Antenna structure and electronic equipment

Abstract

This application provides an antenna structure and an electronic device. The antenna structure includes a first capacitor and a first slot formed on a metal plate. The two ends of the first slot are grounded to form a first grounding terminal and a second grounding terminal. The first capacitor is connected to a first access point on a first side and a second access point on a second side, respectively. A first feed point is provided between the first capacitor and the second access point. When the antenna structure operates at a first frequency in a first operating frequency band, the first capacitor is in a first state, and a first resonant circuit is formed between the first grounding terminal and the second grounding terminal. When the antenna structure operates at a second frequency in the first operating frequency band, the first capacitor is in a second state, and a second resonant circuit is formed between the first grounding terminal and the first feed point. The antenna structure can achieve dual resonance in the first operating frequency band by feeding an electrical signal through the first capacitor. Furthermore, the first inductor connected in parallel with the first slot can expand the radiation aperture of the antenna structure.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna structure and electronic device. Background Technology

[0002] As a key component for enabling wireless communication in electronic devices, antenna design plays a crucial role in the overall performance of the device. One technique involves creating slots in the metal frame of the electronic device to improve its radiation characteristics. However, this method disrupts the continuity and integrity of the metal frame, resulting in a lack of visual cohesion and symmetry, failing to meet users' aesthetic preferences. Therefore, some electronic devices employ an antenna design that avoids creating slots in the metal frame, giving the device a smoother and more refined appearance.

[0003] However, current antenna structures with continuous seams have poorer radiation characteristics than those with broken seams, affecting the communication performance of electronic devices. Utility Model Content

[0004] This application provides an antenna structure and electronic device that can improve the radiation characteristics of a non-slit frame antenna structure, thereby helping to improve the communication performance of the electronic device.

[0005] In a first aspect, an antenna structure is provided, comprising: a first capacitor, a first feed point, and a first slot formed on a metal plate;

[0006] The two ends of the first gap are grounded to form a first grounding end and a second grounding end. The first gap has a first side and a second side that are disposed opposite to each other along the width direction of the first gap. The first side is provided with a first access point, and the second side is provided with a second access point opposite to the first access point.

[0007] One end of the first capacitor is connected to the first access point, the other end of the first capacitor is connected to the positive terminal of the first feed point, the negative terminal of the first feed point is connected to the second access point, the distance between the first capacitor and the first grounding terminal is L1, the distance between the first capacitor and the second grounding terminal is L2, and L1 > L2.

[0008] When the antenna structure operates at a first frequency in the first operating frequency band, the first capacitor is in a first state, and a first resonant circuit is formed between the first ground terminal and the second ground terminal.

[0009] When the antenna structure operates at a second frequency in the first operating frequency band, the first capacitor is in a second state, and a second resonant circuit is formed between the first ground terminal and the first feed point. The resonant frequencies of the first resonant circuit and the second resonant circuit are different. The reactance of the first capacitor in the first state is higher than that in the second state, and the second frequency is higher than the first frequency.

[0010] The antenna structure provided in this application embodiment has the following characteristics: at a first frequency in a first operating frequency band, the first capacitor is in a first state, and a first resonant circuit is formed between the first ground terminal and the second ground terminal; at a second frequency (higher than the first frequency), the first capacitor is in a second state, and a second resonant circuit is formed between the first ground terminal and the first feed point. The antenna structure automatically adjusts the characteristics of the resonant circuit according to different frequencies, so that the antenna can have a better radiation effect at different frequencies, thus improving the adaptability of the antenna structure to signals of different frequencies.

[0011] The first capacitor exhibits different states (first state and second state) at different frequencies, forming a first resonant circuit and a second resonant circuit respectively, and the resonant frequencies of the two resonant circuits are different. In this way, the antenna structure can achieve dual resonance in the first operating frequency band. Compared with the traditional antenna structure, the antenna structure of the present application embodiment can better adapt to signals of different frequencies, thereby widening the operating frequency band of the antenna and improving the radiation performance of the antenna structure in multiple frequency bands.

[0012] In one possible implementation, the wavelength of the first operating frequency band is λ1, and L2 ≤ 0.1λ1.

[0013] In the low-frequency mode (first frequency) of the first operating frequency band, the first capacitor is in the first state and is not fully conducting. The first ground terminal and the second ground terminal form a first resonant circuit S1. The distance between the first feed point and the second ground terminal is not greater than 0.1 times the wavelength λ1 of the first operating frequency band. That is, the distance between the first feed point and the second ground terminal is much smaller than the wavelength of the first operating frequency band. When the antenna structure operates at the second frequency, the high-frequency electric field is concentrated in the region between the first ground terminal and the first feed point.

[0014] In one possible implementation, the antenna structure further includes a first inductor disposed between the first ground terminal and the first feed point, and the first inductor is connected to the first side and the second side respectively, so that the electric field between the first ground terminal and the first inductor is in the same direction as the electric field between the first inductor and the first feed point.

[0015] A first inductor is provided between the first ground terminal and the first feed point. The first inductor connects the first side and the second side, which makes the electric fields formed in the region between the first ground terminal and the first inductor and the region between the first inductor and the first feed point in the same direction, thereby increasing the radiation aperture of the antenna structure.

[0016] Compared with traditional half-wavelength resonant slots, the antenna structure provided in this application, which incorporates a first inductor, can improve efficiency by at least 1 dBi.

[0017] In one possible implementation, the antenna structure further includes a second inductor disposed between the first inductor and the first feed point, and the second inductor is connected to the first side and the second side respectively, so that the electric fields between the first ground terminal and the first inductor, the electric fields between the first inductor and the second inductor, and the electric fields between the second inductor and the first feed point are in the same direction.

[0018] Adding a second inductor is equivalent to splicing together more local antenna structures to obtain a longer overall antenna structure with the electric field in the same direction everywhere. This can further improve the effective radiation aperture of the antenna structure.

[0019] In one possible implementation, the inductance of the first inductor is 0.5nH to 2nH.

[0020] Setting the inductance of the first inductor to 0.5nH to 2nH allows for the formation of a unidirectional electric field between the first ground terminal and the first feed point, thereby increasing the radiation aperture of the antenna structure.

[0021] In some embodiments, the inductance of the second inductor is 0.5nH to 2nH.

[0022] In some embodiments, when the first operating frequency band is 2.4 GHz, the inductance of the first inductor can be 1 nH to 2 nH, and the inductance of the second inductor can be 1 nH to 2 nH; when the first operating frequency band is 5 GHz, the inductance of the first inductor can be 0.5 nH to 1.5 nH, and the inductance of the second inductor can be 0.5 nH to 1.5 nH.

[0023] In one possible implementation, the capacitance of the first capacitor is 0.1pF to 2pF.

