Electronic device

Abstract

Provided in the present application is an electronic device. The electronic device comprises an antenna, the antenna comprising a radiator, a first capacitor, a first feed circuit, and a second feed circuit. In the antenna, the first feed circuit and the second feed circuit respectively form a first sub-antenna and a second sub-antenna. The first sub-antenna and the second sub-antenna multiplex the radiator, such that the electronic device can accommodate more antennas within a relatively small layout space, thereby increasing the data transmission rate of the electronic device. In addition, the first capacitor is coupled and connected between a second feed point and the second feed circuit, and a second end of the first capacitor is coupled to the ground, such that the first capacitor can enhance the isolation between the first sub-antenna and the second sub-antenna in a first frequency band, enabling both the first sub-antenna and the second sub-antenna to exhibit good radiation characteristics in the first frequency band.

Description

An electronic device

[0001] This application claims priority to Chinese patent application No. 202410964616.4, filed on July 17, 2024, entitled "An Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of wireless communication, and more particularly to an electronic device. Background Technology

[0003] With the rapid development of wireless communication technology and the ever-increasing demands for transmission speed, sub-6GHz multi-input multi-output (MIMO) antenna systems have been rapidly developed. Sub-6GHz MIMO antenna systems can deploy a large number of antennas at both the base station and the terminal, enabling simultaneous data transmission across multiple channels in both the time and frequency domains. This effectively improves spectral efficiency and significantly increases data transmission speed. Therefore, it has become one of the key development areas for communication systems.

[0004] However, as the layout of electronic devices becomes increasingly compact, when several antennas operating on the same frequency band are designed together in a terminal device with limited space, the interference between the antennas becomes increasingly large due to the close proximity between them, resulting in poor isolation between the antennas and causing inconvenience to users. Summary of the Invention

[0005] This application provides an electronic device including an antenna. The antenna is formed by a first feeding circuit and a second feeding circuit, respectively, and the first sub-antenna and the second sub-antenna have good isolation.

[0006] In a first aspect, an electronic device is provided, comprising: a floor; an antenna, the antenna comprising: a radiator, a first end and a second end of the radiator being open ends, at least a portion of the radiator being spaced apart from the floor, the radiator comprising a first feed point and a second feed point, the distance L1 between the first feed point and the center of the radiator satisfying: 0.125×L0≤L1≤0.375×L0, the distance L2 between the second feed point and the center of the radiator satisfying: 0.125×L0≤L2≤0.375×L0, where L0 is the length of the radiator, and the lengths of the radiators on both sides of the center of the radiator are the same. The system includes a power supply circuit, a first power supply circuit coupled to a first power supply point, a first capacitor and a second power supply circuit, and a radiator further including a second power supply point. A first end of the first capacitor is coupled to the second power supply point, a second end of the first capacitor is coupled to the second power supply circuit, and a second end of the first capacitor is coupled to the ground plane. The radiator and the first power supply circuit are used to generate a first resonance and a second resonance, the resonant frequency of the first resonance being lower than the resonant frequency of the second resonance. The radiator and the second power supply circuit are used to generate a third resonance, the resonant frequency band of both the second and third resonances including a first frequency band.

[0007] According to embodiments of this application, a first feed circuit and a radiator can form a first sub-antenna, and a second feed circuit and a radiator can form a second sub-antenna. The first and second sub-antennas share the same radiator, allowing the electronic device to have more antennas within a smaller layout space, thereby increasing the data transmission rate of the electronic device.

[0008] Meanwhile, since the first capacitor is coupled between the second feed point and the second feed circuit, and the second end of the first capacitor is coupled to the ground, the first capacitor can improve the isolation between the first sub-antenna and the second sub-antenna in the first frequency band, so that both the first sub-antenna and the second sub-antenna have good radiation characteristics in the first frequency band.

[0009] Furthermore, the first sub-antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance may include a second frequency band. The second frequency band may include other communication frequency bands, thereby expanding the operating frequency band of the first sub-antenna and enabling the antenna to operate in more communication frequency bands.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the distance D between the first feed point and the second feed point satisfies: D≤0.25×L0.

[0011] According to an embodiment of this application, the first feed point and the second feed point can be located on the same side of the center of the radiator. Since the first feed point and the second feed point are located on the same side of the center of the radiator, the first region has a strong current when the radiator generates the second resonance and the third resonance. Because the first region has a strong current during both the second and third resonances, the electric fields generated by the radiator during the second and third resonances have more orthogonal components, resulting in better isolation between the first sub-antenna and the second sub-antenna in the first frequency band.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the distance D between the first feed point and the second feed point satisfies: 1mm≤D≤5mm.

[0013] According to the embodiments of this application, as the first feed point and the second feed point get closer, when the radiator generates the second resonance and the third resonance, the current in the first region is stronger, and there are more orthogonal components between the electric fields generated by the second resonance and the third resonance of the radiator. The first sub-antenna and the second sub-antenna have better isolation in the first frequency band.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the equivalent capacitance of the first capacitor is greater than or equal to 0.1pF and less than or equal to 3pF.

[0015] According to an embodiment of this application, the first capacitor can be used to prevent the radiator from generating a resonance similar to the first resonance when an electrical signal is fed into the second feeding circuit (at the same time, it can also suppress the current transmission to the second feeding circuit when the radiator generates the first resonance). Therefore, the equivalent capacitance value of the first capacitor can be determined based on the resonant frequency of the first resonance.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the antenna further includes a feeding element, the feeding element and the second feeding point being opposite to each other and not in contact, the feeding element being coupled to the second feeding circuit, and the equivalent capacitance formed between the feeding element and the radiator serving as the first capacitance.

[0017] According to the embodiments of this application, the first capacitor can be a lumped element or a distributed element.

[0018] In conjunction with the first aspect, in some implementations of the first aspect, at the resonant point of the second resonance, the current of the radiator in the first region is in the same direction, the first region including the second feed point, and / or, at the resonant point of the third resonance, the current of the radiator in the first region is in the opposite direction.

[0019] According to an embodiment of this application, when both ends of the radiator are open, an electrical signal is fed into the first feeding circuit. Since the distance L2 between the second feeding point and the center of the radiator satisfies the aforementioned proportional relationship, the second resonance can be generated by a wavelength-limited mode of the radiator, and the currents on the radiator are opposite on both sides of the center. Correspondingly, at the resonance point of the second resonance, the currents on the radiator are in the same direction in the first region.

[0020] When both ends of the radiator are open, and an electrical signal is fed into the second feed circuit, the third resonance can be generated by a mode similar to one wavelength of the radiator. Because the second end of the first capacitor is coupled to the ground plane, when an electrical signal is fed into the second feed circuit, the current on the radiator reverses on both sides of the second feed point. Correspondingly, at the resonant point of the third resonance, the current on the radiator reverses in the first region.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, at the resonant point of the second resonance, the electric field generated by the radiator is first polarized in a first region, the first region including the second feed point, and / or, at the resonant point of the third resonance, the electric field generated by the radiator is second polarized in the first region, the first polarization and the second polarization being orthogonal.

[0022] According to an embodiment of this application, at the resonant point of the second resonance, the current on the radiator is in the same direction in the first region, and this current distribution can generate a first polarized electric field. At the resonant point of the third resonance, the current on the radiator is in the opposite direction in the first region, and this current distribution can generate a second polarized electric field. Since the first region includes the second feed point, when the radiator generates the third resonance, the first region has a strong current, and the electric fields generated by the second resonance and the third resonance in the first region are orthogonally polarized. Therefore, the first sub-antenna and the second sub-antenna have good isolation in the first frequency band.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the resonant point f1 of the first resonance and the resonant point f2 of the second resonance satisfy: 1.5×f1≤f2≤2.5×f1.

[0024] According to the embodiments of this application, in actual production or design, the radiation characteristics of the first sub-antenna in the resonant frequency band of the first resonance and the resonant frequency band of the second resonance can also be adjusted in other ways, such as setting elements on the radiator, coupling the tuning circuit with the radiator, etc., which will not be described in detail here.

[0025] In conjunction with the first aspect, in some implementations of the first aspect, the antenna further includes a second capacitor and a third feeding circuit, the radiator further includes a third feeding point, a first end of the second capacitor is coupled to the third feeding point, a second end of the second capacitor is coupled to the third feeding circuit, and a second end of the second capacitor is coupled to the ground; wherein the second feeding point and the third feeding point are located on opposite sides of the center of the radiator, and the distance L3 between the third feeding point and the center of the radiator satisfies: 0.125×L0≤L3≤0.375×L0, the radiator and the third feeding circuit are used to generate a fourth resonance, the resonant frequency band of the fourth resonance including the first frequency band.

[0026] According to embodiments of this application, the third feed circuit and the radiator can form a third sub-antenna. The first, second, and third sub-antennas can all operate in the same frequency band and serve as sub-units in a MIMO antenna system to improve the data transmission rate of electronic devices.

[0027] Meanwhile, by setting the first capacitor and the second capacitor, the isolation between the first sub-antenna, the second sub-antenna and the third sub-antenna in the first frequency band can be improved, so that the first sub-antenna and the second sub-antenna both have good radiation characteristics in the first frequency band.

[0028] In conjunction with the first aspect, in some implementations of the first aspect, at the resonant point of the second resonance, the current of the radiator in the second region is in the same direction, the second region including the third feed point, and / or, at the resonant point of the third resonance, the current of the radiator in the second region is in the same direction, and / or, at the resonant point of the fourth resonance, the current of the radiator in the second region is in the opposite direction.

[0029] In conjunction with the first aspect, in some implementations of the first aspect, the electronic device further includes a bracket or a back cover, wherein the first radiator is located on the surface of the bracket or the surface of the back cover.

[0030] In a second aspect, an electronic device is provided, comprising: a floor; an antenna, the antenna comprising: a radiator, a first end and a second end of the radiator being open ends, at least a portion of the radiator being spaced apart from the floor, the radiator comprising a first feed point and a second feed point, the distance L1 between the first feed point and the center of the radiator satisfying: L1≤0.25×L0, the distance L2 between the second feed point and the center of the radiator satisfying: L2≤0.25×L0, where L0 is the length of the radiator, the radiators on both sides of the center of the radiator have the same length, and a first feed circuit, the first feed... The circuit is coupled to the first feed point, a first capacitor, and a second feed circuit. The radiator also includes a second feed point. A first end of the first capacitor is coupled to the second feed point, a second end of the first capacitor is coupled to the second feed circuit, and a second end of the first capacitor is coupled to the ground plane. The radiator and the first feed circuit are used to generate a first resonance and a second resonance, wherein the resonant frequency of the first resonance is lower than the resonant frequency of the second resonance. The radiator and the second feed circuit are used to generate a third resonance, wherein the resonant frequency band of the second resonance and the resonant frequency band of the third resonance both include the first frequency band.

[0031] According to embodiments of this application, a first feed circuit and a radiator can form a first sub-antenna, and a second feed circuit and a radiator can form a second sub-antenna. The first and second sub-antennas share the same radiator, allowing the electronic device to have more antennas within a smaller layout space, thereby increasing the data transmission rate of the electronic device.

[0032] Meanwhile, since the first capacitor is coupled between the second feed point and the second feed circuit, and the second end of the first capacitor is coupled to the ground, the first capacitor can improve the isolation between the first sub-antenna and the second sub-antenna in the first frequency band, so that both the first sub-antenna and the second sub-antenna have good radiation characteristics in the first frequency band.

[0033] Furthermore, the first sub-antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance may include a second frequency band. The second frequency band may include other communication frequency bands, thereby expanding the operating frequency band of the first sub-antenna and enabling the antenna to operate in more communication frequency bands.

[0034] In conjunction with the second aspect, in some implementations of the second aspect, the distance D between the first feed point and the second feed point satisfies: 0 <D≤0.125×L0。

[0035] In conjunction with the second aspect, in some implementations of the second aspect, the distance D between the first feed point and the second feed point satisfies: 1mm≤D≤5mm.

