Electronic equipment

Abstract

The invention provides electronic equipment. The electronic equipment comprises an antenna. According to the antenna, a conductive part of a frame of the electronic equipment and a conductor arranged on the inner side of the frame are used as radiators. And one end of the internally arranged radiator is connected with the conductive part of the frame which is externally used as the radiator. The internally arranged radiator can extend a current path through the frame, so that the antenna has good radiation efficiency and system efficiency in a resonance frequency band, and the electronic equipment has good communication performance.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular, 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. Among them, the antennas in the low-frequency band are more severely restricted. For example, compared with the high-frequency band, in the low-frequency band, with the same clearance, the corresponding electrical length is smaller, and the antenna is more affected by the electronic components arranged inside the electronic device.

[0003] In the current state, 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] Expanding the efficiency bandwidth of antennas by traditional means such as increasing the size of the radiator of the antenna has reached a bottleneck. For example, it is very difficult to increase the length or clearance of the radiator to improve the efficiency bandwidth of the antenna under the current architecture of electronic devices. Therefore, it has become an urgent task to improve the efficiency bandwidth of the antenna while keeping the size of the radiator unchanged. Summary of the Invention

[0005] This application provides an electronic device, including an antenna. The antenna uses the conductive part of the frame of the electronic device and the metal parts arranged inside as radiators. The radiators arranged inside can extend the current path through the frame, so that the antenna has good radiation efficiency and system efficiency in the resonant frequency band.

[0006] In a first aspect, an electronic device is provided, comprising: a floor; a frame, at least part of the frame being spaced apart from the floor, the first frame including a first position, a second position, and a third position arranged in sequence, the frame being coupled to the floor at the first position, the frame having a first insulating gap formed at the second position, a first end of the first radiator and a first end of the second radiator being opposite to each other and non-touching through the first insulating gap, the frame being coupled to the floor at the third position or having a second insulating gap formed at the third position; an antenna, the antenna including: a first radiator, 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 frame between the second position and the third position; a third radiator, a first end of the third radiator extending towards the first radiator, a second end of the third radiator being connected to a connection point of the second radiator, the first end of the third radiator being an open end, the first radiator and the third radiator being spaced apart and at least partially overlapping in a first direction, the first direction being a direction perpendicular to the extending direction of the first radiator, the third radiator being disposed inside the frame; a first feeding circuit, the second radiator or the third radiator including a feeding point, the first feeding circuit being coupled to the feeding point; wherein, a physical length L1 of the first radiator, a physical length L2 of the third radiator, and a physical length L4 of the second radiator between the connection point and the grounding end of the second radiator satisfy: L1×50%≤L2 + L4≤L1, the first radiator, the second radiator, and the third radiator are configured to generate a first resonance and a second resonance, the first resonance and the second resonance are configured to jointly support a first communication frequency band of the electronic device; the second radiator is further configured to generate a third resonance, a resonance frequency band of the third resonance includes a second communication frequency band, and the first communication frequency band is different from the second communication frequency band.

[0007] According to an embodiment of the present application, when an electrical signal is fed into the first feeding point, the first radiator, the second radiator, and the third radiator can generate the above-mentioned first resonance and second resonance, so that the antenna has a relatively wide operating bandwidth.

[0008] Moreover, while generating the third resonance, the second radiator is configured to increase a radiation aperture of the third radiator. Since the second end of the third radiator is connected to the connection point of the second radiator, when the third radiator generates resonance, the current on the third radiator can be transmitted from the connection point to the grounding end on the second radiator, extending the current path on the third radiator, thereby increasing the radiation aperture of the third radiator and improving the radiation characteristics (such as radiation efficiency) of the antenna in the resonance frequency bands of the first resonance and the second resonance.

[0009] In combination with the first aspect, in some implementations of the first aspect, the frame is coupled to the floor at the third position, the first end of the second radiator is an open end, and the second end of the second radiator is a grounded end.

[0010] In combination with the first aspect, in some implementations of the first aspect, the second insulating gap is formed in the frame at the third position, the first end of the second radiator is a grounded end, and the second end of the second radiator is an open end.

[0011] According to the embodiments of the present application, the positions of the open end and the grounded end of the second radiator can be determined according to actual production or design.

[0012] In combination with the first aspect, in some implementations of the first aspect, the length of the second radiator is less than the length of the first radiator, and the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is less than or equal to two-thirds of the resonance point frequency of the third resonance.

[0013] In combination with the first aspect, in some implementations of the first aspect, the length of the first radiator is greater than or equal to three-halves of the length of the second radiator.

[0014] In combination with the first aspect, in some implementations of the first aspect, the length of the second radiator is greater than the length of the first radiator, and the resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is greater than or equal to two-thirds of the resonance point frequency of the third resonance.

[0015] In combination with the first aspect, in some implementations of the first aspect, the length of the first radiator and / or the third radiator is less than or equal to two-thirds of the length of the second radiator.

[0016] According to the embodiments of the present application, the greater the frequency difference between the resonance point frequency of the third resonance and the resonance point frequency of the first resonance / the second resonance, the smaller the influence of the current of the third radiator on the second radiator on the third resonance can be.

[0017] In combination with the first aspect, in some implementations of the first aspect, the length of the second radiator between the connection point and the grounded end of the second radiator is greater than zero and less than or equal to one-third of the length of the second radiator.

[0018] In combination with the first aspect, in some implementations of the first aspect, the second communication frequency band includes at least some frequency bands in the cellular network.

[0019] According to the embodiments of the present application, when the second radiator generates resonance, the region (the distance from the ground end is less than or equal to one-third of the length L3 of the second radiator) has a strong current. The connection point is within the above region. When the third radiator generates resonance, the current transmitted from the third radiator to the second radiator will not have a great impact on the third resonance (for example, the offset of the resonance point frequency of the third resonance is less than 50 MHz), and the third resonance can have a relatively wide resonance frequency band. In one embodiment, since the third resonance has a relatively wide resonance frequency band, the second communication frequency band can have a relatively wide bandwidth.

[0020] Combined with the first aspect, in some implementation manners of the first aspect, the length of the second radiator between the connection point and the ground end of the second radiator is greater than two-thirds of the length of the second radiator.

[0021] Combined with the first aspect, in some implementation manners of the first aspect, the second communication frequency band includes the 2.4G and 5G frequency bands in WiFi, and / or the Bluetooth frequency band.

[0022] According to the embodiments of the present application, the connection point is within the above region (the distance from the ground end is greater than two-thirds of the length L3 of the second radiator, and the distance from the open end is greater than two-thirds of the length L3 of the second radiator). When the third radiator generates resonance, the current path extends and increases, which can further increase the radiation aperture of the third radiator and improve the radiation characteristics (such as radiation efficiency) of the antenna in the first communication frequency band. However, when the second radiator generates resonance, this region does not have a strong current, and the current transmitted from the second radiator to the third radiator will have a great impact on the third resonance (for example, the offset of the resonance point frequency of the third resonance is greater than 50 MHz), and the third resonance can have a relatively narrow resonance frequency band. In one embodiment, since the third resonance has a relatively narrow resonance frequency band, the second communication frequency band can have a relatively narrow bandwidth and can include a relatively narrow communication frequency band.

[0023] Combined with the first aspect, in some implementation manners of the first aspect, the antenna further includes a parasitic stub; the first end of the parasitic stub is connected to the second connection point of the first radiator or the second radiator; wherein, the parasitic stub is used to generate a fourth resonance; the length of the parasitic stub is less than the length of the first radiator and less than the length of the third radiator.

[0024] According to the embodiments of the present application, the parasitic stub can generate additional resonance and can be used to expand the communication frequency band of the antenna.

[0025] In combination with the first aspect, in some implementations of the first aspect, it is connected based on the first connection point between the first end of the parasitic stub and the second radiator; the feeding point coincides with the second connection point, and the first feeding circuit is coupled to the parasitic stub.

[0026] According to the embodiments of the present application, the structure of the antenna is simpler, which is beneficial to realizing miniaturization.

[0027] In combination with the first aspect, in some implementations of the first aspect, the antenna further includes a second feeding circuit and a filtering circuit; the connection port of the filtering circuit is coupled to the feeding point, the first port of the filtering circuit is coupled to the first feeding circuit, and the second port of the filtering circuit is coupled to the second feeding circuit.

[0028] In combination with the first aspect, in some implementations of the first aspect, at the resonance point of the first resonance, the currents on the first radiator are in the same direction; at the resonance point of the second resonance, the currents on the first radiator are in the same direction.

[0029] In combination with the first aspect, in some implementations of the first aspect, at the resonance point of the first resonance, the currents on the third radiator are in the same direction; at the resonance point of the second resonance, the currents on the third radiator are in the same direction.

[0030] According to the embodiments of the present application, the first resonance and the second resonance can be generated corresponding to the slot CM mode / line CM mode, so that the antenna has good radiation characteristics (such as radiation efficiency) in the resonance frequency bands of the first resonance and the second resonance.

[0031] In combination with the first aspect, in some implementations of the first aspect, the distance D between the first radiator and the third radiator is less than or equal to 5 mm.

[0032] In combination with the first aspect, in some implementations of the first aspect, the distance D between the first radiator and the third radiator is greater than or equal to 0.5 mm.

[0033] According to the embodiments of the present application, when the distance D between the third radiator and the first radiator is within the above range, good coupling characteristics can be achieved between the third radiator and the first radiator.

[0034] In combination with the first aspect, in some implementations of the first aspect, the ratio of the length of the overlapping part of the third radiator and the first radiator along the first direction to the length of the first radiator is greater than or equal to 25% and less than or equal to 75%.

[0035] According to the embodiments of the present application, when the above ratio is greater than or equal to 20%, the first radiator can be better excited, and the antenna has better radiation characteristics.

[0036] In combination with the first aspect, in some implementations of the first aspect, the third radiator at least partially overlaps with the floor in a second direction, and the second direction is the thickness direction of the electronic device.

[0037] In combination with the first aspect, in some 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 floor; wherein, the third radiator is located between the battery compartment and the frame.

[0038] In combination with the first aspect, in some implementations of the first aspect, the distance between the floor and the radiator is less than or equal to 1.5 mm.

[0039] In combination with the first aspect, in some implementations of the first aspect, the third radiator and the second radiator are integrally formed.

[0040] According to the embodiments of the present application, the third radiator, the frame, 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. Description of the Drawings

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

[0042] Figure 2 is a schematic diagram of the structure of a common-mode of an antenna provided by the present application and the corresponding current and electric field distributions.

[0043] Figure 3 is a schematic diagram of the structure of a differential-mode of an antenna provided by the present application and the corresponding current and electric field distributions.

[0044] Figure 4 is a distribution diagram of the structure of a common-mode of an antenna provided by the present application and the corresponding current, electric field, and magnetic current.

[0045] Figure 5 is a distribution diagram of the structure of a differential-mode of an antenna provided by the present application and the corresponding current, electric field, and magnetic current.

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

[0047] Figure 7 is Figure 6 the S-parameter simulation result of the antenna 100 in the shown electronic device 10.

[0048] Figure 8 is Figure 6Simulation results of the system efficiency and radiation efficiency of the antenna 100 in the electronic device 10 shown.

[0049] Figure 9 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0050] Figure 10 Is Figure 9 Simulation results of the S parameters of the antenna 200 in the electronic device 10 shown.

[0051] Figure 11 Is Figure 9 Simulation results of the system efficiency and radiation efficiency of the antenna 200 in the electronic device 10 shown.

[0052] Figure 12 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0053] Figure 13 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0054] Figure 14 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0055] Figure 15 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0056] Figure 16 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0057] Figure 17 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0058] Figure 18 Is Figure 14 Simulation results of the S parameters of the antenna 200 shown.

[0059] Figure 19 Is Figure 14 Simulation results of the radiation efficiency and system efficiency of the antenna 200 shown.

[0060] Figure 20 Is Figure 14 Schematic diagram of the current distribution of the antenna 200 at the resonance point of the first resonance (for example, 0.85 GHz) shown.

[0061] Figure 21 Is Figure 14 Schematic diagram of the current distribution of the antenna 200 at the resonance point of the second resonance (for example, 0.96 GHz) shown.

[0062] Figure 22It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0063] Figure 23 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0064] Figure 24 It is Figure 23 The simulation result of the S parameter of the antenna 200 shown when an electrical signal is fed into the first feeding unit.