[0024] The capacitance of the first capacitor is set to 0.1pF to 2pF. It can be fed through coupling, and the antenna structure can form a first resonant circuit when it operates at the first frequency of the first operating frequency band, and form a second resonant circuit when it operates at the second frequency of the first operating frequency band.

[0025] In some embodiments, when the first operating frequency band is 2.4 GHz, the capacitance of the first capacitor is 0.2 pF to 2 pF; when the first operating frequency band is 5 GHz, the capacitance of the first capacitor is 0.1 pF to 1 pF.

[0026] In one possible implementation, the wavelength of the first operating frequency band is λ1, and the length of the first resonant circuit is 0.7λ1 to 1.5λ1.

[0027] And / or, the length of the second resonant circuit is 0.7λ1 to 1.5λ1.

[0028] A first inductor (and / or a second inductor) can be placed at a suitable position within the first slot, increasing the length of the first resonant circuit to 0.7λ1 to 1.5λ1. Compared to the conventional closed-slot resonant length of 0.5λ1, the antenna structure of this embodiment has a larger radiating aperture, and the electric field at each point of the first slot is in the same direction, expanding the effective radiation area and improving the overall radiation efficiency.

[0029] In some embodiments, the antenna structure includes a circuit board, and the first inductor, the second inductor, and the first capacitor can be integrated into the circuit board and connected to corresponding points on the metal frame using spring clips or thin metal wires.

[0030] In one possible implementation, the antenna structure further includes a second capacitor and a second feed point. The metal plate is also provided with a second slot. One end of the second slot shares a second grounding terminal with the first slot. The other end of the second slot is grounded to form a third grounding terminal. The second slot has a third side and a fourth side that are arranged opposite to each other along the width direction of the second slot. The third side is provided with a third access point, and the fourth side is provided with a fourth access point opposite to the third access point.

[0031] One end of the second capacitor is connected to the third access point, the other end of the second capacitor is connected to the positive terminal of the second feed point, the negative terminal of the second feed point is connected to the fourth access point, the distance between the second capacitor and the second grounding terminal is L3, the distance between the second capacitor and the third grounding terminal is L4, and L3 < L4.

[0032] When the antenna structure operates at a third frequency within the second operating frequency band, the second capacitor is in a third state, and a third resonant circuit is formed between the second ground terminal and the third ground terminal; the second operating frequency band has a different frequency range than the first operating frequency band.

[0033] When the antenna structure operates at the fourth frequency of the second operating frequency band, the second capacitor is in the fourth state, and a fourth resonant circuit is formed between the second feed point and the third ground terminal. The resonant frequencies of the third resonant circuit and the fourth resonant circuit are different. The reactance of the second capacitor in the third state is higher than that in the fourth state. The fourth frequency is higher than the third frequency.

[0034] The antenna structure provided in this application embodiment allows the antenna structure to operate in a second operating frequency band, thus enabling dual-frequency operation of the antenna structure.

[0035] The second capacitor exhibits different states (third state and fourth state) at different frequencies, forming the third resonant circuit and the fourth resonant circuit respectively. Moreover, the resonant frequencies of the two resonant circuits are different. In this way, the antenna structure can achieve dual resonance in the second operating frequency band, thereby realizing dual-frequency dual-resonance operation. The antenna structure can better adapt to signals of different frequencies, thus widening the antenna's operating frequency band and improving the antenna structure's radiation performance in multiple frequency bands.

[0036] In addition, the second slot shares a second grounding terminal with the first slot, which can reduce the number of grounding terminals, optimize the layout, save space, and reduce the size occupied by the antenna structure.

[0037] In one possible implementation, the wavelength of the second operating frequency band is λ2, and L3 ≤ 0.1λ2.

[0038] In the low-frequency mode (third frequency) of the second operating frequency band, the second capacitor is in the third state, and the third ground terminal and the second ground terminal form a third resonant circuit. The distance between the second feed point and the second ground terminal is no greater than 0.1 times the wavelength λ2 of the second operating frequency band, that is, the distance between the second feed point and the second ground terminal is much smaller than the wavelength of the second operating frequency band. When the antenna structure operates at the fourth frequency, the high-frequency electric field is concentrated in the region between the third ground terminal and the first feed point, which can improve the overall performance of the antenna structure.

[0039] In one possible implementation, the antenna structure further includes a third inductor disposed between the second feed point and the third ground terminal, with both ends of the third inductor connected to the third side and the fourth side, respectively, so that the electric field between the second ground terminal and the third inductor is in the same direction as the electric field between the third inductor and the third ground terminal.

[0040] A third inductor is placed between the second feed point and the third grounding terminal. The third inductor connects the third side and the fourth side, which makes the electric field between the second grounding terminal and the third inductor in the same direction as the electric field between the third inductor and the third grounding terminal, thereby increasing the radiation aperture of the antenna structure.

[0041] In some embodiments, the antenna structure may provide a first inductor (and a second inductor) only in the first slit, or a third inductor only in the second slit. Alternatively, a first inductor (and a second inductor) and a third inductor may be provided in both the first and second slits.

[0042] In one possible implementation, the antenna structure further includes a fourth inductor disposed between the third inductor and the third ground terminal, with both ends of the fourth inductor connected to the third side and the fourth side, respectively, so that the electric fields between the second ground terminal and the third inductor, the electric fields between the third inductor and the fourth inductor, and the electric fields between the fourth inductor and the third ground terminal are in the same direction.

[0043] Adding a fourth inductor can create a longer antenna structure with the electric field pointing in the same direction everywhere, thus further improving the effective radiating aperture of the antenna structure.

[0044] In some embodiments, the antenna structure may have a first inductor (and a second inductor) provided only in the first slot, or a third inductor (and a fourth inductor) provided only in the second slot. Alternatively, the first inductor (and the second inductor) and the third inductor (and the fourth inductor) may be provided simultaneously in the first slot and the second slot, respectively.

[0045] In some embodiments, the second gap may also be provided with inductors other than the third and fourth inductors, that is, the second gap may be provided with one, two, three, four or even more inductors.

[0046] In one possible implementation, the antenna structure further includes a filter assembly connecting the first feed point and the second feed point. The filter assembly is used to feed electrical signals from the first operating frequency band of the communication module into the first gap and to feed electrical signals from the second operating frequency band of the communication module into the second gap.

[0047] In some embodiments, the filter assembly includes a first filter and a second filter, both of which are band-stop filters. The two poles of the first filter are connected to the first side and the second side of the first slot, respectively. The first filter is disposed between the first ground terminal and the first feed point, and the connection positions of the first filter and the two sides of the first slot are close to the first feed point. The second filter is disposed on the signal line. The first filter and the second filter work together to enable electrical signals from the first operating frequency band of the communication module to be fed only into the first slot and not into the second slot, and to enable electrical signals from the second operating frequency band of the communication module to be fed only into the second slot and not into the first slot.