[0036] In conjunction with the second aspect, in some implementations of the second aspect, the equivalent capacitance of the first capacitor is greater than or equal to 0.1pF and less than or equal to 3pF.

[0037] In conjunction with the second aspect, in some implementations of the second aspect, the antenna further includes a feed element, the feed element and the second feed point being opposite to each other and not in contact, the feed element being coupled to the second feed circuit, and the equivalent capacitance formed between the feed element and the radiator serving as the first capacitance.

[0038] In conjunction with the second aspect, in some implementations of the second aspect, at the resonant point of the second resonance, the current of the radiator in the first region is in the same direction, the first region including the second feed point, and / or, at the resonant point of the third resonance, the current of the radiator in the first region is in the opposite direction.

[0039] In conjunction with the second aspect, in some implementations of the second aspect, at the resonant point of the second resonance, the electric field generated by the radiator is first polarized in a first region, the first region including the second feed point, and / or, at the resonant point of the third resonance, the electric field generated by the radiator is second polarized in the first region, the first polarization and the second polarization being orthogonal.

[0040] In conjunction with the second aspect, in some implementations of the second aspect, the resonant point f1 of the first resonance and the resonant point f2 of the second resonance satisfy: 1.5×f1≤f2≤2.5×f1.

[0041] In conjunction with the second aspect, in some implementations of the second aspect, the electronic device further includes a bracket or a back cover, wherein the first radiator is located on the surface of the bracket or the surface of the back cover.

[0042] Thirdly, an electronic device is provided, comprising: a floor; an antenna, the antenna comprising: a radiator, a first end and a second end of the radiator being grounded terminals, at least a portion of the radiator being spaced apart from the floor, the radiator comprising a first feed point and a second feed point, the distance L1 between the first feed point and the center of the radiator satisfying: 0.125×L0≤L1≤0.375×L0, the distance L2 between the second feed point and the center of the radiator satisfying: L2≤0.125×L0, where L0 is the length of the radiator, the lengths of the radiators on both sides of the center of the radiator are the same, and a first feed circuit. The first feeding circuit is coupled to the first feeding point, and the radiator further includes a second feeding point. The first end of the first capacitor is coupled to the second feeding point, the second end of the first capacitor is coupled to the second feeding circuit, and the second end of the first capacitor is coupled to the ground. The radiator and the first feeding circuit are used to generate a first resonance and a second resonance, the resonant frequency of the first resonance being lower than the resonant frequency of the second resonance. The radiator and the second feeding circuit are used to generate a third resonance, the resonant frequency band of both the second and third resonances including the first frequency band.

[0043] According to embodiments of this application, a first feed circuit and a radiator can form a first sub-antenna, and a second feed circuit and a radiator can form a second sub-antenna. The first and second sub-antennas share the same radiator, allowing the electronic device to have more antennas within a smaller layout space, thereby increasing the data transmission rate of the electronic device.

[0044] Meanwhile, since the first capacitor is coupled between the second feed point and the second feed circuit, and the second end of the first capacitor is coupled to the ground, the first capacitor can improve the isolation between the first sub-antenna and the second sub-antenna in the first frequency band, so that both the first sub-antenna and the second sub-antenna have good radiation characteristics in the first frequency band.

[0045] Furthermore, the first sub-antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance may include a second frequency band. The second frequency band may include other communication frequency bands, thereby expanding the operating frequency band of the first sub-antenna and enabling the antenna to operate in more communication frequency bands.

[0046] In conjunction with the third aspect, in some implementations of the third aspect, the distance D between the first feed point and the second feed point satisfies: 0.125×L0≤D≤0.5×L0.

[0047] In conjunction with the third aspect, in some implementations of the third aspect, the distance D between the first feed point and the second feed point satisfies: 5mm ≤ D ≤ 15mm.

[0048] In conjunction with the third aspect, in some implementations of the third aspect, the equivalent capacitance of the first capacitor is greater than or equal to 0.1pF and less than or equal to 3pF.

[0049] In conjunction with the third aspect, in some implementations of the third aspect, the antenna further includes a feed element, the feed element and the second feed point being opposite to each other and not in contact, the feed element being coupled to the second feed circuit, and the equivalent capacitance formed between the feed element and the radiator serving as the first capacitance.

[0050] In conjunction with the third aspect, in some implementations of the third aspect, at the resonant point of the second resonance, the current of the radiator in the first region is in the same direction, the first region including the second feed point, and / or, at the resonant point of the third resonance, the current of the radiator in the first region is in the opposite direction.

[0051] In conjunction with the third aspect, in some implementations of the third aspect, at the resonant point of the second resonance, the electric field generated by the radiator is first polarized in a first region, the first region including the second feed point, and / or, at the resonant point of the third resonance, the electric field generated by the radiator is second polarized in the first region, the first polarization and the second polarization being orthogonal.

[0052] In conjunction with the third aspect, in some implementations of the third aspect, the resonant point f1 of the first resonance and the resonant point f2 of the second resonance satisfy: 1.5×f1≤f2≤2.5×f1.

[0053] In conjunction with the third aspect, in some implementations of the third aspect, the electronic device further includes a bracket or a back cover, wherein the first radiator is located on the surface of the bracket or the surface of the back cover. Attached Figure Description

[0054] Figure 1 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0055] Figure 2 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0056] Figure 3 is a schematic diagram of the current distribution of the antenna 200 at the first resonance point provided in the embodiment of this application.

[0057] Figure 4 is a schematic diagram of the current distribution of the antenna 200 at the second resonance point provided in the embodiment of this application.

[0058] Figure 5 is a schematic diagram of the current distribution of the antenna 200 at the resonant point of the third resonance provided in the embodiment of this application.

[0059] Figure 6 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0060] Figure 7 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0061] Figure 8 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0062] Figure 9 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0063] Figure 10 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0064] Figure 11 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 2.

[0065] Figure 12 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 2 at the resonance point of the first resonance.

[0066] Figure 13 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 2 at the resonance point of the second resonance.

[0067] Figure 14 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 2 at the resonance point of the third resonance.

[0068] Figure 15 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0069] Figure 16 is a schematic diagram of the current distribution of the antenna 200 at the fourth resonance point provided in the embodiment of this application.

[0070] Figure 17 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 15.

[0071] Figure 18 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0072] Figure 19 is a schematic diagram of the current distribution of the antenna 200 at the first resonance point provided in the embodiment of this application.

[0073] Figure 20 is a schematic diagram of the current distribution of the antenna 200 at the second resonance point provided in the embodiment of this application.

[0074] Figure 21 is a schematic diagram of the current distribution of the antenna 200 at the resonant point of the third resonance provided in the embodiment of this application.

[0075] Figure 22 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 18.

[0076] Figure 23 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 18 at the resonance point of the first resonance.

[0077] Figure 24 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 18 at the resonance point of the second resonance.

[0078] Figure 25 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 18 at the resonance point of the third resonance.

[0079] Figure 26 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0080] Figure 27 is a schematic diagram of the current distribution of the antenna 200 at the first resonance point provided in the embodiment of this application.

[0081] Figure 28 is a schematic diagram of the current distribution of the antenna 200 at the second resonance point according to an embodiment of this application.

[0082] Figure 29 is a schematic diagram of the current distribution of the antenna 200 at the resonant point of the third resonance provided in the embodiment of this application.

[0083] Figure 30 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 26.

[0084] Figure 31 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 26 at the resonance point of the first resonance.

[0085] Figure 32 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 26 at the resonance point of the second resonance.

[0086] Figure 33 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 26 at the resonance point of the third resonance. Detailed Implementation

[0087] The following explains the terms that may appear in the embodiments of this application.

[0088] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0089] The phrase "within the range" used in this application, unless otherwise specified, includes both endpoints of the range by default. For example, in the range of 1 to 5, it includes the values ​​1 and 5.

[0090] Coupling can be understood as direct coupling and / or indirect coupling. "Coupled connection" can be understood as a direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection," which is understood as physical contact and electrical conduction between components; it can also be understood as the form of connection between different components in a circuit structure through physical lines that can transmit signals, such as copper foil or wires on a printed circuit board (PCB). "Indirect coupling" can be understood as two conductors conducting electricity through a gap / non-contact method. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between the gaps between two conductive components.

[0091] Components / devices: including at least one of lumped components / devices and distributed components / devices.

[0092] Lumped components / devices: This refers to all components whose size is much smaller than the wavelength relative to the circuit's operating frequency. For signals, the characteristics of these components remain constant regardless of frequency. Lumped components / devices can include lumped capacitors, lumped inductors, etc.

[0093] Distributed elements / devices: Unlike lumped elements, when a signal passes through an element, the characteristics of each point within the element will vary depending on the signal. Therefore, the element as a whole cannot be considered a single entity with fixed characteristics, and should be called a distributed element. Distributed elements / devices can include distributed capacitance, distributed inductance, etc.

[0094] Capacitance: can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitance) includes the equivalent capacitance formed by two conductive components separated by a certain gap.

[0095] Inductance: can be understood as lumped inductance and / or distributed inductance. Lumped inductance includes inductive components, such as inductive elements; distributed inductance (or distributed inductance) includes the equivalent inductance formed through a conductive element of a certain length, such as the equivalent inductance formed by a conductor due to bending or rotation.

[0096] Radiator: In an antenna, this is the device used to receive / transmit electromagnetic wave radiation. In some cases, the term "antenna" is narrowly defined as a radiator, which converts 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 via a feed line, where it is converted into electromagnetic wave energy of a specific polarization and radiated in the desired direction. The receiving radiator converts the electromagnetic wave energy of a specific polarization from a specific direction in space back into modulated high-frequency current energy, which is then transmitted to the receiver input via a feed line.

[0097] The radiator may include a conductor with a specific shape and size, such as a wire or sheet, and this application does not limit the specific shape. In one embodiment, the wire radiator may be simply referred to as a wire antenna. In one embodiment, the wire radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the wire 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 wire radiator, or the radiator of the wire antenna, is much smaller than the wavelength (e.g., the wavelength of the medium) (e.g., less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (e.g., the wavelength of the medium) (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, and inverted F antennas (also known as IFA, Inverted F Antenna). For example, in a dipole antenna, each dipole antenna typically includes two radiating stubs, each fed from the feed end of the radiating stub by a feed section. For example, an inverted-F antenna (IFA) can be considered as a monopole antenna with an added ground path. An IFA antenna has one feed point and one ground point, and is called an inverted-F antenna because its side view is inverted-F shaped. 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 a PIFA). In one embodiment, the sheet radiator may be implemented using a planar conductor (e.g., a conductive sheet or conductive coating). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet. In one embodiment, the sheet radiator may include a conductive coating, such as silver paste. The shape of the sheet radiator includes circular, rectangular, and annular shapes, and this 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, wherein the dielectric substrate is disposed between the radiator and the ground plane.

[0098] Radiators may also include slots or gaps formed on a conductor, for example, closed or semi-closed slots or gaps formed on a grounded conductor surface. In one embodiment, a slotted or slit radiator may be simply referred to as a slot antenna or a gap antenna. In one embodiment, the radial dimension (e.g., including width) of the slot or gap of the slot antenna / gap antenna is much smaller than the wavelength (e.g., the dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), while the length dimension may be comparable to the wavelength (e.g., the dielectric wavelength) (e.g., a length of approximately 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, a radiator with a closed slot or gap may be simply referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or gap (e.g., an opening added to a closed slot or gap) may be simply referred to as an open slot antenna. In some embodiments, the gap shape is elongated. In some embodiments, the length of the gap is approximately half a wavelength (e.g., the dielectric wavelength). In some embodiments, the length of the gap is approximately an integer multiple of a wavelength (e.g., one dielectric wavelength). In some embodiments, the slot can be fed by transmission lines connected across one or both sides, thereby exciting a radio frequency electromagnetic field on the slot and radiating electromagnetic waves into space. In one embodiment, the radiator of the slot antenna or gap antenna can be implemented by a conductive frame grounded at both ends, also known as a frame antenna; in this embodiment, the slot antenna or gap antenna can be viewed as including a linear radiator, the linear radiator being spaced apart from the ground and grounded at both ends, thereby forming a closed or semi-closed slot or gap. In one embodiment, the radiator of the slot antenna or gap antenna can be implemented by a support conductor grounded at both ends, also known as a support antenna.