[0065] Figure 25 It is Figure 23 The simulation results of the radiation efficiency and system efficiency of the antenna 200 shown when an electrical signal is fed into the first feeding unit.

[0066] Figure 26 It is Figure 23 The simulation result of the S parameter of the antenna 200 shown when an electrical signal is fed into the second feeding unit.

[0067] Figure 27 It is Figure 23 The simulation results of the radiation efficiency and system efficiency of the antenna 200 shown when an electrical signal is fed into the second feeding unit.

[0068] Figure 28 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0069] Figure 29 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0070] Figure 30 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application. Detailed implementation manners

[0071] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0072] It should be understood that the term "and / or" used herein is only 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 " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0073] When the present application uses "within... range", unless it is separately pointed out that the end values are not included, it is default to include the two end values of the range. For example, within the range of 1 to 5, the two values of 1 and 5 are included.

[0074] Coupling: It can be understood as direct coupling and / or indirect coupling. "Coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection", which is understood as the physical contact and electrical conduction of 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 the electrical conduction of two conductors in a non-contact manner through space. In one embodiment, indirect coupling can also be called capacitive coupling. For example, signal transmission is achieved by forming an equivalent capacitance through the coupling between the gaps of two spaced conductive parts.

[0075] Element / device: Includes at least one of lumped elements / devices and distributed elements / devices.

[0076] Lumped element / device: It refers to the general term for all elements when the size of the element is much smaller than the wavelength corresponding to the operating frequency of the circuit. For a signal, regardless of the time, the characteristics of the element always remain fixed and are independent of frequency.

[0077] Distributed element / device: Different from lumped elements, when the size of the element is about the same as or larger than the wavelength corresponding to the operating frequency of the circuit, when a signal passes through the element, the characteristics of each point of the element itself will vary with the change of the signal. At this time, the element as a whole cannot be regarded as a single entity with fixed characteristics, but should be called a distributed element.

[0078] Capacitance: It can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitor) refers to the equivalent capacitance formed by two conductive parts spaced at a certain gap.

[0079] Inductance: It can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductor elements; distributed inductance (or distributed inductor) refers to the equivalent inductance formed by a conductive part of a certain length.

[0080] Radiator: It is a device in an antenna used to receive / transmit electromagnetic wave radiation. In some cases, "antenna" is narrowly understood as the radiator, which converts the guided wave energy from the transmitter into radio waves, or converts radio waves into guided wave energy, for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator through the feeder line. 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 to the input end of the receiver through the feeder line.

[0081] The radiator may include a conductor having a specific shape and size, such as linear or 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 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). 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 portion 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.

[0082] The radiator may also include slots or slits formed on a conductor. For example, closed or semi-closed slots or slits are 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 a 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 radiates electromagnetic waves into space. In one embodiment, the radiator of the slot antenna or 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 slit antenna includes a linear radiator, which is spaced from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slit. In one embodiment, the radiator of the slot antenna or slit antenna can be implemented by a support conductor grounded at both ends, and can also be referred to as a support antenna.

[0083] 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.

[0084] In some embodiments, the electronic device may further include a test socket (or referred to as a radio frequency socket or 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.

[0085] 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.

[0086] 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 (e.g., a port (pin) of a radio frequency chip) in a transceiver; 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.

[0087] 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.

[0088] The matching circuit is a circuit used to adjust the radiation characteristics of the antenna. In one embodiment, the matching circuit is coupled between the feeding circuit and the corresponding radiator. In one embodiment, the matching circuit is coupled between the test 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 switches 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 a part of the antenna.

[0089] The grounding structure / feeding structure. The grounding structure / feeding structure can include connecting members, such as metal shrapnel. 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.

[0090] 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 an endpoint or end that is 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 that is coupled to other conductive structures. For example, the feeding end / feeding point can be a coupling area on the antenna radiator that is coupled 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 that is coupled to the grounding structure.

[0091] 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 and connected through the open end to transfer coupled energy (which can be understood as transferring current).

[0092] 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 maximum point on the radiator, or can also be understood as the electric field minimum point 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 maximum point / electric field minimum point. 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 maximum point / electric field minimum point.

[0093] 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 minimum point on the radiator, or can also be understood as the electric field maximum point 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 minimum point / electric field maximum point.

[0094] 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 the open end or the floating end) can make the radiator end be the current maximum point / electric field minimum point. In this case, it should be understood that the radiator end at this slit is actually the closed end or the grounded end, etc.

[0095] 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.

[0096] It should be understood that the "floating" in the "floating end" and the "floating radiator" does not mean that there is no any 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.

[0097] In the embodiments of the present application, the same / different directions of current mentioned should be understood as the directions of the main current on the conductors on the same side being the same / different. For example, when exciting a current with a same-direction distribution (e.g., the current path is also bent or circular) on a conductor in a bent or circular shape, it should be understood that, for example, although the main currents excited on the conductors on both sides of a circular conductor (e.g., the conductors around a gap, on the conductors on both sides of the gap) seem to be in opposite directions, they still fall within the definition of the current with a same-direction distribution in the embodiments of the present application. In one embodiment, the same direction of current on a conductor may mean that there is no reverse point in the current on the conductor. In one embodiment, the reverse direction of current on a conductor may mean that there is at least one reverse point in the current on the conductor. In one embodiment, the same direction of current on two conductors may 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 current on two conductors may mean that there is no reverse point in the currents on both conductors and they flow in opposite directions. The same / different directions of current on multiple conductors can be understood accordingly.

[0098] In the embodiments of the present application, the same / different directions of electric field mentioned should be understood as the directions of the main electric fields (e.g., the electric field between the conductor and the floor) generated by the conductor in space being the same / different. For example, when exciting an electric field with a same-direction distribution (e.g., the gap formed between the floor and the conductor is also bent or circular) on a conductor in a bent or circular shape, 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 a circular conductor (e.g., the conductors around a gap, in the gaps on both sides of the gap) seem to be in opposite directions, they still fall within the definition of the electric field with a same-direction distribution in the embodiments of the present application. In one embodiment, the same direction of the electric field between a conductor and the floor may 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 may 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 may mean that there is no reverse point in the electric fields between both conductors and the floor and they radiate in the same direction (e.g., the positive z-axis direction). In one embodiment, the reverse direction of the electric fields between two conductors and the floor may 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.

[0099] 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 in which 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 if there is no additional description, the "first / second... resonance" generated by the antenna / radiator mentioned in this application, where 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.

[0100] 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.

[0101] Communication Frequency Band / Operating Frequency Band: No matter what type of antenna, it always operates within a certain frequency range (frequency band width). For example, an antenna that supports Band B40 has an operating frequency band including frequencies within 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.

[0102] 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.

[0103] 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 transmitted electromagnetic wave. The electrical length can satisfy the following formula:

[0104]

[0105] where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0106] 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 is 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.

[0107] It should be understood that the wavelength of the radiated 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 radiated signal (MHz), and the speed of light can be taken as 3×10^8 m / s. The wavelength of the radiated signal in a medium can be calculated as follows: Among them, ε is the relative permittivity of the medium. The wavelength in the embodiments of the present application generally refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency or the 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 is 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 permittivity of the medium filled on one side or multiple sides of the radiator.

[0108] 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.

[0109] Antenna system efficiency (total efficiency): It refers to the ratio of the input power to the output power at the port of the antenna.

[0110] 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 that measures the radiation ability of the antenna, and both metal loss and dielectric loss are influencing factors of the radiation efficiency.

[0111] 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.

[0112] 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 larger 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.

[0113] 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.

[0114] 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.

[0115] It should be understood that in the embodiments of the present application, the fact that the first communication frequency band and the second communication frequency band are the same (also referred to as the same frequency) can be understood as any one of the following situations:

[0116] The first communication frequency band and the second communication frequency band include the same communication frequency band. In one embodiment, the first communication frequency band and the second communication frequency band can be applied to a MIMO antenna system. For example, if both the first communication frequency band and the second communication frequency band include the sub-6G frequency band in 5G, then it can be considered that the first communication frequency band and the second communication frequency band are of the same frequency.

[0117] At least part of the frequencies of the first communication frequency band and the second communication frequency band overlap. For example, the first communication frequency band includes B35 (1.85 - 1.91 GHz) in LTE, and the second communication frequency band includes B39 (1.88 - 1.92 GHz) in LTE. Since part of the frequencies of the first communication frequency band and the second communication frequency band overlap, it can be considered that the first communication frequency band and the second communication frequency band are of the same frequency.

[0118] It should be understood that in the embodiments of the present application, the fact that the first communication frequency band and the second communication frequency band are adjacent can be understood as:

[0119] Among the first communication frequency band and the second communication frequency band, the spacing between the starting frequency point of the higher frequency band and the ending frequency point of the lower frequency band is less than 10% of the center frequency of the higher frequency band (or, the spacing is less than or equal to 200 MHz). For example, the first communication frequency band includes B3 (1.71 - 1.785 GHz) in LTE, and the second communication frequency band includes L1 (1578.42 ± 1.023 MHz) in GPS. If B3 (1.71 - 1.785 GHz) and L1 (1578.42 ± 1.023 MHz) are adjacent frequency bands, then the first communication frequency band and the second communication frequency band can be considered adjacent. Or for another example, the first communication frequency band includes B40 (2.3 - 2.4 GHz) or B41 (2.496 - 2.69 GHz) in LTE, and the second communication frequency band includes the WiFi / BT frequency band (2.4 - 2.485 GHz). If B40 (2.3 - 2.4 GHz) or B41 (2.496 - 2.69 GHz) and the WiFi / BT frequency band (2.4 - 2.485 GHz) are adjacent frequency bands, then the first communication frequency band and the second communication frequency band can be considered adjacent.

[0120] Ground (GND): It can generally refer to at least a part of any ground layer, ground plane, or ground metal layer, etc. inside an electronic device (such as a mobile phone), or at least a part of any arbitrary combination of the above-mentioned ground layer, ground plane, or ground components, etc. "Ground" can be used for grounding components inside 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, polymer, 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, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on 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 disposed on the trace layer.

[0121] Any of the above ground layers, or ground plates, or ground metal layers 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, graphite-coated substrate, copper-plated substrate, brass-plated substrate, and aluminum-plated substrate. Those skilled in the art can understand that the ground layer / ground plate / ground metal layer can also be made of other conductive materials.

[0122] Grounding: It refers to achieving coupling with the above ground / floor in any way. In one embodiment, grounding can be through physical grounding, such as achieving physical grounding (or called, physical ground) at specific positions on the frame through some structural components of the middle frame. In one embodiment, grounding can be through device grounding, such as grounding through devices such as capacitors / inductors / resistors connected in series or in parallel (or called, device ground).

[0123] Next, the technical solutions of the embodiments of the present application will be described in conjunction with the drawings.

[0124] 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 can be a cover glass, or can be replaced with a cover made of other materials, such as a cover made of PET (Polyethylene terephthalate) material, etc.

[0125] Among them, the cover 13 can be disposed closely to the display module 15, and can mainly be used to protect the display module 15 and prevent dust.

[0126] In one embodiment, the display module 15 may include a liquid crystal display panel (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and the embodiments of the present application do not limit this.

[0127] The middle frame 19 mainly plays a supporting role for the whole machine. Figure 1As shown in the figure, 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, etc. 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, etc. In one embodiment, a metal layer may be provided on the printed circuit board PCB 17. The 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. The metal layer can be called a floor, or a ground plane, or a ground layer. In one embodiment, the metal layer can be formed by etching metal on the surface of any layer of the dielectric board in the PCB 17. In one embodiment, the metal layer for grounding can be disposed on one 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, and will not be elaborated here.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] It should be understood that the frame 11 may have insulating gaps, and the conductor portion of the frame between two insulating gaps or between an insulating gap and a ground point serves as a 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 opened in the conductor portion inside the frame 11, which 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.

[0133] 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 outer shell or housing 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 outer shell or housing of the electronic device 10. It should be understood that the "outer shell or housing" 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.

[0134] The frame 11 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. There may be a gap between this part of the frame serving as the radiator and other parts of the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment. In one embodiment, the middle frame 19 may be provided with apertures at this part of the frame serving as the radiator to facilitate the radiation of the antenna.

