Electronic equipment

Abstract

The invention provides electronic equipment. The electronic equipment comprises an antenna. According to the antenna, conductor parts of a frame serve as a first radiator and a second radiator respectively. In the structure of the antenna, the coupling between the second radiating body and the first radiating body is increased by using the coupling connecting piece, so that when the first radiating body generates resonance, part of current extends to the second radiating body, a current path is increased, a radiating aperture is increased, and the antenna has better radiation characteristics (such as radiation efficiency).

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to an electronic device. Background Art

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

[0003] Under the current situation, the communication frequency bands of electronic devices will still coexist with the third-generation mobile communication technology (3G), the fourth-generation mobile communication technology (4G), and the fifth-generation mobile communication technology (5G) frequency bands for a long time, and the number of antennas required is increasing.

[0004] Since the radiator of the antenna has a large size in the low-frequency band, but it is difficult to reserve enough space for the low-frequency antenna in the increasingly tense layout space. When the size of the radiator is limited, how to improve the efficiency of the antenna has become an urgent task. Summary of the Invention

[0005] This application provides an electronic device, including an antenna. The antenna uses the conductor part of the frame as a radiator, and a coupling connector is used to couple the current paths on the adjacent conductor extended radiators, thereby improving the efficiency of the antenna.

[0006] In a first aspect, an electronic device is provided, including: a floor; a frame, the frame including a first position, a second position, and a third position arranged in sequence, the frame having a first insulating gap and a second insulating gap opened at the first position and the second position respectively, the frame being coupled to the floor at the third position, the frame including a first side and a second side intersecting at an angle, the first position being located on the first side, and the second position and the third position being located on the second side; an antenna, the antenna including: a first radiator and a second radiator, the first radiator including a conductive portion of the frame between the first position and the second position, the second radiator including a conductive portion of the first frame between the second position and the third position, the length D1 of the first radiator and the length D2 of the second radiator satisfying (1 / 16)×D1 ≤ D2 ≤ (1 / 3)×D1, both the first radiator and the second radiator being spaced apart from the floor; a coupling connector, a first end of the coupling connector extending towards the first radiator and being spaced apart from the first radiator, a second end of the coupling connector being connected to a first end of the second radiator, a first end of the first radiator and a first end of the second radiator being opposite and non-contact through the second insulating gap; a feeding circuit, the first radiator including a feeding point, the feeding circuit being coupled to the feeding point, the feeding circuit being configured to feed a radio frequency signal of a first frequency band into the first radiator, and the first radiator being configured to generate a first resonance corresponding to the first frequency band.

[0007] According to an embodiment of the present application, when the first radiator generates resonance, part of the current extends to the second radiator, increasing the current path by two times. Due to the provision of the coupling connector, the coupling amount between the second radiator and the first radiator can be further increased, more current can be coupled and generated on the second radiator, the current path is further increased, the radiation aperture of the antenna can be increased, and thus the antenna has better radiation characteristics (for example, improving the radiation efficiency of the antenna). The second radiator does not generate resonance within the first frequency band, and only improves the radiation characteristics (for example, radiation efficiency) of the antenna by extending the current path.

[0008] Moreover, since the second end of the second radiator is a grounded end, the current coupled to the second radiator can further excite the longitudinal mode of the floor, thereby improving the radiation characteristics of the antenna (for example, improving the radiation efficiency of the antenna).

[0009] At the same time, since part of the first radiator is located on the first side and part is located on the second side, when the first radiator generates resonance, it can excite the transverse mode and longitudinal mode generated by the floor, thereby improving the radiation characteristics (for example, bandwidth) of the antenna 200.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the second radiator and the coupling connection member are configured to extend the current on the first radiator, enhancing the radiation of the antenna in the first frequency band.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the coupling connection member is located between the ground plane and the frame.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the electronic device further includes a middle plate and a battery, the battery is located on the middle plate, and the middle plate serves as at least a part of the ground plane; wherein, the coupling connection member is located between the battery and the frame.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the coupling connection member and the frame are integrally formed.

[0014] According to the embodiments of the present application, the coupling connection member and the frame can be milled from the same metal part, thereby reducing the error during assembly and enhancing the radiation characteristics (e.g., bandwidth) of the antenna.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the electronic device includes a first housing, a second housing, and a rotating shaft, the rotating shaft is located between the first housing and the second housing, and the rotating shaft is rotatably connected to the first housing and the second housing respectively; the first housing includes the frame; the distance between the third position and the rotating shaft is less than or equal to 20 mm.

[0016] According to the embodiments of the present application, the structure of the antenna can also be applied to foldable electronic devices. Since the length of the frame in the area near the rotating shaft is limited, the current path of the radiator can be increased through the structure of the coupling connection member, enhancing the radiation characteristics of the antenna.

[0017] In combination with the first aspect, in certain implementations of the first aspect, based on the electronic device being in the unfolded state, the length of the electronic device is greater than or equal to three - halves of the width of the electronic device.

[0018] According to the embodiments of the present application, in foldable electronic devices, for example, in "small - fold" electronic devices (in the unfolded state, the length of the electronic device is greater than or equal to 1.5 times the width), the layout space is more compact. The technical solution provided by the embodiments of the present application can be arranged adjacent to the rotating shaft 403 and still have good radiation characteristics.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the first frequency band is a communication frequency band in the range of 698 MHz - 960 MHz.

[0020] According to the embodiments of the present application, for the low-frequency band, the corresponding radiator has a relatively large size. However, in the current development trend of the ID of electronic devices, it is difficult to reserve enough space for the low-frequency antenna. When the length of the radiator is limited, it is impossible to improve the radiation characteristics (such as radiation efficiency) of the antenna by extending the size of the first radiator.

[0021] In the technical solution provided by the embodiments of the present application, without increasing the length of the radiator (the overall length is less than half of the wavelength), the coupling amount between the second radiator and the first radiator can be increased by using the coupling connector, so that the two radiators have the characteristic of strong coupling, thereby extending the current path and improving the radiation characteristics (such as radiation efficiency) of the antenna.

[0022] Combined with the first aspect, in some implementation manners of the first aspect, the distance D between the first radiator and the coupling connector in the first direction is less than or equal to 2 mm, and the first direction is perpendicular to the extending direction of the second side.

[0023] Combined with the first aspect, in some implementation manners of the first aspect, the size of the coupling connector in the second direction is greater than or equal to 3 mm and less than or equal to 12 mm, and the second direction is the extending direction of the second side.

[0024] Combined with the first aspect, in some implementation manners of the first aspect, the size of the coupling connector in the first direction is less than or equal to 2 mm, and the first direction is perpendicular to the extending direction of the second side.

[0025] Combined with the first aspect, in some implementation manners of the first aspect, the size of the coupling connector in the third direction is greater than or equal to 0.5 mm and less than or equal to 2 mm, and the third direction is the thickness direction of the electronic device.

[0026] According to the embodiments of the present application, when the size of the coupling connector is within the above range, there is a good coupling amount between the second radiator and the first radiator, so that the antenna has good radiation characteristics (such as radiation efficiency, etc.).

[0027] Combined with the first aspect, in some implementation manners of the first aspect, the coupling connector does not overlap with the ground plane in the third direction, and the third direction is the thickness direction of the electronic device.

[0028] Combined with the first aspect, in some implementation manners of the first aspect, the capacitance value of the equivalent capacitance formed between the coupling connector and the first radiator is greater than or equal to 0.4 pF and less than or equal to 2.4 pF.

[0029] According to an embodiment of the present application, by adjusting the capacitance value of the equivalent capacitance formed between the coupling connector and the first radiator, the coupling amount between the second radiator and the first radiator can be controlled, so that when the first radiator generates resonance, the current on the second radiator can be changed, enabling the antenna to have different radiation characteristics (for example, resonance point frequency, radiation efficiency, etc.). In combination with the first aspect, in some implementation manners of the first aspect, the antenna further includes a grounding connector, the first radiator includes a grounding point, the first end of the grounding connector is coupled to the grounding point, the second end of the grounding connector is coupled to the ground plane, and the grounding connector is inductive.

[0030] According to an embodiment of the present application, the first radiator is coupled to the ground plane through an inductive grounding connector, and can simultaneously generate a line CM mode and a line DM mode, and utilize the two modes to generate resonance respectively, thereby expanding the bandwidth of the antenna.

[0031] When the coupling connector is not provided, the electric fields generated by the line CM mode and the line DM mode both have strong components at the first insulating gap (the first position), and the mutual coupling between the electric fields generated by the two modes is strong, resulting in poor compatibility between the line CM mode and the line DM mode. Since the coupling connector is provided, the electric field generated by the line DM mode can be dispersed, so that it also has a strong component at the second insulating gap (the second position), thereby weakening the intensity of the electric field generated by the line DM mode at the first insulating gap (the first position), improving the compatibility between the line CM mode and the line DM mode, and enabling the antenna to have better radiation characteristics (for example, radiation efficiency).

[0032] In combination with the first aspect, in some implementation manners of the first aspect, the first radiator is configured to generate a first resonance and a second resonance, and the first resonance and the second resonance are used to jointly support the first frequency band.

[0033] In combination with the first aspect, in some implementation manners of the first aspect, the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance, the length of the first radiator is less than half of the first wavelength, and the first wavelength is the wavelength corresponding to the second resonance.

[0034] In combination with the first aspect, in some implementation manners of the first aspect, the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance, and the length of the conductive part between the first position and the third position is less than half of the first wavelength, and the first wavelength is the wavelength corresponding to the second resonance.

[0035] According to the embodiments of the present application, without increasing the length of the radiator (the overall length is less than half of the wavelength), the coupling connector can be used to increase the coupling amount between the second radiator and the first radiator, so that the two radiators have the characteristic of strong coupling, thereby extending the current path and improving the radiation characteristics of the antenna (for example, radiation efficiency).

