The foldable electronic device of claim 1, wherein, based on the first end of the first electronic element being coupled with the first connection point and the second end of the first electronic element being coupled with the floor, The length LI of the second radiator between the first connection point and the third position and the length L2 of the second radiator between the third position and the fourth position satisfy: L2 / 4≤LI≤5 L2 / 12.

3. The foldable electronic device of claim 2, wherein, an equivalent capacitance value of the first electronic element is greater than 10 pF, or an equivalent inductance value of the first electronic element is less than 5 nH.

4. The foldable electronic device of claim 2 or 3, wherein, at a resonance point of the first parasitic resonance, the second radiator comprises an electric field zero point region, the electric field zero point region comprises an electric field zero point of the second radiator at the resonance point of the first parasitic resonance, a 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 of any one of claims 3 to 4, wherein, at the resonance point of the first parasitic resonance, currents on the second radiator on both sides of the first connection point are in the same direction; at a resonance point of the second parasitic resonance, currents on the second radiator on both sides of the first connection point are in opposite directions.

6. The foldable electronic device of any one of claims 2 to 5, wherein, A 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.

7. The foldable electronic device of any of claims 1-6, wherein: a length of the second radiator is greater than or equal to two-fifths of a length of the first radiator and less than or equal to two-sevenths of the length of the first radiator; A 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.

8. A foldable electronic device, characterized by Comprising: a first housing, a second housing, and a floor, wherein: the first housing comprises a first bezel and the second housing comprises a second bezel, the first bezel is at least partially spaced apart from the floor, and the second bezel is at least partially spaced apart from the floor; the first bezel comprises a first position and a second position; the second bezel comprises a third position and a fourth position; a first hinge between the first housing and the second housing, the first hinge rotationally coupling the first housing and the second housing; and an antenna comprising: a first radiator and a feed circuit, the first radiator is a conductive portion of the first bezel between the first position and the second position, the first radiator comprises a feed point, and the feed circuit is coupled to the feed point; and a second radiator and a first electronic component, the second radiator is a conductive portion of the second bezel between the third position and the fourth position, a length of the second radiator is greater than or equal to three-thirds of a length of the first radiator; wherein the second bezel comprises a first gap and a second gap at the third position and the fourth position, respectively, the second radiator comprises 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, the first connection point is in a central region of the second radiator, and a distance between a point in the central region and a center of the second radiator is less than or equal to 5 mm; or wherein the second bezel is coupled to the floor at the third position and the fourth position, the second radiator comprises a first connection point and a second 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 second connection point, the second radiator comprises a third gap between the first connection point and the second connection point, and the first connection point and the second connection point are in the central region. wherein, based on the foldable electronic device being in a folded state, the first radiator and the second radiator at least partially overlap in a first direction, the first radiator is configured to generate a first resonance, the second radiator is configured to generate a first parasitic resonance, and the second radiator and the first electronic component are configured to generate a second parasitic resonance, and the first direction is a thickness direction of the foldable electronic device.

9. The foldable electronic device of claim 8, wherein: Based on the first end of the first electronic element being coupled with the first connection point and the second end of the first electronic element being coupled with the floor, an equivalent capacitance value of the first electronic element is greater than 10 pF, or an equivalent inductance value of the first electronic element is less than 5 nH.

10. The foldable electronic device of claim 8 or 9, wherein, The second radiator includes a current zero point region when generating the first spurious resonance, the current zero point region including a current zero point when the second radiator generates the first spurious resonance, a distance between a point in the current zero point region and the current zero point being less than or equal to 5 mm, the first connection point and the second connection point being located in the current zero point region.

11. The foldable electronic device of any one of claims 8 to 10, wherein, At a resonance point of the first spurious resonance, currents on the second radiator on both sides of the first connection point are in the same direction; At a resonance point of the second spurious resonance, currents on the second radiator on both sides of the first connection point are in opposite directions.

12. The foldable electronic device of claim 8, wherein, Based on the first end of the first electronic element being coupled with the first connection point and the second end of the first electronic element being coupled with the second connection point, an equivalent capacitance value of the first electronic element is less than 1 pF, or the first electronic element is an inductor.