[0135] Alternatively, the frame 11 may not be regarded as a part of the middle frame 19. In one embodiment, the frame 11 may be connected to and integrally formed with the middle frame 19. In another embodiment, the frame 11 may include a protruding member extending inward to be connected to the middle frame 19, for example, connected by a shrapnel, a screw, welding, etc. The protruding member of the frame 11 can also be used to receive a feed signal, so that at least a part of the frame 11 serves as an antenna radiator to receive / transmit radio frequency signals. There may be a gap 42 between this part of the frame serving as the radiator and the middle frame 30, so as to ensure that the antenna radiator has a good radiation environment and enable the antenna to have a good signal transmission function.

[0136] Among them, the rear cover 21 can be a rear cover made of a metal material; it can also be a rear cover made of a 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 and non-conductive materials. In one embodiment, the rear cover 21 including a conductive material can replace the middle frame 19 and, together with the frame 11, serve as a single piece to support the electronic devices in the whole machine.

[0137] 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, the PCB 17, etc. of the electronic device can be grounded through electrical connection with the middle frame.

[0138] 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 a 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 be arranged close to the frame 11. For example, there can be a certain small gap between the antenna radiator and the frame 11.

[0139] 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 of the antenna disposed in the housing can be obtained by a slit / aperture on any one of the middle frame, and / or the side frame, and / or the rear cover, and / or the display screen, or by a non-conductive gap / aperture formed between any of them. The setting of the clearance of the antenna can ensure the radiation characteristics of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive component in the electronic device 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 in the screen of the electronic device 10, so that the antenna is a transparent antenna unit embedded in the screen of the electronic device 10.

[0140] Figure 1 Only some components included in the electronic device 10 are schematically shown, and the actual shape, actual size, and actual structure of these components are not limited by Figure 1 defined.

[0141] 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, the surface where the rear cover is located can be regarded as the back, and the surface where the side frame is located can be regarded as the side.

[0142] 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.

[0143] First, Figures 2 to 5 will be 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 the present application and the corresponding current and electric field distributions. Figure 3 is a schematic diagram of the structure of a differential mode of another antenna provided by 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 the line common mode and the line differential mode. Figure 4 is a schematic diagram of the structure of a common mode of an antenna provided by the present application and the corresponding current, electric field, and magnetic current distributions. Figure 5It is a schematic diagram showing the structure of the differential mode of another antenna provided by this application, as well as the corresponding distributions of current, electric field, and magnetic current. Figure 4 and Figure 5 The two ends of the antenna radiator in Figure 5 are grounded, and its common mode and differential mode can be respectively referred to as the slot common mode and the slot differential mode.

[0144] It should be understood that the "common mode" or "CM mode" in this application includes the line common mode and the slot common mode, while the "differential mode" or "DM mode" in this application includes the line differential mode and the slot differential mode, which can be specifically determined according to the structure of the antenna.

[0145] It should be understood that the "common-differential mode" or "CM-DM mode" in this application refers to the line common mode and the line differential mode generated on the same radiator, or refers to the slot common mode and the slot differential mode generated on the same radiator, which can be specifically determined according to the structure of the antenna.

[0146] 1. Line common mode (CM)

[0147] Figure 2 In (a) of Figure 2 , it shows that 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, where 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).

[0148] 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 part of the feeding wire 42 and antenna 40 covers the middle position 41.

[0149] Figure 2 In (b) of Figure 2 , it shows the current and electric field distributions of antenna 40. As Figure 2 shown in (b) of Figure 2 , 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 Figure 2 , 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 Figure 2 can be called line CM feeding. Based on the reverse distribution of the current on both sides of the connection part of the radiator and the feeding wire 42, Figure 2The antenna pattern shown in (b) therein can be called the line CM mode (which can also be simply referred to as the 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) therein can be respectively called the current and electric field of the line CM mode.

[0150] The current is stronger at the middle position 41 of the antenna 40 (the current maximum point is near the middle position 41 of the antenna 40), and weaker at both ends of the antenna 40, as Figure 2 shown in (b) therein. The electric field is weaker at the middle position 41 of the antenna 40 and stronger at both ends of the antenna 40.

[0151] 2. Line differential mode (DM)

[0152] As Figure 3 shown in (a) therein, the left and right ends of the two radiators of the antenna 50 are open ends, and a 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 a 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.

[0153] It should be understood that the "central anti-symmetrical feed" mentioned in this application can be understood as that the positive and negative poles of the feeding unit are respectively connected to two connection points near the above-mentioned midpoints of the radiators. In one embodiment, the signal amplitudes output by the positive and negative poles of the feeding unit are the same, and the phases are opposite, for example, the phase difference is 180°±10°.

[0154] Figure 3 shown in (b) therein shows the current and electric field distributions of the antenna 50. As Figure 3 shown in (b) therein, 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) therein, the current at the feeding wire 52 shows an anti-directional distribution. Based on the anti-directional distribution of the current at the feeding wire 52, Figure 3 the feeding shown in (a) therein can be called line DM feeding. Based on the co-directional distribution of the current on both sides of the connection between the radiator and the feeding wire 52, Figure 3 the antenna pattern shown in (b) therein can be called the line DM mode (which can also be simply referred to as the DM mode. For example, for a line antenna, the DM mode refers to the line DM mode). Figure 3 The current and electric field shown in (b) therein can be respectively called the current and electric field of the line DM mode.

[0155] The current is stronger at the middle position 51 of the antenna 50 (the current maximum is near the middle position 51 of the antenna 50), and weaker at both ends of the antenna 50, as shown in (b) of Figure 3 . The electric field is weaker at the middle position 51 of the antenna 50 and stronger at both ends of the linear antenna 50.

[0156] It should be understood that for an antenna radiator, it can be understood as a metal structural member that generates radiation, and the number can be one, as shown in Figure 2 , or it can also be two, as shown in Figure 3 . It can be adjusted according to actual design or production needs. For example, for the line CM mode, two radiators can also be used as shown in Figure 3 . The two ends of the two radiators are arranged oppositely and separated by a gap, and a symmetric feeding method is adopted at the two ends close to each other. 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 the antenna structure shown in Figure 2 can also be obtained. Correspondingly, for the line DM mode, one radiator can also be used as shown in Figure 2 . 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 the two symmetric feeding points on the radiator respectively, and similar effects to the antenna structure shown in Figure 3 can also be obtained.

[0157] 3. Line CM - DM mode

[0158] The above Figure 2 and Figure 3 respectively show the line CM mode and the line DM mode generated by different feeding methods when both ends of the radiator are open.

[0159] 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 point 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 (b) of Figure 2 . The second resonance corresponds to the line DM mode, and the current and electric field distributions are as shown in (b) of Figure 3 .

[0160] 4. Slot CM mode

[0161] Figure 4The radiator of the antenna 60 shown in (a) has a hollow slot or gap 61, or the radiator of the antenna 60 and the ground (for example, the floor, which can be a PCB) enclose the slot or slot 61. The slot 61 can be formed by grooving the floor. An opening 62 is provided on one side of the slot 61, and the opening 62 can be specifically opened in the middle position of the side. The middle position of the side of the slot 61 can be, for example, the geometric midpoint of the antenna 60, or the midpoint of the electrical length of the radiator, for example, the area where the opening 62 is opened on the radiator covers the middle position of the side. The opening 62 can be connected to the feeding circuit, and antisymmetric feeding can be used. It should be understood that antisymmetric feeding can be understood as the positive and negative poles of the feeding circuit are respectively connected to the two ends of the radiator. The signals output by the positive and negative poles of the feeding circuit have the same amplitude and opposite phases, for example, the phase difference is 180°±10°.

[0162] Figure 4 (b) in FIG. 6 shows the current, electric field, and magnetic current distribution of the antenna 60. Figure 4 As shown in (b) of FIG. 1 , the current on the conductor (such as the floor, and / or the radiator 60) around the slot 61 is distributed in the same direction around the slot 61, the electric field is distributed in opposite directions on both sides of the middle position of the slot 61, and the magnetic current is distributed in opposite directions on both sides of the middle position of the slot 61. Figure 4 As shown in (b), the electric field at the opening 62 (e.g., the feeding point) is in the same direction, and the magnetic current at the opening 62 (e.g., the feeding point) is in the same direction. Based on the same direction of the magnetic current at the opening 62 (the feeding point), Figure 4 The feeding shown in (a) of FIG. 6 is referred to as slot CM feeding. Based on the current being distributed in the same direction (e.g., anti-symmetric distribution) on the radiators on both sides of the opening 62, or based on the current being distributed in the same direction around the slot 61 on the conductors around the slot 61, Figure 4 The antenna mode shown in (b) can be called a slot CM mode (also referred to as a CM mode for short. For example, for a slot antenna, the CM mode refers to a slot CM mode). Figure 4 The electric field, current, and magnetic current distributions shown in (b) can be called the electric field, current, and magnetic current of the slot CM mode.

[0163] The magnetic field is weak in the middle of the antenna 60 and strong at both ends of the antenna 60. The electric field is strong in the middle of the antenna 60 (the largest point of the electric field is located near the middle of the antenna 60) and weak at both ends of the antenna 60, such as Figure 4 As shown in (b) in .

[0164] 5. Slot DM mode

[0165] like Figure 5The radiator of the antenna 70 shown in (a) therein has a hollowed-out groove or slit 72, or alternatively, the radiator of the antenna 70 and the ground (such as the floor, which can be a PCB) enclose the groove or slit 72. The groove 72 can be formed by grooving on the floor. A feeding circuit is connected at the middle position 71 of the groove 72, and symmetric feeding is adopted. It should be understood that symmetric feeding 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, for example, can be the midpoint of the geometric structure, or the midpoint of the electrical length (or a region within a certain range near the above midpoint). The positive pole of the feeding circuit is connected to the middle position of one side of the groove 72, and the negative pole of the feeding circuit is connected to the middle position of the other side of the groove 72. The middle position of the side of the groove 72, for example, can be the middle position of the slot antenna 60 / the middle position of the ground, such as the geometric midpoint of the slot antenna, or the midpoint of the electrical length of the radiator. For example, the connection position of the feeding circuit and the radiator covers the middle position 51 of this side.

[0166] Figure 5 (b) therein shows the current, electric field, and magnetic current distributions of the antenna 70. As Figure 5 shown in (b) therein, on the conductors (such as the floor and / or the radiator 60) around the groove 72, the current is distributed around the groove 72 and is distributed in opposite directions on both sides of the middle position of the groove 72. The electric field is distributed in the same direction on both sides of the middle position 71, and the magnetic current is distributed in the same direction on both sides of the middle position 71. The magnetic current at the feeding circuit is distributed in opposite directions (not shown). Based on the magnetic current at the feeding circuit being distributed in opposite directions, Figure 5 this kind of feeding shown in (a) therein can be called slot DM feeding. Based on the current being distributed in opposite directions (such as symmetrically distributed) on both sides of the connection position of the feeding circuit and the radiator, or based on the current being distributed in opposite directions (such as symmetrically distributed) around the slit 71, Figure 5 this kind of antenna mode shown in (b) therein can be called the slot DM mode (which can also be simply called the DM mode. For example, for a slot antenna, the DM mode refers to the slot DM mode). Figure 5 The electric field, current, and magnetic current distributions shown in (b) therein can be called the electric field, current, and magnetic current of the slot DM mode.

[0167] The current is weaker at the middle position of the antenna 70 and stronger at both ends of the antenna 70. The electric field is stronger at the middle position of the antenna 70 (the electric field maximum point is near the middle position of the antenna 60) and weaker at both ends of the slot antenna 70, as Figure 5 shown in (b) therein.

[0168] It should be understood that for the radiator of the antenna, it can be understood as a metal structural member that generates radiation (such as including a part of the floor), and it can include openings, as Figure 4 shown, or it can also be a complete ring, asFigure 5 As shown, it can be adjusted according to actual design or production requirements. For example, for the slot CM mode, it can also be like Figure 5 shown, a complete annular radiator is adopted, two feeding points are arranged at the middle position of the radiator on one side of the slot 61, and anti-symmetric feeding is adopted. For example, signals with the same amplitude and opposite phases are fed into both ends of the original opening position, and similar effects to the Figure 4 antenna structure shown can also be obtained. Correspondingly, for the slot DM mode, it can also be like Figure 4 shown, a radiator including an opening is adopted, and symmetric feeding is adopted at both ends of the opening position. For example, the same feed source signal is fed into both ends of the radiator on both sides of the opening, and similar effects to the Figure 5 antenna structure shown can also be obtained.