[0036] Combined with the first aspect, in some implementation manners of the first aspect, the equivalent inductance value of the grounding connector is less than or equal to 6.2 nH.

[0037] According to the embodiments of the present application, when the equivalent inductance value of the grounding connector is within the above interval, the current transmitted on the grounding connector during the resonance of the first radiator can be adjusted, thereby adjusting the radiation characteristics of the antenna (for example, the frequency of the resonance point).

[0038] Combined with the first aspect, in some implementation manners of the first aspect, the coupling connector, the grounding connector and the frame are integrally formed.

[0039] Combined with the first aspect, in some implementation manners of the first aspect, the length of the conductive part between the first position and the second position is less than 100 mm.

[0040] Combined with the first aspect, in some implementation manners of the first aspect, the ratio of the length of the first radiator on the first side to the length of the first radiator on the second side is greater than or equal to 0.3 and less than or equal to 3. Description of the Drawings

[0041] Figure 1 is a schematic diagram of an electronic device 10 provided by the embodiments of the present application.

[0042] Figure 2 is a distribution diagram of the structure, corresponding current, electric field, and magnetic current of the common-mode mode of the antenna provided by the embodiments of the present application.

[0043] Figure 3 is a distribution diagram of the structure, corresponding current, electric field, and magnetic current of the differential-mode mode of the antenna provided by the embodiments of the present application.

[0044] Figure 4 is a schematic diagram of an electronic device 10 provided by the embodiments of the present application.

[0045] Figure 5 is a schematic diagram of an electronic device 10 provided by the embodiments of the present application.

[0046] Figure 6 is a schematic diagram of an electronic device 10 provided by the embodiments of the present application.

[0047] Figure 7It is a schematic diagram of an electronic device 10 provided by an embodiment of the present application.

[0048] Figure 8 It is a schematic diagram of an electronic device 10 provided by an embodiment of the present application.

[0049] Figure 9 It is Figure 5 The S-parameter simulation result of the antenna 200 in the electronic device 10 shown.

[0050] Figure 10 It is Figure 5 The simulation results of the radiation efficiency and system efficiency of the antenna 200 in the electronic device 10 shown.

[0051] Figure 11 It is Figure 5 The schematic diagram of the current distribution of the antenna 200 in the electronic device 10 shown in the online CM mode.

[0052] Figure 12 It is Figure 5 The schematic diagram of the current distribution of the antenna 200 in the electronic device 10 shown in the online DM mode. Detailed implementation manners

[0053] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0054] It should be understood that the term "and / or" used herein is merely a description of the same fields of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0055] For the range used in the present application, unless otherwise specified as not including the end values, it is default to include the two end values of the range. For example, in the range of 1 to 5, the two values of 1 and 5 are included.

[0056] Coupling: It can be understood as direct coupling and / or indirect coupling. "Coupled connection" can be understood as direct coupled connection and / or indirect coupled connection. Direct coupling can also be referred to as "electrical connection", which is understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as copper foils or wires of a printed circuit board (PCB) that can transmit electrical signals. "Indirect coupling" can be understood as electrical conduction between two conductors in a non-contact manner. In one embodiment, indirect coupling can also be referred to as capacitive coupling. For example, signal transmission is achieved by forming an equivalent capacitance through the coupling between the gaps between two conductive members.

[0057] Components / devices: Include at least one of lumped components / devices and distributed components / devices.

[0058] Lumped components / devices: Refers to the general term for all components when the size of the component is much smaller than the wavelength corresponding to the operating frequency of the circuit. For a signal, at any moment, the characteristics of the component always remain fixed and are independent of frequency.

[0059] Distributed components / devices: Different from lumped components, when the size of the component is about the same as or larger than the wavelength corresponding to the operating frequency of the circuit, when a signal passes through the component, the characteristics of each point of the component itself will vary with the change of the signal. At this time, the component as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed component.

[0060] Capacitance: Can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitance) refers to the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0061] Inductance: Can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductor elements; distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a conductive part of a certain length.

[0062] Radiator: Is a device in an antenna used to receive / transmit electromagnetic wave radiation. In some cases, "antenna" is narrowly understood as a radiator, which converts the guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy, for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted through the feeder to the transmitting radiator, and through the radiator, it is converted into electromagnetic wave energy of a certain polarization and radiated in the required direction. The receiving radiator converts the electromagnetic wave energy of a certain polarization from a specific direction in space back into modulated high-frequency current energy and transmits it through the feeder to the input end of the receiver.

[0063] The radiator may include a conductor with a specific shape and size, such as linear, sheet-like, etc. The present application does not limit the specific shape. In one embodiment, the linear radiator may be simply referred to as a wire antenna. In one embodiment, the linear radiator may be implemented by a conductive frame and may also be referred to as a frame antenna. In one embodiment, the linear radiator may be implemented by a support conductor and may also be referred to as a support antenna. In one embodiment, the wire diameter (e.g., including thickness and width) of the linear radiator, or the radiator of the wire antenna, is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length can be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of wire antennas include dipole antennas, half-wave dipole antennas, monopole antennas, loop antennas, inverted-F antennas (also known as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feeding part from the feeding end of the radiating branch. For example, an inverted-F antenna (Inverted-F Antenna, IFA) can be regarded as obtained by adding a grounding path to a monopole antenna. The IFA antenna has a feeding point and a grounding point and is called an inverted-F antenna because its side view is in the shape of an inverted F. In one embodiment, the sheet radiator may include a microstrip antenna, or a patch antenna, such as a planar inverted-F antenna (also known as PIFA, Planar Inverted F Antenna). In one embodiment, the sheet radiator may be implemented by a planar conductor (such as a conductive sheet or a conductive coating, etc.). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet, etc. In one embodiment, the sheet radiator may include a conductive coating, such as silver paste, etc. The shape of the sheet radiator includes circular, rectangular, annular, etc. The present application does not limit the specific shape. The structure of a microstrip antenna generally consists of a dielectric substrate, a radiator, and a ground plane, where the dielectric substrate is disposed between the radiator and the ground plane.

[0064] The radiator may also include a slot or a slit formed on a conductor. For example, a closed or semi-closed slot or slit is formed on a grounded conductor surface. In one embodiment, the slotted or slit radiator may be simply referred to as a slot antenna or a slit antenna. In one embodiment, the radial dimension (e.g., including the width) of the slot or slit of the slot antenna / slit antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiator with a closed slot or slit may be simply referred to as a closed slot antenna. In one embodiment, the radiator with a semi-closed slot or slit (e.g., adding an opening to the closed slot or slit) may be simply referred to as an open slot antenna. In some embodiments, the shape of the slit is elongated. In some embodiments, the length of the slit is about half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the slit is about an integer multiple of the wavelength (e.g., one dielectric wavelength). In some embodiments, the slit can be fed by a transmission line bridging one or both of its sides. Thus, a radio frequency electromagnetic field is excited on the slit, and electromagnetic waves are radiated into space. In one embodiment, the radiator of the slot antenna or the slit antenna can be implemented by a conductive frame grounded at both ends, and can also be referred to as a frame antenna; in this embodiment, it can be considered that the slot antenna or the slit antenna includes a linear radiator, the linear radiator is spaced from the floor and grounded at both ends of the radiator, so as to form a closed or semi-closed slot or slit. In one embodiment, the radiator of the slot antenna or the slit antenna can be implemented by a support conductor grounded at both ends, and can also be referred to as a support antenna.

[0065] The feeding circuit is a combination of all circuits for receiving and transmitting radio frequency signals. The feeding circuit may include a transceiver and a radio frequency front-end circuit (RF front end). In some cases, "feeding circuit" is narrowly understood as a radio frequency integrated circuit (RFIC), and the RFIC can be considered to include a radio frequency front-end chip and a transceiver. The feeding circuit has the function of converting radio waves (e.g., radio frequency signals) and electrical signals (e.g., digital signals). Generally, it is considered to be part of the radio frequency.

[0066] In some embodiments, the electronic device may further include a test socket (or referred to as a radio frequency socket or a radio frequency test socket). This test socket can be used to insert a coaxial cable to test the characteristics of the radio frequency front-end circuit or the radiator of the antenna through the cable. The radio frequency front-end circuit can be considered as the circuit part coupled between the test socket and the transceiver.

[0067] In some embodiments, the radio frequency front-end circuit can be integrated into a radio frequency front-end chip in an electronic device, or the radio frequency front-end circuit and the transceiver can be integrated into a radio frequency chip in the electronic device.

[0068] It should be understood that any two of the first / second / ... / Nth feeding circuits in the present application can share the same transceiver. For example, signals can be transmitted through a radio frequency channel in a transceiver (e.g., a port (pin) of a radio frequency chip); they can also share a radio frequency front-end circuit. For example, signals can be processed by a switch or an amplifier in a radio frequency front-end.

[0069] It should also be understood that two of the first / second / ... / Nth feeding circuits in the present application generally correspond to two radio frequency test sockets in an electronic device.

[0070] The matching circuit is a circuit for adjusting the radiation characteristics of an antenna. In one embodiment, the matching circuit is coupled between the feeding circuit and the corresponding radiator. In one embodiment, the matching circuit is coupled between the test socket and the radiator. Generally, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In one embodiment, the matching circuit can include a switch and / or electronic components. The switch can be an electronic component for switching the coupled connection of the radiator. The matching circuit has the functions of impedance matching and / or frequency tuning. Generally, it is considered to be part of the antenna.

[0071] The grounding structure / feeding structure can include a connecting member, such as a metal spring piece. The radiator is coupled to the ground plane through the grounding structure / the feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure can include a transmission line / feeding wire, and the grounding structure can include a grounding wire.

