Electronic equipment

Abstract

The invention provides electronic equipment. The electronic equipment comprises an antenna. The antenna comprises a radiator, a first capacitor, a first feed circuit and a second feed circuit. According to the antenna, a first feed circuit and a 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, so that the electronic equipment has more antennas in a smaller layout space, and the data transmission rate of the electronic equipment is increased. Meanwhile, 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 with the floor, so that the first capacitor can improve the isolation degree of the first sub-antenna and the second sub-antenna in the first frequency band, and the first sub-antenna and the second sub-antenna both have good radiation characteristics in the first frequency band.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wireless communication, and in particular to an electronic device. BACKGROUND

[0002] With the rapid development of wireless communication technology, the requirement for transmission speed is constantly increasing, which accelerates the rapid development of sub-6GHz multi-input multi-output (MIMO) antenna systems. The sub-6GHz MIMO antenna system can arrange a large number of antennas at the base station end and the terminal, and simultaneously transmit data through multiple channels in the same time domain and frequency domain, which can effectively improve the spectrum efficiency and greatly improve the data transmission speed. Therefore, it has become one of the development priorities of communication systems.

[0003] However, as the layout inside the electronic device becomes more and more compact, when several antennas operating in the same frequency band are designed together in a terminal device with limited space, the distance between the antennas is too close, the interference between the antennas becomes larger and larger, the isolation between the antennas becomes poor, and the user's use is inconvenient. SUMMARY

[0004] The present application provides an electronic device, which includes an antenna. The antenna forms a first sub-antenna and a second sub-antenna by a first feeding circuit and a second feeding circuit respectively, and the first sub-antenna and the second sub-antenna have good isolation.

[0005] In a first aspect, an electronic device is provided, comprising: 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 disposed in a spaced apart manner with the floor, the radiator comprising a first feed point and a second feed point, a distance L1 between the first feed point and a center of the radiator satisfying: 0.125×L0≤L1≤0.375×L0, a distance L2 between the second feed point and the center of the radiator satisfying: 0.125×L0≤L2≤0.375×L0, wherein L0 is a 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, the first feed circuit being coupled with the first feed point, a first capacitor and a second feed circuit, the radiator further comprising a second feed point, a first end of the first capacitor being coupled with the second feed point, a 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 configured 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 feed circuit are configured to generate a third resonance, a resonance frequency band of the second resonance and a resonance frequency band of the third resonance both comprising a first frequency band.

[0006] According to embodiments of the present application, the first feed circuit and the radiator can form a first sub antenna, and the second feed circuit and the radiator can form a second sub antenna. The first sub antenna and the second sub antenna share the radiator, which can enable the electronic device to have more antennas in a smaller layout space, thereby increasing the data transmission rate of the electronic device.

[0007] 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 with the floor, the first capacitor can improve the isolation of the first sub antenna and the second sub antenna in the first frequency band, so that the first sub antenna and the second sub antenna both have good radiation characteristics in the first frequency band.

[0008] In addition, the first sub antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance can comprise a second frequency band. The second frequency band can comprise other communication frequency bands, thereby expanding the working frequency band of the first sub antenna, so that the antenna can work in more communication frequency bands.

[0009] In combination with the first aspect, in some implementations of the first aspect, a distance D between the first feed point and the second feed point satisfies: D≤0.25×L0.

[0010] According to the embodiment of the present application, the first feeding point and the second feeding point can be located on the same side of the center of the radiator. Since the first feeding point and the second feeding point are located on the same side of the center of the radiator, the first region has a stronger current when the second resonance and the third resonance are generated. Since the first region has a stronger current when the second resonance and the third resonance are generated, the corresponding electric field generated by the second resonance and the third resonance of the radiator has more orthogonal components, and the first sub-antenna and the second sub-antenna have better isolation in the first frequency band.

[0011] In some implementations of the first aspect, the distance D between the first feeding point and the second feeding point satisfies: 1mm≤D≤5mm.

[0012] According to the embodiment of the present application, as the first feeding point and the second feeding point are close to each other, the current of the first region of the radiator is stronger when the second resonance and the third resonance are generated, and the electric field generated by the second resonance and the third resonance of the radiator has more orthogonal components, and the first sub-antenna and the second sub-antenna have better isolation in the first frequency band.

[0013] In some implementations of the first aspect, the equivalent capacitance value of the first capacitance is greater than or equal to 0.1pF and less than or equal to 3pF.

[0014] According to the embodiment of the present application, the first capacitance can be used to prevent the radiator from generating a resonance similar to the first resonance when the second feeding circuit feeds in an electric signal (at the same time, the current of the radiator when generating the first resonance can also be suppressed from being transmitted to the second feeding circuit). Therefore, the equivalent capacitance value of the first capacitance can be determined according to the resonance point frequency of the first resonance.

[0015] In some implementations of the first aspect, the antenna further includes a feeding member, the feeding member is opposite to and does not contact 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.

[0016] According to the embodiment of the present application, the first capacitance can be a lumped element, and the first capacitance can also be a distributed element.

[0017] In some implementations of the first aspect, at the resonance point of the second resonance, the currents of the first region of the radiator are in the same direction, the first region includes the second feeding point, and / or at the resonance point of the third resonance, the currents of the first region of the radiator are in opposite directions.

[0018] According to the embodiment of the present application, when both ends of the radiator are open ends, the first feeding circuit feeds in an electric signal, and due to the distance L2 between the second feeding point and the center of the radiator satisfying the above proportion relationship, the second resonance can be generated by a one-wavelength mode of the radiator, and the current on the radiator reverses on both sides of the center. Correspondingly, at the resonance point of the second resonance, the current on the radiator is the same in the first region.

[0019] When both ends of the radiator are open ends, the second feeding circuit feeds in an electric signal, and the third resonance can be generated by a one-wavelength mode of the radiator. Due to the second end of the first capacitor being coupled to the ground plate, when the second feeding circuit feeds in an electric signal, the current on the radiator reverses on both sides of the second feeding point. Correspondingly, at the resonance point of the third resonance, the current on the radiator reverses in the first region.

[0020] In combination with the first aspect, in some implementations of the first aspect, at the resonance point of the second resonance, the electric field generated by the radiator has a first polarization in the first region, the first region includes the second feeding point, and / or, at the resonance point of the third resonance, the electric field generated by the radiator has a second polarization in the first region, the first polarization and the second polarization are orthogonal.

[0021] According to the embodiment of the present application, at the resonance point of the second resonance, the current on the radiator is the same in the first region, and this current distribution can generate an electric field of a first polarization. At the resonance point of the third resonance, the current on the radiator reverses in the first region, and this current distribution can generate an electric field of a second polarization. Since the first region includes the second feeding point, the first region has a strong current when the radiator generates the third resonance, and the electric field generated by the first region by the second resonance and the electric field generated by the third resonance are polarized orthogonally, so the first sub-antenna and the second sub-antenna have good isolation in the first frequency band.

[0022] In combination with the first aspect, in some implementations of the first aspect, the resonance point f1 of the first resonance and the resonance point f2 of the second resonance satisfy: 1.5×f1≤f2≤2.5×f1.

[0023] According to the embodiment of the present application, in actual production or design, the radiation characteristics of the first sub-antenna in the resonance frequency band of the first resonance and the resonance frequency band of the second resonance can also be adjusted by other means, for example, elements are arranged on the radiator, a tuning circuit is coupled to the radiator, and the like, which will not be repeated here.

[0024] With reference to 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 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; wherein 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, and the radiator and the third feeding circuit are configured to generate a fourth resonance, and a resonance frequency band of the fourth resonance includes the first frequency band.

[0025] According to the embodiments of the present application, the third feeding circuit and the radiator can form a third sub antenna. The first sub antenna, the second sub antenna and the third sub antenna can include the same operating frequency band, and all serve as sub units in the MIMO antenna system to improve the data transmission rate of the electronic device.

[0026] Meanwhile, since the first capacitor and the second capacitor are arranged, the isolation of the first sub antenna, the second sub antenna and the third sub antenna in the first frequency band can be improved, and the first sub antenna and the second sub antenna both have good radiation characteristics in the first frequency band.

[0027] With reference to the first aspect, in some implementations of the first aspect, at a resonance point of the second resonance, the current of the radiator in the second region is in the same direction, the second region includes the third feeding point, and / or at a resonance point of the third resonance, the current of the radiator in the second region is in the same direction, and / or at a resonance point of the fourth resonance, the current of the radiator in the second region is in the opposite direction.

[0028] With reference to the first aspect, in some implementations of the first aspect, 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.

[0029] In a second aspect, an electronic device is provided, comprising: 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 disposed apart from the floor, the radiator comprising a first feed point and a second feed point, a distance L1 between the first feed point and a center of the radiator satisfying: L1≤0.25×L0, a distance L2 between the second feed point and the center of the radiator satisfying: L2≤0.25×L0, wherein L0 is a 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, the first feed circuit being coupled with the first feed point, a first capacitor and a second feed circuit, the radiator further comprising a second feed point, a first end of the first capacitor being coupled with the second feed point, a 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 configured 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 feed circuit are configured to generate a third resonance, a resonance frequency band of the second resonance and a resonance frequency band of the third resonance both comprising a first frequency band.