13. The foldable electronic device of claim 8 or 12, wherein, The second radiator includes a current zero point region when generating the first spurious resonance, the current zero point region including a current zero point when the second radiator generates the first spurious resonance, a distance between a point in the current zero point region and the current zero point being less than or equal to 5 mm, the first connection point and the second connection point being located in the current zero point region.

14. The foldable electronic device of any one of claims 8, 12, or 13, wherein, At a resonance point of the first spurious resonance, electric fields between the second radiator and the floor on both sides of the third gap are in the same direction; At a resonance point of the second spurious resonance, electric fields between the second radiator and the floor on both sides of the third gap are in opposite directions.

15. The foldable electronic device of any one of claims 8 to 14, wherein, A difference between a resonance point of the second spurious resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

16. The foldable electronic device of any one of claims 8 to 15, wherein, A length of the second radiator is greater than or equal to two-thirds of a length of the first radiator and less than or equal to two-fifths of the length of the first radiator; A difference between a resonance point of the second spurious resonance and a resonance point of the first resonance is less than or equal to 200 MHz.

17. A foldable electronic device, characterized by comprising: a first housing, a second housing, and a floor, wherein, The first shell comprises a first frame, and 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 is located between the first shell and the second shell, and the first rotating shaft is rotationally connected with the first shell and the second shell, respectively; and An antenna comprises: A first radiator and a feed 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 feed point, and the feed circuit is coupled with the feed point; and A second radiator and a first electronic element, 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 element are used to generate a second parasitic resonance, wherein the first direction is a thickness direction of the foldable electronic device; Wherein, at a resonance point of the first parasitic resonance, the second radiator comprises an electric field zero point region, the electric field zero point region comprises an electric field zero point of the second radiator at the resonance point of the first parasitic resonance, a distance between a point in the electric field zero point region and the electric field zero point is less than or equal to 5mm, the second radiator comprises a first connection point, a first end of the first electronic element is coupled with the first connection point, and a second end of the first electronic element is coupled with the floor, and the first connection point is located in the electric field zero point region, Or wherein, at a resonance point of the first parasitic resonance, the second radiator comprises a current zero point region, the current zero point region comprises a current zero point of the second radiator at the resonance point of the first parasitic resonance, a distance between a point in the current zero point region and the current zero point is less than or equal to 5mm, the second radiator comprises a first connection point and a second connection point, a first end of the first electronic element is coupled with the first connection point, and a second end of the first electronic element is coupled with the second connection point, the second frame is provided with 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.

18. The foldable electronic device of claim 17, wherein, Based on the first end of the first electronic element being coupled with the first connection point and the second end of the first electronic element being coupled with the floor, at the resonance point of the first parasitic resonance, currents on the second radiator on both sides of the first connection point are in the same direction; At a resonance point of the second parasitic resonance, currents on the second radiator on both sides of the first connection point are in opposite directions.

19. The foldable electronic device of claim 17, wherein, based on a first end of the first electronic component being coupled to the first connection point and a second end of the first electronic component being coupled to the second connection point, at a resonance point of the first spurious resonance, electric fields between the second radiator and the ground plane on both sides of the first slot are in the same direction; at a resonance point of the second spurious resonance, electric fields between the second radiator and the ground plane on both sides of the first slot are in opposite directions.

20. The foldable electronic device of any of claims 17-19, wherein: the first spurious resonance is a resonance generated when the second radiator operates in a three-quarter mode, and the second spurious resonance is a resonance generated when the second radiator operates in a quarter mode; or the first spurious resonance is a resonance generated when the second radiator operates in a differential mode, and the second spurious resonance is a resonance generated when the second radiator operates in a common mode.

21. The foldable electronic device of any of claims 17-20, wherein: a difference between a frequency at a resonance point of the first spurious resonance and a frequency at a resonance point of the first resonance is less than or equal to 200 MHz, and / or a difference between a frequency at a resonance point of the second spurious resonance and the frequency at the resonance point of the first resonance is less than or equal to 200 MHz.

22. The foldable electronic device of any of claims 17-21, wherein: the first resonance, the first spurious resonance, and the second spurious resonance are used to collectively support one operating band of the electronic device. ​

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