[0072] End / point: The "end / point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / connection point of the antenna radiator should not be narrowly understood as necessarily being an end point or end part physically disconnected from other radiators. It can also be considered as a certain point or a certain section on a continuous radiator. In one embodiment, the "end / point" can include a connection / coupling area on the antenna radiator for coupling to other conductive structures. For example, the feeding end / feeding point can be a coupling area on the antenna radiator for coupling to the feeding structure (e.g., an area facing a part of the feeding structure), and for another example, the grounding end / grounding point can be a connection / coupling area on the antenna radiator for coupling to the grounding structure.

[0073] Open end, closed end: In some embodiments, the open end and the closed end are, for example, defined relative to whether they are grounded. The closed end is grounded and the open end is not grounded. In some embodiments, the open end and the closed end are, for example, defined 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 one embodiment, the open end can also be referred to as a floating end, a free end, an open end, or an open circuit end. In one embodiment, the closed end can also be referred to as a grounded end or a short circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled to the open end to transfer coupled energy (which can be understood as transferring current).

[0074] In some embodiments, the understanding of the "closed end" can also be from the perspective of current distribution. The closed end or the grounded end, etc., can be understood as the current maxima on the radiator or the electric field minima on the radiator; in one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the closed end can not change the current distribution characteristics of its current maxima / electric field minima; in one embodiment, opening a slit (such as a slit filled with an insulating material) at or near the closed end can not change the current distribution characteristics of its current maxima / electric field minima.

[0075] In some embodiments, the understanding of the "open end" can also be from the perspective of current distribution. The open end or the floating end, etc., can be understood as the current minima on the radiator or the electric field maxima on the radiator; in one embodiment, coupling electronic devices (such as capacitors, inductors, etc.) through the open end can not change the current distribution characteristics of its current minima / electric field maxima.

[0076] It should be understood that coupling an electronic device (such as a capacitor, an inductor, etc.) to the radiator end at a slit (from the structure of the radiator, similar to the opening of an open end or a floating end) can make the radiator end the current maxima / electric field minima. In this case, it should be understood that the radiator end at the slit is actually the closed end or the grounded end, etc.

[0077] The "floating radiator" mentioned in the embodiments of the present application refers to a radiator that is not directly connected to the feeder / feeding stub and / or the ground wire / grounding stub, but is fed and / or grounded through an indirect coupling method.

[0078] It should be understood that the "floating" in the "floating end" and the "floating radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the floating radiator can be, for example, a radiator disposed on the inner surface of an insulating rear cover.

[0079] Clearance: It refers to the distance between the radiator of the antenna and the metal or electronic components close to the radiator. For example, when a part of the metal frame of an electronic device serves as the radiator of the antenna, the clearance can refer to the distance between the radiator and the printed circuit board or electronic components (such as a camera).

[0080] The same / different directions of the current mentioned in the embodiments of the present application should be understood as the directions of the main currents on the conductors on the same side being the same / different. For example, when exciting the same-direction distributed current on a bent or loop-shaped conductor (for example, the current path is also bent or loop-shaped), it should be understood that, for example, although the main currents excited on the two sides of the loop-shaped conductor (for example, the conductors around a gap, on the conductors on both sides of the gap) seem to be in opposite directions, it still belongs to the definition of the same-direction distributed current in the embodiments of the present application. In one embodiment, the same direction of the current on a conductor can mean that there is no reverse point in the current on the conductor. In one embodiment, the reverse direction of the current on a conductor can mean that there is at least one reverse point in the current on the conductor. In one embodiment, the same direction of the currents on two conductors can mean that there is no reverse point in the currents on both conductors and they flow in the same direction. In one embodiment, the reverse direction of the currents on two conductors can mean that there is no reverse point in the currents on both conductors and they flow in opposite directions. The same / different directions of the currents on multiple conductors can be understood accordingly.

[0081] The same / different directions of the electric field mentioned in the embodiments of the present application should be understood as the directions of the main electric fields generated by the conductors in space (for example, the electric field between the conductor and the floor) being the same / different. For example, when exciting the same-direction distributed electric field on a bent or loop-shaped conductor (for example, the gap formed between the floor and the conductor is also bent or loop-shaped), it should be understood that, for example, the directions of the electric fields in the gap are all from the floor to the conductor, or from the conductor to the floor. Although the main electric fields excited in the gaps on both sides of the loop-shaped conductor (for example, the conductors around a gap, in the gaps on both sides of the gap) seem to be in opposite directions, it still belongs to the definition of the same-direction distributed electric field in the embodiments of the present application. In one embodiment, the same direction of the electric field between a conductor and the floor can mean that there is no reverse point in the electric field between the conductor and the floor. In one embodiment, the reverse direction of the electric field between a conductor and the floor can mean that there is at least one reverse point in the electric field between the conductor and the floor. In one embodiment, the same direction of the electric fields between two conductors and the floor can mean that there is no reverse point in the electric fields between both conductors and the floor and they radiate in the same direction (for example, the positive direction of the z-axis). In one embodiment, the reverse direction of the electric fields between two conductors and the floor can mean that there is no reverse point in the electric fields between both conductors and the floor and they flow in opposite directions. The same / different directions of the electric fields between multiple conductors and the floor can be understood accordingly.

[0082] Resonance / Resonant Frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range where resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point. The return loss characteristic of the center frequency can be less than -20 dB. It should be understood that unless otherwise specified, when the antenna / radiator mentioned in this application generates "the first / second... resonance", the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or in other words, the resonance with the lowest frequency generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to the specific design, and each antenna mode can correspondingly generate a fundamental mode resonance.

[0083] Resonant Frequency Band: The range of the resonant frequency is the resonant frequency band, and the return loss characteristic of any frequency point within the resonant frequency band can be less than -6 dB or -5 dB.

[0084] Communication Frequency Band / Operating Frequency Band: No matter what type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna that supports Band B40 has an operating frequency band including frequencies in the range of 2300 MHz to 2400 MHz, or in other words, the operating frequency band of this antenna includes Band B40. The frequency range that meets the index requirements can be regarded as the operating frequency band of the antenna.

[0085] The resonant frequency band and the operating frequency band can be the same or can partially overlap. In one embodiment, one or more resonant frequency bands of the antenna can cover one or more operating frequency bands of the antenna.

[0086] Electrical Length: It can refer to the ratio of the physical length (i.e., the mechanical length or geometric length) to the wavelength of the electromagnetic wave transmitted, and the electrical length can satisfy the following formula:

[0087]

[0088] where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0089] Wavelength: Or the operating wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming the center frequency of the B1 uplink frequency band (resonant frequency from 1920 MHz to 1980 MHz) is 1955 MHz, then the operating wavelength can be the wavelength calculated using this frequency of 1955 MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non - center frequency of the resonant frequency or the operating frequency band.

[0090] It should be understood that the wavelength of the radiation signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3×10^8 m / s. The wavelength of the radiation signal in a medium can be calculated as follows: Where ε is the relative dielectric constant of the medium. The wavelength in the embodiments of the present application generally refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency or the medium wavelength corresponding to the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency from 1920 MHz to 1980 MHz) is 1955 MHz, the wavelength can be the medium wavelength calculated using this frequency of 1955 MHz. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to a non-center frequency of the resonant frequency or the operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one side or multiple sides of the radiator.

[0091] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is characterized.

[0092] Antenna system efficiency (total efficiency): It refers to the ratio of the input power to the output power at the port of the antenna.

[0093] Antenna radiation efficiency: It refers to the ratio of the power radiated by the antenna into space (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power, the ohmic loss power of the metal, and / or the dielectric loss power. The radiation efficiency is a value measuring the radiation ability of the antenna, and both the metal loss and the dielectric loss are influencing factors of the radiation efficiency.

[0094] Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0 dB, the better the efficiency of the antenna is characterized.

[0095] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmitted power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the smaller the radiation efficiency of the antenna.

[0096] The antenna return loss can be represented by the S11 parameter, and S11 is one of the S parameters. S11 represents the reflection coefficient, and this parameter can characterize the quality of the antenna transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the smaller the energy reflected back by the antenna itself, which means that in fact, the more energy enters the antenna, and the higher the system efficiency of the antenna; the larger the S11 parameter, the larger the antenna return loss, and the lower the system efficiency of the antenna.

[0097] It should be noted that in engineering, generally, the S11 value of -6 dB is used as the standard. When the S11 value of the antenna is less than -6 dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is good.

[0098] Ground (floor) (GND): It can generally refer to at least a part of any ground layer, ground plane, 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, ground plane, or ground component. "Ground" can be used for grounding components in an electronic device. In one embodiment, "ground" can be the ground layer of the circuit board of the electronic device, or the ground plane formed by the middle frame of the electronic device or the ground metal layer formed by the metal film under the screen. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12 - 14-layer board with 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric layers or insulating layers such as fiberglass, polymers, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a trace layer, and the trace layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on the circuit board or connected to the circuit board; or electrically connected to the trace layer and / or the ground layer in the circuit board. For example, a radio frequency source is arranged on the trace layer.

[0099] Any of the above ground layer, ground plane, or ground metal layer is made of a conductive material. In one embodiment, the conductive material can be any one of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate, and tin-plated copper, cloth impregnated with graphite powder, a substrate coated with graphite, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art can understand that the ground layer / ground plane / ground metal layer can also be made of other conductive materials.

[0100] Grounding: It refers to coupling with the above-mentioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, for example, through some structural components of the middle frame to achieve physical grounding at specific positions on the border (or referred to as physical ground). In one embodiment, grounding can be achieved through device grounding, for example, through devices such as capacitors / inductors / resistors connected in series or in parallel for grounding (or referred to as device ground).