[0048] In some embodiments, the filter assembly may include a first filter and a third filter, wherein the first filter is a band-stop filter and the third filter is a band-pass filter. The two poles of the first filter are connected to the first side and the second side of the first slot, respectively. The first filter is disposed between the first ground terminal and the first feed point, and the connection position of the first filter to the two sides of the first slot is close to the first feed point. The second filter is disposed on the signal line. The first filter and the second filter work together to enable the electrical signal from the first operating frequency band of the communication module to be fed only into the first slot and not into the second slot, and to enable the electrical signal from the second operating frequency band of the communication module to be fed only into the second slot and not into the first slot.

[0049] In a second aspect, an electronic device is provided, including a grounding element and the aforementioned antenna structure, wherein a first grounding terminal and a second grounding terminal of the antenna structure are both connected to the grounding element. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0051] Figure 2 This is a schematic diagram of the structure of a metal plate provided in an embodiment of this application.

[0052] Figure 3 yes Figure 2 The diagram shows another view of the metal plate's structure.

[0053] Figure 4 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in an embodiment of this application when it operates at a first frequency in a first operating frequency band.

[0054] Figure 5 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in an embodiment of this application when it operates at a second frequency in the first operating frequency band.

[0055] Figure 6 This is a schematic diagram of an antenna structure provided in another embodiment of this application.

[0056] Figure 7 This is a schematic diagram illustrating the principle of simulating boundary conditions using inductance.

[0057] Figure 8 This is a schematic diagram of an antenna structure provided in another embodiment of this application.

[0058] Figure 9 This is a schematic diagram of the structure of a metal plate provided in another embodiment of this application.

[0059] Figure 10 yes Figure 9 The diagram shows another view of the metal plate's structure.

[0060] Figure 11 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at a third frequency in the second operating frequency band.

[0061] Figure 12 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at the fourth frequency of the second operating frequency band.

[0062] Figure 13 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at a first frequency in a first operating frequency band.

[0063] Figure 14 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at a second frequency in the first operating frequency band.

[0064] Figure 15 This is a schematic diagram of an antenna structure provided in another embodiment of this application.

[0065] Figure 16 This is a schematic diagram of an antenna structure provided in another embodiment of this application.

[0066] Figure 17 This is a schematic diagram of the return loss of an antenna structure provided in one embodiment of this application.

[0067] Figure 18 This is a schematic diagram illustrating the efficiency of an antenna structure provided in one embodiment of this application.

[0068] Figure 19 This is a schematic diagram of the radiation direction of an antenna structure provided in one embodiment of this application.

[0069] Figure 20 This is a schematic diagram and Smith chart of the return loss of an antenna structure provided in another embodiment of this application.

[0070] Figure 21 This is a schematic diagram illustrating the efficiency of an antenna structure provided in another embodiment of this application.

[0071] Figure 22 This is a schematic diagram of the radiation direction of an antenna structure provided in another embodiment of this application.

[0072] Figure 23 yes Figure 15 The diagram shows the return loss of the antenna structure operating at 2.4 GHz and 5 GHz.

[0073] Figure 24 yes Figure 15 The antenna structure shown operates at 2.4 GHz and 5 GHz according to the Smith chart.

[0074] Figure 25 yes Figure 15 The diagram shows the efficiency of the antenna structure operating at 2.4 GHz and 5 GHz.

[0075] Figure 26 This is a schematic diagram of an antenna structure provided in another embodiment of this application.

[0076] Figure 27 yes Figure 26 The diagram shows the return loss of the antenna structure operating at 2.4 GHz and 5 GHz.

[0077] Figure 28 yes Figure 26 The diagram shows the efficiency of the antenna structure operating at 2.4 GHz and 5 GHz.

[0078] Figure 29 yes Figure 16 The diagram shows the return loss of the antenna structure operating at 2.4 GHz and 5 GHz.

[0079] Figure 30 yes Figure 16 The antenna structure shown operates at 2.4 GHz and 5 GHz according to the Smith chart.

[0080] Figure 31 yes Figure 16 The diagram shows the efficiency of the antenna structure operating at 2.4 GHz and 5 GHz.

[0081] Figure 32 yes Figure 16 The diagram shows the radiation direction of the antenna structure operating at 2.4 GHz and 5 GHz.

[0082] Figure label:

[0083] 1000, Electronic device; 100, Display screen; 200, Bezel; 300, Back cover;

[0084] 1. Metal plate; 11. First gap; 111. First side surface; 112. Second side surface; 121. First access point; 122. Second access point; 13. Second gap; 131. Third side surface; 132. Fourth side surface; 141. Third access point; 142. Fourth access point; 15. Second grounding terminal; 16. First grounding terminal; 17. Third grounding terminal; 181. First feed point; 1811. Positive terminal; 1812. Negative terminal; 182. Second feed point; 1821. Positive terminal; 1822. Negative terminal;

[0085] 21. First capacitor; 22. Second capacitor;

[0086] 31. First inductor; 32. Second inductor; 33. Third inductor; 34. Fourth inductor;

[0087] 41. First connecting end; 42. Second connecting end; 43. Third connecting end;

[0088] 5. Filter assembly; 51. First filter; 52. Second filter; 53. Third filter;

[0089] S1, first resonant circuit; S2, second resonant circuit; S3, third resonant circuit; S4, fourth resonant circuit. Detailed Implementation

[0090] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0091] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0092] In the description of this application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc., indicate the orientation or positional relationship based on the installation orientation or positional relationship, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0093] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0094] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0095] The following explains the terminology that may appear in the embodiments of this application.

[0096] Coupling can be understood as direct coupling and / or indirect coupling. "Coupled connection" can be understood as a direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection," which can be understood as physical contact and electrical conduction between components; it can also be understood as the form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Indirect coupling" can be understood as electrical conduction between two conductors through a gap / non-contact method. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between the gaps between two conductive components.

[0097] Connection / linking: can refer to a mechanical or physical connection. For example, A and B being connected or linked can mean that there are fasteners (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate. It can also mean that A and B are detachably connected.

[0098] Capacitor: can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitance) refers to the equivalent capacitance formed by two conductive components separated by a certain gap.

[0099] Resonant / Resonant Frequency: The resonant frequency is also called the resonance frequency. It refers to the frequency at which the imaginary part of the antenna's input impedance is zero. The resonant frequency can have a range, that is, the range of frequencies where resonance occurs. The frequency corresponding to the point of strongest resonance is the center frequency. The return loss characteristic at the center frequency can be less than -20dB.

[0100] Resonant band / communication band / operating band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting the B40 band operates within the frequency range of 2300MHz to 2400MHz, or in other words, the antenna's operating band includes the B40 band. The frequency range that meets the specifications can be considered the antenna's operating band.