[0099] A power supply circuit is a circuit used for receiving and / or transmitting radio frequency (RF) signals. A power supply circuit can include a transceiver and an RF front-end. In some narrower senses, "power supply circuit" refers to an RF IC (Radio Frequency Integrated Circuit), which can be considered to include both the RF front-end circuit (or RF front-end chip) and the transceiver. The power supply circuit has the function of converting radio waves (e.g., RF signals) into signals (e.g., digital signals). It is generally considered part of the RF component.

[0100] In some embodiments, the electronic device may also include a test socket (or, RF socket or RF test socket). This test socket can be used to insert a coaxial cable to test the characteristics of the RF front-end circuitry or the radiator of the antenna. The RF front-end circuitry can be considered as the circuitry coupled between the test socket and the transceiver.

[0101] 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 an electronic device.

[0102] It should be understood that any two feed circuits in the first / second / ...Nth feed circuit of this application may include the same transceiver. For example, one transmit channel of a transceiver may serve as the first feed circuit and one receive channel may serve as the second feed circuit, or for example, the first receive channel of a transceiver may serve as the first feed circuit and the second receive channel may serve as the second feed circuit. Any two feed circuits in the first / second / ...Nth feed circuit of this application may also include the same radio frequency front-end circuit, for example, the signal may be processed by a tuning circuit or amplifier in a radio frequency front-end circuit.

[0103] It should also be understood that the two feed circuits in the first / second / ...Nth feed circuit of this application typically correspond to two RF test sockets in an electronic device.

[0104] A matching circuit is a circuit used to adjust the radiation characteristics of an antenna. In one embodiment, the matching circuit is coupled between the feed circuit and the corresponding radiator. In another embodiment, the matching circuit is coupled between the test mount and the radiator. Typically, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In one embodiment, the matching circuit may include a tuning circuit and / or components, which may be components for switching the coupling connection of the radiator. The matching circuit has impedance matching and / or frequency tuning functions. It is typically considered part of the antenna.

[0105] The grounding / feeding structure may include connectors, such as metal springs, and the radiator is coupled to the ground / feeding circuit via the grounding structure. In some embodiments, the feeding structure may include a transmission line / feeding wire, and the grounding structure may include a grounding wire.

[0106] End / Point: The term "end / point" in the context of the antenna radiator's first end / second end / feed end / ground end / feed point / grounding point / connection point should not be narrowly interpreted as necessarily being a point or end physically disconnected from other radiators. It can also be considered as a point or segment on a continuous radiator. In one embodiment, "end / point" can include a connection / coupling region on the antenna radiator that couples to other conductive structures. For example, a feed end / feed point can be a connection / coupling region on the antenna radiator that couples to a feed structure or feed circuit (e.g., a region facing a part of the feed circuit). Similarly, a ground end / grounding point can be a connection / coupling region on the antenna radiator that couples to a ground structure or ground circuit (e.g., a region facing a part of the ground circuit).

[0107] Open terminal, closed terminal: In some embodiments, open terminal and closed terminal are, for example, relative to whether or not they are grounded; the closed terminal is grounded, and the open terminal is not grounded. In some embodiments, open terminal and closed terminal are, for example, relative to other conductors; the closed terminal is electrically connected to other conductors, and the open terminal is not electrically connected to other conductors. In one embodiment, the open terminal may also be referred to as a floating terminal, free terminal, open terminal, or open-circuit terminal. In one embodiment, the closed terminal may also be referred to as a ground terminal or short-circuit terminal. It should be understood that in some embodiments, other conductors can be coupled through the open terminal to transfer coupled energy (which can be understood as transferring current).

[0108] In some embodiments, the understanding of "closed end" can also be from the perspective of current distribution. A closed end or ground end can be understood as a point of high current or low electric field on a radiator. In one embodiment, coupling electronic devices (e.g., capacitors, inductors, etc.) through a closed end can maintain the current distribution characteristics of the point of high current / low electric field. In one embodiment, opening a slit at or near the closed end (e.g., filling the slit with insulating material) can maintain the current distribution characteristics of the point of high current / low electric field.

[0109] In some embodiments, the understanding of "open terminal" can also be from the perspective of current distribution. An open terminal or a floating terminal can be understood as a point with a small current or a point with a large electric field on the radiator. In one embodiment, coupling electronic devices (e.g., capacitors, inductors, etc.) through an open terminal can maintain the current distribution characteristics of the point with a small current or a large electric field.

[0110] It should be understood that when an electronic device (e.g., capacitor, inductor, etc.) is coupled at the radiator end of a gap (which, from the perspective of the radiator's structure, is similar to the radiator at the opening of an open or floating end), the radiator end can be a point with a large current / small electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0111] The "floating radiator" mentioned in the embodiments of this application refers to a radiator that is not directly connected to the feed line / feed branch and / or ground line / ground branch, but is fed and / or grounded through indirect coupling.

[0112] It should be understood that "suspended" in "suspended end" or "suspended radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the suspended radiator may be, for example, a radiator disposed on the inner surface of an insulating back cover.

[0113] The current in the same direction / opposite direction mentioned in the embodiments of this application should be understood as the main current on the same side of the conductor being in the same direction / opposite direction. For example, when a current distributed in the same direction is excited on a conductor that is bent or looped (e.g., the current path is also bent or looped), it should be understood that, for example, the main current excited on the conductors on both sides of a looped conductor (e.g., on the conductors on both sides of a gap) is opposite in direction, but it still falls under the definition of current distributed in the same direction in the embodiments of this application. In one embodiment, current in the same direction on a conductor can mean that the current on the conductor has no reverse point. In one embodiment, current in opposite direction on a conductor can mean that the current on the conductor has at least one reverse point. In one embodiment, current in the same direction on two conductors can mean that the current on both conductors has no reverse point and flows in the same direction. In one embodiment, current in opposite direction on two conductors can mean that the current on both conductors has no reverse point and flows in opposite directions. Current in the same direction / opposite direction on multiple conductors can be understood accordingly.

[0114] Resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range where resonance occurs. The resonant frequency can be a frequency range where the return loss characteristic is less than -5dB. The point of strongest resonance can be called the resonant point, and the frequency corresponding to the resonant point is the center frequency. The return loss characteristic of the center frequency can be less than -10dB, -15dB, or less than -20dB. It should be understood that, unless otherwise specified, when the antenna / radiator in this application generates "first / second...resonance," the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or in other words, the lowest frequency resonance generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to a specific design, and each antenna mode can correspond to a fundamental mode resonance.

[0115] Antenna polarization: At a given point in space, the electric field intensity E (vector) is a function of time t. As time progresses, the endpoint of the vector periodically traces a trajectory in space. If this trajectory is a straight line and perpendicular to the ground, it is called vertical polarization; if it is horizontal to the ground, it is called horizontal polarization. If the trajectory is elliptical or circular, and when viewed along the propagation direction, it rotates clockwise or right-handed with time, it is called right-hand circular polarization (RHCP); if it rotates counterclockwise or left-handed with time, it is called left-hand circular polarization (LHCP).

[0116] Resonant frequency band: The range of resonant frequencies is the resonant frequency band. The frequency range in which the return loss characteristic of the resonant frequency point is less than -5dB can be regarded as the resonant frequency band.

[0117] Communication band / operating band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting the B40 band operates within the frequency range of 2300MHz to 2400MHz, or in other words, the antenna's operating band includes the B40 band. The frequency range that meets the specifications can be considered the antenna's operating band.

[0118] 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.

[0119] Electrical length: can be the ratio of physical length (i.e., mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. Electrical length can satisfy the following formula:

[0120] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0121] Wavelength: or operating wavelength, can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming the center frequency of the B1 uplink band (resonant frequency from 1920MHz to 1980MHz) is 1955MHz, then the operating wavelength can be the wavelength calculated using this frequency. Not limited to the center frequency, "operating wavelength" can also refer to the wavelength corresponding to the non-center frequency of the resonant frequency or operating frequency band.

[0122] It should be understood that the wavelength of the radiation signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3 × 10⁻⁶. 8 m / s. The wavelength of the radiated signal in the medium can be calculated as follows: medium Where ε is the relative permittivity of the medium. The wavelength in the embodiments of this application typically 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 the center frequency of the B1 uplink band (resonant frequency of 1920MHz to 1980MHz) is 1955MHz, then the wavelength can be the medium wavelength calculated using this frequency. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to the non-center frequency of the resonant frequency or operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of this application can be simply calculated using the relative permittivity of the medium filling one or more sides of the radiator.

[0123] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port after passing through the antenna circuit to the transmit power at the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the higher the antenna's radiation efficiency. Conversely, the larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the antenna's radiation efficiency.

[0124] Antenna return loss can be represented by the S11 parameter, which is one of the S-parameters. S11 represents the reflection coefficient, and this parameter characterizes the antenna's transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the less energy the antenna reflects back, which means more energy actually enters the antenna, and the higher the antenna's system efficiency. Conversely, the larger the S11 parameter, the greater the antenna return loss, and the lower the antenna's system efficiency.

[0125] It should be noted that in engineering, an S11 value of -6dB is generally used as the standard. When the S11 value of an antenna is less than -6dB, the antenna can be considered to be working normally, or the antenna can be considered to have good transmission efficiency.

[0126] Ground (GND): can generally refer to at least a portion of any grounding layer, ground plane, or grounding metal layer within an electronic device (such as a mobile phone), or at least a portion of any combination of the aforementioned grounding layers, ground planes, or grounding components. "Ground" can be used for grounding components within an electronic device, or in other words, can be used as a reference ground for components within an electronic device. Typically, large areas of metal (e.g., metal layers) within an electronic device can serve as "ground." In one embodiment, "ground" can include any one or more of the following: a grounding layer of the electronic device's circuit board, a ground plane formed by the electronic device's frame, a grounding metal layer formed by a thin metal film beneath the screen, a conductive grounding layer of a battery, a metal hinge of a foldable electronic device, a metal back cover of the electronic device (e.g., when at least a portion of the back cover is metal), and conductive or metal components electrically connected to the aforementioned grounding layer / ground plane / metal layer. In one embodiment, the circuit board may be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12-to-14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric or insulating layers such as fiberglass, polymers, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a trace layer, the trace layer and the ground layer being electrically connected via vias. In one embodiment, components such as displays, touchscreens, input buttons, transmitters, processors, memory, batteries, charging circuits, and system-on-chip (SoC) devices may be mounted on or connected to the circuit board; or electrically connected to the trace layers and / or ground layers in the circuit board. For example, a radio frequency source is disposed on a trace layer.

[0127] Any of the aforementioned grounding layers, ground planes, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material may be any of the following: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate and tin-plated copper, graphite-impregnated cloth, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. Those skilled in the art will understand that grounding layers / ground planes / grounding metal layers may also be made of other conductive materials.

[0128] Grounding: refers to coupling with the aforementioned ground / floor via a grounding structure and / or grounding circuit. In one embodiment, grounding can be achieved through physical grounding, such as through a structural component of the mid-frame to achieve physical grounding at a specific location on the frame (or, physical ground). In another embodiment, grounding can be achieved through device grounding, such as through devices like capacitors / inductors / resistors connected in series or parallel (or, device ground).

[0129] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings.

[0130] As shown in Figure 1, the electronic device 100 may include: a cover 13, a display / module 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, the cover 13 may be a glass cover, but it may also be replaced with a cover made of other materials, such as a PET (Polyethylene terephthalate) cover.