[0030] According to embodiments of the present application, the first feed circuit and the radiator can form a first sub antenna, and the second feed circuit and the radiator can form a second sub antenna. The first sub antenna and the second sub antenna share the radiator, which can enable the electronic device to have more antennas in a smaller layout space, so as to increase the data transmission rate of the electronic device.

[0031] 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 with the floor, the first capacitor can improve the isolation of the first sub antenna and the second sub antenna in the first frequency band, so that the first sub antenna and the second sub antenna both have good radiation characteristics in the first frequency band.

[0032] In addition, the first sub antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance can comprise a second frequency band. The second frequency band can comprise other communication frequency bands, so as to expand the working frequency band of the first sub antenna, so that the antenna can work in more communication frequency bands.

[0033] In combination with the second aspect, in some implementations of the second aspect, a distance D between the first feed point and the second feed point satisfies: 0<D≤0.125×L0.

[0034] In combination with the second aspect, in some implementations of the second aspect, a distance D between the first feed point and the second feed point satisfies: 1mm≤D≤5mm.

[0035] With reference to the second aspect, in some implementations of the second aspect, 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.

[0036] With reference to the second aspect, in some implementations of the second aspect, the antenna further includes a feed, the feed being opposite to and not in contact with the second feed point, the feed being coupled with the second feed circuit, and an equivalent capacitance formed between the feed and the radiator serving as the first capacitance.

[0037] With reference to the second aspect, in some implementations of the second aspect, at a resonance point of the second resonance, currents of the radiator in a first region are in the same direction, the first region including the second feed point, and / or at a resonance point of the third resonance, currents of the radiator in the first region are in opposite directions.

[0038] With reference to the second aspect, in some implementations of the second aspect, at a resonance point of the second resonance, an electric field generated by the radiator in a first region is of a first polarization, the first region including the second feed point, and / or at a resonance point of the third resonance, an electric field generated by the radiator in the first region is of a second polarization, the first polarization and the second polarization being orthogonal.

[0039] With reference to the second aspect, in some implementations of the second aspect, a resonance point f1 of the first resonance and a resonance point f2 of the second resonance satisfy: 1.5 x f1≤ f2≤ 2.5 x f1.

[0040] With reference to the second aspect, in some implementations of the second aspect, the electronic device further includes a bracket or a back cover, the first radiator being located on a surface of the bracket or a surface of the back cover.

[0041] In a third aspect, an electronic device is provided, 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 disposed apart from the floor, the radiator comprising a first feed point and a second feed point, a distance L1 between the first feed point and a center of the radiator satisfying: 0.125*L0<=L1<=0.375*L0, a distance L2 between the second feed point and the center of the radiator satisfying: L2<=0.125*L0, wherein L0 is a 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 radiator further comprising a second feed point, a first end of the first capacitor being coupled with the second feed point, a 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 configured 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 feed circuit are configured to generate a third resonance, a resonance frequency band of the second resonance and a resonance frequency band of the third resonance both comprising a first frequency band.

[0042] According to embodiments of the present application, the first feed circuit and the radiator can form a first sub antenna, and the second feed circuit and the radiator can form a second sub antenna. The first sub antenna and the second sub antenna share the radiator, which can enable the electronic device to have more antennas in a smaller layout space, so as to increase the data transmission rate of the electronic device.

[0043] 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 with the floor, the first capacitor can improve the isolation of the first sub antenna and the second sub antenna in the first frequency band, so that the first sub antenna and the second sub antenna both have good radiation characteristics in the first frequency band.

[0044] In addition, the first sub antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance can comprise a second frequency band. The second frequency band can comprise other communication frequency bands, so as to expand the working frequency band of the first sub antenna, so that the antenna can work in more communication frequency bands.

[0045] In combination with the third aspect, in some implementations of the third aspect, a distance D between the first feed point and the second feed point satisfies: 0.125*L0<=D<=0.5*L0.

[0046] In combination with the third aspect, in some implementations of the third aspect, a distance D between the first feed point and the second feed point satisfies: 5mm<=D<=15mm.

[0047] In some embodiments of the third aspect, the equivalent capacitance value of the first capacitance is greater than or equal to 0.1 pF and less than or equal to 3 pF.

[0048] In some embodiments of the third aspect, 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.

[0049] In some embodiments of the third aspect, 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.

[0050] In some embodiments of the third aspect, 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.

[0051] In some embodiments of the third aspect, a resonance point f1 of the first resonance and a resonance point f2 of the second resonance satisfy: 1.5 x f1 ≤ f2 ≤ 2.5 x f1.

[0052] In some embodiments of the third aspect, 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. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 FIG. 1 is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0054] Figure 2 FIG. 1 is a schematic diagram of an electronic device 100 provided by an embodiment of the present application.

[0055] Figure 3 FIG. 2 is a schematic diagram of a current distribution of the antenna 200 at a resonance point of the first resonance provided by an embodiment of the present application.

[0056] Figure 4 FIG. 2 is a schematic diagram of a current distribution of the antenna 200 at a resonance point of the first resonance provided by an embodiment of the present application.

[0057] Figure 5 FIG. 2 is a schematic diagram of a current distribution of the antenna 200 at a resonance point of the first resonance provided by an embodiment of the present application.

[0058] Figure 6 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0059] Figure 7 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0060] Figure 8 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0061] Figure 9 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0062] Figure 10 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0063] Figure 11 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0064] Figure 12 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0065] Figure 13 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0066] Figure 14 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0067] Figure 15 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0068] Figure 16 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0069] Figure 17 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application. Figure 15 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0070] Figure 18 FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present application.

[0071] Figure 19This is a schematic diagram of the current distribution at the first resonance point of the antenna 200 provided in the embodiment of this application.

[0072] Figure 20 This is a schematic diagram of the current distribution at the resonant point of the second resonance of the antenna 200 provided in the embodiment of this application.

[0073] Figure 21 This 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.

[0074] Figure 22 yes Figure 18 Simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown.

[0075] Figure 23 yes Figure 18 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the first resonance.

[0076] Figure 24 yes Figure 18 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the second resonance.

[0077] Figure 25 yes Figure 18 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the third resonance.

[0078] Figure 26 This is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0079] Figure 27 This is a schematic diagram of the current distribution at the first resonance point of the antenna 200 provided in the embodiment of this application.

[0080] Figure 28 This is a schematic diagram of the current distribution at the resonant point of the second resonance of the antenna 200 provided in the embodiment of this application.

[0081] Figure 29 This 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.

[0082] Figure 30 yes Figure 26 Simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown.

[0083] Figure 31 yes Figure 26 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the first resonance.

[0084] Figure 32 is Figure 26 is a schematic diagram of an electric field distribution of the antenna 200 in the electronic device 100 at a resonance point of the second resonance.

[0085] Figure 33 is Figure 26 is a schematic diagram of an electric field distribution of the antenna 200 in the electronic device 100 at a resonance point of the third resonance. DETAILED DESCRIPTION

[0086] Hereinafter, terms that can appear in the embodiments of the present application are explained.

[0087] It should be understood that the term "and / or" used herein is only to describe the same field of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0088] "Within the scope of", as used in the present application, by default includes both end values of the range, unless it is indicated separately that the end values are not included, for example, within the range of 1 to 5, both 1 and 5 are included.

[0089] Coupling: can be understood as direct coupling and / or indirect coupling, "coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be referred to as "electrical connection", which means that the components are in physical contact and electrically conductive; it can also be understood as a form of connection between different components in the circuit structure through the signal-transmissible entity lines such as copper foil or wire of the printed circuit board (PCB); "indirect coupling" can be understood as electrical conduction between two conductors through space / non-contact. In an embodiment, indirect coupling can also be referred to as capacitive coupling, for example, through the coupling between the gap between two conductive parts to form an equivalent capacitor to realize signal transmission.

[0090] Element / device: includes at least one of lumped element / device and distributed element / device.

[0091] Lumped element / device: refers to a general term for all elements when the size of the element is much smaller than the relative wavelength of the circuit operating frequency. For a signal, at any time, the element characteristics remain fixed and are independent of frequency. Lumped element / device can include lumped capacitance, lumped inductance, etc.

[0092] distributed element / device: unlike lumped elements, when a signal passes through an element, the characteristics of the element at each point will vary with the signal, and the element as a whole cannot be considered a single body with fixed characteristics, and is therefore referred to as a distributed element. Distributed elements / devices can include distributed capacitance, distributed inductance, etc.

[0093] capacitance: can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes components that exhibit capacitance, such as a capacitor element; distributed capacitance (or distributed capacitance) includes an equivalent capacitance formed by two conductive pieces separated by a gap.