[0101] Next, the technical solutions of the embodiments of the present application will be described with reference to the accompanying drawings.

[0102] As Figure 1 shown, the electronic device 10 may include: a cover 13, a display / display module 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, the cover 13 may be a cover glass, or may be replaced by a cover made of other materials, such as a cover made of PET (Polyethylene terephthalate) material, etc.

[0103] Among them, the cover 13 may be disposed closely to the display module 15, and may mainly be used to protect the display module 15 and prevent dust.

[0104] In one embodiment, the display module 15 may include a liquid crystal display (LCD) panel, a light emitting diode (LED) display panel, an organic light-emitting diode (OLED) display panel, etc., and the embodiments of the present application do not limit this.

[0105] The middle frame 19 mainly plays a supporting role for the whole machine. Figure 1As shown, the PCB 17 is disposed between the middle frame 19 and the rear cover 21. It should be understood that in one embodiment, the PCB 17 may also be disposed between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. Among them, the printed circuit board PCB 17 may adopt a flame-retardant material (FR-4) dielectric board, or a Rogers dielectric board, or a hybrid dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code for a flame-retardant material grade, and the Rogers dielectric board is a high-frequency board. Electronic components are carried on the PCB 17, for example, radio frequency chips and the like. In one embodiment, a metal layer may be provided on the printed circuit board PCB 17. This metal layer can be used for grounding the electronic components carried on the printed circuit board PCB 17, and can also be used for grounding other components, such as a bracket antenna, a frame antenna, etc. This metal layer can be called a floor, or a ground plane, or a ground layer. In one embodiment, this metal layer can be formed by etching metal on the surface of any layer of dielectric board in the PCB 17. In one embodiment, the metal layer for grounding can be disposed on the side of the printed circuit board PCB 17 close to the middle frame 19. In one embodiment, the edge of the printed circuit board PCB 17 can be regarded as the edge of its ground layer. In one embodiment, the metal middle frame 19 can also be used for grounding the above components. The electronic device 10 may also have other floors / ground planes / ground layers. As described above, details are not elaborated here.

[0106] Due to the compactness inside the electronic device, a floor / ground plane / ground layer is usually provided in the internal space within 0-2 mm from the inner surface of the frame (for example, the printed circuit board, the middle frame, the screen metal layer, the battery, etc. can all be regarded as part of the floor). In one embodiment, a dielectric is filled between the frame and the floor. The length and width of the rectangle formed by surrounding the inner surface contour of the filled dielectric can be simply regarded as the length and width of the floor; or the length and width of the rectangle formed by surrounding the contour formed by superimposing all the conductive parts inside the frame can be regarded as the length and width of the floor.

[0107] Among them, the electronic device 10 may further include a battery (not shown in the figure). The battery can be disposed between the middle frame 19 and the rear cover 21, or can be disposed between the middle frame 19 and the display module 15, and the embodiments of the present application do not limit this. In some embodiments, the PCB 17 is divided into a main board and a daughter board, and the battery can be disposed between the main board and the daughter board. Among them, the main board can be disposed between the middle frame 19 and the upper edge of the battery, and the daughter board can be disposed between the middle frame 19 and the lower edge of the battery.

[0108] The electronic device 10 may further include a frame 11, which may be formed of a conductive material such as metal. The frame 11 may be disposed between the display module 15 and the rear cover 21 and extend circumferentially around the periphery of the electronic device 10. The frame 11 may have four sides surrounding the display module 15 to help fix the display module 15. In one implementation, the frame 11 made of a conductive material may be directly used as the conductive frame of the electronic device 10, for example, to form the appearance of a metal frame, which is suitable for metal industrial design (ID). In one implementation, the outer surface of the frame 11 may be a conductive material, such as a metal material, so as to form the appearance of a metal frame. In these implementations, the conductive portion of the frame 11 may be used as the antenna radiator of the electronic device 10.

[0109] In another implementation, the outer surface of the frame 11 may also be a non-conductive material, such as plastic, to form the appearance of a non-metal frame, which is suitable for non-metal ID. In one implementation, the inner surface of the frame 11 may include a conductive material, such as a metal material. In this implementation, the conductive portion of the frame 11 may be used as the antenna radiator of the electronic device 10. It should be understood that the radiator disposed on the inner surface of the frame 11 (or the conductive material on the inner surface) is arranged to fit the non-conductive material of the frame 11 to facilitate antenna radiation, and both the conductive material and the non-conductive material should be regarded as part of the frame 11.

[0110] It should be understood that there may be insulating gaps on the frame 11, and the conductor portion of the frame between two insulating gaps or between an insulating gap and a ground point is used as the radiator, thereby forming a frame antenna. Among them, when the frame 11 is formed of a conductive material such as metal, the insulating gap can be understood as a gap opened in the frame 11 filled with a non-metal material (insulating material). And this gap is visible on the appearance surface. When the outer surface of the frame 11 is a non-conductive material, the insulating gap can be understood as a gap spaced between the conductor portions inside the frame 11, and this gap may be filled with a non-metal material (insulating material), or may not be filled with a non-metal material and be filled with air. And this gap is not visible on the appearance surface.

[0111] The middle frame 19 may include the frame 11. The middle frame 19 including the frame 11, as an integral part, can support the electronic components in the whole machine. The cover plate 13 and the rear cover 21 are respectively covered along the upper and lower edges of the frame to form the housing or casing of the electronic device. In one embodiment, the cover plate 13, the rear cover 21, the frame 11, and / or the middle frame 19 may be collectively referred to as the housing or casing of the electronic device 10. It should be understood that the "housing or casing" may be used to refer to a part or all of any one of the cover plate 13, the rear cover 21, the frame 11, or the middle frame 19, or refer to a part or all of any combination of the cover plate 13, the rear cover 21, the frame 11, or the middle frame 19.

[0112] The frame 11 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. There can be a gap between this part of the frame serving as the radiator and other parts of the middle frame 19, thus ensuring that the antenna radiator has a good radiation environment. In one embodiment, the middle frame 19 can be provided with apertures at this part of the frame serving as the radiator to facilitate the radiation of the antenna.

[0113] Alternatively, the frame 11 may not be regarded as part of the middle frame 19. In one embodiment, the frame 11 can be connected to and integrally formed with the middle frame 19. In another embodiment, the frame 11 can include a protruding part extending inward to connect with the middle frame 19. For example, it can be connected by means of elastic pieces, screws, welding, etc. The protruding part of the frame 11 can also be used to receive the feeding signal, so that at least a part of the frame 11 serves as the radiator of the antenna to receive / transmit radio frequency signals. There can be a gap 42 between this part of the frame serving as the radiator and the middle frame 19, thus ensuring that the antenna radiator has a good radiation environment and enabling the antenna to have a good signal transmission function.

[0114] Among them, the rear cover 21 can be a rear cover made of metal material; it can also be a rear cover made of non-conductive material, such as a glass rear cover, a plastic rear cover and other non-metal rear covers; it can also be a rear cover made of both conductive material and non-conductive material. In one embodiment, the rear cover 21 including conductive material can replace the middle frame 19 and, together with the frame 11, serve as an integral part to support the electronic devices in the whole machine.

[0115] In one embodiment, the middle frame 19, and / or the conductive part of the rear cover 21, can serve as the reference ground of the electronic device 10. Among them, the frame 11, PCB 17, etc. of the electronic device can be grounded through electrical connection with the middle frame.

[0116] The antenna of the electronic device 10 can also be arranged inside the frame 11. When the frame 11 of the electronic device 10 is made of non-conductive material, the antenna radiator can be located inside the electronic device 10 and arranged along the frame 11. For example, the antenna radiator is arranged close to the frame 11 to minimize the volume occupied by the antenna radiator and be closer to the outside of the electronic device 10 to achieve a better signal transmission effect. It should be noted that the antenna radiator being arranged close to the frame 11 means that the antenna radiator can be arranged closely against the frame 11 or close to the frame 11. For example, there can be a certain small gap between the antenna radiator and the frame 11.

[0117] The antenna of the electronic device 10 can also be arranged inside the housing, such as a bracket antenna, a millimeter wave antenna, etc.( Figure 1(not shown in the figure). The clearance for the antenna disposed within the housing can be obtained by a slit / aperture on any one of the middle frame, and / or the side frame, and / or the back cover, and / or the display screen, or by a non-conductive gap / aperture formed between any several of them. The setting of the clearance for the antenna can ensure the radiation characteristics of the antenna. It should be understood that the clearance for the antenna can be a non-conductive area formed by any conductive component within the electronic device 10, and the antenna radiates signals to the external space through this non-conductive area. In one embodiment, the form of the antenna 40 can be an antenna form based on a flexible printed circuit (FPC), an antenna form based on laser-direct-structuring (LDS), or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also adopt a transparent structure embedded inside the screen of the electronic device 10, such that the antenna is a transparent antenna unit embedded inside the screen of the electronic device 10.

[0118] Figure 1 Only some components included in the electronic device 10 are schematically shown, and the actual shapes, actual sizes, and actual structures of these components are not limited by Figure 1 defined.

[0119] It should be understood that in the embodiments of the present application, the surface where the display screen of the electronic device is located can be regarded as the front surface, the surface where the back cover is located can be regarded as the back surface, and the surface where the side frame is located can be regarded as the side surface.

[0120] It should be understood that in the embodiments of the present application, when it is considered that the user holds the electronic device (usually vertically and facing the screen), 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 it is considered that the user holds the electronic device (usually vertically and facing the screen), the orientation of the electronic device has a top, a bottom, a left side, and a right side.