[0131] The cover plate 13 can be set close to the display module 15, and can be mainly used to protect the display module 15 from dust.

[0132] In one embodiment, the display module 15 may include a liquid crystal display (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and this application embodiment does not limit this.

[0133] The mid-frame 19 primarily serves to support the entire device. Figure 1 shows the PCB 17 positioned between the mid-frame 19 and the rear cover 21. It should be understood that in one embodiment, the PCB 17 may also be positioned between the mid-frame 19 and the display module 15; this application does not limit this. The printed circuit board PCB 17 can be made of flame-retardant material (FR-4) dielectric, Rogers dielectric, or a hybrid of Rogers and FR-4 dielectric, etc. Here, FR-4 is a designation for a flame-retardant material grade, and Rogers dielectric is a high-frequency board. Components, such as radio frequency chips, are carried on the PCB 17. In one embodiment, a metal layer can be disposed on the printed circuit board PCB 17. This metal layer can be used for grounding components carried on the PCB 17, or for grounding other components, such as bracket antennas, frame antennas, etc. This metal layer can be called a ground plane, grounding plate, or grounding layer. In one embodiment, this metal layer can be formed by etching metal onto the surface of any dielectric layer in the PCB 17. In one embodiment, the metal layer for grounding may be disposed on the side of the printed circuit board PCB 17 near the mid-frame 19. In one embodiment, the edge of the printed circuit board PCB 17 may be considered as the edge of its ground layer. In one embodiment, the metal mid-frame 19 may also be used for grounding the aforementioned components. The electronic device 100 may also have other ground / grounding / grounding layers, as previously described, and will not be repeated here.

[0134] Due to the compact nature of electronic devices, a ground plane / grounding layer is typically provided in the internal space 0-2mm from the inner surface of the frame (e.g., printed circuit boards, mid-frames, screen metal layers, batteries, etc. can all be considered part of the ground plane). In one embodiment, a medium is filled between the frame and the ground plane. The length and width of the rectangle formed by the inner surface contour of the filling medium can be simply considered as the length and width of the ground plane; alternatively, the length and width of the rectangle formed by the superimposed contour of all conductive parts inside the frame can be considered as the length and width of the ground plane.

[0135] The electronic device 100 may also include a battery (not shown in the figure). The battery may be disposed between the middle frame 19 and the back cover 21, or between the middle frame 19 and the display module 15; this embodiment does not limit this. In some embodiments, the PCB 17 is divided into a motherboard and a daughterboard, and the battery may be disposed between the motherboard and the daughterboard. The motherboard may be disposed between the middle frame 19 and the upper edge of the battery, and the daughterboard may be disposed between the middle frame 19 and the lower edge of the battery.

[0136] The electronic device 100 may also include a frame 11, which may include a conductive material such as metal. The frame 11 may be disposed between the display module 15 and the back cover 21 and extend circumferentially around the periphery of the electronic device 100. The frame 11 may have four sides surrounding the display module 15 to help secure the display module 15.

[0137] In one implementation, the frame 11, primarily composed of conductive material, can be referred to as the conductive frame or metal frame of the electronic device 100, suitable for industrial design (ID) with a metallic appearance. In another implementation, the outer surface of the frame 11 is primarily made of conductive material, such as metal, thus forming the appearance of a metallic frame. In these implementations, the conductive portion of the outer surface of the frame 11 can be used as an antenna radiator of the electronic device 100, and is commonly referred to as a frame antenna.

[0138] In another implementation, the outer surface of the frame 11 is primarily made of a non-conductive material, such as plastic, forming a non-metallic frame appearance suitable for non-metallic IDs. In another implementation, the inner surface of the frame 11 may include a conductive material, such as a metallic material. In this implementation, the conductive portion of the inner surface of the frame 11 can be used as an antenna radiator of the electronic device 100. It should be understood that the radiator (or the conductive material of the inner surface) disposed on the inner surface of the frame 11 can be attached to the non-conductive material of the frame 11 to minimize the volume occupied by the radiator and to be closer to the outside of the electronic device 100, achieving better signal transmission performance, and can also be referred to as a frame antenna. It should be noted that the antenna radiator being attached to the non-conductive material of the frame 11 means that the antenna radiator can be tightly attached to the inner surface of the non-conductive material, or it can be embedded inside the non-conductive material, or it can be close to the inner surface of the non-conductive material. For example, there can be a certain small gap between the antenna radiator and the inner surface of the non-conductive material. It should be understood that both the conductive material and the non-conductive material can be considered as part of the frame 11.

[0139] It should be understood that the frame 11 may have insulating gaps, with the conductive portion of the frame between the insulating gaps and / or between the insulating gaps and the grounding point serving as radiators, thereby forming a frame antenna (it should be understood that the radiator of the frame antenna may also include the conductive portion of the frame between the grounding point and the grounding point). When the frame 11 is formed of a conductive material such as metal, the insulating gap can be understood as a gap in the frame 11 filled with a non-metallic material (insulating material), in which case the gap is visible on the outer surface. When the outer surface of the frame 11 is a non-conductive material, the insulating gap can be understood as the end of the radiator on the inner surface of the frame 11 (e.g., an end not electrically connected to other radiators or conductors), or as a gap formed between radiators on the inner surface of the frame 11, in which a non-metallic material (insulating material) may be provided, or it may not be provided with a non-metallic material, for example, filled with air, in which case the gap is not visible on the outer surface.

[0140] In Figure 1 and subsequent embodiments, the electronic device 100 is illustrated using a metal frame (conductive frame) and a visible slit (insulating gap). In this case, the metal frame serves as at least part of the antenna radiator. It should be understood that the same technical effect can be achieved when the frame 11 of the electronic device 100 is a non-metallic frame (a slit not visible on the surface), but for the sake of brevity, it will not be elaborated further.

[0141] The middle frame 19 may include the frame 11. The middle frame 19, including the frame 11, is a single unit that supports the electronic components in the device. The cover plate 13 and the rear cover 21 respectively cover the upper and lower edges of the frame to form the 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 housing of the electronic device 100. It should be understood that "housing" may refer to part or all of any one of the cover plate 13, the rear cover 21, the frame 11, or the middle frame 19, or to any combination of the cover plate 13, the rear cover 21, the frame 11, or the middle frame 19.

[0142] The frame 11 can at least partially serve as an antenna radiator to transmit / receive radio frequency signals. This portion of the frame serving as the radiator may have gaps between it and the rest of the middle frame 19, thereby ensuring a good radiation environment for the antenna radiator. In one embodiment, the middle frame 19 may have an aperture at this portion of the frame serving as the radiator to facilitate antenna radiation.

[0143] Alternatively, the frame 11 may not be considered 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 inwardly extending protrusions to connect with the middle frame 19, for example, by means of spring clips, screws, welding, etc. The protrusions of the frame 11 can also be used to receive feed signals, so that at least a portion of the frame 11 acts as a radiator of the antenna to transmit / receive radio frequency signals. A gap may exist between this portion of the frame acting as the radiator and the middle frame 19, thereby ensuring that the antenna radiator has a good radiation environment, enabling the antenna to have good signal transmission capabilities.

[0144] The back cover 21 can be made of metal; it can also be made of non-conductive material, such as a glass back cover, a plastic back cover, or other non-metallic back cover; or it can be made of both conductive and non-conductive materials. In one embodiment, the back cover 21, which includes conductive material, can replace the middle frame 19 and form an integral part with the frame 11, providing support for the electronic components in the whole device.

[0145] In one embodiment, conductive portions in the mid-frame 19 and / or rear cover 21 can serve as a reference ground for the electronic device 100, wherein the frame 11, PCB 17, etc. of the electronic device can be grounded through electrical connection with the mid-frame.

[0146] The antenna of the electronic device 100 can also be housed within a housing, such as a bracket antenna, a millimeter-wave antenna, etc. (not shown in Figure 1). The clearance of the antenna housed within the housing can be obtained by a slot / aperture on any of the middle frame, and / or bezel, and / or back cover, and / or display screen, or by a non-conductive gap / aperture formed between any of these. This clearance configuration ensures the antenna's radiation characteristics. It should be understood that the antenna clearance can be a non-conductive area formed by any conductive component within the electronic device 100, through which the antenna radiates signals to the external space. In one embodiment, the antenna can be based on a flexible printed circuit (FPC), a laser-direct-structuring (LDS) antenna, or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also be a transparent structure embedded within the screen of the electronic device 100, making it a transparent antenna unit embedded within the screen of the electronic device 100.

[0147] Figure 1 only schematically shows some of the components included in the electronic device 100, and the actual shape, size and construction of these components are not limited to the above figures.

[0148] It should be understood that in the embodiments of this application, the side where the display screen of the electronic device is located can be considered as the front, the side where the back cover is located as the back, and the side where the frame is located as the side.

[0149] It should be understood that, in the embodiments of this application, when a user holds (typically vertically and facing the screen) an electronic device, the orientation of the electronic device includes a top, bottom, left side, and right side.

[0150] With the rapid development of wireless communication technology and the ever-increasing demands for transmission speed, sub-6GHz MIMO antenna systems have been rapidly developed. Sub-6GHz MIMO antenna systems can deploy a large number of antennas at both the base station and the terminal, enabling simultaneous data transmission through multiple channels in both the time and frequency domains, effectively improving spectral efficiency and significantly increasing data transmission speed. Therefore, it has become one of the key development areas for communication systems. However, due to increasingly compact layouts within electronic devices, when several antennas operating in the same frequency band are designed together within a limited space in a terminal device, the close proximity of the antennas leads to increasing interference and decreased isolation, causing inconvenience for users.

[0151] This application provides an electronic device including an antenna. The antenna is formed by a first feeding circuit and a second feeding circuit, respectively, and the first sub-antenna and the second sub-antenna have good isolation.

[0152] Figure 2 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0153] As shown in Figure 2, the electronic device 100 includes an antenna 200 and a floor 300.

[0154] The antenna 200 includes a radiator 210, a first capacitor 221, a first feeding circuit 220, and a second feeding circuit 230.

[0155] At least a portion of the radiator 210 is spaced apart from the floor 300. The radiator 210 includes a first feed point 211 and a second feed point 212. The distance L1 between the first feed point 211 and the center of the radiator 210 satisfies: 0.125×L0≤L1≤0.375×L0. The distance L2 between the second feed point 212 and the center of the radiator 210 satisfies: 0.125×L0≤L2≤0.375×L0, where L0 is the length of the radiator. In one embodiment, both ends of the radiator 210 are open ends, and neither end of the radiator 210 is coupled to the floor 300.

[0156] It should be understood that the center of radiator 210 can be understood as the center of the length of radiator 210, and the lengths of radiators 210 on both sides of this center are the same. For the sake of brevity, the center of radiator 210 mentioned in the embodiments of this application can be understood accordingly, and will not be described in detail again. When the first feed point 211 and the second feed point 212 are within the above range, the radiator 210 can be better excited to resonate when electrical signals are fed into the first feed point 211 and the second feed point 212.

[0157] The first feed circuit 220 is coupled to the first feed point 211. The first end of the first capacitor 221 is coupled to the second feed point 212. The second end of the first capacitor 221 is coupled to the second feed circuit 230, and the second end of the first capacitor 221 is coupled to the ground plane 300.

[0158] Radiator 210 and first feed circuit 220 are used to generate a first resonance and a second resonance, the resonant frequency of the first resonance being lower than the resonant frequency of the second resonance. Radiator 210 and second feed circuit 230 are used to generate a third resonance. The resonant frequency bands of both the second and third resonances include the first frequency band.

[0159] The first feed circuit 220 and the radiator 210 can form a first sub-antenna, and the second feed circuit 230 and the radiator 210 can form a second sub-antenna. It should be understood that the first and second sub-antennas can include the same operating frequency band and both serve as sub-units in the MIMO antenna system to improve the data transmission rate of the electronic device 100.