[0101] Electrical length: This can refer to the ratio of physical length (i.e., mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. Electrical length can satisfy the following formula:

[0102]

[0103] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0104] Wavelength: or operating wavelength, can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the operating frequency band supported by the antenna. For example, assuming the center frequency of the B1 uplink band (resonant frequency from 1920MHz to 1980MHz) is 1955MHz, then the operating wavelength can be the wavelength calculated using this frequency. Not limited to the center frequency, "operating wavelength" can also refer to the wavelength corresponding to the non-center frequency of the resonant frequency or operating frequency band.

[0105] It should be understood that the wavelength of a radiation signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiation signal (MHz), and the speed of light can be taken as 3 × 10⁸ m / s. The wavelength of a 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 this application typically refers to the medium wavelength, which can be the medium wavelength corresponding to the center frequency of the resonant frequency, or the medium wavelength corresponding to the center frequency of the operating frequency band supported by the antenna. For example, assuming the center frequency of the B1 uplink band (resonant frequency of 1920MHz to 1980MHz) is 1955MHz, then the wavelength can be the medium wavelength calculated using this frequency. Not limited to the center frequency, the "medium wavelength" can also refer to the medium wavelength corresponding to the non-center frequency of the resonant frequency or operating frequency band. For ease of understanding, the medium wavelength mentioned in the embodiments of this application can be simply calculated using the relative permittivity of the medium filling one or more sides of the radiator.

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

[0107] The limitations mentioned in the embodiments of this application, such as symmetry (e.g., axial symmetry, or central symmetry), parallelism, perpendicularity, and similarity (e.g., same length, same width, same structure, etc.), are all relative to the current technological level, and are not absolutely strict definitions in a mathematical sense. For example, there may be a predetermined angle (e.g., ±5°, ±10°) deviation between two mutually parallel or perpendicular antenna elements.

[0108] Antenna radiation efficiency refers to the ratio of the power radiated into space by an antenna (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Active power input to the antenna = antenna input power - loss power; loss power mainly includes return loss power and ohmic loss power of metals and / or dielectric loss power. Radiation efficiency is a measure of an antenna's radiation capability; metal loss and dielectric loss are both factors affecting radiation efficiency.

[0109] Those skilled in the art will understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0dB, the better the efficiency of the antenna.

[0110] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port after passing through the antenna circuit to the transmit power at the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the higher the antenna's radiation efficiency. Conversely, the larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the antenna's radiation efficiency.

[0111] Antenna return loss can be represented by the S11 parameter, which is one of the S-parameters. S11 represents the reflection coefficient, and this parameter characterizes the antenna's transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the less energy the antenna reflects back, which means more energy actually enters the antenna, and the higher the antenna's system efficiency. Conversely, the larger the S11 parameter, the greater the antenna return loss, and the lower the antenna's system efficiency.

[0112] It should be noted that in engineering, an S11 value of -6dB is generally used as the standard. When the S11 value of an antenna is less than -6dB, the antenna can be considered to be working normally, or the antenna can be considered to have good transmission efficiency.

[0113] Ground (GND): can generally refer to at least a portion of any grounding layer, ground plane, or grounding metal layer within an electronic device (such as a mobile phone), or at least a portion of any combination of any of the aforementioned grounding layers, ground planes, or grounding components. "Ground" can be used for grounding components within an electronic device. In one embodiment, "ground" can be the grounding layer of the electronic device's circuit board, or a grounding metal layer formed by a ground plane formed within the frame of the electronic device or a metal film formed beneath the screen.

[0114] Grounding: refers to coupling with the aforementioned ground / floor in any way. In one embodiment, grounding can be achieved through physical grounding, such as through a structural component of the mid-frame to achieve a physical ground at a specific location on the frame (or, physical ground). In another embodiment, grounding can be achieved through device grounding, such as through devices like capacitors / inductors / resistors connected in series or parallel (or, device ground).

[0115] With the rapid development of mobile communication technology, people have increasingly stringent requirements for the performance and appearance of electronic devices (such as smartphones, tablets, and smart wearable devices). As a key component for enabling wireless communication functions in electronic devices, antenna design plays a crucial role in the overall performance of the device.

[0116] Furthermore, considering the performance requirements of the antenna structure, traditional designs involve creating multiple slots in the metal frame of the product, forming a slotted frame antenna structure. These slots can improve the radiation characteristics of the antenna structure. However, this approach has many drawbacks. From an aesthetic perspective, multiple slots disrupt the original continuity and integrity of the metal frame, making the device lack visual cohesion and symmetry, failing to meet users' aesthetic preferences. In terms of manufacturing processes, creating slots requires precise machining techniques and complex processes, which not only increases the difficulty of production but also leads to longer production cycles, further increasing manufacturing costs.

[0117] The continuous-slotted frame antenna structure has become a research hotspot in antenna design in recent years due to its unique advantages in maintaining the integrity of the device's appearance and improving structural strength. It avoids the aesthetic defects caused by slots and seams, allowing for a smoother, more refined appearance that meets users' high demands for the design of electronic devices. At the same time, the continuous metal frame is structurally more robust, better protecting the delicate components inside the device and improving its durability.

[0118] However, current antenna structures with continuous slots have poorer radiation characteristics than those with broken slots, affecting the communication performance of electronic devices.

[0119] Based on this, embodiments of this application provide an antenna structure and an electronic device that can improve the radiation characteristics of a non-seamless frame antenna structure, thereby helping to improve the communication performance of the electronic device.

[0120] Figure 1 This is a schematic diagram of the structure of the electronic device 1000 provided in an embodiment of this application. (Refer to...) Figure 1 The electronic device 1000 provided in this application includes a display screen 100. In one embodiment, the display screen 100 may include a liquid crystal display (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and the embodiments of this application do not limit this.

[0121] The electronic device 1000 also includes a bezel 200, the edges of which can be connected to the edges of the display screen 100. The bezel 200 may have four sides surrounding the display screen 100 to help secure the display screen 100. In one implementation, the bezel 200 made of metal can be directly used as the metal bezel 200 of the electronic device 1000, forming the appearance of the metal bezel 200, which is suitable for industrial design (ID).

[0122] The electronic device 1000 also includes a back cover 300, the edge of which can be connected to the edge of the frame 200 to form the housing of the electronic device 1000.

[0123] In some embodiments, the electronic device 1000 further includes a mid-frame plate disposed inside the electronic device 1000 and parallel to the rear cover 300. The mid-frame plate is typically used to fabricate structures such as circuit boards within the electronic device 1000, serving a supporting function for the entire device. In some embodiments, the mid-frame plate can be integrally formed with the frame 200.

[0124] Figure 2 This is a schematic diagram of the structure of the metal plate 1 provided in an embodiment of this application; Figure 3 yes Figure 2 Another perspective structural diagram of the metal plate 1 shown; Figure 4 This is a schematic diagram of the cross-sectional electric field of the antenna structure provided in this application embodiment when it operates at a first frequency in the first operating frequency band; Figure 5 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in an embodiment of this application when it operates at a second frequency in the first operating frequency band.