[0121] First, Figure 2 and Figure 3 are used to introduce four antenna modes involved in the present application. Among them, Figure 2 is a schematic diagram of the structure of a common mode of an antenna provided by an embodiment of the present application and the corresponding current and electric field distributions. Figure 3 is a schematic diagram of the structure of another differential mode of an antenna provided by an embodiment of the present application and the corresponding current and electric field distributions. Figure 2 and Figure 3 The two ends of the antenna radiator in are open, and its common mode and differential mode can be respectively called a line common mode and a line differential mode.

[0122] It should be understood that the "common-differential mode" or "CM-DM mode" in this application refers to the line common mode and line differential mode generated on the same radiator.

[0123] 1. Line common mode (CM)

[0124] Figure 2 In (a) of, the two ends of the radiator of antenna 40 are open, and a feeding circuit (not shown in the figure) is connected at the middle position 41. In one embodiment, the feeding form of antenna 40 adopts symmetrical feed. The feeding circuit can be connected to the middle position 41 of antenna 40 through the feeding wire 42. It should be understood that symmetrical feed can be understood as one end of the feeding circuit is connected to the radiator and the other end is grounded. Among them, the connection point (feeding point) of the feeding circuit and the radiator is located at the center of the radiator. The center of the radiator can be, for example, the midpoint of the geometric structure, or the midpoint of the electrical length (or a region within a certain range near the above midpoint).

[0125] The middle position 41 of antenna 40 can be, for example, the geometric center of the antenna, or the midpoint of the electrical length of the radiator. For example, the connection of the feeding wire 42 and antenna 40 covers the middle position 41.

[0126] Figure 2 In (b) of, the current and electric field distributions of antenna 40 are shown. As Figure 2 shown in (b) of, the current shows a reverse distribution on both sides of the middle position 41, for example, a symmetrical distribution; the electric field shows a same-direction distribution on both sides of the middle position 41. As Figure 2 shown in (b) of, the current at the feeding wire 42 shows a same-direction distribution. Based on the same-direction distribution of the current at the feeding wire 42, Figure 2 the feeding shown in (a) of can be called line CM feeding. Based on the reverse distribution of the current on both sides of the connection of the radiator and the feeding wire 42, Figure 2 the antenna mode shown in (b) of can be called line CM mode (also simply referred to as CM mode. For example, for a line antenna, the CM mode refers to the line CM mode). Figure 2 The current and electric field shown in (b) of can be respectively called the current and electric field of the line CM mode.

[0127] The current is stronger at the middle position 41 of antenna 40 (the current maximum point is near the middle position 41 of antenna 40) and weaker at both ends of antenna 40, as Figure 2 shown in (b) of. The electric field is weaker at the middle position 41 of antenna 40 and stronger at both ends of antenna 40.

[0128] 2. Line differential mode (DM)

[0129] As Figure 3 shown in (a) of , the left and right ends of the two radiators of the antenna 50 are open ends, and the feeding circuit is connected at the middle position 51. In one embodiment, the feeding form of the antenna 50 adopts anti-symmetrical feed. One end of the feeding circuit is connected to one of the radiators through the feeding wire 52, and the other end of the feeding circuit is connected to the other radiator through the feeding wire 52. The middle position 51 can be the geometric center of the antenna 50, or the gap formed between the radiators.

[0130] It should be understood that the "central anti-symmetrical feed" mentioned in the present application can be understood as that the positive and negative poles of the feeding circuit are respectively connected to two connection points near the above-mentioned midpoints of the radiators. In one embodiment, the signal amplitudes output by the positive and negative poles of the feeding circuit are the same, and the phases are opposite, for example, the phase difference is 180°±10°.

[0131] Figure 3 shown in (b) of shows the current and electric field distributions of the antenna 50. As Figure 3 shown in (b) of , the current shows a co-directional distribution on both sides of the middle position 51 of the antenna 50, for example, an anti-symmetrical distribution; the electric field shows an anti-directional distribution on both sides of the middle position 51. As Figure 3 shown in (b) of , the current at the feeding wire 52 shows an anti-directional distribution. Based on the anti-directional current distribution at the feeding wire 52, Figure 3 the feeding shown in (a) of can be called line DM feeding. Based on the co-directional current distribution on both sides of the connection between the radiator and the feeding wire 52, Figure 3 the antenna mode shown in (b) of can be called line DM mode (which can also be simply called DM mode. For example, for a wire antenna, the DM mode refers to the line DM mode). Figure 3 The current and electric field shown in (b) of can be respectively called the current and electric field of the line DM mode.

[0132] The current is stronger at the middle position 51 of the antenna 50 (the current maximum point is near the middle position 51 of the antenna 50), and weaker at the two ends of the antenna 50, as Figure 3 shown in (b) of . The electric field is weaker at the middle position 51 of the antenna 50 and stronger at the two ends of the wire antenna 50.

[0133] It should be understood that for the antenna radiator, it can be understood as a metal structural member that generates radiation, and the number thereof can be one piece, as Figure 2 shown, or it can also be two pieces, as Figure 3 shown, and can be adjusted according to actual design or production needs. For example, for the line CM mode, it can also be as Figure 3As shown, two radiators are adopted. The two ends of the two radiators are arranged opposite to each other with a gap therebetween. At the ends close to each other, a symmetric feeding method is adopted. For example, the same feed source signal is fed into the two ends close to each other of the two radiators, and similar effects to those of the Figure 2 antenna structure shown can also be obtained. Correspondingly, for the line DM mode, it can also be like Figure 2 shown, where one radiator is adopted, two feeding points are arranged at the middle position of the radiator, and an anti-symmetric feeding method is adopted. For example, signals with the same amplitude and opposite phases are fed into two symmetric feeding points on the radiator respectively, and similar effects to those of the Figure 3 antenna structure shown can also be obtained.

[0134] 3. Line CM - DM mode

[0135] The above Figure 2 and Figure 3 respectively show the line CM mode and the line DM mode generated by different feeding methods when the two ends of the radiator are open.

[0136] When the feeding form of the antenna adopts asymmetric feeding (the feeding point deviates from the middle position of the radiator, including edge feeding or offset feeding), or the grounding point of the radiator (the coupling part with the floor) is asymmetric (the grounding point deviates from the middle position of the radiator), the antenna can simultaneously generate a first resonance and a second resonance, corresponding to the line CM mode and the line DM mode respectively. For example, the first resonance corresponds to the line CM mode, and the current and electric field distributions are as shown in Figure 2 (b) therein. The second resonance corresponds to the line DM mode, and the current and electric field distributions are as shown in Figure 3 (b) therein.

[0137] The development trend of the ID of electronic devices is large screen ratio and multiple cameras. This has caused a significant reduction in the antenna clearance, and the layout space is becoming more and more limited. At the current state, the communication frequency bands of electronic devices will still coexist with 3G, 4G, and 5G frequency bands for a long time, and the number of antennas required is increasing. Since the size of the radiator of the antenna is large in the low - frequency band, but it is very difficult to reserve enough space for the low - frequency antenna in the increasingly tense layout space. When the size of the radiator is limited, how to improve the efficiency of the antenna has become an urgent task.

[0138] The embodiment of the present application provides an electronic device, including an antenna. The antenna uses the conductor part of the frame as the radiator, and uses a coupling connection part to couple the current path on the adjacent conductor extended radiator, thereby improving the efficiency of the antenna.

[0139] Figure 4 is a schematic diagram of an electronic device 10 provided by the embodiment of the present application.

[0140] As Figure 4As shown, the electronic device 10 may include a floor frame 11, an antenna 200, and a floor 300.

[0141] Among them, the frame 11 includes a first position 201, a second position 202, and a third position 203 arranged in sequence. The frame 11 has a first insulating gap and a second insulating gap at the first position 201 and the second position 202 respectively. The frame 11 is coupled to the floor 300 at the third position 203.

[0142] In one embodiment, the width of the first insulating gap is greater than or equal to 0.2 mm and less than or equal to 1.5 mm. It should be understood that in the embodiments of the present application, the widths of the gaps opened on the frame can all be within the above range. For the sake of brevity of discussion, they will not be elaborated one by one.

[0143] The frame 11 includes a first side 131 and a second side 132 that intersect at an angle. The first position 201 is located on the first side 131, and the second position 202 and the third position 203 are located on the second side 132.

[0144] The antenna 200 includes a first radiator 210 and a second radiator 220. The first radiator 210 includes a conductor portion of the frame 11 between the first position 201 and the second position 202. The second radiator 220 includes a conductor portion of the frame 11 between the second position 202 and the third position. The first radiator 210 is spaced apart from the floor 300. The second radiator 220 is spaced apart from the floor 300.

[0145] The length D2 of the second radiator 220 is less than or equal to one-third of the length D1 of the first radiator 210 and greater than or equal to one-sixteenth of the length D1 of the first radiator 210, that is, (1 / 16)×D1 ≤ D2 ≤ (1 / 3)×D1. In one embodiment, the length D2 of the second radiator 220 is less than or equal to one-sixth of the length D1 of the first radiator 210. In one embodiment, the length D2 of the second radiator 220 is less than or equal to one-tenth of the length D1 of the first radiator 210.

[0146] The first end of the first radiator 210 and the first end of the second radiator 220 are opposite and non-contact through the second insulating gap (at the second insulating gap). The first end of the first radiator 210 and the first end of the second radiator 220 are the ends at the second position 202.

[0147] The antenna 200 further includes a coupling connector 230 and a feeding circuit 250.

[0148] Among them, the first end of the coupling connector 230 extends towards the first radiator 210 and is arranged at an interval from the first radiator 210. The second end of the coupling connector 230 is connected to the first end of the second radiator 220. In one embodiment, the distance between the center of the connection area of the second end of the coupling connector 230 and the end of the first end of the second radiator 220 is less than or equal to 5 mm.