[0094] inductance: can be understood as lumped inductance and / or distributed inductance. Lumped inductance includes components that exhibit inductance, such as an inductor element; distributed inductance (or distributed inductance) includes an equivalent inductance formed by a length of conductive material, such as an equivalent inductance formed by a conductor that is coiled or twisted.

[0095] radiating body: is a device in an antenna that is used to receive / send electromagnetic wave radiation. In some cases, "antenna" is understood in a narrow sense as a radiating body that converts guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiating body via a feed line, which is converted into electromagnetic wave energy of a certain polarization by the radiating body, and is radiated in the desired direction. The receiving radiating body converts electromagnetic wave energy of a certain polarization from a certain direction in space into modulated high-frequency current energy, which is delivered to the input of the receiver via a feed line.

[0096] The radiator can include a conductor with a specific shape and size, such as a line shape, or a patch shape, etc. The application does not limit the specific shape. In an embodiment, the line shape radiator can be referred to as a line antenna. In an embodiment, the line shape radiator can be implemented by a conductive frame, which can also be referred to as a frame antenna. In an embodiment, the line shape radiator can be implemented by a support conductor, which can also be referred to as a support antenna. In an embodiment, the line diameter (e.g., including thickness and width) of the line shape radiator, or the radiator of the line antenna, is much smaller (e.g., less than 1 / 16 of the wavelength) than the wavelength (e.g., the medium wavelength), and the length can be comparable to the wavelength (e.g., the medium wavelength) (e.g., the length is around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of the line antenna include a dipole antenna, a half-wave vibrator antenna, a monopole antenna, a loop antenna, and an inverted F antenna (also referred to as IFA). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feed from the feed end of the radiating branch. For example, the inverted F antenna (IFA) can be regarded as being obtained by adding a ground path to a monopole antenna. The IFA antenna has a feed point and a ground point, and is called an inverted F antenna because its side view is in the shape of an inverted F. In an embodiment, the patch shape radiator can include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also referred to as PIFA). In an embodiment, the patch shape radiator can be implemented by a planar conductor (e.g., a conductive sheet or a conductive coating, etc.). In an embodiment, the patch shape radiator can include a conductive sheet, such as a copper sheet, etc. In an embodiment, the patch shape radiator can include a conductive coating, such as silver paste, etc. The shape of the patch shape radiator includes a circular shape, a rectangular shape, a loop shape, etc. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator, and a ground plate, wherein the dielectric substrate is arranged between the radiator and the ground plate.

[0097] The radiators can also include slots or gaps formed on the conductors, such as closed or semi-closed slots or gaps on the grounded conductor plane. In one embodiment, the radiators with slots or gaps can be referred to as slot antennas or gap antennas. In one embodiment, the slots or gaps of the slot / gap antennas have a radial dimension (e.g., including width) much smaller than the wavelength (e.g., dielectric wavelength) (e.g., less than 1 / 16 of the wavelength), and a length dimension comparable to the wavelength (e.g., dielectric wavelength) (e.g., around 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, the radiators with closed slots or gaps can be referred to as closed slot antennas. In one embodiment, the radiators with semi-closed slots or gaps (e.g., with openings added to the closed slots or gaps) can be referred to as open slot antennas. In some embodiments, the gap shape is long and thin. In some embodiments, the length of the gap is about half of the wavelength (e.g., dielectric wavelength). In some embodiments, the length of the gap is about an integer multiple of the wavelength (e.g., one dielectric wavelength). In some embodiments, the gap can be fed by a transmission line that is connected across one or both sides of the gap, whereby the gap is excited with a radio frequency electromagnetic field and radiates electromagnetic waves into space. In one embodiment, the radiators of the slot / gap antennas can be implemented by conductive frames that are grounded at both ends, which can also be referred to as frame antennas. In this embodiment, the slot / gap antennas can be considered to include linear radiators that are spaced apart from the ground plane and grounded at both ends, thereby forming closed or semi-closed slots or gaps. In one embodiment, the radiators of the slot / gap antennas can be implemented by bracket conductors that are grounded at both ends, which can also be referred to as bracket antennas.

[0098] The feed circuit is a circuit for receiving and / or transmitting radio frequency signals. The feed circuit can include a transceiver and a radio frequency front end circuit. In some cases, the term "feed circuit" is used in a narrow sense to refer to a radio frequency integrated circuit (RFIC), which can be considered to include a radio frequency front end circuit (or radio frequency front end chip) and a transceiver. The feed circuit has the function of converting radio waves (e.g., radio frequency signals) and signals (e.g., digital signals). In general, it is considered to be part of the radio frequency.

[0099] In some embodiments, the electronic device can also include a test seat (or referred to as a radio frequency seat or a radio frequency test seat). The test seat can be used to insert a coaxial cable to test the characteristics of the radio frequency front end circuit or the radiators of the antenna through the cable. The radio frequency front end circuit can be considered to be a circuit portion coupled between the test seat and the transceiver.

[0100] In some embodiments, the radio frequency front-end circuit can be integrated as a radio frequency front-end chip in the electronic device, or the radio frequency front-end circuit and the transceiver can be integrated as a radio frequency chip in the electronic device.

[0101] It should be understood that any two of the first / second / … / Nth feeding circuits in the present application can include the same transceiver, for example, one transmitting channel in one transceiver as the first feeding circuit and one receiving channel in the same transceiver as the second feeding circuit, or for example, the first receiving channel in one transceiver as the first feeding circuit and the second receiving channel in the same transceiver as the second feeding circuit; any two of the first / second / … / Nth feeding circuits in the present application can also include the same radio frequency front-end circuit, for example, signals are processed by the tuning circuit or the amplifier in one radio frequency front-end circuit.

[0102] It should also be understood that any two of the first / second / … / Nth feeding circuits in the present application generally correspond to two radio frequency test seats in the electronic device.

[0103] The matching circuit is a circuit for adjusting the radiation characteristics of the antenna. In one embodiment, the matching circuit is coupled between the feeding circuit and the corresponding radiator. In one embodiment, the matching circuit is coupled between the test seat and the radiator. Generally, the matching circuit is a combination of circuits coupled between the radiator and the ground plane. In one embodiment, the matching circuit can include tuning circuits and / or elements, and the tuning circuit can be an element for switching the coupling connection of the radiator. The matching circuit has the functions of impedance matching and / or frequency tuning. Generally, it is considered as part of the antenna.

[0104] The ground structure / feeding structure can include connectors, such as metal springs, and the radiator is coupled to the ground plane through the ground structure / and the feeding structure is coupled to the feeding circuit. In some embodiments, the feeding structure can include a transmission line / feeding line, and the ground structure can include a ground line.

[0105] End / point: the "end / point" in the first end / second end / feeding end / grounding end / feeding point / grounding point / connection point of the antenna radiator should not be understood as a point or end physically disconnected from other radiators, but can also be considered as a point or a section on a continuous radiator. In one embodiment, the "end / point" can include the connection / coupling area on the antenna radiator that is coupled to other conductive structures, for example, the feeding end / feeding point can be the connection / coupling area (for example, the area facing a part of the feeding circuit) on the antenna radiator that is coupled to the feeding structure or the feeding circuit, and for example, the grounding end / grounding point can be the connection / coupling area (for example, the area facing a part of the grounding circuit) on the antenna radiator that is coupled to the grounding structure or the grounding circuit.

[0106] Open end, closed end: In some embodiments, open end and closed end are for example relative to ground, closed end is grounded, open end is not grounded. In some embodiments, open end and closed end are for example relative to other conductors, closed end is electrically connected to other conductors, open end is not electrically connected to other conductors. In one embodiment, open end can also be referred to as floating end, free end, open end, or open circuit end. In one embodiment, closed end can also be referred to as grounded end, or short circuit end. It should be appreciated that in some embodiments, other conductors can be coupled through open end to transfer coupling energy (which can be understood as transferring current).

[0107] In some embodiments, the understanding of "closed end" can also be from the perspective of current distribution, closed end or grounded end, etc. can be understood as a current large point on the radiator, or as a small point of electric field on the radiator; in one embodiment, coupling electronic devices (e.g. capacitors, inductors, etc.) through the closed end can not change the current distribution characteristics of the current large point / small point of electric field; in one embodiment, opening a slot (e.g. a gap filled with insulating material) at or near the closed end can not change the current distribution characteristics of the current large point / small point of electric field.

[0108] In some embodiments, the understanding of "open end" can also be from the perspective of current distribution, open end or floating end, etc. can be understood as a current small point on the radiator, or as a large point of electric field on the radiator; in one embodiment, coupling electronic devices (e.g. capacitors, inductors, etc.) through the open end can not change the current distribution characteristics of the current small point / large point of electric field.