[0160] According to embodiments of this application, the first and second sub-antennas share the radiator 210, allowing the electronic device 100 to have more antennas within a smaller layout space, thereby increasing the data transmission rate of the electronic device 100. Simultaneously, since a first capacitor 221 is coupled between the second feed point 212 and the second feed circuit 230, and the second end of the first capacitor 221 is coupled to the ground plane 300, the first capacitor 221 can improve the isolation between the first and second sub-antennas in the first frequency band, enabling both the first and second sub-antennas to have good radiation characteristics in the first frequency band.

[0161] Furthermore, the first sub-antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance may include a second frequency band. The second frequency band may include other communication frequency bands, thereby expanding the operating frequency band of the first sub-antenna and enabling the antenna 200 to operate in more communication frequency bands.

[0162] In one embodiment, the second frequency band includes the 2.4 GHz band (2.4 GHz - 2.4835 GHz) of Wi-Fi wireless network communication technology or Bluetooth (BT) wireless technology (2.4 GHz - 2.4835 GHz). The first frequency band includes the 5 GHz band (5.15 GHz - 5.25 GHz) of Wi-Fi. In one embodiment, the second frequency band includes the N78 band (3300 MHz - 3800 MHz). The first frequency band includes at least a portion of the ultra-wideband (UWB) frequency band.

[0163] It should be understood that, for the sake of brevity, this application embodiment only uses the first frequency band and the second frequency band, which include the above-mentioned communication frequency bands, as an example for illustration. In actual production or application, other communication frequency bands may also be included.

[0164] In one embodiment, at the resonant point of the first resonance, the currents on the radiator 210 are in the same direction, as shown in Figure 3.

[0165] It should be understood that when both ends of the radiator 210 are open, and the first feeding circuit 220 feeds in an electrical signal, since the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfies the above proportional relationship, the first resonance can be generated by the half-wavelength mode of the radiator 210, and the current on the radiator 210 is in the same direction.

[0166] In one embodiment, at the resonant point of the second resonance, the currents on the radiator 210 are opposite on both sides of the center. Since the distance L1 between the first feed point 211 and the center of the radiator 210 satisfies the above proportional relationship, the currents on the radiator 210 are in the same direction in the first region 231, as shown in Figure 4.

[0167] In one embodiment, at the resonant point of the third resonance, the current on the radiator 210 is reversed on both sides of the center, and the current on the radiator 210 is reversed in the first region 231, which includes the second feed point 212, as shown in FIG5.

[0168] The first region 231 can be understood as the region whose distance from the second feed point 212 is within a first threshold. For example, the first threshold can be 5mm, 3mm, etc. For the sake of brevity, all regions described in the embodiments of this application can be understood accordingly, and will not be described in detail here.

[0169] It should be understood that when both ends of the radiator 210 are open, and an electrical signal is fed into the first feed circuit 220, since the distance L2 between the second feed point 212 and the center of the radiator 210 satisfies the aforementioned proportional relationship, the second resonance can be generated by a wavelength-limited mode of the radiator 210, and the currents on the radiator 210 are opposite in direction on both sides of the center. Correspondingly, at the resonance point of the second resonance, the currents on the radiator 210 are in the same direction in the first region 231.

[0170] When both ends of the radiator 210 are open, and an electrical signal is fed into the second feed circuit 230, the third resonance can be generated by a similar one-wavelength mode of the radiator 210. Since the second end of the first capacitor 221 is coupled to the ground plane 300, when an electrical signal is fed into the second feed circuit 230, the current in the radiator 210 reverses on both sides of the second feed point 212. Correspondingly, at the resonant point of the third resonance, the current in the radiator 210 reverses in the first region 231.

[0171] Furthermore, since a first capacitor 221 is coupled between the second feed circuit 230 and the second feed point 212, the first capacitor 221 can prevent the radiator 210 from generating a resonance similar to the first resonance when an electrical signal is fed into the second feed circuit 230 (at the same time, it can also suppress the current transmission to the second feed circuit 230 when the radiator 210 generates the first resonance), thereby improving the isolation between the first sub-antenna and the second sub-antenna in the resonant frequency band of the first resonance.

[0172] In one embodiment, at the resonant point of the second resonance, the electric field generated by the radiator 210 exhibits a first polarization in the first region 231. At the resonant point of the third resonance, the electric field generated by the radiator 210 exhibits a second polarization in the first region 231. The first and second polarizations are orthogonal. This orthogonality can be understood as the electric field of the first polarization being orthogonal to the electric field of the second polarization in the far-field integral.

[0173] It should be understood that at the resonant point of the second resonance, the current on the radiator 210 is in the same direction in the first region 231, and this current distribution can generate a first-polarized electric field. At the resonant point of the third resonance, the current on the radiator 210 is in the opposite direction in the first region 231, and this current distribution can generate a second-polarized electric field. Since the first region 231 includes the second feed point 212, when the radiator 210 generates the third resonance, the first region 231 has a strong current, and the electric fields generated by the second resonance and the third resonance in the first region 231 are orthogonally polarized. Therefore, the first sub-antenna and the second sub-antenna have good isolation in the first frequency band.

[0174] In one embodiment, the first polarization is horizontal polarization, and the second polarization is vertical polarization. In one embodiment, at the resonant point of the first resonance, the electric field generated by the radiator 210 in the first region 231 exhibits the second polarization (vertical polarization).

[0175] In one embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: D ≤ 0.25 × L0. In another embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: 1 mm ≤ D ≤ 5 mm.

[0176] It should be understood that the first feed point 211 and the second feed point 212 can be located on the same side of the center of the radiator 210. Since the first feed point 211 and the second feed point 212 are located on the same side of the center of the radiator 210, the first region of the radiator 210 has a strong current when generating the second and third resonances. Because the first region has a strong current during both the second and third resonances, the electric fields generated by the radiator 210 during the second and third resonances have more orthogonal components, resulting in better isolation between the first sub-antenna and the second sub-antenna in the first frequency band.

[0177] In one embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: D≥0.25×L0, as shown in Figure 6.

[0178] It should be understood that the first feed point 211 and the second feed point 212 can be located on opposite sides of the center of the radiator 210. The first feed point 211 and the second feed point 212 can be arranged according to the internal space of the electronic device 100. This embodiment does not limit this. For the sake of brevity, this embodiment only uses the example of the first feed point 211 and the second feed point 212 being located on the same side of the center of the radiator 210 for illustration.

[0179] In one embodiment, the radiator 210 further includes a slot 240, as shown in FIG7. The slot 240 divides the radiator 210 into a first portion and a second portion. The second feed point 212 may be located in the first portion. The first portion may be coupled to the floor 300.

[0180] It should be understood that in the above embodiments, the first capacitor 221 is used as a lumped element for example. In actual production or design, the first capacitor 221 can also be a distributed element. For example, a distributed capacitor can be formed between the conductors on both sides of the slot 240, serving as the first capacitor. The equivalent capacitance value of the first capacitor can be adjusted by adjusting the width of the slot 240, the dielectric material filled in the slot 240, etc.

[0181] In one embodiment, the radiator 210 further includes a feed element 241, as shown in FIG8. The feed element 241 and the second feed point 212 are opposite to each other and do not contact each other, and the feed element 241 is coupled to the second feed circuit 230.

[0182] It should be understood that in the above embodiments, the second feed circuit 230 and the second feed point 212 are electrically connected (directly coupled) as an example. In actual production or design, the second feed circuit 230 and the second feed point 212 can also be indirectly coupled. In this case, a distributed capacitor can be formed between the feed element 241 and the radiator 210, serving as the first capacitor. The equivalent capacitance value of the first capacitor can be adjusted by adjusting the facing area of ​​the feed element 241 and the radiator 210, the distance between the feed element 241 and the radiator 210, etc.

[0183] In one embodiment, the equivalent capacitance of the first capacitor is greater than or equal to 0.1 pF. In one embodiment, the equivalent capacitance of the first capacitor is less than or equal to 3 pF. In one embodiment, the equivalent capacitance of the first capacitor is less than or equal to 2 pF. In one embodiment, the equivalent capacitance of the first capacitor is less than or equal to 1 pF. In one embodiment, the equivalent capacitance of the first capacitor is less than or equal to 0.5 pF.

[0184] It should be understood that the first capacitor 221 can be used to prevent the radiator 210 from generating a resonance similar to the first resonance when an electrical signal is fed into the second feed circuit 230 (at the same time, it can also suppress the current transmission to the second feed circuit 230 when the radiator 210 generates the first resonance). Therefore, the equivalent capacitance value of the first capacitor 221 can be determined based on the resonant frequency of the first resonance.

[0185] In one embodiment, the resonant frequency f2 of the second resonance and the resonant frequency f1 of the first resonance satisfy: 1.5×f1≤f2≤2.5×f1.

[0186] It should be understood that the radiator 210 may have at least one slot, as shown in Figure 9. The slot can be used to adjust the current path on the radiator 210 when it generates a first resonance and a second resonance, thereby causing the resonant points of the first and second resonances to be located at different frequencies, thus adjusting the radiation characteristics of the first sub-antenna in the resonant frequency bands of the first and second resonances. When the slot is located in the region where the current is strong when the radiator 210 generates the first resonance, it has a significant impact on the resonant frequency of the first resonance (a larger frequency shift). Similarly, when the slot is located in the region where the current is strong when the radiator 210 generates the second resonance, it has a significant impact on the resonant frequency of the second resonance (a larger frequency shift).

[0187] For the sake of brevity, this embodiment of the application only uses the example of setting a slot on the radiator 210. In actual production or design, the radiation characteristics of the first sub-antenna in the resonant frequency band of the first resonance and the resonant frequency band of the second resonance can also be adjusted by other means, such as setting elements on the radiator 210, coupling a tuning circuit with the radiator 210, etc., which will not be described in detail here.

[0188] In one embodiment, the resonant frequency f3 of the third resonance and the resonant frequency f1 of the first resonance satisfy: 1.5×f1≤f3≤2.5×f1.

[0189] It should be understood that the radiation characteristics of the second sub-antenna in the resonant frequency band of the third resonance can also be adjusted through the above technical solution.

[0190] In one embodiment, the electronic device 100 may further include a support 251, as shown in FIG10. The radiator 210 is located on the surface of the support 251.

[0191] In one embodiment, the electronic device 100 may further include a back cover 21. A radiator 210 is located on the surface of the back cover 21.

[0192] In one embodiment, a shielding cover 16 may be provided between the bracket 251 and the PCB 17. In one embodiment, a component may be provided inside the shielding cover 16 to prevent mutual interference between the component and the radiator 210.

[0193] It should be understood that when the radiator 210 is located inside the electronic device 100, since the radiator 210 is not located on the outer surface of the electronic device 100, it has a more flexible layout.

[0194] Figures 11 to 14 show the simulation results of the antenna 200 in the electronic device 100 shown in Figure 2. Figure 11 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 2. Figure 12 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 2 at the first resonance point. Figure 13 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 2 at the second resonance point. Figure 14 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 2 at the third resonance point.

[0195] As shown in Figure 11, the first sub-antenna (S11) resonates near 3.6 GHz and 7.6 GHz. The resonance near 3.6 GHz corresponds to the first resonance in the above embodiment. The resonance near 7.6 GHz corresponds to the second resonance in the above embodiment.

[0196] The second sub-antenna (S22) resonates near 7.6 GHz, which can be the third resonance in the above embodiment.

[0197] With S11 / S22 < -4dB as the boundary, the resonant frequency bands of both the second and third resonants include 7.5GHz-7.7GHz. Within this frequency band, the first and second sub-antennas have good isolation (S12 / S21), with an isolation greater than 15dB.

[0198] As shown in Figure 12, at the resonant point of the first resonance (e.g., 3.6 GHz), the currents on the radiator 210 are in the same direction, and the electric field generated by the first resonance in the first region 231 is vertically polarized.