[0125] Reference Figures 2 to 5The antenna structure of the electronic device 1000 provided in this application embodiment includes a first capacitor 21, a first feed point 181, and a first slot 11 formed on a metal plate 1. The two ends of the first slot 11 are grounded to form a first ground terminal 16 and a second ground terminal 15. The first slot 11 has a first side surface 111 and a second side surface 112 disposed opposite to each other along the width direction of the first slot 11. A first access point 121 is provided on the first side surface 111, and a second access point 122 is provided on the second side surface 112 opposite to the first access point 121. One end of the first capacitor 21 is connected to the first access point 121, and the other end of the first capacitor 21 is connected to the positive terminal 1811 of the first feed point 181. The negative terminal 1812 of the first feed point 181 and the second access point 122 are connected to the first access point 121. The connection point 122 is connected. The distance between the first capacitor 21 and the first ground terminal 16 is L1, and the distance between the first capacitor 21 and the second ground terminal 15 is L2, where L1 > L2. When the antenna structure operates at the first frequency of the first operating frequency band, the first capacitor 21 is in the first state, and a first resonant circuit S1 is formed between the first ground terminal 16 and the second ground terminal 15. When the antenna structure operates at the second frequency of the first operating frequency band, the first capacitor 21 is in the second state, and a second resonant circuit S2 is formed between the first ground terminal 16 and the first feed point 181. The resonant frequencies of the first resonant circuit S1 and the second resonant circuit S2 are different. The reactance of the first capacitor in the first state is greater than that in the second state, and the second frequency is higher than the first frequency.

[0126] It should be noted that in some embodiments, the metal plate 1 can be the aforementioned mid-frame plate. In other embodiments, the metal plate 1 of the antenna structure is the rear cover 300 of the electronic device. The metal plate 1 can be connected to the grounding component of the electronic device 1000, and the electronic device 1000 may also have other ground planes / grounding layers.

[0127] It should be noted that the first feed point 181 can be connected to the communication module of the electronic device 1000, and the communication module of the electronic device 1000 can be fed through the first capacitor 21. Furthermore, the electronic device 1000 may include a lumped component (LUMP), which is a circuit element whose geometric dimensions are much smaller than the operating wavelength of the circuit. Its electromagnetic characteristics (resistance, capacitance, inductance L) can be considered as concentrated at a "point" inside the component, without considering the electromagnetic field distribution inside or around the component. In this embodiment, the first capacitor 21 may be part of the lumped component.

[0128] It should be noted that the first capacitor 21 being in the first state means that at the first frequency of the first operating frequency band, the first capacitor 21 exhibits a high reactance and is not fully turned on. The first capacitor 21 being in the second state means that at the second frequency of the first operating frequency band, the first capacitor 21 exhibits a low reactance. The second state of the first capacitor 21 can be considered equivalent to the conducting state of the capacitor, and the first capacitor 21 can provide the short-circuit boundary condition corresponding to resonance.

[0129] It should be noted that the first and second states of the first capacitor 21 can change the boundary conditions of the first slot 11. When the first capacitor 21 is in the first state, the first slot 11 only has the first ground terminal 16 and the second ground terminal 15. At this time, the electric field is concentrated between the first ground terminal 16 and the second ground terminal 15, and a first resonant circuit S1 is formed between the first ground terminal 16 and the second ground terminal 15. When the first capacitor 21 is in the second state, it is equivalent to forming a new ground terminal between the first ground terminal 16 and the second ground terminal 15. At this time, the electric field is concentrated between the first ground terminal 16 and the first feed point 181, and a second resonant circuit S2 is formed between the first ground terminal 16 and the first feed point 181, realizing the dual resonance of the antenna structure.

[0130] It should be noted that the first operating frequency band can be 2.4 GHz or 5 GHz. In some embodiments, the first operating frequency band can also be 6 GHz. This application does not impose any restrictions on the embodiments.

[0131] The antenna structure provided in this application embodiment has the following characteristics: at a first frequency in the first operating frequency band, the first capacitor 21 is in a first state, and a first resonant circuit S1 is formed between the first ground terminal 16 and the second ground terminal 15; at a second frequency (higher than the first frequency), the first capacitor 21 is in a second state, and a second resonant circuit S2 is formed between the first ground terminal 16 and the first feed point 181. The antenna structure automatically adjusts the characteristics of the resonant circuit according to different frequencies, so that the antenna structure can have a better radiation effect at different frequencies, thereby improving the adaptability of the antenna structure to signals of different frequencies.

[0132] The first capacitor 21 presents different states (first state and second state) at different frequencies, forming a first resonant circuit S1 and a second resonant circuit S2 respectively, and the resonant frequencies of the two resonant circuits are different. In this way, the antenna structure can achieve dual resonance in the first operating frequency band. Compared with the traditional antenna structure, the antenna structure of this embodiment can better adapt to signals of different frequencies, thereby widening the operating frequency band of the antenna and improving the radiation performance of the antenna structure in multiple frequency bands.

[0133] Due to the improved antenna radiation characteristics, the electronic device 1000 can more stably receive and transmit signals. Thus, the antenna structure can maintain good radiation performance under different frequency signals, reducing signal attenuation and interference, improving the stability and reliability of data transmission, and contributing to the enhanced communication performance of the electronic device 1000.

[0134] Figure 6 This is a schematic diagram of an antenna structure provided in another embodiment of this application. (Refer to...) Figure 6 In some embodiments, the antenna structure further includes a first inductor 31, which is disposed between the first ground terminal 16 and the first feed point 181, and the first inductor 31 is connected to the first side 111 and the second side 112 respectively, so that the electric field between the first ground terminal 16 and the first inductor 31 is in the same direction as the electric field between the first inductor 31 and the first feed point 181.

[0135] Figure 7 This is a schematic diagram illustrating the principle of inductor-simulated boundary conditions. Inductor-simulated boundary conditions are used to extract... Figure 7 The antenna structure in (a) and Figure 7 Part of the antenna structure in (b) can obtain Figure 7 The antenna structure in (c) and Figure 7 The antenna structure in (d) is then used to... Figure 7 The antenna structure in (c) is similar to... Figure 7 The antenna structures in (d) are spliced ​​together on one side with the same boundary conditions to obtain... Figure 7 The antenna structure in (e) can thus form a long antenna structure with the electric field in the same direction everywhere.

[0136] It should be noted that in some embodiments, the first inductor 31 can be an inductor, while in other embodiments, the first inductor 31 can be an equivalent distributed inductor. The first inductor 31 can be made of wound metal wire or composed of bent metal wire segments. The wound metal wire has inductive characteristics, thereby forming the first inductor 31.