[0149] In one embodiment, the coupling connector 230 is located between the floor 300 and the frame 11.

[0150] The first radiator 210 includes a feeding point 251. The feeding circuit 250 is coupled to the feeding point 251. The feeding circuit 250 is used to feed a radio frequency signal of the first frequency band into the first radiator 210. The first radiator 210 is used to generate a first resonance corresponding to the first frequency band (the resonance frequency band of the first resonance includes the first frequency band).

[0151] It should be understood that the embodiments of the present application do not limit the position of the feeding point 251. For the sake of simplicity of discussion, in the embodiments of the present application, only the case where the feeding point 251 is located between the grounding point 241 and the first position 201 is taken as an example, and adjustments can be made in actual production or design.

[0152] It should be understood that for the technical solution provided by the embodiments of the present application, when the first radiator 210 generates resonance, part of the current extends to the second radiator 220, increasing the current path. Due to the setting of the coupling connector 230, the coupling amount between the second radiator 220 and the first radiator 210 can be further increased, more current can be coupled and generated on the second radiator 220, the current path is further increased, the radiation aperture of the antenna 200 can be increased, and thus the antenna 200 has better radiation characteristics (for example, improving the radiation efficiency of the antenna 200). The second radiator 220 and / or the coupling connector 230 do not generate resonance within the first frequency band, and only improve the radiation characteristics (for example, radiation efficiency) of the antenna 200 by extending the current path.

[0153] Among them, the fact that the second radiator 220 and / or the coupling connector 230 do not resonate within the first frequency band can be understood as that the second radiator 220 and the coupling connector 230 can generate additional resonances (for example, called parasitic resonances), and this additional resonance is not located within the first frequency band, and the resonance point of this additional resonance is far from the resonance point of the above-mentioned first resonance, so that it does not affect the antenna performance of the first resonance within the first frequency band. In the embodiments of the present application, no radio frequency signal corresponding to the frequency band where the additional resonance is located is fed into the first radiator 210. Therefore, the additional resonance generated by the second radiator 220 and / or the coupling connector 230 is not used to support the operation of the antenna 200, nor is it used to support the communication frequency band of the electronic device. In some embodiments, the fact that the second radiator 220 and / or the coupling connector 230 do not resonate within the first frequency band can also be understood as that they do not generate any obvious resonance. For example, a resonance dip less than -6 dB can be regarded as an obvious resonance.

[0154] Moreover, since the second end of the second radiator 220 is a grounded end, the current coupled to the second radiator 220 can further excite the longitudinal mode of the floor 300, thereby improving the radiation characteristics of the antenna 200 (for example, improving the radiation efficiency of the antenna 200).

[0155] At the same time, since a part of the first radiator 210 is located on the first side 131 and a part is located on the second side 132, when the first radiator 210 generates resonance, it can excite the transverse mode and the longitudinal mode generated by the floor 300, thereby improving the radiation characteristics of the antenna 200 (for example, bandwidth).

[0156] In one embodiment, the electronic device 10 further includes an antenna 310, and the antenna 310 includes a third radiator 311 and a feeding circuit 312.

[0157] The frame 11 further includes a fourth position 204, and the frame has a third insulating gap at the fourth position 204. The first position 201 is located between the second position 202 and the fourth position 204. The third radiator 311 includes a conductor portion of the frame 11 between the first position 201 and the fourth position 204. The first end (the end at the first position 201) of the third radiator 311 is a grounded end, and the second end (the end at the fourth position 204) is an open end. The feeding circuit 312 is coupled to the third radiator 311.

[0158] In one embodiment, the electronic device 10 further includes an antenna 320, and the antenna 320 includes a fourth radiator 321 and a feeding circuit 322.

[0159] The frame 11 further includes a fifth position 205 where the frame has a fourth insulating gap. The third position 203 is located between the second position 202 and the fifth position 205. The fourth radiator 321 includes a conductor portion of the frame 11 between the third position 203 and the fifth position 205. The first end of the fourth radiator 321 (the end at the third position 203) is a ground end, and the second end (the end at the fifth position 205) is an open end. The feeding circuit 322 is coupled to the fourth radiator 321.

[0160] In one embodiment, the first frequency band is a communication frequency band within the range of the low frequency band (LB) (698 MHz - 960 MHz) in the cellular network. In the low frequency band, multiple communication frequency bands belonging to this frequency range can be included. For example, B5, B8, etc. can be correspondingly understood in the embodiments of this application and will not be elaborated one by one.

[0161] In one embodiment, the first radiator 210 is used to generate a first resonance. In one embodiment, the length of the first radiator 210 is less than one - half of the second wavelength, and the first wavelength is the wavelength corresponding to the first resonance. In one embodiment, the sum of the lengths of the first radiator 210 and the second radiator 220 (the length of the conductor portion between the first position 201 and the third position 203) is less than one - half of the first wavelength.

[0162] It should be understood that the first wavelength can be understood as the vacuum wavelength corresponding to the resonance point of the first resonance, or the vacuum wavelength corresponding to the center frequency of the resonance frequency band of the first resonance. The wavelengths in the embodiments of this application can be correspondingly understood and will not be elaborated one by one. Since there is a certain correspondence between the medium wavelength and the vacuum wavelength, the medium wavelength can be converted from the vacuum wavelength.

[0163] For the low frequency band, the corresponding radiator size is relatively large. In the current development trend of the ID of electronic devices, it is difficult to reserve enough space for the low - frequency antenna. As Figure 4 shown, the antenna 310 and the antenna 320 are respectively arranged on both sides of the antenna 200, and the space inside the electronic device 10 is more limited. When the length of the radiator is limited, the radiation characteristics (such as radiation efficiency) of the antenna 200 cannot be improved by extending the size of the first radiator 210.

[0164] However, in the technical solution provided by the embodiments of this application, without increasing the length of the radiator (the overall length is less than one - half of the wavelength), the coupling amount between the second radiator 220 and the first radiator 210 can be increased by using the coupling connector 230, so that the two radiators have strong coupling characteristics, thereby extending the current path and improving the radiation characteristics (such as radiation efficiency) of the antenna 200.

[0165] In one embodiment, the antenna 200 further includes a grounding connection 240, as Figure 5 shown. The first radiator 210 includes a grounding point 241. The first end of the grounding connection 240 is coupled to the grounding point 241. The second end of the grounding connection 240 is coupled to the floor 300. The grounding connection 240 is inductive.

[0166] It should be understood that the first radiator 210 is coupled to the floor 300 through the inductive grounding connection 240, and can simultaneously generate the line CM mode and the line DM mode in the above embodiments, and use the two modes to generate resonance respectively, so as to expand the bandwidth of the antenna 200.

[0167] When the coupling connection 230 is not provided, the electric fields generated by the line CM mode and the line DM mode both have strong components at the first insulating gap (the first position 201), and the mutual coupling between the electric fields generated by the two modes is strong, resulting in poor compatibility between the line CM mode and the line DM mode. Since the coupling connection 230 is provided, the electric field generated by the line DM mode can be dispersed, so that it also has a strong component at the second insulating gap (the second position 202), thereby weakening the intensity of the electric field generated by the line DM mode at the first insulating gap (the first position 201), and improving the compatibility between the line CM mode and the line DM mode, so that the antenna 200 has better radiation characteristics (for example, radiation efficiency).

[0168] The ratio of the length L1 of the first radiator 210 on the first side 131 to the length L2 of the first radiator 210 on the second side 132 is greater than or equal to 0.3 and less than or equal to 3.

[0169] It should be understood that in the antenna 200 Figure 5 shown, the connection area between the first side 131 and the second side 132 is in a polygonal shape. In one embodiment, the connection area between the first side 131 and the second side 132 is in an arc shape. Therefore, in the case of the above different connection areas, the length L1 of the first radiator 210 on the first side 131 can be understood as the length extended in the extension direction of the first side 131 (for example, the x direction), and the length of the second part can be understood as the length extended in the extension direction of the second side 132 (for example, the y direction).

[0170] Since part of the first radiator 210 is located on the first side 131 and part is located on the second side 132, when the first radiator 210 generates resonance, it can better excite the transverse mode and the longitudinal mode generated by the floor 300, thereby improving the radiation characteristics (for example, bandwidth) of the antenna 200.

[0171] In one embodiment, the first radiator 210 is used to generate a first resonance and a second resonance, and the first resonance and the second resonance are used to jointly support the low-frequency band.

[0172] In one embodiment, the resonance point frequency of the first resonance is lower than that of the second resonance. In one embodiment, the length of the first radiator 210 is less than half of the second wavelength, where the second wavelength is the wavelength corresponding to the second resonance. In one embodiment, the sum of the lengths of the first radiator 210 and the second radiator 220 (the length of the conductor portion between the first position 201 and the third position 203) is less than half of the second wavelength.

[0173] It should be understood that without increasing the length of the radiator (the overall length is less than half of the wavelength), the coupling amount between the second radiator 220 and the first radiator 210 can be increased by using the coupling connector 230, so that the two radiators have the characteristic of strong coupling, thereby extending the current path and improving the radiation characteristics (e.g., radiation efficiency) of the antenna 200.

[0174] In one embodiment, the length of the first radiator 210 (the length of the conductor portion between the first position 201 and the second position 202) is less than or equal to 100 mm. In one embodiment, the length of the first radiator 210 (the length of the conductor portion between the first position 201 and the second position 202) is less than or equal to 90 mm. In one embodiment, the length of the first radiator 210 (the length of the conductor portion between the first position 201 and the second position 202) is greater than or equal to 75 mm.