[0199] As shown in Figure 13, at the resonant point of the second resonance (e.g., 7.6 GHz), the current on the radiator 210 is in the same direction in the first region 231 (the current on the radiator 210 is in opposite directions on both sides of the center of the radiator), and this current distribution in the first region 231 generates a horizontally polarized electric field.

[0200] As shown in Figure 14, at the resonant point of the third resonance (e.g., 7.6 GHz), the current on the radiator 210 reverses in the first region 231, and this current distribution in the first region 231 generates a vertically polarized electric field.

[0201] Figure 15 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0202] As shown in Figure 15, the antenna 200 also includes a second capacitor 222 and a third feed circuit 250.

[0203] The radiator 210 includes a third feed point 213, and the second feed point 212 and the third feed point 213 are located on both sides of the center of the radiator 210. The distance L3 between the third feed point 213 and the center of the radiator 210 satisfies: 0.125×L0≤L3≤0.375×L0.

[0204] The first terminal of the second capacitor 222 is coupled to the third feed point 213, the second terminal of the second capacitor 222 is coupled to the third feed circuit 250, and the second terminal of the second capacitor 222 is coupled to the ground plane 300. In one embodiment, the second capacitor 222 can be a lumped element or a distributed element, similar to the structure of the first capacitor 221 described in the above embodiments. For the sake of brevity, it will not be described in detail again.

[0205] Radiator 210 and third feed circuit 250 are used to generate a fourth resonance. The resonant frequency band of the fourth resonance includes the first frequency band. The third feed circuit 250 and radiator 210 can form a third sub-antenna. It should be understood that the first sub-antenna, second sub-antenna, and third sub-antenna can include the same operating frequency band and are all sub-units in the MIMO antenna system to improve the data transmission rate of electronic device 100.

[0206] It should be understood that the antenna 200 in the electronic device 100 shown in Figure 15 is different from the antenna 200 in the electronic device 100 shown in Figures 2, 6 to 10 only in the second capacitor 222 and the third feed circuit 250.

[0207] In the electronic device 100 shown in Figures 2, 6 to 10, the antenna 200 includes only a first sub-antenna and a second sub-antenna. However, in the electronic device 100 shown in Figure 15, the antenna 200 may also include a third sub-antenna. The first, second, and third sub-antennas share a radiator 210, allowing for more antennas to be arranged within a smaller layout space, thereby increasing the data transmission rate of the electronic device 100. Simultaneously, the inclusion of the first capacitor 221 and the second capacitor 222 improves the isolation between the first, second, and third sub-antennas in the first frequency band, ensuring that both the first and second sub-antennas exhibit good radiation characteristics in the first frequency band.

[0208] In one embodiment, at the resonant point of the third resonance, the current on the radiator 210 is reversed in the second region 232, which includes the third feed point 213, as shown in FIG16.

[0209] It should be understood that when both ends of the radiator 210 are open, and an electrical signal is fed into the third feed circuit 250, the fourth resonance can be generated by a similar one-wavelength mode of the radiator 210. Since the second end of the second capacitor 222 is coupled to the ground plane 300, when an electrical signal is fed into the third feed circuit 250, the current on the radiator 210 reverses on both sides of the third feed point 213. Correspondingly, at the resonant point of the fourth resonance, the current on the radiator 210 reverses in the second region 232.

[0210] Furthermore, since a second capacitor 222 is coupled between the second feed circuit 230 and the second feed point 212, the second capacitor 222 can prevent the radiator 210 from generating a resonance similar to the first resonance when the third feed circuit 250 is fed with an electrical signal (at the same time, it can also suppress the current transmission to the third feed circuit 250 when the radiator 210 generates the first resonance), thereby improving the isolation between the first sub-antenna and the third sub-antenna in the resonant frequency band of the first resonance.

[0211] In one embodiment, at the resonant point of the fourth resonance, the electric field generated by the radiator 210 is second polarized in the second region 232.

[0212] It should be understood that at the resonant point of the second resonance, the current on the radiator 210 is in the same direction in the first region 231 and the second region 232, and this current distribution can generate a first polarized electric field.

[0213] At the resonant point of the third resonance, the current on the radiator 210 is opposite in the first region 231 and in the same direction in the second region 232. The opposite current distribution in the first region 231 can generate a second polarized electric field, and the same current distribution in the second region 232 can generate a first polarized electric field.

[0214] At the resonant point of the fourth resonance, the current on the radiator 210 is in the same direction in the first region 231 and in the opposite direction in the second region 232. The current distribution in the same direction in the first region 231 can generate a first polarized electric field, and the current distribution in the opposite direction in the second region 232 can generate a second polarized electric field.

[0215] Since the second region 232 includes the third feed point 213, when the radiator 210 generates the fourth resonance, the second region 232 has a strong current. The electric field generated by the fourth resonance, the electric field generated by the second resonance, and the electric field generated by the third resonance in the second region 232 are orthogonally polarized. Therefore, the third antenna and the first sub-antenna and the second sub-antenna also have good isolation in the first frequency band.

[0216] For the sake of brevity, the antenna 200 in the electronic device 100 shown in Figure 10, and the antenna 200 in the electronic device 100 shown in Figures 4, 7, and 8, which are similar to each other, will not be described in detail. For example, similar parts include: the structure and position of the radiator 210; the current distribution on the radiator 210 at each resonant point; the distance D between the first feed point 211 and the second feed point 212; the type of the first capacitor 221 (lumped element or distributed element); the relative relationship and adjustment method between the resonant frequency f2 of the second resonance (or the resonant frequency f3 of the third resonance) and the resonant frequency f1 of the first resonance; and so on.

[0217] Figure 17 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 15.

[0218] As shown in Figure 17, the first sub-antenna (S11) resonates near 3.4 GHz and 7.7 GHz. The resonance near 3.4 GHz corresponds to the first resonance in the above embodiment. The resonance near 7.7 GHz corresponds to the second resonance in the above embodiment.

[0219] The second sub-antenna (S22) resonates near 7.7 GHz, which can be the third resonance in the above embodiment. The third sub-antenna (S33) resonates near 7.7 GHz, which can be the fourth resonance in the above embodiment.

[0220] With S11 / S22 / S33 < -4dB as the boundary, the resonant frequency bands of the second, third, and fourth resonants all cover 7.6GHz-7.8GHz. Within this frequency band, the first, second, and third sub-antennas exhibit good isolation (S12 / S21 / S13 / S31 / S32 / S23), with an isolation greater than 14dB.

[0221] Figure 18 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0222] As shown in Figure 18, the electronic device 100 includes an antenna 200 and a floor 300.

[0223] The antenna 200 includes a radiator 210, a first capacitor 221, a first feeding circuit 220, and a second feeding circuit 230.

[0224] At least a portion of the radiator 210 is spaced apart from the floor 300. The radiator 210 includes a first feed point 211 and a second feed point 212. The distance L1 between the first feed point 211 and the center of the radiator 210 satisfies: L1 ≤ 0.25 × L0. The distance L2 between the second feed point 212 and the center of the radiator 210 satisfies: L2 ≤ 0.25 × L0, where L0 is the length of the radiator. In one embodiment, the first end of the radiator 210 is a grounded end and the second end is an open end, and the first end of the radiator 210 is coupled to the floor 300.

[0225] It should be understood that when the first feed point 211 and the second feed point 212 are within the above range, the radiator 210 can be better excited to resonate when electrical signals are fed into the first feed point 211 and the second feed point 212.

[0226] The first feed circuit 220 is coupled to the first feed point 211. The first end of the first capacitor 221 is coupled to the second feed point 212. The second end of the first capacitor 221 is coupled to the second feed circuit 230, and the second end of the first capacitor 221 is coupled to the ground plane 300.

[0227] Radiator 210 and first feed circuit 220 are used to generate a first resonance and a second resonance, wherein the resonant frequency of the first resonance is lower than the resonant frequency of the second resonance. Radiator 210 and second feed circuit 230 are used to generate a third resonance. The resonant frequency bands of both the second and third resonances include the first frequency band. In one embodiment, the first resonance may include the second frequency band.

[0228] In one embodiment, the second frequency band includes the 2.4 GHz band (2.4 GHz - 2.4835 GHz) or BT (2.4 GHz - 2.4835 GHz) in Wi-Fi. The first frequency band includes the 5 GHz band (5.15 GHz - 5.25 GHz) in Wi-Fi. In one embodiment, the second frequency band includes the N78 band (3300 MHz - 3800 MHz). The first frequency band includes at least a portion of the frequency bands in UWB.

[0229] It should be understood that, for the sake of brevity, this application embodiment only uses the first frequency band and the second frequency band, which include the above-mentioned communication frequency bands, as an example for illustration. In actual production or application, other communication frequency bands may also be included.

[0230] The first feed circuit 220 and the radiator 210 can form a first sub-antenna, and the second feed circuit 230 and the radiator 210 can form a second sub-antenna.

[0231] It should be understood that the difference between the antenna 200 in the electronic device 100 shown in Figure 18 and the antenna 200 in the electronic device 100 shown in Figures 2, 6 to 10 lies only in the boundary conditions of the radiator 210.

[0232] In the electronic device 100 shown in Figures 2, 6 to 10, both ends of the radiator 210 are open. The first resonance can be generated by a half-wavelength mode of the radiator 210. The second resonance can be generated by a full-wavelength mode of the radiator 210. The third resonance can be generated by a similar full-wavelength mode of the radiator 210.

[0233] In the electronic device 100 shown in Figure 18, the first end of the radiator 210 is a grounded end, and the second end is an open end. The first resonance can be generated by a quarter-wavelength mode of the radiator 210. The second resonance can be generated by a three-quarter-wavelength mode of the radiator 210. The third resonance can be generated by a similar three-quarter-wavelength mode of the radiator 210. Similar to the antenna 200 in the electronic device 100 shown in Figures 2, 6 to 10, in the electronic device 100 shown in Figure 18, both the first sub-antenna and the second sub-antenna have good radiation characteristics in the first frequency band. Furthermore, since both the first and second sub-antennas reuse the radiator 210, more antennas can be placed in a smaller layout space, thereby increasing the data transmission rate of the electronic device 100.

[0234] In one embodiment, at the resonant point of the first resonance, the currents on the radiator 210 are in the same direction, as shown in Figure 19.

[0235] It should be understood that when the first end of the radiator 210 is a grounded end and the second end is an open end, and the first feeding circuit 220 feeds in an electrical signal, since the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfies the above proportional relationship, the first resonance can be generated by the quarter-wavelength mode of the radiator 210, and the current on the radiator 210 is in the same direction.

[0236] In one embodiment, at the resonant point of the second resonance, the currents on the radiator 210 reverse on both sides of the center, as shown in Figure 20.

[0237] In one embodiment, at the resonant point of the third resonance, the current on the radiator 210 is reversed in the first region 231, which includes the second feed point 212, as shown in FIG21.

[0238] It should be understood that when the first end of the radiator 210 is grounded and the second end is open, and an electrical signal is fed into the first feed circuit 220, since the distance L1 between the first feed point 211 and the center of the radiator 210 satisfies the above-mentioned proportional relationship, the second resonance can be generated by the three-quarter wavelength mode of the radiator 210. At the resonance point of the second resonance, the current on the radiator 210 is in the same direction in the first region 231.

[0239] When the first end of the radiator 210 is grounded and the second end is open, and an electrical signal is fed into the second feed circuit 230, the third resonance can be generated by a three-quarter wavelength mode of the radiator 210 because the distance L2 between the second feed point 212 and the center of the radiator 210 satisfies the aforementioned proportional relationship. Since the second end of the first capacitor 221 is coupled to the ground plane 300, the current on the radiator 210 reverses on both sides of the second feed point 212 when an electrical signal is fed into the second feed circuit 230. Correspondingly, at the resonant point of the third resonance, the current on the radiator 210 reverses in the first region 231.