[0137] A first inductor 31 is provided between the first ground terminal 16 and the first feed point 181. The first inductor 31 connects the first side 111 and the second side 112, which makes the electric fields formed in the region between the first ground terminal 16 and the first inductor 31 and the region between the first inductor 31 and the first feed point 181 in the same direction, thereby improving the radiation aperture of the antenna structure.

[0138] Compared with traditional half-wavelength resonant slots, the antenna structure provided in this application embodiment, which incorporates the first inductor 31, can improve efficiency by at least 1 dBi.

[0139] Figure 8This is a schematic diagram of an antenna structure provided in another embodiment of this application. (Refer to...) Figure 8 In some embodiments, the antenna structure further includes a second inductor 32, which is disposed between the first inductor 31 and the first feed point 181, and the second inductor 32 is connected to the first side 111 and the second side 112 respectively, so that the electric field between the first ground terminal 16 and the first inductor 31, the electric field between the first inductor 31 and the second inductor 32, and the electric field between the second inductor 32 and the first feed point 181 are in the same direction.

[0140] It should be noted that in some embodiments, the second inductor 32 can be an inductor, while in other embodiments, the second inductor 32 can be an equivalent distributed inductor. The second inductor 32 can be formed by winding metal wire or by bending metal wire segments. The wound metal wire has inductive characteristics, thereby forming the second inductor 32.

[0141] Adding a second inductor 32 is equivalent to splicing together a larger number of local antenna structures to obtain a longer overall antenna structure with the electric field in the same direction everywhere. This can further improve the effective radiation aperture of the antenna structure.

[0142] In some embodiments, the first gap 11 may also be provided with inductors other than the first inductor 31 and the second inductor 32, that is, the first gap 11 may be provided with one, two, three, four or even more inductors.

[0143] Figure 9 This is a schematic diagram of the structure of the metal plate 1 provided in another embodiment of this application; Figure 10 yes Figure 9 Another perspective structural diagram of the metal plate 1 shown; Figure 11 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at a third frequency in the second operating frequency band; Figure 12 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at the fourth frequency of the second operating frequency band.

[0144] Reference Figures 9 to 12The antenna structure also includes a second capacitor 22 and a second feed point 182. The metal plate 1 also has a second slot 13. One end of the second slot 13 shares a second grounding terminal 15 with the first slot 11, and the other end of the second slot 13 is grounded to form a third grounding terminal 17. The second slot 13 has a third side surface 131 and a fourth side surface 132 arranged opposite to each other along the width direction of the second slot 13. The third side surface 131 has a third access point 141, and the fourth side surface 132 has a fourth access point 142 opposite to the third access point 141. One end of the second capacitor 22 is connected to the third access point 141, and the other end of the second capacitor 22 is connected to the positive terminal 1821 of the second feed point 182. The negative terminal 1822 of the second feed point 182 is connected to the fourth access point 142. The distance between capacitor 22 and the second ground terminal 15 is L3, and the distance between the second capacitor 22 and the third ground terminal 17 is L4, where L3 < L4. When the antenna structure operates at the third frequency of the second operating frequency band, the second capacitor 22 is in the third state, and a third resonant circuit S3 is formed between the second ground terminal 15 and the third ground terminal 17. The frequency range of the second operating frequency band is different from that of the first operating frequency band. When the antenna structure operates at the fourth frequency of the second operating frequency band, the second capacitor 22 is in the fourth state, and a fourth resonant circuit S4 is formed between the second feed point 182 and the third ground terminal 17. The resonant frequencies of the third resonant circuit S3 and the fourth resonant circuit S4 are different. The reactance of the second capacitor in the third state is greater than that in the fourth state, and the fourth frequency is higher than the third frequency.

[0145] It should be noted that the second feed point 182 can be connected to the communication module of the electronic device 1000, and the communication module of the electronic device 1000 can be powered through the second capacitor 22. Furthermore, the electronic device 1000 may include lumped elements; in this embodiment, the first capacitor 21 and the second capacitor 22 may be part of the lumped elements.

[0146] It should be noted that the second capacitor 22 being in the third state means that at the third frequency of the second operating frequency band, the second capacitor 22 exhibits a higher reactance and is not fully turned on. The second capacitor 22 being in the fourth state means that at the fourth frequency of the second operating frequency band, the second capacitor 22 exhibits a lower reactance. The second state of the second capacitor 22 can be considered equivalent to the conducting state of the capacitor, and the second capacitor 22 can provide the short-circuit boundary condition corresponding to resonance.

[0147] It should be noted that the third and fourth states of the second capacitor 22 can change the boundary conditions of the second slot 13. When the second capacitor 22 is in the third state, the second slot 13 only has the third grounding terminal 17 and the second grounding terminal 15. At this time, the electric field is concentrated between the third grounding terminal 17 and the second grounding terminal 15, and a third resonant circuit S3 is formed between the third grounding terminal 17 and the second grounding terminal 15. When the second capacitor 22 is in the fourth state, it is equivalent to forming a new grounding terminal between the third grounding terminal 17 and the second grounding terminal 15. At this time, the electric field is concentrated between the third grounding terminal 17 and the second feed point 182, and a fourth resonant circuit S4 is formed between the third grounding terminal 17 and the second feed point 182, realizing the dual resonance of the antenna structure.

[0148] It should be noted that the frequency ranges of the first operating frequency band and the second operating frequency band are different. For example, the first operating frequency band can be 2.4 GHz and the second operating frequency band can be 5 GHz, or the first operating frequency band is 5 GHz and the second operating frequency band is 2.4 GHz, or the first operating frequency band is 2.4 GHz and the second operating frequency band is 6 GHz. This application embodiment does not impose any limitations here.

[0149] It should be noted that the width D of the second grounding terminal 15 can be selected according to design requirements, and this embodiment of the application does not impose any restrictions.

[0150] The antenna structure provided in this application embodiment allows the antenna structure to operate in a second operating frequency band, thus enabling dual-frequency operation of the antenna structure.

[0151] The second capacitor 22 presents different states (the third state and the fourth state) at different frequencies, forming the third resonant circuit S3 and the fourth resonant circuit S4 respectively. The resonant frequencies of the two resonant circuits are different. In this way, the antenna structure can achieve dual resonance in the second operating frequency band, thereby realizing dual-frequency dual-resonance operation. The antenna structure can better adapt to signals of different frequencies, thereby widening the operating frequency band of the antenna and improving the radiation performance of the antenna structure in multiple frequency bands.

[0152] In addition, the second slot 13 shares the second grounding terminal 15 with the first slot 11, which can reduce the number of grounding terminals, optimize the layout, save space, and reduce the size occupied by the antenna structure.