[0175] In one embodiment, the length of the second radiator 220 (the length of the conductor portion between the second position 202 and the third position 203) is less than or equal to 20 mm. In one embodiment, the length of the second radiator 220 (the length of the conductor portion between the second position 202 and the third position 203) is less than or equal to 15 mm. In one embodiment, the length of the second radiator 220 (the length of the conductor portion between the second position 202 and the third position 203) is greater than or equal to 10 mm. Herein, the frame 11 is coupled to the floor 300 at the third position 203, and it can be understood that the third position 203 is the grounding point closest to the second position 202, such as the connection edge between the frame and the middle plate.

[0176] It should be understood that in a smaller space, the coupling amount between the second radiator 220 and the first radiator 210 can be increased by using the coupling connector 230, so that the two radiators have the characteristic of strong coupling, thereby extending the current path and improving the radiation characteristics (e.g., radiation efficiency) of the antenna 200.

[0177] In one embodiment, the first resonance may be generated by the line CM mode, and the second resonance may be generated by the line DM mode. At the resonance point of the first resonance, the currents on the first radiator 210 on both sides of the grounding point 241 are reversed. At the resonance point of the second resonance, the currents on the first radiator 210 on both sides of the grounding point 241 are in the same direction.

[0178] In one embodiment, the first resonance and the second resonance may be close to each other so that the first resonance and the second resonance are used to jointly support an operating frequency band of the electronic device 10. In one embodiment, in the low-frequency band, the frequency difference between the resonance point frequency of the first resonance and the resonance point frequency of the second resonance is greater than or equal to 80 MHz and less than or equal to 160 MHz.

[0179] In one embodiment, the grounding connection 240 can be realized by a metal shrapnel or a connecting rib structure between the middle plate of the middle frame. When using metal components such as metal shrapnels, the first end of the metal shrapnel is elastically connected to the grounding point 241, and an inductor is electrically connected between the second end and the floor 300, so that the grounding connection 240 is inductive. When using a connecting rib structure between the middle plate of the middle frame, the connecting rib structure can be similar to a transmission line and is equivalent to a distributed inductor, so that the grounding connection 240 is inductive.

[0180] In one embodiment, the equivalent inductance value of the grounding connection 240 is less than or equal to 6.2 nH. In one embodiment, the equivalent inductance value of the grounding connection 240 is greater than or equal to 2 nH and less than or equal to 4 nH.

[0181] It should be understood that when the equivalent inductance value of the grounding connection 240 is within the above range, the current transmitted on the grounding connection 240 during the resonance of the first radiator 210 can be adjusted, thereby adjusting the radiation characteristics of the antenna (for example, the frequency of the resonance point).

[0182] In one embodiment, the grounding point 241 may not be located in the central region of the first radiator 210, so that the line CM mode and the line DM mode can be generated simultaneously.

[0183] It should be understood that the central region can be understood as the region within 5 mm from the center. The physical length between the center and the first position 201 is the same as the physical length between the center and the second position 202, or the electrical length between the center and the first position 201 is the same as the electrical length between the center and the second position 202. For the sake of simplicity of discussion, the central region described in the embodiments of the present application can be understood accordingly.

[0184] In one embodiment, the electronic device includes a middle frame 19, and the middle frame includes the above-mentioned frame 11 and middle plate 301, as Figure 6As shown. In one embodiment, the middle plate 301 is electrically connected to the floor 300 at multiple locations. In one embodiment, the middle plate 301 can be regarded as at least a part of the floor 300. In one embodiment, the frame 11 is electrically connected to the middle plate 301 through a connecting rib structure (such as a grounding connector). The connecting rib structure (such as a grounding connector) is connected between the frame 11 and the middle plate 301 and is integrally formed with the frame 11 and the middle plate 301. For the sake of simplicity of discussion, the grounding connectors described in the embodiments of the present application can be understood accordingly.

[0185] In one embodiment, the coupling connector 230 and the frame 11 are integrally formed. In one embodiment, the coupling connector 230, the grounding connector 240 and the frame 11 are integrally formed. In one embodiment, the coupling connector 230, the grounding connector 240, the frame 11 and the middle plate are integrally formed.

[0186] It should be understood that the coupling connector 230, the grounding connector 240, the frame 11 and the middle plate can be milled from the same metal part, so as to reduce the error during assembly and thus improve the radiation characteristics (such as bandwidth) of the antenna 200.

[0187] In one embodiment, the electronic device may further include a battery 302. The middle frame 19 further includes a battery compartment 303, and the battery compartment 303 is located on the middle plate 301. The battery 302 is located on the middle plate 301 and within the space enclosed by the battery compartment 303. The coupling connector 230 and the grounding connector 240 are located between the battery 302 and the frame 11.

[0188] In one embodiment, an equivalent capacitance is formed between the coupling connector 230 and the first radiator 210. The capacitance value of the equivalent capacitance formed between the coupling connector 230 and the first radiator 210 is greater than or equal to 0.4 pF and less than or equal to 2.4 pF.

[0189] It should be understood that by adjusting the capacitance value of the equivalent capacitance formed between the coupling connector 230 and the first radiator 210, the coupling amount between the second radiator 220 and the first radiator 210 can be controlled, so that when the first radiator 210 generates resonance, the current on the second radiator 220 can be changed, making the antenna 200 have different radiation characteristics (such as resonance point frequency, radiation efficiency, etc.).

[0190] At the same time, the calculation formula of the capacitance value of the equivalent capacitance is as follows:

[0191]

[0192] Among them, ε is the dielectric constant of the medium between the two plates of the capacitor (coupling connector 230 and the first radiator 210); δ is the absolute dielectric constant in a vacuum; k is the electrostatic constant; S is the facing area of the two plates (the area where the coupling connector 230 faces the first radiator 210); d is the perpendicular distance between the two plates (the distance between the coupling connector 230 and the first radiator 210).

[0193] By adjusting the above electrical parameters (the dielectric constant of the medium between the coupling connector 230 and the first radiator 210, the facing area, or the distance), the capacitance value of the equivalent capacitor formed between the coupling connector 230 and the first radiator 210 can be adjusted, so that the antenna 200 has different radiation characteristics (for example, resonance point frequency, radiation efficiency, etc.).

[0194] In one embodiment, the distance D between the first radiator 210 and the coupling connector 230 in the first direction is less than or equal to 2 mm, and the first direction (for example, the x direction) is perpendicular to the extension direction of the second side.

[0195] It should be understood that the distance between the first radiator 210 and the coupling connector 230 can be understood as the minimum value of the distance between a point on the first radiator 210 and a point on the coupling connector 230. The distance D between the first radiator 210 and the coupling connector 230 can be used to adjust the capacitance value of the equivalent capacitor formed between the coupling connector 230 and the first radiator 210, and control the coupling amount between the second radiator 220 and the first radiator 210, so that the antenna 200 has different radiation characteristics (for example, resonance point frequency, radiation efficiency, etc.).

[0196] In one embodiment, the dimension of the coupling connector 230 in the second direction is greater than or equal to 3 mm and less than or equal to 12 mm, and the second direction is the extension direction of the second side (for example, the y direction).

[0197] In one embodiment, the dimension of the coupling connector 230 in the first direction is less than or equal to 2 mm.

[0198] In one embodiment, the dimension of the coupling connector 230 in the third direction is greater than or equal to 0.5 mm and less than or equal to 2 mm, and the third direction is the thickness direction of the electronic device 10 (for example, the z direction).

[0199] It should be understood that when the dimensions of the coupling connector 230 are within the above ranges, there is a good coupling amount between the second radiator 220 and the first radiator 210, so that the antenna 200 has good radiation characteristics (for example, radiation efficiency, etc.).

[0200] In one embodiment, the coupling connector 230 does not overlap with the floor 300 in the third direction (e.g., the z direction). In one embodiment, the coupling connector 230 may be disposed in a gap formed between the floor 300 (e.g., the battery compartment, the middle frame) and the frame 11.

[0201] In one embodiment, the antenna 200 may further include a tuning circuit. The first end of the tuning circuit may be coupled to the connection point of the first radiator 210, and the second end is coupled to the floor 300.

[0202] It should be understood that the tuning circuit can be used to switch the electronic components coupled to the connection point (switch the equivalent capacitance value or equivalent inductance value between the floor and the connection point), so as to switch the resonant point frequency of the resonance generated by the antenna 200. In one embodiment, the connection point may be close to the first insulating gap (the first position 201) (the length of the first radiator 210 between the connection point and the first position 201 is less than or equal to 10 mm). Since the open end (at the first position 201) of the first radiator 210 has a strong electric field, the tuning circuit can have a larger adjustment range of the resonant frequency at this position. In one embodiment, the antenna 200 may include two tuning circuits, which may be respectively disposed near the first insulating gap and the second insulating gap, so that the resonant frequency of the resonance generated by the antenna 200 has a larger adjustment range.

[0203] Figure 8 FIG. 10 is a schematic diagram of an electronic device 10 provided by an embodiment of the present application. The electronic device 10 may be a foldable electronic device.

[0204] As Figure 8 shown, the foldable electronic device 10 may include a first housing 401, a second housing 402, and a rotating shaft 403.

[0205] Wherein, the first housing 401 includes a first frame 410, and at least a part of the first frame 410 is spaced apart from the floor 300. The second housing 402 includes a second frame 420, and at least a part of the second frame 420 is spaced apart from the floor 300.

[0206] The rotating shaft 403 is located between the first housing 401 and the second housing 402, and the rotating shaft 403 is respectively rotatably connected to the first housing 401 and the second housing 402, so that the first housing 401 and the second housing 402 can rotate relative to each other.