[0240] Furthermore, since a first capacitor 221 is coupled between the second feed circuit 230 and the second feed point 212, the first capacitor 221 can prevent the radiator 210 from generating a resonance similar to the first resonance when an electrical signal is fed into the second feed circuit 230 (at the same time, it can also suppress the current transmission to the second feed circuit 230 when the radiator 210 generates the first resonance), thereby improving the isolation between the first sub-antenna and the second sub-antenna in the resonant frequency band of the first resonance.

[0241] In one embodiment, at the resonant point of the second resonance, the electric field generated by the radiator 210 exhibits a first polarization in the first region 231. At the resonant point of the third resonance, the electric field generated by the radiator 210 exhibits a second polarization in the first region 231. The first and second polarizations are orthogonal. This orthogonality can be understood as the electric field of the first polarization being orthogonal to the electric field of the second polarization in the far-field integral.

[0242] It should be understood that at the resonance point of the second resonance, the currents on the radiator 210 are in the same direction in the first region 231, and this current distribution can generate an electric field with the first polarization. At the resonance point of the third resonance, the currents on the radiator 210 are in the opposite direction in the first region 231, and this current distribution can generate an electric field with the second polarization. Since the first region 231 includes the second feeding point 212, when the radiator 210 generates the third resonance, the first region 231 has a strong current, and moreover, the electric fields generated by the second resonance and the third resonance in the first region 231 are orthogonally polarized. Therefore, the first sub-antenna and the second sub-antenna have good isolation in the first frequency band.

[0243] In one embodiment, the first polarization is horizontal polarization and the second polarization is vertical polarization. In one embodiment, at the resonance point of the first resonance, the electric field generated by the radiator 210 in the first region 231 has the second polarization (vertical polarization).

[0244] In one embodiment, when the distance D between the first feeding point 211 and the second feeding point 212 satisfies: 0 < D ≤ 0.25×L0. In one embodiment, when the distance D between the first feeding point 211 and the second feeding point 212 satisfies: 0 < D ≤ 0.125×L0. In one embodiment, when the distance D between the first feeding point 211 and the second feeding point 212 satisfies: 1 mm ≤ D ≤ 5 mm.

[0245] It should be understood that the first feeding point 211 and the second feeding point 212 are close to each other. When the radiator 210 generates the second resonance and the third resonance, the first region has strong currents. Since the first region has strong currents both in the second resonance and the third resonance, correspondingly, the electric fields generated by the second resonance and the third resonance of the radiator 210 have more orthogonal components, and the first sub-antenna and the second sub-antenna have better isolation in the first frequency band.

[0246] For the sake of brevity in discussion, the parts of the antenna 200 in the electronic device 100 shown in FIG. 18 that are similar to those of the antenna 200 in the electronic devices 100 shown in FIGS. 4, 7, and 8 will not be described in detail one by one. For example, the similar parts include: the position of the radiator 210; the type (lumped element or distributed element) and value range of the first capacitor 221; the relative relationship and adjustment method of the resonance point frequency f2 of the second resonance (or the resonance point frequency f3 of the third resonance) and the resonance point frequency f1 of the first resonance; and so on.

[0247] Figures 22 to 25 show the simulation results of the antenna 200 in the electronic device 100 shown in Figure 18. Figure 22 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 18. Figure 23 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 18 at the first resonance point. Figure 24 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 18 at the second resonance point. Figure 25 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 18 at the third resonance point.

[0248] As shown in Figure 22, the first sub-antenna (S11) resonates near 2.17 GHz and 7.8 GHz. The resonance near 2.17 GHz corresponds to the first resonance in the above embodiment. The resonance near 7.8 GHz corresponds to the second resonance in the above embodiment.

[0249] The second sub-antenna (S22) resonates near 7.8 GHz, which can be the third resonance in the above embodiment.

[0250] With S11 / S22 < -3dB as the boundary, the resonant frequency bands of both the second and third resonants include 7.6GHz-8GHz. Within this frequency band, the first and second sub-antennas have good isolation (S12 / S21), with an isolation greater than 16dB.

[0251] As shown in Figure 23, at the resonant point of the first resonance (e.g., 2.17 GHz), the currents on the radiator 210 are in the same direction, and the electric field generated by the first resonance in the first region 231 is vertically polarized.

[0252] As shown in Figure 24, at the resonant point of the second resonance (e.g., 7.8 GHz), the current on the radiator 210 is in the same direction in the first region 231, and this current distribution in the first region 231 generates a horizontally polarized electric field.

[0253] As shown in Figure 25, at the resonant point of the third resonance (e.g., 7.8 GHz), the current on the radiator 210 reverses in the first region 231, and this current distribution in the first region 231 generates a vertically polarized electric field.

[0254] Figure 26 is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0255] As shown in Figure 26, the electronic device 100 includes an antenna 200 and a floor 300.

[0256] The antenna 200 includes a radiator 210, a first capacitor 221, a first feeding circuit 220, and a second feeding circuit 230.

[0257] At least a portion of the radiator 210 is spaced apart from the floor 300. The radiator 210 includes a first feed point 211 and a second feed point 212. The distance L1 between the first feed point 211 and the center of the radiator 210 satisfies: 0.125 × L0 ≤ L1 ≤ 0.375 × L0. The distance L2 between the second feed point 212 and the center of the radiator 210 satisfies: L2 ≤ 0.125 × L0, where L0 is the length of the radiator. In one embodiment, both ends of the radiator 210 are grounded terminals, and the first and second ends of the radiator 210 are coupled to the floor 300.

[0258] It should be understood that when the first feed point 211 and the second feed point 212 are within the above range, the radiator 210 can be better excited to resonate when electrical signals are fed into the first feed point 211 and the second feed point 212.

[0259] The first feed circuit 220 is coupled to the first feed point 211. The first end of the first capacitor 221 is coupled to the second feed point 212. The second end of the first capacitor 221 is coupled to the second feed circuit 230, and the second end of the first capacitor 221 is coupled to the ground plane 300.

[0260] Radiator 210 and first feed circuit 220 are used to generate a first resonance and a second resonance, the resonant frequency of the first resonance being lower than the resonant frequency of the second resonance. Radiator 210 and second feed circuit 230 are used to generate a third resonance. The resonant frequency bands of both the second and third resonances include the first frequency band. The first resonance may include the second frequency band.

[0261] In one embodiment, the second frequency band includes the 2.4 GHz band (2.4 GHz - 2.4835 GHz) or BT (2.4 GHz - 2.4835 GHz) in Wi-Fi. The first frequency band includes the 5 GHz band (5.15 GHz - 5.25 GHz) in Wi-Fi. In one embodiment, the second frequency band includes the N78 band (3300 MHz - 3800 MHz). The first frequency band includes at least a portion of the frequency bands in UWB.

[0262] It should be understood that, for the sake of brevity, this application embodiment only uses the first frequency band and the second frequency band, which include the above-mentioned communication frequency bands, as an example for illustration. In actual production or application, other communication frequency bands may also be included.

[0263] The first feed circuit 220 and the radiator 210 can form a first sub-antenna, and the second feed circuit 230 and the radiator 210 can form a second sub-antenna.

[0264] It should be understood that the difference between the antenna 200 in the electronic device 100 shown in Figure 26 and the antenna 200 in the electronic device 100 shown in Figures 2, 6 to 10 lies only in the boundary conditions of the radiator 210.

[0265] In the electronic device 100 shown in Figures 2, 6 to 10, both ends of the radiator 210 are open. The radiator 210 is a wire antenna structure. The first resonance can be generated by the half-wavelength mode of the wire antenna. The second resonance can be generated by the full-wavelength mode of the wire antenna. The third resonance can be generated by a similar full-wavelength mode of the wire antenna.

[0266] In the electronic device 100 shown in Figure 26, both ends of the radiator 210 are grounded. The radiator 210 is a slot antenna structure. The first resonance can be generated by the half-wavelength mode of the slot antenna. The second resonance can be generated by the full-wavelength mode of the slot antenna. The third resonance can be generated by a similar full-wavelength mode of the slot antenna. Similar to the antenna 200 in the electronic device 100 shown in Figures 2, 6 to 10, in the electronic device 100 shown in Figure 26, both the first and second sub-antennas have good radiation characteristics in the first frequency band. Furthermore, since both the first and second sub-antennas reuse the radiator 210, more antennas can be placed in a smaller layout space, thereby increasing the data transmission rate of the electronic device 100.

[0267] In one embodiment, at the resonant point of the first resonance, the currents on the radiator 210 reverse on both sides of the center, as shown in Figure 27.

[0268] It should be understood that when both ends of the radiator 210 are grounded, and the first feed circuit 220 feeds in an electrical signal, since the distance L1 between the first feed point 211 and the center of the radiator 210 satisfies the above proportional relationship, the first resonance can be generated by the half-wavelength mode of the radiator 210, and the current on the radiator 210 is reversed on both sides of the center.

[0269] In one embodiment, at the resonant point of the second resonance, the current on the radiator 210 is in the same direction in the first region 231, as shown in FIG28.

[0270] In one embodiment, at the resonant point of the third resonance, the current on the radiator 210 is reversed in the first region 231, which includes the second feed point 212, as shown in FIG29.

[0271] It should be understood that when both ends of the radiator 210 are grounded, since the distance L1 between the first feed point 211 and the center of the radiator 210 satisfies the above-mentioned proportional relationship, when the first feed circuit 220 feeds in an electrical signal, the second resonance can be generated by the wavelength mode of the radiator 210. At the resonance point of the second resonance, the current on the radiator 210 is in the same direction in the first region 231.

[0272] When both ends of the radiator 210 are grounded, and an electrical signal is fed into the second feed circuit 230, the third resonance can be generated by a similar wavelength mode of the radiator 210 because the distance L2 between the second feed point 212 and the center of the radiator 210 satisfies the aforementioned proportional relationship. Since the second end of the first capacitor 221 is coupled to the ground plane 300, the current on the radiator 210 reverses on both sides of the second feed point 212 when an electrical signal is fed into the second feed circuit 230. Correspondingly, at the resonant point of the third resonance, the current on the radiator 210 reverses in the first region 231.

[0273] Furthermore, since a first capacitor 221 is coupled between the second feed circuit 230 and the second feed point 212, the first capacitor 221 can prevent the radiator 210 from generating a resonance similar to the first resonance when an electrical signal is fed into the second feed circuit 230 (at the same time, it can also suppress the current transmission to the second feed circuit 230 when the radiator 210 generates the first resonance), thereby improving the isolation between the first sub-antenna and the second sub-antenna in the resonant frequency band of the first resonance.

[0274] In one embodiment, at the resonant point of the second resonance, the electric field generated by the radiator 210 exhibits a first polarization in the first region 231. At the resonant point of the third resonance, the electric field generated by the radiator 210 exhibits a second polarization in the first region 231. The first and second polarizations are orthogonal. This orthogonality can be understood as the electric field of the first polarization being orthogonal to the electric field of the second polarization in the far-field integral.

[0275] It should be understood that at the resonant point of the second resonance, the current on the radiator 210 is in the same direction in the first region 231, and this current distribution can generate a first-polarized electric field. At the resonant point of the third resonance, the current on the radiator 210 is in the opposite direction in the first region 231, and this current distribution can generate a second-polarized electric field. Since the first region 231 includes the second feed point 212, when the radiator 210 generates the third resonance, the first region 231 has a strong current, and the electric fields generated by the second resonance and the third resonance in the first region 231 are orthogonally polarized. Therefore, the first sub-antenna and the second sub-antenna have good isolation in the first frequency band.

[0276] In one embodiment, the first polarization is horizontal polarization, and the second polarization is vertical polarization. In one embodiment, at the resonant point of the first resonance, the electric field generated by the radiator 210 in the first region 231 exhibits the second polarization (vertical polarization).