[0153] Figure 13 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at a first frequency in a first operating frequency band; Figure 14 This is a schematic diagram of the cross-sectional electric field of an antenna structure provided in another embodiment of this application when it operates at a second frequency in the first operating frequency band. (Refer to...) Figure 13In this embodiment, when the antenna structure operates at a first frequency within a first operating frequency band, the electric field is concentrated between the first ground terminal 16 and the second ground terminal 15. (Refer to...) Figure 14 When the antenna structure operates at the second frequency of the first operating frequency band, the electric field is concentrated between the first ground terminal 16 and the first feed point 181. (Refer to...) Figure 18 When the antenna structure operates at the third frequency of the second operating frequency band, the electric field is concentrated between the second ground terminal 15 and the third ground terminal 17. (Refer to...) Figure 11 When the antenna structure operates at the fourth frequency of the second operating frequency band, the electric field is concentrated between the second feed point 182 and the third ground terminal 17.

[0154] Figure 15 This is a schematic diagram of an antenna structure provided in another embodiment of this application. (Refer to...) Figure 15 In some embodiments, the antenna structure further includes a third inductor 33, which is disposed between the second feed point 182 and the third ground terminal 17, and the two ends of the third inductor 33 are connected to the third side surface 131 and the fourth side surface 132 respectively, so that the electric field between the second ground terminal 15 and the third inductor 33 is in the same direction as the electric field between the third inductor 33 and the third ground terminal 17.

[0155] It should be noted that in some embodiments, the third inductor 33 can be an inductor, while in other embodiments, the third inductor 33 can be an equivalent distributed inductor. The third inductor 33 can be formed by winding metal wire or by bending metal wire segments. The wound metal wire has inductive characteristics, thereby forming the third inductor 33.

[0156] A third inductor 33 is provided between the second feed point 182 and the third ground terminal 17. The third inductor 33 connects the third side 131 and the fourth side 132, which makes the electric field between the second ground terminal 15 and the third inductor 33 in the same direction as the electric field between the third inductor 33 and the third ground terminal 17, thereby increasing the radiation aperture of the antenna structure.

[0157] In some embodiments, the antenna structure may provide a first inductor 31 (and a second inductor 32) only in the first slot 11, or a third inductor 33 only in the second slot 13. Alternatively, the first inductor 31 (and the second inductor 32) and the third inductor 33 may be provided simultaneously in the first slot 11 and the second slot 13.

[0158] Figure 16 This is a schematic diagram of an antenna structure provided in another embodiment of this application. (Refer to...) Figure 16The antenna structure also includes a fourth inductor 34, which is disposed between the third inductor 33 and the third ground terminal 17. The two ends of the fourth inductor 34 are connected to the third side 131 and the fourth side 132 respectively, so that the electric fields between the second ground terminal 15 and the third inductor 33, the electric fields between the third inductor 33 and the fourth inductor 34, and the electric fields between the fourth inductor 34 and the third ground terminal 17 are in the same direction.

[0159] It should be noted that in some embodiments, the fourth inductor 34 can be an inductor, while in other embodiments, the fourth inductor 34 can be an equivalent distributed inductor. The fourth inductor 34 can be formed by winding metal wire or by bending metal wire segments. The wound metal wire has inductive characteristics, thus forming the fourth inductor 34.

[0160] Adding a fourth inductor 34 can create an antenna structure that is longer and has the same electric field direction everywhere, thus further improving the effective radiation aperture of the antenna structure.

[0161] In some embodiments, the antenna structure may have a first inductor 31 (and a second inductor 32) provided only in the first slot 11, or a third inductor 33 (and a fourth inductor 34) provided only in the second slot 13. Of course, the first inductor 31 (and the second inductor 32) and the third inductor 33 (and the fourth inductor 34) may be provided simultaneously in the first slot 11 and the second slot 13.

[0162] In some embodiments, the second gap 13 may also be provided with inductors other than the third inductor 33 and the fourth inductor 34, that is, the second gap 13 may be provided with one, two, three, four or even more inductors.

[0163] In some embodiments, the inductance of the first inductor 31 is 0.5nH to 2nH.

[0164] Setting the inductance of the first inductor 31 to 0.5nH to 2nH allows for the formation of a unidirectional electric field between the first ground terminal and the first feed point 181 of 16, thereby increasing the radiation aperture of the antenna structure.

[0165] In some embodiments, the inductance of the second inductor 32 is 0.5nH to 2nH.

[0166] In some embodiments, when the first operating frequency band is 2.4 GHz, the inductance of the first inductor 31 can be 1 nH to 2 nH, and the inductance of the second inductor 32 can be 1 nH to 2 nH; when the first operating frequency band is 5 GHz, the inductance of the first inductor 31 can be 0.5 nH to 1.5 nH, and the inductance of the second inductor 32 can be 0.5 nH to 1.5 nH.

[0167] In some embodiments, the inductance of the third inductor 33 is 0.5nH to 2nH.

[0168] Setting the inductance of the third inductor 33 to 0.5nH to 2nH allows for the formation of a unidirectional electric field between the second ground terminal 15 and the third ground terminal 17, thereby increasing the radiation aperture of the antenna structure.

[0169] In some embodiments, the inductance of the fourth inductor 34 is 0.5nH to 2nH.

[0170] In some embodiments, when the first operating frequency band is 2.4 GHz, the inductance of the third inductor 33 can be 1 nH to 2 nH, and the inductance of the fourth inductor 34 can be 1 nH to 2 nH; when the first operating frequency band is 5 GHz, the inductance of the third inductor 33 can be 0.5 nH to 1.5 nH, and the inductance of the fourth inductor 34 can be 0.5 nH to 1.5 nH.

[0171] In some embodiments, the capacitance of the first capacitor 21 is 0.1pF to 2pF.

[0172] The capacitance of the first capacitor 21 is set to 0.1pF to 2pF. It can be fed through the coupling of the first capacitor 21, and can form a first resonant circuit S1 when the antenna structure operates at the first frequency of the first operating frequency band, and form a second resonant circuit S2 when the antenna structure operates at the second frequency of the first operating frequency band.

[0173] In some embodiments, when the first operating frequency band is 2.4 GHz, the capacitance of the first capacitor 21 is 0.2 pF to 2 pF; when the first operating frequency band is 5 GHz, the capacitance of the first capacitor 21 is 0.1 pF to 1 pF.

[0174] In some embodiments, the capacitance of the second capacitor 22 is 0.1pF to 2pF.

[0175] By setting the capacitance of the second capacitor 22 to 0.1pF to 2pF, power can be fed through the second capacitor 22, and the antenna structure can form a third resonant circuit S3 when operating at the third frequency of the second operating frequency band, and form a fourth resonant circuit S4 when operating at the fourth frequency of the second operating frequency band.

[0176] In some embodiments, when the second operating frequency band is 2.4 GHz, the capacitance of the second capacitor 22 is 0.2 pF to 2 pF; when the second operating frequency band is 5 GHz, the capacitance of the second capacitor 22 is 0.1 pF to 1 pF.