[0109] It should be appreciated that the radiator end at a gap (from the structure of the radiator, similar to the radiator at the opening of the open end or floating end) coupled with electronic devices (e.g. capacitors, inductors, etc.) can make the radiator end a current large point / small point of electric field, in which case it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0110] The "floating radiator" mentioned in the embodiments of the present application refers to a radiator that is not directly connected to a feed line / branch and / or a ground line / branch, but is fed and / or grounded by indirect coupling.

[0111] It should be appreciated that "floating" in "floating end" and "floating radiator" does not mean that there is no structure around the radiator to support it. In one embodiment, the floating radiator can be for example a radiator arranged on the inner surface of an insulating back cover.

[0112] The current co-directional / counter-directional mentioned in the embodiments of the present application should be understood as the direction of the main current on the same side of the conductor. For example, when the co-directional distributed current is excited on the conductor in the shape of a bend or a ring (for example, the current path is also bent or ring-shaped), it should be understood that, for example, the main current excited on the conductors on the two sides of the ring-shaped conductor (for example, the conductors around a gap, on the conductors on the two sides of the gap) is opposite in direction, but still belongs to the definition of the co-directional distributed current in the embodiments of the present application. In an embodiment, the co-directional current on one conductor can mean that the current on the conductor has no reversal point. In an embodiment, the counter-directional current on one conductor can mean that the current on the conductor has at least one reversal point. In an embodiment, the co-directional current on two conductors can mean that the currents on the two conductors have no reversal point and flow in the same direction. In an embodiment, the counter-directional current on two conductors can mean that the currents on the two conductors have no reversal point and flow in opposite directions. The co-directional / counter-directional current on multiple conductors can be understood accordingly.

[0113] Resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, a resonance frequency range. The resonant frequency can be a frequency range in which the return loss characteristic is less than -5 dB. The strongest resonance point can be referred to as a resonance point, and the frequency corresponding to the resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -10 dB, -15 dB, or less than -20 dB. It should be understood that, unless otherwise specified, the first / second... resonance mentioned in the present application is the base mode resonance generated by the antenna / radiator, or in other words, the resonance with the lowest frequency generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to the specific design, and each antenna mode can correspond to generate a base mode resonance.

[0114] Polarization direction of the antenna: At a given point in space, the electric field intensity E (vector) is a function of time t, and as time goes on, the vector end point periodically traces a trajectory in space. The trajectory is a straight line and perpendicular to the ground, which is called vertical polarization, or horizontal to the ground, which is called horizontal polarization. The trajectory is an ellipse or a circle, and when observed along the propagation direction, it rotates in the right-hand or clockwise direction with time, which is called right-hand circular polarization (RHCP), or rotates in the left-hand or counterclockwise direction with time, which is called left-hand circular polarization (LHCP).

[0115] Resonant frequency band: The range of resonant frequencies is the resonant frequency band, and the frequency range in which the return loss characteristic of the resonant frequency point is less than -5 dB can be regarded as the resonant frequency band.

[0116] Communication frequency band / operating frequency band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting B40 frequency band has an operating frequency band including frequencies within the range of 2300MHz-2400MHz, or in other words, the operating frequency band of the antenna includes the B40 frequency band. The frequency range meeting the index requirements can be regarded as the operating frequency band of the antenna.

[0117] The resonant frequency band and the operating frequency band can be the same or partially overlap. In an embodiment, one or more resonant frequency bands of an antenna can cover one or more operating frequency bands of the antenna.

[0118] Electrical length: can refer to the ratio of the physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave, which can satisfy the following formula:

[0119]

[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 that the center frequency of the B1 uplink frequency band (resonant frequency of 1920MHz-1980MHz) is 1955MHz, the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, the "operating wavelength" can also refer to the wavelength corresponding to a non-center frequency of the resonant frequency or the 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 3x10 8 m / s. The wavelength of the radiation signal in a medium can be calculated as follows: Where ε is the relative permittivity of the medium. The wavelength in the embodiments of the present application generally refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency of 1920MHz-1980MHz) is 1955MHz, the wavelength can be the medium wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to a non-center frequency of the resonant frequency or the operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of the present application can be simply calculated by the relative permittivity of the medium filled on one side or more sides of the radiator.

[0123] Antenna return loss: can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the antenna port transmission power. The smaller the signal reflected back, the greater the signal radiated through the antenna to the space, and the greater the radiation efficiency of the antenna. The greater the signal reflected back, the smaller the signal radiated through the antenna to the space, and the smaller the radiation efficiency of the antenna.

[0124] The antenna return loss can be represented by the S11 parameter, which belongs to the S parameter. S11 represents the reflection coefficient, and this parameter can represent the pros and cons of the antenna transmission efficiency. S11 parameter is usually negative, the smaller the S11 parameter, the smaller the antenna return loss, the smaller the energy reflected back by the antenna itself, that is, it represents that the actual energy entering the antenna is more, and the system efficiency of the antenna is higher; the larger the S11 parameter, the larger the antenna return loss, and the lower the system efficiency of the antenna.

[0125] It should be noted that the S11 value is generally-6dB as a standard in engineering, when the S11 value of the antenna is less than-6dB, it can be considered that the antenna can work normally, or it can be considered that the transmission efficiency of the antenna is better.

[0126] Ground (GND): can refer to at least a part of any ground layer, or ground plate, or ground metal layer, etc. in an electronic device (such as a mobile phone), or at least a part of any combination of the above ground layer, or ground plate, or ground component, etc. The ground / GND can be used for the grounding of components in the electronic device, or in other words, can be used as a reference ground for components in the electronic device. Generally, a large piece of metal (for example, a metal layer) in the electronic device can be used as the ground / GND. In one embodiment, the ground / GND can include any one or more of the following: a ground layer of a circuit board of the electronic device, a ground plate formed by a middle frame of the electronic device, a ground metal layer formed by a metal film under the screen, a conductive ground layer of a battery, a metal rotating shaft of a foldable electronic device, a metal back cover of the electronic device (for example, at least a part of the back cover is made of metal), and a conductive or metal component that is electrically connected to the above ground layer / ground plate / ground metal layer. In one embodiment, the circuit board can be a printed circuit board (PCB), for example, an 8-layer, 10-layer, or 12-14 layer board with 8, 10, 12, 13, or 14 layers of conductive material, or elements separated and electrically insulated by a dielectric or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a wiring layer, and the wiring layer and the ground layer are electrically connected by a via. In one embodiment, components such as a display, a touch screen, an input button, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC), etc. can be mounted on or connected to the circuit board; or electrically connected to the wiring layer and / or the ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0127] Any ground layer, or ground plate, or ground metal layer described above is made of a conductive material. In one embodiment, the conductive material can be any one of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate, and tin-plated copper, graphite powder impregnated cloth, graphite coated substrate, copper plated substrate, brass plated substrate, and aluminum plated substrate. Those skilled in the art can understand that the ground layer / ground plate / ground metal layer can also be made of other conductive materials.

[0128] Grounding: refers to coupling with the above ground / GND through a grounding structure and / or a grounding circuit. In one embodiment, the grounding can be physical grounding, for example, physical grounding (or referred to as physical ground) at a specific position on the frame through a part of the structure of the frame. In one embodiment, the grounding can be device grounding, for example, device grounding (or referred to as device ground) through capacitors / inductors / resistors in series or parallel.

[0129] The technical solutions of the embodiments of the present application will be described below with reference to the drawings.

[0130] As shown in Figure 1 The electronic device 100 can 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 can be a cover glass, and can also be replaced by a cover made of other materials, such as a PET (Polyethylene terephthalate) material cover, etc.

[0131] The cover 13 can be arranged close to the display module 15, and can mainly serve to protect and prevent dust from entering the display module 15.

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

[0133] The middle frame 19 mainly serves to support the entire machine. Figure 1PCB 17 is shown to be disposed between the middle frame 19 and the back cover 21. It should be appreciated that in an embodiment, the PCB 17 can also be disposed between the middle frame 19 and the display module 15, which is not limited in the embodiments of the present application. The printed circuit board PCB 17 can be made of a flame resistant material (FR-4) dielectric board, a Rogers dielectric board, a hybrid dielectric board of Rogers and FR-4, etc. Here, FR-4 is a code of a flame resistant material grade, and the Rogers dielectric board is a high frequency board. The PCB 17 carries components such as radio frequency chips, etc. In an embodiment, a metal layer can be disposed on the printed circuit board PCB 17. The metal layer can be used for grounding of the components carried on the PCB 17, and can also be used for grounding of other components such as a bracket antenna, a frame antenna, etc. The metal layer can be referred to as a ground plate, or a grounding plate, or a grounding layer. In an embodiment, the metal layer can be formed by etching metal on the surface of any one of the dielectric boards in the PCB 17. In an embodiment, the metal layer for grounding can be disposed on the printed circuit board PCB 17 close to one side of the middle frame 19. In an embodiment, the edge of the printed circuit board PCB 17 can be regarded as the edge of the grounding layer thereof. In an embodiment, the metal middle frame 19 can also be used for grounding of the components described above. The electronic device 100 can also have other ground plates / grounding plates / grounding layers, which are not described herein again.