[0169] 6. Slot CM-DM mode.

[0170] The above Figure 4 and Figure 5 respectively show that different feeding methods are adopted for the slot structure to generate the slot CM mode and the slot DM mode respectively.

[0171] When the feeding form of the antenna adopts asymmetric feeding (the feeding point deviates from the middle position, including edge feeding or off-center feeding), or the opening on one side of the slot is asymmetric (the opening deviates from the middle position of that side), the antenna can simultaneously generate the first resonance and the second resonance, corresponding to the slot CM mode and the slot DM mode respectively. For example, the first resonance corresponds to the slot CM mode, and the current, electric field, and magnetic current distributions are as shown in Figure 4 (b) in. The second resonance corresponds to the slot DM mode, and the current, electric field, and magnetic current distributions are as shown in Figure 5 (b) in.

[0172] Since the above antenna structures can all generate two operating modes with orthogonal electric fields (the inner product of the electric fields in the far field is zero (integral orthogonality)) (the electric fields are symmetrically distributed or anti-symmetrically distributed), the isolation between the two operating modes of this antenna structure is relatively good, and it can be applied to the multi-input multi-output (MIMO) antenna system in electronic devices.

[0173] At the same time, when two antenna structures respectively operate in two operating modes with orthogonal electric fields (the inner product of the electric fields in the far field is zero (integral orthogonality)) (the electric fields are symmetrically distributed or anti-symmetrically distributed), there is also good isolation between the two antenna structures, and they can be used as sub-units in the MIMO antenna system of electronic devices.

[0174] It should be understood that the two antenna structures can be understood as antenna structures fed with signals by a first feeding circuit and a second feeding circuit respectively. The first feeding circuit and the second feeding circuit are different. In an electronic device, the first feeding circuit and the second feeding circuit can be different radio frequency channels in a radio frequency chip (RF IC).

[0175] Figure 6 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0176] As Figure 6 shown, the electronic device 10 may include an antenna 100.

[0177] The conductive frame 11 of the electronic device 10 may include a first position 101 and a second position 102. The frame 11 is coupled to the ground at the first position 101 and the second position 102, and an insulating gap is formed between the first position and the second position. The radiator 105 of the antenna 100 is a conductive part between the first position 101 and the second position 102.

[0178] The antenna 100 may further include a feeding circuit and electronic components. The radiator 105 may include a first connection point and a second connection point. The first connection point is located between the first position 101 and the insulating gap, and the second connection point is located between the second position 102 and the insulating gap. The feeding circuit is coupled to the first connection point. The first end of the electronic component is coupled to the second connection point, and the second end is coupled to the ground.

[0179] When the feeding circuit feeds an electrical signal, the antenna 100 can operate in the above-mentioned slot CM-DM mode. Through the electronic component, the resonances generated by the slot CM mode and the slot DM mode can be made closer, jointly forming a resonant frequency band to expand the operating bandwidth of the antenna 100. In one embodiment, the electronic component can shift the frequency of the resonance generated by the slot DM towards the low frequency.

[0180] Figure 7 and Figure 8 is Figure 6 the simulation result of the antenna 200 in the electronic device 10 shown. Among them, Figure 7 is Figure 6 the S-parameter simulation result of the antenna 100 in the electronic device 10 shown. Figure 8 is Figure 6 the simulation results of the system efficiency and radiation efficiency of the antenna 100 in the electronic device 10 shown.

[0181] As Figure 7 shown, the antenna 100 can generate resonances near 1.7 GHz and near 2 GHz. Among them, the resonance generated near 1.7 GHz can correspond to the slot CM mode, and the resonance generated near 2 GHz can correspond to the slot DM mode.

[0182] As Figure 8 shown, since when the antenna 100 operates in the slot CM mode, there are multiple current modes on the ground plane, while the slot DM mode mainly generates radiation by the radiator, the radiation efficiency of the slot CM mode is higher than that of the slot DM mode. When using the resonances generated by the slot CM mode and the slot DM mode to expand the operating bandwidth of the antenna 100, due to the lower radiation efficiency of the slot DM mode, pits will be generated near the resonance generated by the slot DM mode, resulting in a narrow bandwidth of the system efficiency (taking the system efficiency > -2 dB as an example), only 400 MHz.

[0183] The embodiment of the present application provides an electronic device, including an antenna. The antenna uses the conductive part of the frame of the electronic device and the metal parts arranged inside as the radiator. The radiator arranged inside can extend the current path through the frame, so that the antenna has good radiation efficiency and system efficiency in the resonant frequency band.

[0184] Figure 9 is a schematic diagram of another electronic device 10 provided by the embodiment of the present application.

[0185] As Figure 9 shown, the electronic device 10 includes a frame 11, an antenna 200, and a ground plane 300.

[0186] At least part of the frame 11 is spaced apart from the ground plane 300. The frame 11 includes a first position 201 and a second position 202. The frame 11 is coupled to the ground plane 300 at the first position 201 and the second position 202. The frame 11 has a first insulating gap opened between the first position 201 and the second position 202.

[0187] Meanwhile, for the sake of simplicity of discussion, in the embodiment of the present application, the coupled connection is described by taking direct coupling (electrical connection) as an example. In actual production or design, it can also be realized by indirect coupling.

[0188] In one embodiment, the frame 11 has a first insulating gap opened between the first position 201 and the second position 202.

[0189] The antenna 200 includes a first radiator 210 and a second radiator 220. The first radiator 210 and the second radiator 220 are spaced apart and at least partially overlap in a first direction, which is a direction perpendicular to the extending direction of the first radiator 210 (e.g., the y direction). The first radiator 210 is the conductive part of the frame 11 between the first position 201 and the second position 202. The first end and the second end of the first radiator 210 are grounding ends, where the first end and the second end of the first radiator 210 respectively correspond to the first position 201 and the second position 202 of the frame 11. The first end and the second end of the second radiator 220 are open ends.

[0190] It should be understood that the extending direction of the first radiator 210 can be understood as the extending direction of the frame where the first position 201 or the second position 202 is located. For example, both the first position 201 and the second position 202 are located on the first side of the frame, and the extending direction of the first radiator 210 is the extending direction of the first side (e.g., the x direction). Or, the first position 201 and the second position 202 are respectively located on the first side and the second side where the frame intersects at an angle. The extending direction of the first radiator 210 includes the extending direction of the first side (e.g., the x direction) and the extending direction of the second side (e.g., the y direction). The first radiator 210 and the second radiator 220 at least partially overlap in a direction perpendicular to any direction in the extending direction of the first radiator 210.

[0191] Meanwhile, the first radiator 210 and the second radiator 220 being spaced apart can be understood as the first radiator 210 and the second radiator 220 not being directly connected and forming a gap. In the embodiments of the present application, the spaced-apart setting can be understood accordingly. The first radiator 210 and the second radiator 220 are coupled through this gap.

[0192] The antenna 200 further includes a feeding circuit 231. The second radiator 220 includes a feeding point 211, and the feeding circuit 231 is coupled to the feeding point 211. The second radiator 220 and the first radiator 210 are used to generate a first resonance and a second resonance. In one embodiment, the first resonance and the second resonance are used to jointly support an operating frequency band of the electronic device 10.

[0193] It should be understood that for the technical solution provided in the embodiments of the present application, the first radiator 210 can form a radiator structure conforming to a slot antenna. When the feeding circuit 231 feeds in an electrical signal, the antenna 200 can generate the above-mentioned first resonance and second resonance. In the electronic device 10, compared with the first radiator 210 (where the conductive part in the frame 11 serves as the first radiator 210), the radiation environment of the second radiator 220 is relatively poor (for example, the clearance is poor and it is close to adjacent metal components). However, the second radiator 220 can generate a new current path for the first radiator 210, thereby generating a new resonance (for example, the second resonance) to expand the operating bandwidth of the antenna 200.

[0194] Meanwhile, since the first end and the second end of the first radiator 210 are grounded ends, the first radiator 210 has a strong current and a weak electric field in the vicinity of the first end and the second end. While the first end and the second end of the second radiator 220 are open ends, the second radiator 220 has a weak current and a strong electric field in the vicinity of the first end and the second end. The region with a weak electric field (strong magnetic field) of the first radiator 210 is close to the region with a strong electric field (strong magnetic field) of the second radiator 220, which can make the first resonance and the second resonance relatively balanced, and there will be no pit in the radiation efficiency in the first operating frequency band supported by the first resonance and the second resonance, thereby improving the radiation characteristics of the antenna 200 and enabling the electronic device 10 to have better communication performance.

[0195] In one embodiment, at the resonance point of the first resonance, the currents on the first radiator 210 on both sides of the first insulating gap are in the same direction, and on the first radiator 210 on both sides of the first insulating gap, there are respectively distributed currents in the same direction (or rather, there is no current reversal point on the radiator). At the resonance point of the second resonance, the currents on the first radiator 210 on both sides of the first insulating gap are in the same direction, and on the first radiator 210 on both sides of the first insulating gap, there are respectively distributed currents in the same direction (or rather, there is no current reversal point on the radiator).

[0196] It should be understood that the above-mentioned currents in the same direction can be understood as the current flowing from one end to the other end. For example, the current on the first radiator 210 flows from the first position 201 (the first end) to the second position 202 (the second end), or from the second position 202 (the second end) to the first position 201 (the first end). Or, the above-mentioned currents in the same direction can be understood as that on the path of the current flow, the currents are distributed in the same direction and there is no current reversal point. For the sake of concise discussion, the currents in the same direction mentioned in the embodiments of the present application can be understood accordingly.

[0197] It should be understood that both the first resonance and the second resonance can be regarded as being generated by the slot CM mode. Since the slot CM mode has a high radiation efficiency and system efficiency, the antenna has good radiation efficiency and system efficiency within the operating frequency band formed by the first resonance and the second resonance.

[0198] In one embodiment, at the resonance point of the first resonance and the resonance point of the second resonance, the currents on the second radiator 220 are in the same direction.

[0199] It should be understood that the current on the second radiator 220 can be generated by the line DM mode. The first radiator 210 generates a current in the same direction through the coupling of the currents in the same direction on the second radiator 220, thereby generating the second resonance.

[0200] Figure 10 and Figure 11 is Figure 9 the simulation result of the antenna 200 in the electronic device 10 shown in. Among them, Figure 10 is Figure 9 the S-parameter simulation result of the antenna 200 in the electronic device 10 shown in. Figure 11 is Figure 9 the simulation results of the system efficiency and radiation efficiency of the antenna 200 in the electronic device 10 shown in.

[0201] As Figure 10 shown, the antenna 200 can generate resonances near 1.87 GHz, near 2.23 GHz, and near 3.19 GHz, but the resonance excitation generated near 3.19 GHz is weak. Among them, the resonance generated near 1.87 GHz can correspond to the first resonance in the above embodiment, and the resonance generated near 2.23 GHz can correspond to the second resonance in the above embodiment. The resonance generated near 3.19 GHz can correspond to the resonance generated by the slot DM mode.

[0202] It should be understood that for the sake of simplicity of discussion, only the example where the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance is used for illustration. In actual production, the resonance point frequency of the first resonance can also be higher than the resonance point frequency of the second resonance.

[0203] As Figure 11 shown, both the first resonance and the second resonance can be generated by the slot CM mode. Since the slot CM mode has a high radiation efficiency and system efficiency, therefore, the antenna does not generate pits in the operating frequency band formed by the first resonance and the second resonance, and has good radiation efficiency and system efficiency. Taking the system efficiency > -2 dB as an example, the system efficiency bandwidth of the antenna 200 is about 530 MHz.

[0204] Figure 12 is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0205] As Figure 12As shown, the frame 11 has a first insulating gap and a second insulating gap formed at a first position 201 and a second position 202 respectively. There is a grounding point between the first position 201 and the second position 202, and the frame 11 is coupled to the floor 300 at the grounding point.

[0206] The radiator 210 is the conductive part of the frame 11 between the first position 201 and the second position 202. The first end and the second end of the first radiator 210 are open ends, where the first end and the second end of the first radiator 210 correspond to the first position 201 and the second position 202 of the frame 11 respectively. The first end and the second end of the second radiator 220 are grounded ends.