[0207] It should be understood that in Figure 8In the foldable electronic device 10 shown, the rotating shaft 403 is directly connected to the first housing 401 and the second housing 402 respectively, enabling the first housing 401 and the second housing 402 to rotate relative to each other. In addition, "the rotating shaft 403 is rotationally connected to the first housing 401 and the second housing 402 respectively" includes the following situation: the rotating shaft 403 can be rotationally connected to the first or second housing through one or more second rotating shafts and one or more intermediate housings. For example, in one embodiment, the electronic device 10 may further include a first rotating shaft and a second rotating shaft, as well as one or more intermediate housings located between the first rotating shaft and the second rotating shaft. The first rotating shaft is located between the first housing 401 and the intermediate housing, and the first rotating shaft is rotationally connected to the first housing 401 and the intermediate housing respectively, enabling the first housing 401 and the intermediate housing to rotate relative to each other. The second rotating shaft is located between the intermediate housing and the second housing 402, and the rotating shaft 403 is rotationally connected to the intermediate housing and the second housing 402 respectively, enabling the intermediate housing and the second housing 402 to rotate relative to each other.

[0208] The electronic device 10 may further include an antenna 200. Figure 8 The antenna 200 shown in [] is the same as the antenna 200 in the above embodiment, except that Figure 8 the electronic device 10 in [] is a foldable electronic device, Figure 8 the first frame 410 in [] is equivalent to the frame 11 in the above embodiment.

[0209] In one embodiment, the distance between the third position 203 and the rotating shaft 403 is less than or equal to 20 mm.

[0210] It should be understood that in a foldable electronic device, for example, in a "small fold" electronic device (in the unfolded state, the length of the electronic device is greater than or equal to 1.5 times the width), the layout space is more compact, and the technical solution provided by the embodiments of the present application can be arranged adjacent to the rotating shaft 403 and still has good radiation characteristics.

[0211] In one embodiment, in the unfolded state, the "small fold" electronic device has a length greater than or equal to 150 mm and less than or equal to 200 mm. In the unfolded state, the "small fold" electronic device has a width greater than or equal to 50 mm and less than or equal to 100 mm. In one embodiment, in the folded state, the "small fold" electronic device has a length greater than or equal to 50 mm and less than or equal to 110 mm.

[0212] For the sake of simplicity of discussion, Figure 8 the antenna 200 shown in [] and Figure 5Similar parts of the antenna 200 shown are not described one by one. For example, the position, length ratio of the first radiator 210, and the positional relationship with the coupling connection member 230; the physical length of the coupling connection member 230 and the capacitance value of the equivalent capacitance formed with the first radiator 210; the first radiator 210 and the second radiator 220 are used to generate the first resonance and the second resonance; the equivalent inductance value of the ground connection member 240, etc.

[0213] Figure 9 and Figure 10 is Figure 5 the simulation result of the antenna 200 in the electronic device 10 shown. Among them, Figure 9 is the S-parameter simulation result of the antenna 200. Figure 10 is the simulation result of the radiation efficiency and system efficiency of the antenna 200.

[0214] It should be understood that in Figure 9 and Figure 10 the simulation results of the antenna without the coupling connection member shown, the difference between it and the antenna 200 in the electronic device 10 shown in Figure 5 is only that the coupling connection member is not provided.

[0215] As Figure 9 shown, the antenna can generate resonances near 0.7 GHz and near 0.8 GHz, which can correspond to the first resonance and the second resonance in the above embodiments.

[0216] Compared with the antenna without the coupling connection member, after the antenna is provided with the coupling connection member, the antenna has better resonance characteristics (the curve pit in the S-parameters is deeper).

[0217] As Figure 10 shown, in the low-frequency band (698 MHz - 960 MHz) of the cellular network, compared with the antenna without the coupling connection member, after the antenna is provided with the coupling connection member, the antenna has better radiation efficiency and system efficiency.

[0218] Figure 11 and Figure 12 is Figure 5 the schematic diagram of the current distribution of the antenna 200 in the electronic device 10 shown. Among them, Figure 11 is the schematic diagram of the current distribution of the antenna 200 in the online CM mode. Figure 12 is the schematic diagram of the current distribution of the antenna 200 in the online DM mode.

[0219] As Figure 11 shown, when the antenna 200 is in the online CM mode, the currents on the first radiator on both sides of the grounding point 241 are in opposite directions.

[0220] As Figure 12As shown, when the antenna 200 is in the online DM mode, the currents on the first radiator on both sides of the grounding point 241 are reversed.

[0221] In the online CM mode, the antenna has a strong electric field at the first insulating gap (the first position 201). In the online DM mode, the antenna has a strong electric field at both the first insulating gap (the first position 201) and the second insulating gap (the second position 202). Since the electric field generated in the online DM mode is no longer concentrated at the first insulating gap (the first position 201), the compatibility between the online CM mode and the online DM mode can be improved, so that the antenna 200 has better radiation characteristics (for example, radiation efficiency).

[0222] As described above, the above is only the specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that, comprising: a floor; a frame, the frame includes a first position, a second position and a third position arranged in sequence, the frame has a first insulating gap and a second insulating gap at the first position and the second position respectively, and the frame is coupled to the floor at the third position, the frame includes a first side and a second side intersecting at an angle, the first position is located on the first side, and the second position and the third position are located on the second side; an antenna, the antenna includes: a first radiator and a second radiator, the first radiator includes a conductive portion of the frame between the first position and the second position, the second radiator includes a conductive portion of the frame between the second position and the third position, the length D1 of the first radiator and the length D2 of the second radiator satisfy (1 / 16)×D1 ≤ D2 ≤ (1 / 3)×D1, and both the first radiator and the second radiator are spaced from the floor; a coupling connector, a first end of the coupling connector extends towards the first radiator and is spaced from the first radiator, a second end of the coupling connector is connected to a first end of the second radiator, and a first end of the first radiator and a first end of the second radiator are opposite and non - contacting through the second insulating gap; a feeding circuit, the first radiator includes a feeding point, the feeding circuit is coupled to the feeding point, the feeding circuit is used to feed a radio frequency signal of a first frequency band into the first radiator, and the first radiator is used to generate a first resonance corresponding to the first frequency band.

2. The electronic device according to claim 1, characterized in that, the second radiator and the coupling connector are used to extend the current on the first radiator, and improve the radiation efficiency of the antenna in the first frequency band.

3. The electronic device according to claim 1 or 2, characterized in that, the coupling connector is located between the floor and the frame.

4. The electronic device according to any one of claims 1 to 3, characterized in that, the electronic device further includes a middle plate and a battery, the battery is located on the middle plate, and the middle plate serves as at least a part of the floor; wherein, the coupling connector is located between the battery and the frame.

5. The electronic device according to any one of claims 1 to 4, characterized in that, the coupling connector and the frame are integrally formed.

6. The electronic device according to any one of claims 1 to 5, characterized in that, the electronic device includes a first housing, a second housing and a rotating shaft, the rotating shaft is located between the first housing and the second housing, and the rotating shaft is respectively rotatably connected to the first housing and the second housing; the first housing includes the frame; the distance between the third position and the rotating shaft is less than or equal to 20 mm.

7. The electronic device according to claim 6, characterized in that, based on the electronic device being in an unfolded state, the length of the electronic device is greater than or equal to three - halves of the width of the electronic device.

8. The electronic device according to any one of claims 1 to 7, characterized in that, the first frequency band is a communication frequency band in the range of 698 MHz - 960 MHz.

9. The electronic device according to any one of claims 1 to 8, characterized in that, the distance D between the first radiator and the coupling connection member in the first direction is less than or equal to 2 mm, and the first direction is perpendicular to the extending direction of the second side.

10. The electronic device according to any one of claims 1 to 9, characterized in that, the dimension of the coupling connection member in the second direction is greater than or equal to 3 mm and less than or equal to 12 mm, and the second direction is the extending direction of the second side.

11. The electronic device according to any one of claims 1 to 10, characterized in that, the dimension of the coupling connection member in the first direction is less than or equal to 2 mm, and the first direction is perpendicular to the extending direction of the second side.

12. The electronic device according to any one of claims 1 to 11, characterized in that, the dimension of the coupling connection member in the third direction is greater than or equal to 0.5 mm and less than or equal to 2 mm, and the third direction is the thickness direction of the electronic device.

13. The electronic device according to any one of claims 1 to 12, characterized in that, the coupling connection member and the floor do not overlap in the third direction, and the third direction is the thickness direction of the electronic device.

14. The electronic device according to any one of claims 1 to 13, characterized in that, the capacitance value of the equivalent capacitance formed between the coupling connection member and the first radiator is greater than or equal to 0.4 pF and less than or equal to 2.4 pF.

15. The electronic device according to any one of claims 1 to 14, characterized in that, the antenna further includes a grounding connection member, the first radiator includes a grounding point, the first end of the grounding connection member is coupled to the grounding point, the second end of the grounding connection member is coupled to the floor, and the grounding connection member is inductive.

16. The electronic device according to claim 15, characterized in that, the first radiator is used to generate a first resonance and a second resonance, and the first resonance and the second resonance are used to jointly support the first frequency band.

17. The electronic device according to any one of claims 16, characterized in that, the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance, and the length of the conductive part between the first position and the third position is less than one half of the first wavelength, and the first wavelength is the wavelength corresponding to the second resonance.

18. The electronic device according to any one of claims 15 to 17, characterized in that, the equivalent inductance value of the grounding connection member is less than or equal to 6.2 nH.

19. The electronic device according to any one of claims 15 to 18, characterized in that, the coupling connection member, the grounding connection member and the frame are integrally formed.

20. The electronic device according to any one of claims 1 to 19, characterized in that, The length of the conductive part between the first position and the second position is less than 100 mm.

21. The electronic device according to any one of claims 1 to 20, wherein, the ratio of the length of the first radiator on the first side to the length of the first radiator on the second side is greater than or equal to 0.3 and less than or equal to 3.

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