[0134] Due to the compactness of the electronic device, the ground plates / grounding plates / grounding layers are usually disposed in the internal space of 0-2mm from the inner surface of the frame (for example, the printed circuit board, the middle frame, the screen metal layer, the battery, etc. can be regarded as part of the ground plate). In an embodiment, the filling medium is filled between the frame and the ground plate. The length and width of the rectangle surrounded by the profile of the inner surface of the filling medium can be regarded as the length and width of the ground plate; or the length and width of the rectangle surrounded by the profile of the superposition of all conductive parts inside the frame can be regarded as the length and width of the ground plate.

[0135] The electronic device 100 can further include a battery (not shown in the figure). The battery can be disposed between the middle frame 19 and the back cover 21, or can be disposed between the middle frame 19 and the display module 15, which is not limited in the embodiments of the present application. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery can be disposed between the main board and the sub-board. The main board can be disposed between the middle frame 19 and the upper edge of the battery, and the sub-board can be disposed between the middle frame 19 and the lower edge of the battery.

[0136] The electronic device 100 can further include a bezel 11, which can include a conductive material such as metal. The bezel 11 can be disposed between the display module 15 and the back cover 21 and extend circumferentially around the periphery of the electronic device 100. The bezel 11 can have four side edges that surround the display module 15, helping to secure the display module 15.

[0137] In an implementation, the bezel 11 mainly including a conductive material can be referred to as a conductive bezel or a metal bezel of the electronic device 100, which is suitable for an industrial design (ID) of a metal appearance. In an implementation, the outer surface of the bezel 11 is mainly of a conductive material such as a metal material, thereby forming an appearance of a metal bezel. In these implementations, the conductive portion of the bezel 11 including the outer surface can be used as an antenna radiator of the electronic device 100 and is generally referred to as a bezel antenna.

[0138] In another implementation, the outer surface of the bezel 11 is mainly of a non-conductive material such as plastic, forming an appearance of a non-metal bezel, which is suitable for a non-metal ID. In an implementation, the inner surface of the bezel 11 can include a conductive material such as a metal material. In this implementation, the conductive portion of the inner surface of the bezel 11 can be used as an antenna radiator of the electronic device 100. It should be understood that the radiator disposed on the inner surface of the bezel 11 (or the conductive material of the inner surface) can be disposed against the non-conductive material of the bezel 11 to minimize the volume occupied by the radiator and be closer to the outside of the electronic device 100 to achieve better signal transmission, and can also be referred to as a bezel antenna. It should be noted that the radiator disposed against the non-conductive material of the bezel 11 means that the radiator can be disposed against the inner surface of the non-conductive material, can be embedded in the non-conductive material, or can be disposed close to the inner surface of the non-conductive material, for example, the radiator and the inner surface of the non-conductive material can have a small gap therebetween. It should be understood that the conductive material and the non-conductive material can both be considered as part of the bezel 11.

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

[0140] In Figure 1 In the following embodiments, the edge frame 11 of the electronic device 100 is a metal edge frame (conductive edge frame), and the appearance surface visible gap (appearance surface visible insulating gap) is taken as an example for description. In this case, the metal edge frame serves as at least part of the antenna radiator. It should be understood that the same technical effects can also be achieved when the edge frame 11 of the electronic device 100 is a non-metal edge frame (appearance surface invisible gap), and for the sake of brevity of the discussion, it will not be repeated here.

[0141] The middle frame 19 can include the edge frame 11, and the middle frame 19 including the edge frame 11 can serve as a support for the electronic devices in the entire machine. The cover plate 13 and the back cover 21 are respectively attached along the upper and lower edges of the edge frame to form the outer shell or housing of the electronic device. In one embodiment, the cover plate 13, the back cover 21, the edge frame 11, and / or the middle frame 19 can be collectively referred to as the outer shell or housing of the electronic device 100. It should be understood that the "outer shell or housing" can be used to refer to part or all of any one of the cover plate 13, the back cover 21, the edge frame 11, or the middle frame 19, or part or all of any combination of the cover plate 13, the back cover 21, the edge frame 11, or the middle frame 19.

[0142] The edge frame 11 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals, and there can be a gap between the portion of the edge frame that serves as the radiator and other portions of the middle frame 19, thereby ensuring that the antenna radiator has a good radiation environment. In one embodiment, the middle frame 19 can be provided with an aperture at the portion of the edge frame that serves as the radiator to facilitate the radiation of the antenna.

[0143] Alternatively, the bezel 11 can not be considered as a part of the middle frame 19. In one embodiment, the bezel 11 can be connected with the middle frame 19 and formed integrally. In another embodiment, the bezel 11 can include protrusions extending inwardly to be connected with the middle frame 19, for example, by means of elastic sheets, screws, welding, etc. The protrusions of the bezel 11 can also be used to receive feeding signals, so that at least a part of the bezel 11 serves as a radiator of the antenna to receive / transmit radio frequency signals. The part of the bezel serving as the radiator can have a gap with the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment and the antenna has a good signal transmission function.

[0144] The back cover 21 can be made of a metal material, or made of a non-conductive material such as a glass back cover, a plastic back cover, etc. In one embodiment, the back cover 21 made of a conductive material can replace the middle frame 19 and be integrated with the bezel 11 to support the electronic devices in the whole machine.

[0145] In one embodiment, the conductive part of the middle frame 19 and / or the back cover 21 can serve as a reference ground of the electronic device 100, and the bezel 11, the PCB 17, etc. of the electronic device can be grounded by electrical connection with the middle frame.

[0146] The antenna of the electronic device 100 can also be arranged in the housing, for example, a bracket antenna, a millimeter wave antenna, etc. Figure 1 The clearance of the antenna arranged in the housing can be obtained by a slit / opening on any one of the middle frame, the bezel, the back cover, and the display screen, or by a non-conductive gap / aperture formed between any two of them, and the clearance of the antenna can ensure the radiation characteristics of the antenna. It should be understood that the clearance of the antenna can be a non-conductive area formed by any conductive component in the electronic device 100, and the antenna radiates signals to the external space through the non-conductive area. In one embodiment, the antenna can be in the form of a flexible printed circuit (FPC) based antenna, a laser-direct-structuring (LDS) based antenna, or a microstrip disk antenna (MDA), etc. In one embodiment, the antenna can also be a transparent structure embedded in the screen of the electronic device 100, so that the antenna is a transparent antenna unit embedded in the screen of the electronic device 100.

[0147] Figure 1 Only some components of the electronic device 100 are shown schematically, and the actual shape, actual size, and actual structure of these components are not limited by 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 This is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0153] like Figure 2 As shown, 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 part of the radiator 210 is spaced apart from the ground plate 300. The radiator 210 includes a first feeding point 211 and a second feeding point 212. A distance L1 between the first feeding point 211 and the center of the radiator 210 satisfies: 0.125×L0≤L1≤0.375×L0. A distance L2 between the second feeding 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 an embodiment, both ends of the radiator 210 are open ends, and the two ends of the radiator 210 are not coupled to the ground plate 300.

[0156] It should be understood that the center of the radiator 210 can be understood as the center of the length of the radiator 210, and the length of the radiator 210 on both sides of the center is the same. For the sake of brevity of the discussion, the center of the radiator 210 described in the embodiments of the present application can be understood accordingly, and will not be described one by one. When the first feeding point 211 and the second feeding point 212 are within the above range, the radiator 210 can be better excited to resonate when the electrical signal is fed into the first feeding point 211 and the second feeding point 212.

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

[0158] The radiator 210 and the first feeding circuit 220 are used to generate a first resonance and a second resonance, and the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance. The radiator 210 and the second feeding circuit 230 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 include a first frequency band.

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

[0160] According to the embodiments of the present application, the first sub-antenna and the second sub-antenna share the radiator 210, which can make the electronic device 100 have more antennas in a smaller layout space to increase the data transmission rate of the electronic device 100. At the same time, since the first capacitor 221 is coupled between the second feeding point 212 and the second feeding circuit 230, and the second end of the first capacitor 221 is coupled to the ground plate 300, the first capacitor 221 can improve the isolation of the first sub-antenna and the second sub-antenna in the first frequency band, so that the first sub-antenna and the second sub-antenna both have good radiation characteristics in the first frequency band.

[0161] In addition, the first sub-antenna can also generate a first resonance at a frequency lower than the first frequency band. The first resonance can include a second frequency band. The second frequency band can include other communication frequency bands, thereby expanding the working frequency band of the first sub-antenna, so that the antenna 200 can work in more communication frequency bands.

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

[0163] It should be understood that, for the sake of brevity of discussion, in the embodiments of the present application, only the first frequency band and the second frequency band are taken as examples to include the above-mentioned communication frequency bands, and in actual production or application, other communication frequency bands can also be included.