[0207] It should be understood that compared with Figure 9 the antenna 200 in the electronic device 10 shown, Figure 12 the boundary conditions of the antenna 200 in the electronic device 10 shown are different. In Figure 9 the antenna 200 shown, the frame 11 is coupled to the floor 300 at the first position 201 and the second position 202, the first end and the second end of the first radiator 210 are grounded ends, and the first end and the second end of the second radiator 220 are open ends. While in Figure 12 the antenna 200 shown, the frame 11 has a first insulating gap and a second insulating gap formed at the first position 201 and the second position 202 respectively, the first end and the second end of the first radiator 210 are open ends, and the first end and the second end of the second radiator 220 are grounded ends.

[0208] In Figure 9 the antenna 200 shown, the first radiator 210 can form a radiator structure conforming to a slot antenna. The first resonance and the second resonance generated by the second radiator 220 and the first radiator 210 can both be regarded as being generated by the slot CM mode. Since the slot CM mode has a high radiation efficiency and system efficiency, the antenna has good radiation efficiency and system efficiency within the working frequency band formed by the first resonance and the second resonance.

[0209] Similarly, in Figure 12 the antenna 200 shown, the first radiator 210 can form a radiator structure conforming to a wire antenna. The first resonance and the second resonance generated by the second radiator 220 and the first radiator 210 can both be regarded as being generated by the wire CM mode. Since the wire CM mode has a high radiation efficiency and system efficiency, the antenna has good radiation efficiency and system efficiency within the working frequency band formed by the first resonance and the second resonance.

[0210] Figure 13 is a schematic diagram of an electronic device 10 provided by an embodiment of the present application.

[0211] As Figure 13As shown, the frame 11 opens a first insulating gap at the first position 201 and is coupled to the floor 300 at the second position 202. The first end of the first radiator 210 is an open end and the second end is a grounded end. Among them, the first end and the second end of the first radiator 210 respectively correspond to the first position 201 and the second position 202 of the frame 11. The first end of the second radiator 220 is a grounded end and the second end is an open end.

[0212] The first radiator 210 and the second radiator 220 overlap at least partially in the first direction. In one embodiment, the ratio of the length of the overlapping part of the projection of the second radiator 220 on the frame 11 and the first radiator 210 to the length of the second radiator 220 is greater than or equal to 25%. In one embodiment, the projection of the second radiator 220 on the frame 11 completely overlaps the first radiator 210.

[0213] It should be understood that in the above embodiments, the following situations are listed: (1) The first end and the second end of the first radiator 210 are grounded ends, and the first end and the second end of the second radiator 220 are open ends; (2) The first end and the second end of the first radiator 210 are open ends, and the first end and the second end of the second radiator 220 are grounded ends.

[0214] while Figure 13 The difference between the antenna 200 shown and the antenna 200 shown in the above embodiments includes that the first end of the first radiator 210 is an open end and the second end is a grounded end. The first end of the second radiator 220 is a grounded end and the second end is an open end. When an electrical signal is fed into the feeding point, the first radiator 210 can also be excited to generate a first resonance and a second resonance. And, since the first end of the first radiator 210 is an open end and the second end is a grounded end, and the first end and the second end of the second radiator 220 are grounded ends, the sizes of the first radiator 210 and the second radiator 220 can be further reduced (for example, it can be regarded as being reduced from a half-wavelength structure to a quarter-wavelength structure), realizing miniaturization.

[0215] In one embodiment, the electrical length of the first radiator 210 is one quarter of the first wavelength, the electrical length of the second radiator 220 is one quarter of the first wavelength, and the first wavelength is the wavelength corresponding to the center frequency between the resonance points of the first resonance and the second resonance.

[0216] In one embodiment, the electrical length of the first radiator 210 is the same as that of the second radiator 220. Correspondingly, the physical length of the first radiator 210 is substantially the same as that of the second radiator 220. Since the electronic components coupled to the second radiator 220 / first radiator 210 can increase or decrease the physical length while keeping the electrical length unchanged, the physical length L1 of the first radiator 210 and the physical length L2 of the second radiator 220 satisfy: L1 × 50% ≤ L2 ≤ L1. In one embodiment, the physical length L1 of the first radiator 210 and the physical length L2 of the second radiator 220 satisfy: L1 ≤ L2 ≤ L1 × 150%.

[0217] In one embodiment, the distance between the feeding point and the end (ground end) of the first end of the second radiator 220 is greater than half of the length of the second radiator 220. The second radiator 220 can form a structure similar to a left-handed antenna. The left-handed antenna can, for example, conform to an antenna with a composite right and left hand (CRLH) transmission line structure.

[0218] For the sake of brevity of discussion, Figure 13 the parts of the antenna 200 shown that are similar to those of the antenna 200 shown in the above embodiment will not be described in detail one by one. For example, the position of the first radiator 210 and its positional relationship with the second radiator 220; the first radiator 210 is used to generate a first resonance and a second resonance; the first resonance and the second resonance can be used to jointly support an operating frequency band; the width of the first insulating gap; the shape of the second radiator 220, for example, being strip-shaped; the position where the second radiator 220 is arranged, etc.

[0219] Figure 14 is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0220] As Figure 14 shown, the electronic device 10 includes a frame 11, an antenna 200, and a ground plane 300.

[0221] Among them, at least part of the frame 11 is spaced apart from the ground plane 300. The frame 11 includes a first position 201, a second position 202, and a third position 203 arranged in sequence. The frame 11 is coupled to the ground plane 300 at the first position 201. The frame 11 has a first insulating gap at the second position 202.

[0222] In one embodiment, the width of the first insulating gap is greater than or equal to 0.1 mm and less than or equal to 2 mm. It should be understood that the widths of the gaps opened on the frame in the embodiments of the present application can all be within the above range. For the sake of brevity of discussion, they will not be described in detail one by one.

[0223] In one embodiment, the first position 201 is coupled to the floor 300 to ground the radiator. Among them, at the first position 201 and the second position 202, the frame 11 can be electrically connected to the floor 300 through a shrapnel, or can be electrically connected to the floor 300 through an inductor, or through a connecting rib to the floor 300. The electrical connection through the connecting rib to the floor 300 can be understood that at least part of the frame 11 and the floor 300 are of an integral structure. For the sake of simplicity of discussion, the coupling with the floor in the embodiments of the present application can be understood accordingly. In one embodiment, the first end of the first radiator 210 (the end at the second position 202) and the first end of the second radiator 220 (the end at the second position 202) are opposite and do not contact each other.

[0224] The antenna 200 includes a first radiator 210, a second radiator 220 and a third radiator 230. Among them, the third radiator 230 can be located inside the frame 11. The inside can be understood as the side of the frame 11 facing the inside of the electronic device 10. In the thickness direction of the electronic device 10, the third radiator 230 can at least partially overlap or not overlap with the frame 11 and the first radiator 210.

[0225] The first radiator 210 is the conductive part of the frame 11 between the first position 201 and the second position 202. The second radiator 220 is the conductive part of the frame 11 between the second position 202 and the third position 203. The first end of the third radiator 230 extends towards the first radiator 210, and the second end of the third radiator 230 is connected to the connection point 241 of the second radiator 220. The first end of the third radiator 230 is an open end. The first radiator 210 and the third radiator 230 are arranged at intervals, and the first radiator 210 and the third radiator 230 at least partially overlap along the first direction, and the first direction is perpendicular to the extending direction of the first radiator 210 (for example, the y direction).

[0226] The physical length L1 of the first radiator 210, the physical length L2 of the third radiator 230, and the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 satisfy: L1×50%≤L2 + L4≤L1. In one embodiment, the physical length L1 of the first radiator 210, the physical length L2 of the third radiator 230, and the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 satisfy: L1≤L2 + L4≤L1×150%.

[0227] It should be understood that the radiators described in the embodiments of the present application can be linear, broken line, curved, etc. The physical length of the radiator can be understood as the length along the extending direction of the radiator between the end of the first end and the end of the second end of the radiator. If the radiator has multiple extending directions, the physical length of the radiator is the sum of the physical lengths in multiple extending directions.

[0228] The antenna 200 further includes a first feeding circuit 231. The third radiator 230 includes a first feeding point 211, and the first feeding circuit 231 is coupled to the first feeding point 211.

[0229] The first radiator 210, the second radiator 220, and the third radiator 230 can be used to generate a first resonance and a second resonance. In an embodiment of the present application, the first radiator 210, the second radiator 220, and the third radiator 230 all participate in the radiation mode of the antenna as radiators. In one embodiment, the electrical length of the first radiator 210 is one-quarter of the first wavelength. The sum of the electrical length of the third radiator 230 and the electrical length of the second radiator 220 between the connection point 241 and the ground end of the second radiator 220 is one-quarter of the first wavelength. The range of the first wavelength is from the wavelength corresponding to the resonance point frequency of the first resonance to the wavelength corresponding to the resonance point frequency of the second resonance.

[0230] It should be understood that the third radiator 230 and the first radiator 210 can form a structure similar to Figure 13 the antenna 200 shown, and the first resonance and the second resonance can be generated corresponding to the slot CM mode / line CM mode, so that the antenna 200 has good radiation characteristics (for example, radiation efficiency) in the resonance frequency bands of the first resonance and the second resonance.

[0231] Meanwhile, in the electronic device 10, compared with the first radiator 210 (where the conductive part in the frame 11 serves as the first radiator 210), the radiation environment of the third radiator 230 is relatively poor (for example, the clearance is poor and it is close to adjacent metal components). However, the inner conductor (the second radiator 220) can generate a new current path for the outer conductor (the first radiator 210) with a better radiation environment, thereby generating a new resonance (for example, the second resonance).

[0232] The second radiator 220 can also be used to generate a third resonance.

[0233] The first resonance and the second resonance are used to jointly support the first communication band of the electronic device 10, and the resonance bands of the first resonance and the second resonance include the first communication band. The third resonance is used to support the second communication band of the electronic device 10, and the resonance band of the third resonance includes the second communication band. The first communication band and the second communication band are different. Since the physical length L1 of the first radiator 210 and the sum L2 + L4 of the physical length L2 of the third radiator 230 and the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 satisfy: L1 ≤ L2 + L4 ≤ L1 × 150%, the electrical length corresponding to the radiator part of L1 and the electrical length corresponding to the radiator part of L2 + L4 are substantially the same, which can make the first resonance and the second resonance more balanced, and the radiator efficiency of the antenna 200 in the first communication band will not produce pits, having better radiation characteristics.

[0234] Among them, the first feeding circuit 231 is used to feed the radio frequency signal of the first communication band.

[0235] It should be understood that the operating band of the electronic device 10 can be understood as a frequency range including the bands in which the electronic device 10 can communicate. For example, the low band (LB) (698 MHz - 960 MHz), the middle band (MB) (1710 MHz - 2170 MHz), or the high band (HB) (2300 MHz - 2690 MHz) in the cellular network. Taking an operating band of the electronic device 10 as LB (698 MHz - 960 MHz) as an example, this operating band can include multiple communication bands belonging to this frequency range. For example, B5, B8, etc., which can be correspondingly understood in the embodiments of the present application.

[0236] Moreover, the fact that the first communication band and the second communication band are different can be understood as that the first communication band and the second communication band are not of the same frequency (excluding the same communication band). In one embodiment, the first communication band can be a communication band below 1 GHz, and the second communication band can be a communication band above 1.5 GHz. In one embodiment, the first communication band can include the low band (698 MHz - 960 MHz) and / or the L1 band, L2 band, or L5 band in GPS, and the second communication band can include the middle band (1710 MHz - 2170 MHz) and / or the high band (2300 MHz - 2690 MHz), and / or other bands, such as the 2.4G or 5G band in WiFi, the Bluetooth band, the N77, N78, N79, etc. in the 5G communication band.

[0237] It should be understood that for the technical solution provided in the embodiments of the present application, when an electrical signal is fed into the first feeding point 211, the first radiator 210, the second radiator 220, and the third radiator 230 can generate the above-mentioned first resonance and second resonance, enabling the antenna 200 to have a relatively wide operating bandwidth.

[0238] Moreover, while generating the third resonance, the second radiator 220 can also be used to increase the radiation aperture of the third radiator 230. Since the second end of the third radiator 230 is connected to the connection point 241 of the second radiator 220, when the third radiator 230 generates resonance, the current on the third radiator 230 can be transmitted from the connection point 241 to the ground end on the second radiator 220, extending the current path on the third radiator 230, thereby increasing the radiation aperture of the third radiator 230 and enhancing the radiation characteristics (such as radiation efficiency) of the antenna 200 in the resonance frequency bands of the first resonance and the second resonance.