[0277] In one embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: D ≥ 0.125 × L0. In one embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: D ≤ 0.5 × L0. In one embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: 5 mm ≤ D. In one embodiment, the distance D between the first feed point 211 and the second feed point 212 satisfies: D ≤ 15 mm.

[0278] It should be understood that when the first feed point 211 and the second feed point 212 are within the aforementioned range, the first sub-antenna and the second sub-antenna have better radiation characteristics in the first frequency band. Furthermore, the first region has a stronger current at both the second and third resonances, and the electric fields generated by the radiator 210 at both the second and third resonances have more orthogonal components, resulting in better isolation between the first and second sub-antennas in the first frequency band.

[0279] For the sake of brevity, the parts of the antenna 200 in the electronic device 100 shown in Figure 26 that are similar to those in the antennas 200 in the electronic devices 100 shown in Figures 4, 7 and 8 will not be described in detail. For example, similar parts include: the position of the radiator 210; the type (lumped element or distributed element) and value range of the first capacitor 221; the relative relationship and adjustment method between the resonant frequency f2 of the second resonance (or the resonant frequency f3 of the third resonance) and the resonant frequency f1 of the first resonance; and so on.

[0280] Figures 30 to 33 show the simulation results of the antenna 200 in the electronic device 100 shown in Figure 26. Figure 30 shows the simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown in Figure 26. Figure 31 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 26 at the first resonance point. Figure 32 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 26 at the second resonance point. Figure 33 is a schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 shown in Figure 26 at the third resonance point.

[0281] As shown in Figure 30, the first sub-antenna (S11) resonates near 2.4 GHz and 5.8 GHz. The resonance near 2.4 GHz corresponds to the first resonance in the above embodiment. The resonance near 5.8 GHz corresponds to the second resonance in the above embodiment.

[0282] The second sub-antenna (S22) resonates near 5.8 GHz, which can be the third resonance in the above embodiment.

[0283] With S11 / S22 < -3dB as the boundary, the resonant frequency bands of both the second and third resonants include 5.7GHz-6GHz. Within this frequency band, the first and second sub-antennas have good isolation (S12 / S21), with an isolation greater than 14dB.

[0284] As shown in Figure 31, at the resonant point of the first resonance (e.g., 2.4 GHz), the currents on the radiator 210 are in the same direction, and the electric field generated by the first resonance in the first region 231 is vertically polarized.

[0285] As shown in Figure 32, at the resonant point of the second resonance (e.g., 5.8 GHz), the current on the radiator 210 is in the same direction in the first region 231, and this current distribution in the first region 231 generates a horizontally polarized electric field.

[0286] As shown in Figure 33, at the resonant point of the third resonance (e.g., 5.8 GHz), the current on the radiator 210 reverses in the first region 231, and this current distribution in the first region 231 generates a vertically polarized electric field.

[0287] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

An electronic device, characterized by comprising: The electronic device comprises: a floor; an antenna, the antenna comprising: a radiator, the first end and the second end of the radiator being open ends, at least part of the radiator being spaced apart from the floor, the radiator comprising a first feed point and a second feed point, the distance L1 between the first feed point and the center of the radiator satisfying: 0.125×L0≤L1≤0.375×L0, the distance L2 between the second feed point and the center of the radiator satisfying: 0.125×L0≤L2≤0.375×L0, wherein L0 is the length of the radiator, the length of the radiator on both sides of the center of the radiator being the same, a first feed circuit coupled with the first feed point, a first capacitor and a second feed circuit, the first end of the first capacitor being coupled with the second feed point, the second end of the first capacitor being coupled with the second feed circuit, the second end of the first capacitor being coupled with the floor; wherein the radiator and the first feed circuit are used to generate a first resonance and a second resonance, the resonance point frequency of the first resonance being lower than the resonance point frequency of the second resonance; the radiator and the second feed circuit are used to generate a third resonance, the resonance frequency band of the second resonance and the resonance frequency band of the third resonance both comprising a first frequency band. The electronic device according to claim 1, wherein the distance D between the first feed point and the second feed point satisfies: D≤0.25×L0. The electronic device according to claim 1 or 2, wherein the distance D between the first feed point and the second feed point satisfies: 1mm≤D≤5mm. The electronic device according to any one of claims 1 to 3, wherein the equivalent capacitance value of the first capacitor is greater than or equal to 0.1pF and less than or equal to 3pF. The electronic device according to any one of claims 1 to 4, wherein the antenna further comprises a feed piece, the feed piece being opposite to and not in contact with the second feed point, the feed piece being coupled with the second feed circuit, and the equivalent capacitance formed between the feed piece and the radiator serving as the first capacitor. The electronic device according to any one of claims 1 to 5, wherein at the resonance point of the second resonance, the currents of the radiator in a first region are in the same direction, the first region comprising the second feed point, and / or at the resonance point of the third resonance, the currents of the radiator in the first region are in opposite directions. The electronic device according to any one of claims 1 to 6, wherein at the resonance point of the second resonance, the electric field generated by the radiator in a first region is in a first polarization, the first region comprising the second feed point, and / or at the resonance point of the third resonance, the electric field generated by the radiator in the first region is in a second polarization, the first polarization and the second polarization being orthogonal. The electronic device according to any one of claims 1 to 7, wherein The resonance point f1 of the first resonance and the resonance point f2 of the second resonance satisfy: 1.5 x f1 ≤ f2 ≤ 2.5 x f1. The electronic device according to any one of claims 1 to 8, wherein The antenna further comprises a second capacitor and a third feeding circuit, and the radiator further comprises a third feeding point, a first end of the second capacitor is coupled with the third feeding point, a second end of the second capacitor is coupled with the third feeding circuit, and the second end of the second capacitor is coupled with the ground plate. The second feeding point and the third feeding point are located on two sides of the center of the radiator respectively, and a distance L3 between the third feeding point and the center of the radiator satisfies: 0.125 x L0 ≤ L3 ≤ 0.375 x L0, The radiator and the third feeding circuit are configured to generate a fourth resonance, and a resonance frequency band of the fourth resonance comprises the first frequency band. The electronic device according to claim 9, wherein At the resonance point of the second resonance, the current of the radiator in a second region is in the same direction, the second region comprises the third feeding point, and / or At the resonance point of the third resonance, the current of the radiator in the second region is in the same direction, and / or At the resonance point of the fourth resonance, the current of the radiator in the second region is in the opposite direction. The electronic device according to any one of claims 1 to 10, wherein The electronic device further comprises a bracket or a back cover, and the first radiator is located on a surface of the bracket or a surface of the back cover. An electronic device, characterized by comprising: Comprise: a ground plate; an antenna, the antenna comprising: a radiator, a first end and a second end of the radiator being open ends, at least a part of the radiator being spaced apart from the ground plate, the radiator comprising a first feeding point and a second feeding point, a distance L1 between the first feeding point and the center of the radiator satisfying: L1 ≤ 0.25 x L0, a distance L2 between the second feeding point and the center of the radiator satisfying: L2 ≤ 0.25 x L0, wherein L0 is the length of the radiator, the length of the radiator on two sides of the center of the radiator being the same, a first feeding circuit, the first feeding circuit being coupled with the first feeding point, a first capacitor and a second feeding circuit, a first end of the first capacitor being coupled with the second feeding point, a second end of the first capacitor being coupled with the second feeding circuit, and the second end of the first capacitor being coupled with the ground plate; wherein the radiator and the first feeding circuit are configured to generate a first resonance and a second resonance, and a resonance point frequency of the first resonance is lower than a resonance point frequency of the second resonance; the radiator and the second feeding circuit are configured to generate a third resonance, and a resonance frequency band of the second resonance and a resonance frequency band of the third resonance both comprise a first frequency band. The electronic device according to claim 12, wherein a distance D between the first feeding point and the second feeding point satisfies: 0 < D ≤ 0.125 x L0. The electronic device according to claim 12 or 13, wherein The distance D between the first feeding point and the second feeding point satisfies: 1mm≤D≤5mm. The electronic device according to any one of claims 12 to 14, wherein, An equivalent capacitance value of the first capacitor is greater than or equal to 0.1pF and less than or equal to 3pF. The electronic device according to any one of claims 12 to 15, wherein, The antenna further comprises a feeding member opposite to and not in contact with the second feeding point, the feeding member is coupled with the second feeding circuit, and an equivalent capacitance formed between the feeding member and the radiator serves as the first capacitor. The electronic device according to any one of claims 12 to 16, wherein, At a resonance point of the second resonance, currents of the radiator in a first region including the second feeding point are in the same direction, and / or At a resonance point of the third resonance, currents of the radiator in the first region are in opposite directions. The electronic device according to any one of claims 12 to 17, wherein, At a resonance point of the second resonance, an electric field generated by the radiator in a first region including the second feeding point is in a first polarization, and / or At a resonance point of the third resonance, an electric field generated by the radiator in the first region is in a second polarization, the first polarization and the second polarization being orthogonal. The electronic device according to any one of claims 12 to 18, wherein, A resonance point f1 of the first resonance and a resonance point f2 of the second resonance satisfy: 1.5×f1≤f2≤2.5×f1. The electronic device according to any one of claims 12 to 19, wherein, The electronic device further comprises a bracket or a back cover, and the first radiator is located on a surface of the bracket or a surface of the back cover. An electronic device, characterized by comprising: Comprising: a floor; an antenna, the antenna comprising: a radiator, first and second ends of the radiator being ground ends, at least part of the radiator being spaced apart from the floor, the radiator comprising a first feeding point and a second feeding point, a distance L1 between the first feeding point and a center of the radiator satisfying: 0.125×L0≤L1≤0.375×L0, a distance L2 between the second feeding point and the center of the radiator satisfying: L2≤0.125×L0, wherein L0 is a length of the radiator, and lengths of the radiator on both sides of the center of the radiator are the same, a first feeding circuit coupled with the first feeding point, a first capacitor and a second feeding circuit, the radiator further comprising a second feeding point, a first end of the first capacitor being coupled with the second feeding point, a second end of the first capacitor being coupled with the second feeding circuit, and the second end of the first capacitor being coupled with the floor; wherein the radiator and the first feeding circuit are used to generate a first resonance and a second resonance, a resonance point frequency of the first resonance being lower than a resonance point frequency of the second resonance. The radiator and the second feeding circuit are configured to generate a third resonance, and a resonance frequency band of the second resonance and a resonance frequency band of the third resonance both include a first frequency band. The electronic device of claim 21, wherein A distance D between the first feeding point and the second feeding point satisfies: 0.125×L0≤D≤0.5×L0. The electronic device of claim 21 or 22, wherein A distance D between the first feeding point and the second feeding point satisfies: 5mm≤D≤15mm. The electronic device of any one of claims 21 to 23, wherein An equivalent capacitance value of the first capacitance is greater than or equal to 0.1 pF and less than or equal to 3 pF. The electronic device of any one of claims 21 to 24, wherein The antenna further includes a feeding member opposite to and not in contact with the second feeding point, the feeding member is coupled with the second feeding circuit, and an equivalent capacitance formed between the feeding member and the radiator serves as the first capacitance. The electronic device of any one of claims 21 to 25, wherein At a resonance point of the second resonance, currents of the radiator in a first region including the second feeding point are in the same direction, and / or At a resonance point of the third resonance, currents of the radiator in the first region are in opposite directions. The electronic device of any one of claims 21 to 26, wherein At a resonance point of the second resonance, an electric field generated by the radiator in a first region including the second feeding point is in a first polarization, and / or At a resonance point of the third resonance, an electric field generated by the radiator in the first region is in a second polarization, the first polarization and the second polarization being orthogonal. The electronic device of any one of claims 21 to 27, wherein A resonance point f1 of the first resonance and a resonance point f2 of the second resonance satisfy: 1.5×f1≤f2≤2.5×f1. The electronic device of any one of claims 21 to 28, wherein The electronic device further includes a bracket or a back cover, and the first radiator is located on a surface of the bracket or a surface of the back cover.

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