[0164] In one embodiment, at the resonance point of the first resonance, the current on the radiator 210 is in the same direction, as shown in FIG. 2B. Figure 3

[0165] It should be understood that, when both ends of the radiator 210 are open ends, the first feeding circuit 220 feeds in an electrical signal, and due to the fact that the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfies the above-mentioned proportional relationship, the first resonance can be generated by the one-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 resonance point of the second resonance, the current on the radiator 210 reverses on both sides of the center, and due to the fact that the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfies the above-mentioned proportional relationship, the current on the radiator 210 is in the same direction in the first region 231, as shown in FIG. 2C. Figure 4

[0167] In one embodiment, at the resonance point of the third resonance, the current on the radiator 210 reverses on both sides of the center, and the current on the radiator 210 reverses in the first region 231, and the first region 231 includes the second feeding point 212, as shown in FIG. 2D. Figure 5

[0168] ​​​The first region 231 can be understood as a region with a distance to the second feeding point 212 within a first threshold. For example, the first threshold can be 5mm, 3mm, etc. For the sake of brevity of the discussion, the regions described in the embodiments of the present application can be understood accordingly, and will not be described one by one.

[0169] It should be understood that when both ends of the radiator 210 are open ends, and the first feeding circuit 220 feeds in an electrical signal, due to the distance L2 between the second feeding point 212 and the center of the radiator 210 satisfying the above proportion relationship, the second resonance can be generated by a one-wavelength mode of the radiator 210, and the current on the radiator 210 reverses on both sides of the center. Correspondingly, at the resonance point of the second resonance, the current on the radiator 210 is the same in the first region 231.

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

[0171] In addition, due to the first capacitor 221 being coupled between the second feeding circuit 230 and the second feeding point 212, the first capacitor 221 can make the radiator 210 not generate a resonance similar to the first resonance when the second feeding circuit 230 feeds in an electrical signal (at the same time, the current generated by the radiator 210 when generating the first resonance can also be suppressed from being transmitted to the second feeding circuit 230), so as to improve the isolation of the first sub-antenna and the second sub-antenna in the resonance frequency band of the first resonance.

[0172] In one embodiment, at the resonance point of the second resonance, the electric field generated by the radiator 210 is of a first polarization in the first region 231. At the resonance point of the third resonance, the electric field generated by the radiator 210 is of a second polarization in the first region 231. The first polarization and the second polarization are orthogonal. The first polarization and the second polarization being orthogonal can be understood as that the electric field of the first polarization and the electric field of the second polarization are orthogonal in far-field integration.

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

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

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

[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 has a stronger current when the radiator 210 generates the second resonance and the third resonance. Since the first region has a stronger current at the second resonance and the third resonance, the electric field generated by the radiator 210 at the second resonance and the electric field generated by the radiator 210 at the third resonance have more orthogonal components, and the first sub-antenna and the second sub-antenna have better isolation in the first frequency band.

[0177] In an embodiment, when 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 the same side 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, and the embodiments of the present application do not limit this. In order to make the description simple, only the case that the first feed point 211 and the second feed point 212 are located on the same side of the center of the radiator 210 is described in the embodiments of the present application.

[0179] In an embodiment, the radiator 210 further includes a slot 240, as shown in Figure 7 ​The slot 240 separates the radiator 210 into a first portion and a second portion. The second feed point 212 can be located in the first portion. The first portion can be coupled to the floor 300.

[0180] It should be understood that in the above embodiments, the first capacitor 221 is exemplified as a lumped element. 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 as the first capacitor. The equivalent capacitance value of the first capacitor can be adjusted by adjusting the width of the slot 240, the medium filled in the slot 240, and the like.

[0181] In an embodiment, the radiator 210 further comprises a feed piece 241, as shown. Figure 8 The feed piece 241 and the second feed point 212 are opposite and do not contact each other. The feed piece 241 is coupled to the second feed circuit 230.

[0182] It should be understood that in the above embodiments, the second feed circuit 230 is exemplified as being electrically connected (directly coupled) to the second feed point 212. In actual production or design, the second feed circuit 230 can also be indirectly coupled to the second feed point 212. In this case, a distributed capacitor can be formed between the feed piece 241 and the radiator 210 as the first capacitor. The equivalent capacitance value of the first capacitor can be adjusted by adjusting the opposite area of the feed piece 241 and the radiator 210, the distance between the feed piece 241 and the radiator 210, and the like.

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

[0184] It should be understood that in the case where the first capacitor 221 is used to make the second feed circuit 230 feed in an electrical signal, the radiator 210 does not produce a resonance similar to the first resonance (at the same time, the current transmitted to the second feed circuit 230 when the radiator 210 produces the first resonance can also be suppressed). Therefore, the equivalent capacitance value of the first capacitor 221 can be determined according to the resonance point frequency of the first resonance.

[0185] In an embodiment, the resonance point frequency f2 of the second resonance and the resonance point frequency f1 of the first resonance satisfy: 1.5 x f1≤f2≤2.5 x f1.

[0186] It should be understood that the radiator 210 can have at least one slot, as shown. Figure 9The slot can be used to adjust the current path on the radiator 210 when the first resonance and the second resonance are generated, so that the resonance point of the first resonance and the resonance point of the second resonance are located at different frequencies, thereby adjusting the radiation characteristics of the first sub-antenna in the resonance frequency band of the first resonance and the resonance frequency band of the second resonance. When the slot is arranged in the area where the current of the radiator 210 is strong when the first resonance is generated, the influence on the resonance point frequency of the first resonance is greater (the resonance point frequency offset is greater). Similarly, when the slot is arranged in the area where the current of the radiator 210 is strong when the second resonance is generated, the influence on the resonance point frequency of the second resonance is greater (the resonance point frequency offset is greater).

[0187] For the sake of brevity of the discussion, only the case of arranging the slot on the radiator 210 is taken as an example in the embodiments of the present application, and in actual production or design, the radiation characteristics of the first sub-antenna in the resonance frequency band of the first resonance and the resonance frequency band of the second resonance can also be adjusted by other means, for example, arranging elements on the radiator 210, coupling a tuning circuit with the radiator 210, and the like, which will not be described one by one.

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

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

[0190] In one embodiment, the electronic device 100 can further include a bracket 251, as Figure 10 The radiator 210 is located on the surface of the bracket 251.

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

[0192] In one embodiment, a shielding cover 16 can be arranged between the bracket 251 and the PCB 17. In one embodiment, elements can be arranged in the shielding cover 16, which can avoid mutual interference between the elements and the radiator 210.

[0193] It should be understood that when the radiator 210 is located on the inner side of the electronic device 100, since the radiator 210 is not located on the appearance surface of the electronic device 100, the layout mode is more flexible.

[0194] Figure 11 to Figure 14 is Figure 2 The simulation result of the antenna 200 in the electronic device 100 shown in Figure 11 is Figure 2 The simulation result of the S parameter of the antenna 200 in the electronic device 100 shown in Figure 12is Figure 2 is a schematic diagram of an electric field distribution of the antenna 200 in the electronic device 100 at a resonance point of the first resonance. Figure 13 is Figure 2 is a schematic diagram of an electric field distribution of the antenna 200 in the electronic device 100 at a resonance point of the second resonance. Figure 14 is Figure 2 is a schematic diagram of an electric field distribution of the antenna 200 in the electronic device 100 at a resonance point of the third resonance.

[0195] As shown in FIG. 6, the first sub-antenna (S11) resonates near 3.6 GHz and near 7.6 GHz. The resonance near 3.6 GHz can correspond to the first resonance in the above-described embodiments. The resonance near 7.6 GHz can correspond to the second resonance in the above-described embodiments. Figure 11 The second sub-antenna (S22) resonates near 7.6 GHz, which can correspond to the third resonance in the above-described embodiments.

[0196] With S11 / S22<-4 dB as a boundary, the resonance frequency band of the second resonance and the resonance frequency band of the third resonance both include 7.5 GHz-7.7 GHz. In this frequency band, the first sub-antenna and the second sub-antenna have a good isolation (S12 / S21) between them, and the isolation is greater than 15 dB.

[0197] As shown in FIG. 7, at a resonance point (for example, 3.6 GHz) of the first resonance, the current on the radiator 210 is in the same direction, and the electric field generated by the first resonance in the first area 231 is vertically polarized.

[0198] Figure 12 As shown in FIG. 8, at a resonance point (for example, 7.6 GHz) of the second resonance, the current on the radiator 210 is in the same direction (the current on the radiator 210 is reversed on both sides of the center of the radiator) in the first area 231, and this current distribution generates a horizontally polarized electric field in the first area 231.

[0199] As shown in FIG. 9, at a resonance point (for example, 7.6 GHz) of the third resonance, the current on the radiator 210 is reversed in the first area 231, and this current distribution generates a vertically polarized electric field in the first area 231. Figure 13

[0200] As shown in FIG. 10, the electronic device 100 provided by the embodiment of the present application is a schematic diagram of an electronic device 100. Figure 14 As shown in FIG. 11, the antenna 200 further includes a second capacitor 222 and a third feeding circuit 250.