[0239] In one embodiment, the first resonance and the second resonance can be close to each other so that the first resonance and the second resonance are used to jointly support the first communication frequency band of the electronic device 10. In one embodiment, the frequency difference between the first resonance and the second resonance is in the range of 5% to 20% (greater than or equal to 5% and less than or equal to 20%) of the low-frequency resonance frequency point or the high-frequency resonance frequency point. In one embodiment, in the low-frequency band (for example, 698 MHz - 960 MHz), 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 50 MHz and less than or equal to 160 MHz. In the middle-frequency band (for example, 1710 MHz - 2170 MHz), 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 120 MHz and less than or equal to 300 MHz. In the high-frequency band (for example, 2300 MHz - 2690 MHz), 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 160 MHz and less than or equal to 500 MHz.

[0240] In one embodiment, the ratio of the length of the overlapping portion of the third radiator 230 and the first radiator 210 in the first direction (the overlapping portion of the projection of the third radiator 230 on the frame 11 and the first radiator 210) to the length of the first radiator 210 is greater than or equal to 20%. In one embodiment, the ratio of the length of the overlapping portion to the length of the first radiator 210 is greater than or equal to 25%. In one embodiment, the ratio of the length of the overlapping portion to the length of the first radiator 210 is less than or equal to 75%.

[0241] It should be understood that when the above ratio is greater than or equal to 20%, the first radiator 210 can be better excited, and the antenna 200 has better radiation characteristics. When the first position 201 and the second position 202 are respectively located on the first side and the second side where the frame intersects at an angle, the extending direction of the first radiator 210 includes the extending direction of the first side (for example, the x direction) and the extending direction of the second side (for example, the y direction). The length of the overlapping part can be understood as the sum of the length of the overlapping part in the extending direction of the first side (for example, the x direction) and the length of the overlapping part in the extending direction of the second side (for example, the y direction).

[0242] In one embodiment, the distance D between the third radiator 230 and the first radiator 210 is less than or equal to 5 mm, so that there is good coupling characteristics between the third radiator 230 and the first radiator 210. In one embodiment, the distance D between the third radiator 230 and the first radiator 210 is less than or equal to 2 mm. In one embodiment, the distance D between the third radiator 230 and the first radiator 210 is greater than or equal to 0.5 mm.

[0243] It should be understood that the distance D between the third radiator 230 and the first radiator 210 can be understood as the spacing distance on the main spacing area between the third radiator 230 and the first radiator 210; wherein, the main spacing area can be understood as the area where 80% or 90% of the part of the first radiator 210 is spaced from the third radiator 230, and the spacing distance of this main spacing area can be understood as the closest distance in the main spacing area.

[0244] In one embodiment, the third radiator 230 is strip-shaped. "Strip-shaped" can be understood as the length is much greater than the width, for example, the length is more than three times or six times the width. In one embodiment, the smallest dimension among the three-dimensional dimensions of the third radiator 230 is the thickness. For example, in one embodiment, when the third radiator 230 can be arranged on the surface of the bracket, the dimension in the direction perpendicular to the surface of the bracket is the thickness. The dimensions of the third radiator 230 other than the thickness can be understood as the length and the width.

[0245] In one embodiment, the width of the third radiator 230 can be less than or equal to 3 mm. In one embodiment, the width of the third radiator 230 can be less than or equal to 2 mm.

[0246] In one embodiment, since the first end of the third radiator 230 is an open end. An electronic component can be coupled and connected between the first end of the third radiator 230 and the floor 300, and the physical size of the third radiator 230 is reduced without changing the electrical length, realizing miniaturization. For the sake of simplicity of discussion, in the embodiments of the present application, the open ends described can all adopt this method to realize the miniaturization of the radiator.

[0247] When the electronic component is located at the first end of the third radiator 230, the first end of the third radiator 230 and the floor 300 cannot be equivalently short-circuited. Therefore, the electronic component can be equivalent to a capacitor, and its equivalent capacitance value is less than the first threshold. When the frequency of the electrical signal fed by the first feeding circuit 231 is less than or equal to 1 GHz, the first threshold is 10 pF. When the frequency of the electrical signal fed by the first feeding circuit 231 is greater than 1 GHz and less than or equal to 2 GHz, the first threshold is 5 pF. When the frequency of the electrical signal fed by the first feeding circuit 231 is greater than 2 GHz and less than or equal to 3 GHz, the first threshold is 3 pF. When the frequency of the electrical signal fed by the first feeding circuit 231 is greater than 3 GHz, the first threshold is 2 pF.

[0248] In one embodiment, the antenna 200 further includes a second feeding circuit 232. The second radiator 220 includes a second feeding point 212, and the second feeding circuit 232 is coupled to the second feeding point 212. The second feeding circuit 232 can be used to excite the second radiator 220 to generate a third resonance. In one embodiment, the first feeding circuit 231 is used to feed a radio frequency signal in the first communication band. The second feeding circuit 232 is used to feed a radio frequency signal in the second communication band.

[0249] It should be understood that since the connection point 241 between the second end of the third radiator 230 and the second radiator 220 is connected, various feeding structures can all excite the antenna 200 to generate the first resonance, the second resonance, and the third resonance.

[0250] In one embodiment, the first feeding point 211 can be set at any position of the third radiator 230, and the second feeding point 212 can be set at any position of the second radiator 220. For example, when set on the side close to the open end (the distance between the feeding point and the end of the open end is less than half of the length of the radiator), the radiator can form a structure similar to a left-handed antenna, as shown in (a) of Figure 15 .

[0251] In one embodiment, both the first feeding point 211 and the second feeding point 212 can be set on the second radiator 220 or the third radiator 230. The first feeding point 211 and the second feeding point 212 can coincide (be the same), as shown in (b) and (c) of Figure 15 . When the first feeding point 211 and the second feeding point 212 coincide (are the same), the first feeding point 211 is used to feed radio frequency signals in the first communication band and the second communication band.

[0252] It should be understood that when the first feeding point 211 and the second feeding point 212 coincide (are the same), the connection positions provided on the radiator can be reduced, the complexity of the antenna 200 is reduced, and the structure is simpler.

[0253] In one embodiment, the antenna 200 may further include a filtering circuit 251, as shown in (b) of Figure 15 . The connection ports of the filtering circuit 251 are coupled to the first feeding point 211 (the second feeding point 212). The first port is electrically connected to the first feeding circuit 231, and the second port is electrically connected to the second feeding circuit 232. The filtering circuit 251 can be used to improve the isolation between the first feeding circuit 231 and the second feeding circuit 232. In one embodiment, the first feeding circuit 231 is used to feed a radio frequency signal in a first communication band. The second feeding circuit 232 is used to feed a radio frequency signal in a second communication band.

[0254] In one embodiment, the antenna 200 may further include a combiner 252, as shown in (c) of Figure 15 . The first port of the combiner 252 is coupled to the first feeding point 211 (the second feeding point 212). The combiner 252 can be used to combine the radio frequency signals fed by the first feeding circuit 231 and the second feeding circuit 232 into one radio frequency signal (this radio frequency signal includes the radio frequency signal in the first communication band and the radio frequency signal in the second communication band). The feeding method of feeding the combined electrical signal into the radiator can be understood as combined feeding, while the feeding method shown in the above embodiment can be understood as split feeding. The technical solutions provided in the embodiments of the present application can all be fed in the way of combined feeding or split feeding, and no limitation is made thereto.

[0255] In one embodiment, the frame 11 is coupled to the floor 300 at the third position 203. The first end of the second radiator 220 is an open end, and the second end is a grounded end, as shown in (a) of Figure 16 .

[0256] In one embodiment, the frame 11 opens a second insulating gap at the third position 203. The first end of the second radiator 220 is a grounded end, and the second end is an open end, as shown in (b) of Figure 16 .

[0257] In one embodiment, the frequency of the second communication band is higher than the frequency of the first communication band. One end of the second radiator 220 is a grounded end and the other end is an open end.

[0258] In one embodiment, the frame 11 opens a second insulating gap at the third position 203. The first end and the second end of the second radiator 220 are open ends, as shown in (c) of Figure 16 . In one embodiment, the second radiator 220 may further include a grounding point, and the second radiator 220 is coupled to the floor 30 at the grounding point.

[0259] In one embodiment, one end of the second radiator 220 is a grounded end and the other end is an open end.

[0260] In one embodiment, the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 is greater than zero and less than or equal to one-third of the length L3 of the second radiator 220, as shown in Figure 16 (a) in. When the second radiator 220 generates resonance, this region (the distance from the ground end is less than or equal to one-third of the length L3 of the second radiator 220) has a strong current. Since the connection point 241 is within the above region, when the third radiator 230 generates resonance, the current transmitted from the third radiator 230 to the second radiator 220 will not have a great impact on the third resonance (for example, the offset of the resonance point frequency of the third resonance is less than 50 MHz), and a relatively wide resonance frequency band can be obtained for the third resonance. In one embodiment, since the third resonance has a relatively wide resonance frequency band, the second communication band can have a relatively wide bandwidth and can include relatively wide communication bands in a cellular network. For example, the mid-frequency band (1710 MHz - 2170 MHz) and / or the high-frequency band (2300 MHz - 2690 MHz), and / or N77, N78, N79 in a 5G communication system. In one embodiment, the first communication band can have a relatively narrow bandwidth and can include relatively narrow communication bands, such as some bands in a non-cellular network, the L1 band, the L2 band, or the L5 band in GPS.

[0261] It should be understood that the radiator length L4 between the connection point 241 and the ground end can be understood as the length of the second radiator 220 between the midpoint of the end face where the third radiator 230 is connected to the second radiator 220 and the connection position of the midpoint with the ground end of the second radiator 220 (for example, connected by a metal shrapnel to the floor, and the connection position is the connection position of the metal shrapnel with the second radiator 220) for the sake of simplicity of discussion.

[0262] In one embodiment, the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 is greater than or equal to two-thirds of the length L3 of the second radiator 220, as shown in Figure 16As shown in (b) of []. When the connection point 241 is within the above-mentioned region (the distance from the ground terminal is greater than two-thirds of the length L3 of the second radiator 220, and the distance from the open end is greater than two-thirds of the length L3 of the second radiator 220), when the third radiator 230 generates resonance, the current path extension increases, which can further increase the radiation aperture of the third radiator 230 and improve the radiation characteristics (e.g., radiation efficiency) of the antenna 200 in the first communication band. However, when the second radiator 220 generates resonance, there is not a strong current in this region, and the current transmitted from the second radiator 220 to the third radiator 230 will have a greater impact on the third resonance (e.g., the frequency offset of the resonance point of the third resonance is greater than 50 MHz), which can make the third resonance have a narrower resonance frequency band. In one embodiment, due to the narrower resonance frequency band of the third resonance, the second communication band can have a narrower bandwidth and can include a narrower communication frequency band, e.g., some frequency bands in non-cellular networks, the 2.4G or 5G frequency bands in WiFi, and the Bluetooth frequency band. In one embodiment, the first communication band can have a wider bandwidth and can include a wider communication frequency band in cellular networks, e.g., the low-frequency band (698 MHz - 960 MHz).

[0263] In one embodiment, the radiator length L4 between the connection point 241 and the ground terminal of the second radiator 220 is greater than or equal to one-fifth of the length L3 of the second radiator 220 and less than or equal to four-fifths of the length L3 of the second radiator 220.

[0264] It should be understood that the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 affects the communication performance of the antenna in the first communication band and the second communication band. When the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 is greater than zero and less than or equal to one-third of the length L3 of the second radiator 220, it is more beneficial to the communication performance in the second communication band, and the first communication band can be selected as a band with a relatively narrow operating bandwidth. As the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 increases, the influence on the communication performance in the second communication band becomes greater, and it is more beneficial to the communication performance in the second communication band. Therefore, in actual production or design, it can be adjusted according to different usage scenarios. It should be understood that the radiator length L4 between the connection point 241 and the ground end of the second radiator 220 can be between zero and the length L3 of the second radiator 220. No matter where the connection point 241 is specifically set in the second radiator 220, the first resonance and the second resonance can be generated through the first radiator 210, the second radiator 220, and the third radiator 230, so that the first resonance and the second resonance are used to jointly support the first communication band; and the third resonance is generated through the second radiator 220 to support the second communication band. In the above embodiments, only two communication bands including some bands in the cellular network and some bands in the non-cellular network are taken as examples for illustration. Similarly, when both of the two communication bands include some bands in the cellular network or some bands in the non-cellular network, it can also be correspondingly understood that the position of the connection point 241 is determined according to the operating bandwidths required by the first communication band and the second communication band, and the embodiments of the present application do not limit this.