[0201] Figure 15 is a schematic diagram of an electric field distribution of the antenna 200 in the electronic device 100 at a resonance point of the first resonance.

[0202] As shown in FIG. 6, the first sub-antenna (S11) resonates near 3.6 GHz and near 7.6 GHz. The resonance near 3.6 GHz can correspond to the first resonance in the above-described embodiments. The resonance near 7.6 GHz can correspond to the second resonance in the above-described embodiments. Figure 15

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

[0204] The first end of the second capacitor 222 is coupled with the third feeding point 213, the second end of the second capacitor 222 is coupled with the third feeding circuit 250, and the second end of the second capacitor 222 is coupled with the ground plate 300. In an 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 embodiment, and for the sake of brevity of the discussion, it will not be repeated here.

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

[0206] It should be understood that, Figure 15 The difference between the antenna 200 in the electronic device 100 shown in Figure 2 , Figure 6 to Figure 10 The difference between the antenna 200 in the electronic device 100 shown in

[0207] In the electronic device 100 shown in Figure 2 , Figure 6 to Figure 10 The antenna 200 in the electronic device 100 shown in Figure 15 The first sub-antenna, the second sub-antenna and the third sub-antenna multiplex the radiator 210, and more antennas can be arranged in a smaller layout space to increase the data transmission rate of the electronic device 100. At the same time, due to the arrangement of the first capacitor 221 and the second capacitor 222, the isolation of the first sub-antenna, the second sub-antenna and the third sub-antenna in the first frequency band can be improved, and the first sub-antenna and the second sub-antenna have good radiation characteristics in the first frequency band.

[0208] In an embodiment, at the resonance point of the third resonance, the current on the radiator 210 is reversed in the second area 232, and the second area 232 includes the third feeding point 213, as shown in Figure 16

[0209] ​It should be understood that when both ends of the radiator 210 are open ends, the third feeding circuit 250 feeds in an electrical signal, and 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 the third feeding circuit 250 feeds in an electrical signal, the current on the radiator 210 reverses on both sides of the third feeding point 213. Correspondingly, at the resonance point of the fourth resonance, the current on the radiator 210 reverses in the second region 232.

[0210] In addition, since the second capacitor 222 is coupled between the second feeding circuit 230 and the second feeding point 212, the second capacitor 222 can prevent the radiator 210 from generating a resonance similar to the first resonance when the third feeding circuit 250 feeds in an electrical signal (at the same time, the second capacitor 222 can also prevent the current on the radiator 210 from being transmitted to the third feeding circuit 250 when the radiator 210 generates the first resonance), so as to improve the isolation of the first sub-antenna and the third sub-antenna in the resonance frequency band of the first resonance.

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

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

[0213] At the resonance point of the third resonance, the current on the radiator 210 reverses in the first region 231 and flows in the same direction in the second region 232, and the current distribution that reverses in the first region 231 can generate an electric field with the second polarization, and the current distribution that flows in the same direction in the second region 232 can generate an electric field with the first polarization.

[0214] At the resonance point of the fourth resonance, the current on the radiator 210 flows in the same direction in the first region 231 and reverses in the second region 232, and the current distribution that flows in the same direction in the first region 231 can generate an electric field with the first polarization, and the current distribution that reverses in the second region 232 can generate an electric field with the second polarization.

[0215] Since the second region 232 includes the third feeding point 213, the second region 232 has a strong current when the radiator 210 generates the fourth resonance, and the electric field generated by the fourth resonance in the second region 232 is polarized orthogonally to the electric field generated by the second resonance and the electric field generated by the third resonance, so 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 of the discussion, Figure 10 The antenna 200 in the electronic device 100 shown Figure 4 , Figure 7 and Figure 8The antenna 200 and similar parts in the electronic device 100 shown 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 yes Figure 15 Simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown.

[0218] like Figure 17 As shown, 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 This is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0222] like Figure 18 As shown, 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 part of the radiator 210 is spaced apart from the ground plate 300. The radiator 210 includes a first feeding point 211 and a second feeding point 212. A distance L1 between the first feeding point 211 and a center of the radiator 210 satisfies: L1≤0.25×L0. A distance L2 between the second feeding point 212 and the center of the radiator 210 satisfies: L2≤0.25×L0, where L0 is a length of the radiator. In an embodiment, a first end of the radiator 210 is a grounded end, and a second end of the radiator 210 is an open end. The first end of the radiator 210 is coupled to the ground plate 300.

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

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

[0227] The radiator 210 and the first feeding circuit 220 are configured to generate a first resonance and a second resonance. A resonance point frequency of the first resonance is lower than a resonance point frequency of the second resonance. The radiator 210 and the second feeding circuit 230 are configured to generate a third resonance. The second resonance and the third resonance each include a first frequency band. In an embodiment, the first resonance can include a second frequency band.

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

[0229] It should be understood that, for the sake of brevity of the discussion, only the first frequency band and the second frequency band are taken as examples of the above-mentioned communication frequency bands in the embodiments of the present application. In actual production or application, other communication frequency bands can also be included.

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

[0231] It should be understood that, Figure 18 The antenna 200 in the electronic device 100 shown Figure 2 , Figure 6 to Figure 10The difference between the antennas 200 in the electronic devices 100 shown in FIGS. 1A and 1B is only the boundary condition of the radiators 210.

[0232] In the electronic device 100 shown in FIG. 1A, both ends of the radiator 210 are open ends. The first resonance can be generated by a one-half wavelength mode of the radiator 210. The second resonance can be generated by a one wavelength mode of the radiator 210. The third resonance can be generated by a similar one wavelength mode of the radiator 210. Figure 2 , Figure 6 to Figure 10 In the electronic device 100 shown in FIG. 1B, 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 one-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 electronic device 100 shown in FIG. 1A, the electronic device 100 shown in FIG. 1B has a small size and a high data transmission rate.

[0233] In the electronic device 100 shown in FIG. 1C, 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 one-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 electronic device 100 shown in FIG. 1A, the electronic device 100 shown in FIG. 1C has a small size and a high data transmission rate. Figure 18 , Figure 2 , Figure 6 to Figure 10 In the electronic device 100 shown in FIG. 1D, the first sub-antenna and the second sub-antenna have good radiation characteristics in the first frequency band. Meanwhile, the first sub-antenna and the second sub-antenna multiplex the radiator 210, and more antennas can be arranged in a small layout space to increase the data transmission rate of the electronic device 100. Figure 18 In an embodiment, at the resonance point of the first resonance, the current on the radiator 210 is in the same direction, as shown in FIG. 2A.

[0234] Figure 19 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, the first feeding circuit 220 feeds in an electrical signal, and due to the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfying the above proportion relationship, the first resonance can be generated by a one-quarter wavelength mode of the radiator 210, and the current on the radiator 210 is in the same direction.

[0235] In an embodiment, at the resonance point of the second resonance, the current on the radiator 210 reverses on both sides of the center, as shown in FIG. 2B.

[0236] In an embodiment, at the resonance point of the third resonance, the current on the radiator 210 reverses in the first region 231, and the first region 231 includes the second feeding point 212, as shown in FIG. 2C. Figure 20

[0237] In an embodiment, at the resonance point of the third resonance, the current on the radiator 210 reverses in the first region 231, and the first region 231 includes the second feeding point 212, as shown in FIG. 2C. Figure 21

[0238] ​​​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 an electrical signal, due to the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfying the above proportion 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 a grounded end and the second end is an open end, and the second feeding circuit 230 feeds an electrical signal, due to the distance L2 between the second feeding point 212 and the center of the radiator 210 satisfying the above proportion relationship, the third resonance can be generated by the three-quarter wavelength mode of the radiator 210. Due to the second end of the first capacitor 221 being coupled to the ground plane 300, when the second feeding circuit 230 feeds an electrical signal, the current on the radiator 210 is in the opposite direction on both sides of the second feeding point 212. Correspondingly, at the resonance point of the third resonance, the current on the radiator 210 is in the opposite direction in the first region 231.

[0240] And, due to the first capacitor 221 being coupled between the second feeding circuit 230 and the second feeding point 212, the first capacitor 221 can make the radiator 210 not generate a resonance similar to the first resonance when the second feeding circuit 230 feeds an electrical signal (at the same time, it can also inhibit the current generated by the radiator 210 when the first resonance is generated from being transmitted to the second feeding circuit 230), so as to improve the isolation of the first sub-antenna and the second sub-antenna in the resonance frequency band of the first resonance.

[0241] In one embodiment, at the resonance point of the second resonance, the electric field generated by the radiator 210 is in a first polarization in the first region 231. At the resonance point of the third resonance, the electric field generated by the radiator 210 is in a second polarization in the first region 231. The first polarization and the second polarization are orthogonal. The first polarization and the second polarization being orthogonal can be understood as the electric field of the first polarization and the electric field of the second polarization being orthogonal in the far field integration.

[0242] It should be understood that at the resonance 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 an electric field of the first polarization. At the resonance 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 an electric field of the second polarization. Since the first region 231 includes the second feeding point 212, the first region 231 has a strong current when the third resonance is generated by the radiator 210, and the electric field generated by the first region 231 by the second resonance and the electric field generated by the third resonance are polarized orthogonally, so 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 is of 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: 1mm≤D≤5mm.

[0245] It should be understood that the first feeding point 211 and the second feeding point 212 are close to each other, and the first region has a stronger current when the radiator 210 generates the second resonance and the third resonance. Since the first region has a stronger current when the second resonance and the third resonance, the electric field generated by the radiator 210 has 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, Figure 18 The antenna 200 in the electronic device 100 shown in Figure 4 , Figure 7 and Figure 8 Similar parts of the antenna 200 in the electronic device 100 shown in will not be described one by one, for example, similar parts include: the position of the radiator 210; the type (lumped element or distributed element) and the value range of the first capacitor 221; the relative relationship and adjustment mode 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 the like.

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

[0248] AsFigure 22 As shown, 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] like Figure 23 As shown, 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] like Figure 24 As shown, 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 the current distribution in the first region 231 generates a horizontally polarized electric field.

[0253] like Figure 25 As shown, 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 This is a schematic diagram of an electronic device 100 provided in an embodiment of this application.

[0255] like Figure 26 As shown, 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 part of the radiator 210 is spaced apart from the ground plate 300. The radiator 210 includes a first feeding point 211 and a second feeding point 212. A distance L1 between the first feeding point 211 and the center of the radiator 210 satisfies: 0.125 x L0≤L1≤0.375 x L0. A distance L2 between the second feeding point 212 and the center of the radiator 210 satisfies: L2≤0.125 x L0, where L0 is the length of the radiator. In an embodiment, both ends of the radiator 210 are grounded, and the first end and the second end of the radiator 210 are coupled to the ground plate 300.

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

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

[0260] The radiator 210 and the first feeding circuit 220 are used to generate a first resonance and a second resonance, and the resonance point frequency of the first resonance is lower than the resonance point frequency of the second resonance. The radiator 210 and the second feeding circuit 230 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 include a first frequency band. The first resonance can include a second frequency band.

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

[0262] It should be understood that, for the sake of brevity of discussion, only the first frequency band and the second frequency band include the above-mentioned communication frequency bands in the embodiments of the present application, and other communication frequency bands can also be included in actual production or application.

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

[0264] It should be understood that, Figure 26 The antenna 200 in the electronic device 100 shown Figure 2 , Figure 6 to Figure 10The only difference in the antenna 200 of the electronic device 100 shown is the boundary condition of the radiator 210.

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

[0266] And in Figure 26 In the illustrated electronic device 100, both ends of the radiator 210 are grounded. The radiator 210 is a slot antenna structure. The first resonance can be generated by a half-wavelength mode of the slot antenna. The second resonance can be generated by a 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...) Figure 2 , Figure 6 to Figure 10 The antenna 200 in the electronic device 100 shown is in Figure 26 In the illustrated electronic device 100, both the first and second sub-antennas exhibit good radiation characteristics in the first frequency band. Furthermore, both the first and second sub-antennas reuse the radiator 210, allowing for the placement of more antennas within 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, such as... Figure 27 As shown.

[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 as in the first region 231, such as... Figure 28 As shown.

[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, such as... Figure 29 As shown.

[0271] It should be understood that when both ends of the radiator 210 are grounded, due to the distance L1 between the first feeding point 211 and the center of the radiator 210 satisfying the above proportion relationship, the first feeding circuit 220 feeds in an electrical signal, and the second resonance can be generated by a one-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, the second feeding circuit 230 feeds in an electrical signal, and due to the distance L2 between the second feeding point 212 and the center of the radiator 210 satisfying the above proportion relationship, the third resonance can be generated by a similar one-wavelength mode of the radiator 210. Due to the second end of the first capacitor 221 being coupled to the ground plane 300, when the second feeding circuit 230 feeds in an electrical signal, the current on the radiator 210 is reversed on both sides of the second feeding point 212. Correspondingly, at the resonance point of the third resonance, the current on the radiator 210 is reversed in the first region 231.

[0273] And, due to the first capacitor 221 being coupled between the second feeding circuit 230 and the second feeding point 212, the first capacitor 221 can make the radiator 210 not generate a resonance similar to the first resonance when the second feeding circuit 230 feeds in an electrical signal (at the same time, it can also inhibit the current generated when the radiator 210 generates the first resonance from being transmitted to the second feeding circuit 230), so as to improve the isolation of the first sub-antenna and the second sub-antenna in the resonance frequency band of the first resonance.

[0274] In one embodiment, at the resonance point of the second resonance, the electric field generated by the radiator 210 is of a first polarization in the first region 231. At the resonance point of the third resonance, the electric field generated by the radiator 210 is of a second polarization in the first region 231. The first polarization and the second polarization are orthogonal. The first polarization and the second polarization being orthogonal can be understood as the electric field of the first polarization and the electric field of the second polarization being orthogonal in the far field integration.

[0275] It should be understood that at the resonance 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 an electric field of the first polarization. At the resonance point of the third resonance, the current on the radiator 210 is reversed in the first region 231, and this current distribution can generate an electric field of the second polarization. Since the first region 231 includes the second feeding point 212, the first region 231 has a strong current when the radiator 210 generates the third resonance, and the electric field generated by the second resonance and the electric field generated by the third resonance are polarized orthogonally in the first region 231, so 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, Figure 26 The antenna 200 in the electronic device 100 shown is... Figure 4 , Figure 7 as well as Figure 8 The similar parts of the antenna 200 in the electronic device 100 shown 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] Figure 30 to Figure 33 yes Figure 26 The simulation results of the antenna 200 in the electronic device 100 shown are presented. Among them, Figure 30 yes Figure 26 Simulation results of the S-parameters of the antenna 200 in the electronic device 100 shown. Figure 31 yes Figure 26 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the first resonance. Figure 32 yes Figure 26 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the second resonance. Figure 33 yes Figure 26 A schematic diagram of the electric field distribution of the antenna 200 in the electronic device 100 at the resonant point of the third resonance.

[0281] like Figure 30 As shown, 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] like Figure 31 As shown, 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] like Figure 32 As shown, 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 the current distribution in the first region 231 generates a horizontally polarized electric field.

[0286] like Figure 33 As shown, 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

1. An electronic device, 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 arranged 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.

2. 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.

3. 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.

4. 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.

5. The electronic device according to any one of claims 1 to 4, wherein: the antenna further comprises a feed piece, the feed piece and the second feed point being opposite and not in contact with each other, 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.

6. 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.

7. 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.

8. 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.

9. The electronic device of 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.

10. The electronic device of 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 reversed.

11. The electronic device of 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.

12. An electronic device, 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 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, and 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; 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.

13. The electronic device of claim 12, wherein, a distance D between the first feeding point and the second feeding point satisfies: 0<D≤0.125 x L0.

14. The electronic device of claim 12 or 13, wherein, The distance D between the first feeding point and the second feeding point satisfies: 1mm≤D≤5mm.

15. The electronic device of any one of claims 12-14, wherein: An equivalent capacitance value of the first capacitor is greater than or equal to 0.1 pF and less than or equal to 3 pF.

16. The electronic device of any one of claims 12-15, 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.

17. The electronic device of any one of claims 12-16, wherein: At a resonance point of the second resonance, currents of the radiator in a first region are in the same direction, the first region including the second feeding point, and / or At a resonance point of the third resonance, currents of the radiator in the first region are in opposite directions.

18. The electronic device of any one of claims 12-17, wherein: At a resonance point of the second resonance, an electric field generated by the radiator in a first region is in a first polarization, the first region including the second feeding point, 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.

19. The electronic device of any one of claims 12-18, 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.

20. The electronic device of any one of claims 12-19, 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.

21. An electronic device, comprising: including: 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, and 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, lengths of the radiator on both sides of the center of the radiator being 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 configured 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.

22. The electronic device of claim 21, wherein, a distance D between the first feeding point and the second feeding point satisfies: 0.125 x L0≤ D≤ 0.5 x L0.

23. The electronic device of claim 21 or 22, wherein, a distance D between the first feeding point and the second feeding point satisfies: 5 mm≤ D≤ 15 mm.

24. 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.

25. The electronic device of any one of claims 21 to 24, wherein, the antenna further comprises a feeding member, the feeding member is 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.

26. 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 are in the same direction, the first region including the second feeding point, and / or, at a resonance point of the third resonance, currents of the radiator in the first region are in opposite directions.

27. 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 has a first polarization in a first region, the first region including the second feeding point, and / or, at a resonance point of the third resonance, an electric field generated by the radiator has a second polarization in the first region, the first polarization and the second polarization being orthogonal.

28. 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 x f1≤ f2≤ 2.5 x f1.

29. The electronic device of any one of claims 21 to 28, 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.

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