[0265] In one embodiment, one end of the second radiator 220 is a ground end and the other end is an open end. The length L3 of the second radiator 220 is less than the length L1 of the first radiator 210. In one embodiment, the length L3 of the second radiator 220 is less than the length L2 of the third radiator 230. In one embodiment, the length L1 of the first radiator 210 and / or the length L2 of the third radiator 230 is greater than or equal to three-halves of the length L3 of the second radiator 220.

[0266] In one embodiment, the resonance point frequency of the third resonance is greater than the resonance point frequency of the first resonance and greater than the resonance point frequency of the second resonance (the frequency of the first communication band is less than the frequency of the second communication band). The resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is less than or equal to two-thirds of the resonance point frequency of the third resonance.

[0267] In one embodiment, both ends of the second radiator 220 are open ends, as shown in (c) of Figure 16 .

[0268] Similarly, when the second radiator 220 generates resonance, the region (the distance from the ground connection point of the second radiator 220 is less than or equal to one-sixth of the length L3 of the second radiator 220) has a strong current. The connection point 241 is within the above region. When the third radiator 230 generates resonance, the current transmitted from the third radiator 230 to the second radiator 220 will not have a great impact on the third resonance (for example, the offset of the resonance point frequency of the third resonance is less than 50 MHz).

[0269] Similarly, the connection point 241 is within the above region (the distance from the ground connection point of the second radiator 220 is greater than one-sixth of the length L3 of the second radiator 220). When the third radiator 230 generates resonance, the current path extends and increases, which can further increase the radiation aperture of the third radiator 230 and improve the radiation characteristics (such as radiation efficiency) of the antenna 200 in the first communication band. However, when the second radiator 220 generates resonance, this region does not have a strong current, and the current transmitted from the second radiator 220 to the third radiator 230 will have a great impact on the third resonance (for example, the offset of the resonance point frequency of the third resonance is greater than 50 MHz).

[0270] In one embodiment, the electronic device includes a middle frame 19, and the middle frame includes the above-mentioned frame 11 and a middle plate 301, as Figure 17 shown. In one embodiment, the middle plate 301 is electrically connected to the ground plane 300 at multiple points. In one embodiment, the middle plate 301 can be regarded as a part of the ground plane 300.

[0271] In one embodiment, the frame 11 is electrically connected to the middle plate 301 through a connecting rib structure (such as a grounding connector), and the frame 11 can be coupled to the ground plane 300 through the connecting rib structure (such as a grounding connector).

[0272] Among them, 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.

[0273] In one embodiment, the third radiator 230 and the second radiator 220 (frame 11) are integrally formed. In one embodiment, the third radiator 230, the frame 11, and the middle plate 301 are integrally formed.

[0274] It should be understood that the third radiator 230, the frame 11, and the middle plate 301 can be milled from the same metal part, so as to reduce the error during assembly and improve the radiation characteristics (such as bandwidth) of the antenna 200.

[0275] In one embodiment, the electronic device may further include a battery 302. The middle frame 301 further includes a battery compartment 303 which 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 third radiator 230 is located between the battery 302 and the frame 11.

[0276] In one embodiment, the third radiator 230 and the floor 300 at least partially overlap in a second direction (e.g., the z direction).

[0277] In one embodiment, the distance between the first radiator 210 and / or the second radiator 220 and the floor 300 is less than or equal to 1.5 mm. In one embodiment, the distance between the first radiator 210 and / or the second radiator 220 and the floor 300 is less than or equal to 1 mm.

[0278] It should be understood that the distance between the radiator and the floor 300 can be understood as the minimum distance between the radiator and the metal part (coupled with the floor 300 and equivalent to the floor 300) with a close distance. For the antenna 200 provided in the embodiments of the present application, when the radiator is close to the floor 300 (metal part) (with a small clearance), it can still have good radiation characteristics. For example, in the operating frequency band (the first communication frequency band), the radiation efficiency is greater than or equal to -3 dB.

[0279] Figure 18 and Figure 19 is Figure 14 The simulation results of the antenna 200 in the electronic device 10 shown. Among them, Figure 18 is Figure 14 The simulation results of the S parameters of the antenna 200 shown. Figure 19 is Figure 14 The simulation results of the radiation efficiency and system efficiency of the antenna 200 shown.

[0280] It should be understood that in the Figure 18 and Figure 19 shown simulation results, a comparison antenna is set. The difference between the comparison antenna and the Figure 14 shown antenna 200 is only that the second radiator is not set, and the comparison antenna only includes the first radiator and the third radiator arranged at intervals.

[0281] As Figure 18 shown, when the first feeding circuit feeds in a signal, both the comparison antenna and the Figure 14 shown antenna 200 can generate resonances around 0.875 GHz and around 0.975 GHz, which can correspond to the first resonance and the second resonance in the above embodiments.

[0282] As Figure 19 shown, since in the Figure 14In the antenna 200 shown, the second radiator can be used to extend the current path on the third radiator, thereby increasing the radiation aperture of the third radiator. Therefore, compared with the comparative antenna, Figure 14 the antenna 200 shown has better radiation efficiency and system efficiency. Near 0.8 GHz, the radiation efficiency is increased by about 1 dB.

[0283] Figure 20 and Figure 21 are Figure 14 schematic diagrams of the current distribution of the antenna 200 in the electronic device 10 shown. Among them, Figure 20 is Figure 14 a schematic diagram of the current distribution of the antenna 200 shown at the resonance point of the first resonance (for example, 0.85 GHz). Figure 21 is Figure 14 a schematic diagram of the current distribution of the antenna 200 shown at the resonance point of the second resonance (for example, 0.96 GHz).

[0284] As Figure 20 shown, at the resonance point of the first resonance, the currents on the first radiator 210 are in the same direction, and the currents on the third radiator 230 are in the same direction. The current on the third radiator 230 extends to the second radiator 220.

[0285] As Figure 21 shown, at the resonance point of the second resonance, the currents on the first radiator 210 are in the same direction, and the currents on the third radiator 230 are in the same direction. The current on the third radiator 230 extends to the second radiator 220.

[0286] Figure 22 is a schematic diagram of another electronic device 10 provided in an embodiment of the present application.

[0287] As Figure 22 shown, the first feeding electrode 211 can be located on the second radiator 220 and is used to feed an electrical signal (for example, a radio frequency signal of the first communication band and a radio frequency signal of the second communication band) into the antenna 200.

[0288] In one embodiment, the antenna 200 may further include a second feeding circuit 232 and a filtering circuit 251. The connection port of the filtering circuit 251 is coupled to the first feeding point 211, the first port is electrically connected to the first feeding circuit 231, and the second port is electrically connected to the second feeding circuit 232.

[0289] It should be understood that the filtering circuit 251 can be used to improve the isolation degree between the first feeding circuit 231 and the second feeding circuit 232. At the same time, the filtering circuit 251 can also be used to provide different current paths to achieve the function of a matching circuit. Additional resonances can be generated by different current paths, thereby expanding the bandwidth of the antenna 200.

[0290] It should be understood that Figure 22 the shown antenna 200 and Figure 14 the shown antenna 200 only differ in the position where the feeding point is set.

[0291] In one embodiment, the electronic device 10 may further include a parasitic stub 260.

[0292] Among them, the first end of the parasitic stub 260 is connected to the connection point 242 of the second radiator 220. The parasitic stub 260 can be used to generate a fourth resonance to expand the bandwidth of the antenna 200.

[0293] It should be understood that Figure 23 the shown antenna 200 and Figure 14 the shown antenna 200 only differ in the parasitic stub 260, and an additional resonance can be generated through the parasitic stub 260.

[0294] In one embodiment, the length of the parasitic stub 260 is less than the length of the first radiator 210. In one embodiment, the length of the parasitic stub 260 is less than the length of the second radiator 220.

[0295] In one embodiment, the resonance point frequency of the fourth resonance is greater than the resonance point frequency of the first resonance, greater than the resonance point frequency of the second resonance, and greater than the resonance point frequency of the third resonance.

[0296] In one embodiment, the connection point 242 coincides (is the same) with the first feeding point 211. The first feeding circuit 231 is coupled to the parasitic stub 260.

[0297] It should be understood that when the connection point 242 coincides (is the same) with the first feeding point 211, the connection positions provided on the radiator can be reduced, the complexity of the antenna 200 is reduced, and the structure is simpler.

[0298] In one embodiment, a part of the circuit in the filtering circuit 251 can also be used as a tuning circuit for switching the resonance point frequencies of the first resonance, the second resonance, or the third resonance, and the fourth resonance. In one embodiment, the filtering circuit 251 may include variable devices (variable capacitors, variable inductors, etc.) or switches, which can be used to switch the equivalent capacitance value or equivalent inductance value of the electronic components coupled to the connection point 222.

[0299] In one embodiment, the parasitic stub 260 and the second radiator 220 (the frame 11) are integrally formed. In one embodiment, the parasitic stub 260, the frame 11, and the middle plate are integrally formed.

[0300] It should be understood that the parasitic stub 260, the frame 11, and the middle plate can be milled from the same metal part, thereby reducing the error during assembly and improving the radiation characteristics (e.g., bandwidth) of the antenna 200.

[0301] For the sake of brevity in discussion, Figure 23 the parts of the illustrated antenna 200 that are similar to Figure 14 the illustrated antenna 200 will not be described in detail one by one. For example, the positions of the first radiator 210, the second radiator 220, and the third radiator 230, and the relationships among them; the first radiator 210, the second radiator 220, and the third radiator 230 are used to generate the first resonance and the second resonance to jointly support the first communication band; the second radiator 220 is used to generate the third resonance to support the second communication band; the position of the connection point 241, etc.

[0302] Figures 24 to 27 is Figure 23 the simulation result of the antenna 200 in the electronic device 10 shown. Among them, Figure 24 is Figure 23 the simulation result of the S-parameters of the illustrated antenna 200 when an electrical signal is fed into the first feeding unit. Figure 25 is Figure 23 the simulation result of the radiation efficiency and system efficiency of the illustrated antenna 200 when an electrical signal is fed into the first feeding unit. Figure 26 is Figure 23 the simulation result of the S-parameters of the illustrated antenna 200 when an electrical signal is fed into the second feeding unit. Figure 27 is Figure 23 the simulation result of the radiation efficiency and system efficiency of the illustrated antenna 200 when an electrical signal is fed into the second feeding unit.

[0303] As Figure 24 shown, when the first feeding circuit feeds in a signal, Figure 23 the illustrated antenna 200 can generate resonances near 0.73 GHz, near 0.92 GHz, and near 0.99 GHz, which can correspond to the first resonance, the second resonance, and the resonances generated by different current paths provided by the filtering circuit in the above embodiments.

[0304] As Figure 25 shown, since in Figure 23 the illustrated antenna 200, the second radiator can be used to extend the current path on the third radiator, thereby increasing the radiation aperture of the third radiator, Figure 23 the illustrated antenna 200 has good radiation efficiency and system efficiency in the resonance frequency band (with S11 less than -2 dB as the boundary).

[0305] As Figure 26 shown, when the second feeding circuit feeds in a signal, Figure 23The antenna 200 shown can generate multiple resonances between 2 GHz and 6.5 GHz. Among them, the resonance generated near 2.4 GHz can correspond to the third resonance in the above embodiments, and the resonance generated near 5.3 GHz can correspond to the fourth resonance in the above embodiments. Taking S11 less than -2 dB as the boundary, the resonance frequency band can include the 2.4G band of WiFi and the 5G band of WiFi.

[0306] As Figure 27 shown, Figure 23 The antenna 200 shown has good radiation efficiency and system efficiency in the resonance frequency band (taking S11 less than -2 dB as the boundary).

[0307] Figure 28 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0308] As Figure 28 shown, the first feeding electrode 211 can be located on the second radiator 220 and is used to feed an electrical signal into the antenna 200 (for example, a radio frequency signal of the first communication frequency band and a radio frequency signal of the second communication frequency band).

[0309] In one embodiment, the electronic device 10 may further include a parasitic stub 260.

[0310] Among them, the first end of the parasitic stub 260 is connected to the connection point 242 of the first radiator 210. The parasitic stub 260 can be used to generate a fourth resonance to expand the bandwidth of the antenna 200.

[0311] It should be understood that Figure 28 the antenna 200 shown and Figure 23 the difference between the antenna 200 shown is only that the position of the parasitic stub 260 is different. In Figure 23 the antenna 200 shown, the connection point 242 is located on the second radiator 220, and the feeding point coincides with the connection point 242. While in Figure 28 the antenna 200 shown, the connection point 242 is located on the first radiator 210, and the same technical effect can also be achieved.

[0312] For the sake of simplicity of discussion, Figure 28 the parts of the antenna 200 shown and Figure 23 the antenna 200 shown that are similar will not be described in detail one by one. For example, the positions of the first radiator 210, the second radiator 220, and the third radiator 230, and the relationships between them; the first radiator 210, the second radiator 220, and the third radiator 230 are used to generate the first resonance and the second resonance to jointly support the first communication frequency band; the second radiator 220 is used to generate the third resonance to support the second communication frequency band; the position of the connection point 241; the length of the parasitic stub 260, etc.

[0313] Figure 29 It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0314] It should be understood that in the above embodiments, it is exemplified that the resonance point frequency of the third resonance is greater than the resonance point frequency of the first resonance and greater than the resonance point frequency of the second resonance (the frequency of the first communication band is less than the frequency of the second communication band). In actual production or design, the resonance point frequency of the third resonance may also be less than the resonance point frequency of the first resonance and less than the resonance point frequency of the second resonance (the frequency of the first communication band is greater than the frequency of the second communication band).

[0315] As Figure 29 shown, the length L3 of the second radiator 220 is greater than the length L1 of the first radiator 210. In one embodiment, the length L3 of the second radiator 220 is greater than the length L2 of the third radiator 230.

[0316] In one embodiment, the first communication band may be a communication band above 1.5 GHz, and the second communication band may be a communication band below 1 GHz.

[0317] In one embodiment, one end of the second radiator 220 is a ground end and one end is an open end. In one embodiment, the length L1 of the first radiator 210 and / or the length L2 of the third radiator 230 is less than or equal to two-thirds of the length L3 of the second radiator 220.

[0318] In one embodiment, the resonance point frequency of the third resonance is less than the resonance point frequency of the first resonance and less than the resonance point frequency of the second resonance (the frequency of the first communication band is less than the frequency of the second communication band). The resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is greater than or equal to three-halves of the resonance point frequency of the third resonance.

[0319] It should be understood that Figure 29 the difference between the antenna 200 shown and the antenna 200 shown in the above embodiment is only that the frequency of the third resonance is different. For the sake of brevity of discussion, Figure 29 the parts of the antenna 200 shown that are similar to the antenna 200 shown in the above embodiment will not be described one by one. For example, the positions of the first radiator 210, the second radiator 220, and the third radiator 230; the first radiator 210 and the second radiator are used to generate the first resonance and the second resonance to jointly support the first communication band; the second radiator 220 is used to generate the third resonance to support the second communication band; the position of the connection point 241, etc.

[0320] In one embodiment, the resonant frequency of the third resonance is less than the resonant frequency of the first resonance and less than the resonant frequency of the second resonance (the frequency of the first communication band is greater than the frequency of the second communication band). The radiator length L4 between the connection point 241 and the ground end of the second radiator 220 is greater than zero and less than or equal to one-third of the length L3 of the second radiator 220. Since when the second radiator 220 generates resonance, this region (the distance from the ground end is less than or equal to one-third of the length L3 of the second radiator 220) has a strong current, and the connection point 241 is within the above region, when the third radiator 230 generates resonance, the current transmitted from the third radiator 230 to the second radiator 220 will not have a great impact on the third resonance (for example, the offset of the resonant frequency of the third resonance is less than 50 MHz). In one embodiment, since the impact on the third resonance is small, the second communication band may include communication bands in a cellular network, for example, a low-frequency band (698 MHz - 960 MHz). In one embodiment, the first communication band may include communication bands of a non-cellular network, for example, the 2.4G or 5G band in WiFi, and the Bluetooth band.

[0321] In one embodiment, the resonant frequency of the third resonance may also be less than the resonant frequency of the first resonance and less than the resonant frequency of the second resonance (the frequency of the first communication band is greater than the frequency of the second communication band). The radiator length L4 between the connection point 241 and the ground end of the second radiator 220 is greater than or equal to two-thirds of the length L3 of the second radiator 220. The connection point 241 is within the above region (the distance from the ground end is greater than two-thirds of the length L3 of the second radiator 220, and the distance from the open end is greater than two-thirds of the length L3 of the second radiator 220). When the third radiator 230 generates resonance, the current path extends and increases, which can further increase the radiation aperture of the third radiator 230 and improve the radiation characteristics (such as radiation efficiency) of the antenna 200 in the first communication band. However, since when the second radiator 220 generates resonance, this region does not have a strong current, the current transmitted from the second radiator 220 to the third radiator 230 will have a great impact on the third resonance (for example, the offset of the resonant frequency of the third resonance is greater than 50 MHz). In one embodiment, since the impact on the third resonance is large, the second communication band may include communication bands of a non-cellular network, for example, the L1 band, L2 band, or L5 band in GPS. In one embodiment, the first communication band may include communication bands in a cellular network, for example, the mid-frequency band (1710 MHz - 2170 MHz) and / or the high-frequency band (2300 MHz - 2690 MHz), and / or N77, N78, N79 in a 5G communication system.

[0322] Figure 30It is a schematic diagram of another electronic device 10 provided by an embodiment of the present application.

[0323] As Figure 30 shown, the first end of the third radiator 230 extends towards the first radiator 210, and the second end of the third radiator 230 extends towards the second radiator 220.

[0324] Part of the first radiator 210 and the third radiator 230 are spaced apart, and the first radiator 210 and the third radiator 230 overlap at least partially in a first direction, which is perpendicular to the extending direction of the first radiator 210 (e.g., the y direction).

[0325] Part of the second radiator 220 and the third radiator 230 are spaced apart, and the second radiator 220 and the third radiator 230 overlap at least partially in a third direction, which is perpendicular to the extending direction of the second radiator 220 (e.g., the y direction).

[0326] The first end of the third radiator 230 is an open end, and the second end is a grounded end.

[0327] It should be understood that Figure 30 the difference between the antenna 200 shown and the antenna 200 shown in the above embodiment lies only in the connection manner of the second end of the third radiator 230 and the second radiator 220. In the above embodiment, the connection point 241 of the second end of the third radiator 230 and the second radiator 220 (the second end of the third radiator 230 is directly electrically connected to the second radiator 220) is taken as an example for illustration. However, in the Figure 30 antenna 200 shown, the second end of the third radiator 230 can be spaced apart from the second radiator 220 (the second end of the third radiator 230 is indirectly coupled to the second radiator 220), and the same technical effect can also be achieved.

[0328] For the sake of simplicity of discussion, Figure 30 the parts of the antenna 200 shown that are similar to the antenna 200 shown in the above embodiment will not be described in detail one by one. For example, the positions of the first radiator 210, the second radiator 220, and the third radiator 230, and the relationships between them; the first radiator 210 and the second radiator 220, the third radiator 230 are used to generate a first resonance and a second resonance to jointly support a first communication band; the second radiator 220 is used to generate a third resonance to support a second communication band, etc.

[0329] The above is only the specific implementation manner 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 by 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 should be subject to the protection scope of the claimed rights.

Claims

1. An electronic device, characterized in that, Comprising: Floor; Frame, the frame is at least partially spaced from the floor, the first frame includes a first position, a second position and a third position arranged in sequence, the frame is coupled to the floor at the first position, the frame has a first insulating gap at the second position, the first ends of the first radiator and the second radiator face each other through the first insulating gap and do not contact each other, the frame is coupled to the floor at the third position or has a second insulating gap at the third position; Antenna, the antenna includes: First radiator, 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; Third radiator, the first end of the third radiator extends towards the first radiator, the second end of the third radiator is connected to the connection point of the second radiator, the first end of the third radiator is an open end, the first radiator and the third radiator are spaced apart and at least partially overlap in a first direction, the first direction is a direction perpendicular to the extending direction of the first radiator, and the third radiator is arranged inside the frame; First feeding circuit, the second radiator or the third radiator includes a feeding point, and the first feeding circuit is coupled to the feeding point; Wherein, the physical length L1 of the first radiator, the physical length L2 of the third radiator, and the radiator length L4 between the connection point and the grounding end of the second radiator satisfy: L1×50%≤L2+L4≤L1, the first radiator, the second radiator and the third radiator are 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 communication band of the electronic device; The second radiator is further used to generate a third resonance, and the resonance frequency band of the third resonance includes a second communication band, and the first communication band is different from the second communication band.

2. The electronic device according to claim 1, characterized in that, The frame is coupled to the floor at the third position, the first end of the second radiator is an open end, and the second end of the second radiator is a grounding end.

3. The electronic device according to claim 1, characterized in that, The frame has the second insulating gap at the third position, the first end of the second radiator is a grounding end, and the second end of the second radiator is an open end.

4. The electronic device according to claim 2 or 3, characterized in that, The length of the second radiator is less than the length of the first radiator; The resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is less than or equal to two-thirds of the resonance point frequency of the third resonance.

5. The electronic device according to claim 4, characterized in that, The length of the first radiator is greater than or equal to three-halves of the length of the second radiator.

6. The electronic device according to claim 2 or 3, characterized in that, The length of the second radiator is greater than the length of the first radiator; The resonance point frequency of the first resonance and / or the resonance point frequency of the second resonance is greater than or equal to two-thirds of the resonance point frequency of the third resonance.

7. The electronic device according to claim 6, characterized in that, The length of the first radiator and / or the third radiator is less than or equal to two-thirds of the length of the second radiator.

8. The electronic device according to any one of claims 1 to 7, characterized in that, The radiator length L4 between the connection point and the ground end of the second radiator is greater than zero and less than or equal to one-third of the length of the second radiator.

9. The electronic device according to claim 8, characterized in that, The second communication band includes at least part of the bands in the cellular network.

10. The electronic device according to any one of claims 1 to 7, characterized in that, The radiator length L4 between the connection point and the ground end of the second radiator is greater than two-thirds of the length of the second radiator.

11. The electronic device according to claim 9, characterized in that, The second communication band includes the 2.4G and 5G bands in WiFi, and / or the Bluetooth band.

12. The electronic device according to any one of claims 1 to 11, characterized in that, The antenna further includes a second feeding circuit and a filtering circuit; The connection port of the filtering circuit is coupled to the feeding point, the first port of the filtering circuit is coupled to the first feeding circuit, and the second port of the filtering circuit is coupled to the second feeding circuit.

13. The electronic device according to any one of claims 1 to 12, characterized in that, At the resonance point of the first resonance, the currents on the first radiator are in the same direction; At the resonance point of the second resonance, the currents on the first radiator are in the same direction.

14. The electronic device according to any one of claims 1 to 13, characterized in that, At the resonance point of the first resonance, the currents on the third radiator are in the same direction; At the resonance point of the second resonance, the currents on the third radiator are in the same direction.

15. The electronic device according to any one of claims 1 to 14, characterized in that, The distance D between the first radiator and the third radiator is greater than or equal to 0.5 mm and less than or equal to 5 mm.

16. The electronic device according to any one of claims 1 to 15, characterized in that, The ratio of the length of the overlapping part of the third radiator and the first radiator in the first direction to the length of the first radiator is greater than or equal to 25% and less than or equal to 75%.

17. The electronic device according to any one of claims 1 to 16, characterized in that, The third radiator at least partially overlaps with the floor in the first direction, and the second direction is the thickness direction of the electronic device.

18. The electronic device according to any one of claims 1 to 17, 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 part of the floor; Wherein, the third radiator is located between the battery compartment and the frame.

19. The electronic device according to any one of claims 1 to 18, characterized in that, The distance between the floor and the radiator is less than or equal to 1.5 mm.

20. The electronic device according to any one of claims 1 to 19, characterized in that, The third radiator and the second radiator are integrally formed.

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