[0177] In some embodiments, the wavelength of the first operating frequency band is λ1. A first inductor 31 (and / or a second inductor 32) can be placed at a suitable position within the first slot 11, increasing the length of the first resonant circuit S1 to 0.7λ1 to 1.5λ1. Compared to the conventional closed-slot resonant length of 0.5λ1, the antenna structure of this embodiment has a larger radiating aperture, and the electric field at all points of the first slot 11 is in the same direction, expanding the effective radiation area and improving the overall radiation efficiency.

[0178] In some embodiments, the length of the second resonant circuit S2 is 0.7λ1 to 1.5λ1. This effectively expands the radiation performance of the antenna structure.

[0179] In some embodiments, the length of the third resonant circuit S3 is 0.7λ2 to 1.5λ2, and the length of the fourth resonant circuit S4 is 0.7λ2 to 1.5λ2.

[0180] In some embodiments, the antenna structure includes a circuit board, and the first inductor 31, the second inductor 32 and the first capacitor 21 can be integrated into the circuit board and connected to corresponding points of the metal frame using springs or thin metal wires.

[0181] In some embodiments, the wavelength of the first operating frequency band is λ1, and L2 ≤ 0.1λ1.

[0182] It should be noted that the wavelength λ1 of the first operating frequency band is the dielectric wavelength of the antenna structure environment.

[0183] In the low-frequency mode (first frequency) of the first operating frequency band, the first capacitor 21 is in the first state, and the first capacitor 21 is not fully turned on. The first ground terminal 16 and the second ground terminal 15 form the first resonant circuit S1. The distance between the first feed point 181 and the second ground terminal 15 is not greater than 0.1 of the wavelength λ1 of the first operating frequency band. That is, the distance between the first feed point 181 and the second ground terminal 15 is much smaller than the wavelength of the first operating frequency band. When the antenna structure operates at the second frequency, the high-frequency electric field is concentrated in the region between the first ground terminal 16 and the first feed point 181, which can improve the overall performance of the antenna structure.

[0184] In some embodiments, the wavelength of the second operating frequency band is λ2, and L3 ≤ 0.1λ2.

[0185] It should be noted that the wavelength λ2 of the second operating frequency band is the dielectric wavelength of the antenna structure environment.

[0186] It should be noted that the frequency range of the second operating frequency band is different from that of the first operating frequency band, and the wavelength λ2 of the second operating frequency band is not equal to the wavelength λ1 of the first operating frequency band.

[0187] In the low-frequency mode (third frequency) of the second operating frequency band, the second capacitor 22 is in the third state, and the third ground terminal 17 and the second ground terminal 15 form the third resonant circuit S3. The distance between the second feed point 182 and the second ground terminal 15 is not greater than 0.1 times the wavelength λ2 of the second operating frequency band, that is, the distance between the second feed point 182 and the second ground terminal 15 is much smaller than the wavelength of the second operating frequency band. When the antenna structure operates at the fourth frequency, the high-frequency electric field is concentrated in the region between the third ground terminal 17 and the first feed point 181, which can improve the overall performance of the antenna structure.

[0188] In some embodiments, the antenna structure further includes a filter assembly 5, which is connected to a first feed point 181 and a second feed point 182. The filter assembly 5 is used to feed electrical signals from a first operating frequency band of the communication module into a first slot 11 and to feed electrical signals from a second operating frequency band of the communication module into a second slot 13.

[0189] It should be noted that filter component 5 may include a bandpass filter and a bandstop filter. A bandpass filter is a frequency-selective filter whose core function is to allow signals in a specific frequency band to pass through while attenuating or suppressing signals outside that band. A bandstop filter is a frequency-selective device with the opposite function to a bandpass filter; its core function is to suppress or attenuate signals in a specific frequency band while allowing signals outside that band to pass through. The bandpass and bandstop filters can work together to ensure that electrical signals from the first operating frequency band of the communication module are fed only into the first slot 11 and not into the second slot 13, and that electrical signals from the second operating frequency band of the communication module are fed only into the second slot 13 and not into the first slot 11.

[0190] Reference Figure 15 In some embodiments, the first feed point 181 and the second feed point 182 of the antenna structure are connected to the communication module of the electronic device 1000 via signal lines. For example, the first feed point 181 is connected to the first connection terminal 41 of the signal line, the second feed point 182 is connected to the second connection terminal 42 of the signal line, and the third connection terminal 43 of the signal line is connected to the communication module. A filter assembly may be disposed on the signal line, on the first slot 11, and / or on the second slot 13. For example, refer to... Figure 15The filter assembly 5 includes a first filter 51 and a second filter 52. Both the first filter 51 and the second filter 52 are band-stop filters. The two poles of the first filter 51 are connected to the first side 111 and the second side 112 of the first slot 11, respectively. The first filter 51 is disposed between the first ground terminal 16 and the first feed point 181, and the connection position of the first filter 51 to the two sides of the first slot 11 is close to the first feed point 181. The second filter 52 is disposed on the signal line. The first filter 51 and the second filter 52 work together to ensure that the electrical signal from the first operating frequency band of the communication module can be fed into the first slot 11 but not into the second slot 13, and that the electrical signal from the second operating frequency band of the communication module can be fed into the second slot 13 but not into the first slot 11.

[0191] Corresponding to Figure 8 The antenna structure shown has a first slot 11 but no second slot 13.

[0192] Corresponding to Figure 8 In some embodiments of the antenna structure shown, the first operating frequency band can be 2.4 GHz. In this case, the length H1 of the first slot 11 can be 69 mm, the width of the first slot 11 can be 1.2 mm, the inductance of the first inductor 31 and the second inductor 32 can both be 1.4 nH, and the capacitance of the first capacitor 21 is 0.3 pF.

[0193] Figure 17 This is a schematic diagram of the return loss of an antenna structure provided in one embodiment of this application. (Refer to...) Figure 17 In this embodiment, Figure 8 The antenna structure shown has two resonant points in the 2.4 GHz operating frequency band, and this antenna structure can generate dual resonance in the 2.4 GHz operating frequency band.

[0194] Figure 18 This is a schematic diagram illustrating the efficiency of an antenna structure provided in one embodiment of this application. (Refer to...) Figure 18 , Figure 8 The antenna structure shown operates at 2.4 GHz. The radiation efficiency curve in the 2.3 GHz-2.6 GHz band is relatively flat. Between 2.39005 GHz and 2.50783 GHz, the system efficiency is relatively high, and the operating bandwidth with a system efficiency greater than -4.5 dBi is 140 MHz. This indicates that the radiation performance of this antenna structure in the 2.4 GHz operating band meets the design requirements and can effectively radiate energy.

[0195] Figure 19 This is a schematic diagram of the radiation direction of an antenna structure provided in one embodiment of this application. Figure 19 (a) in the text shows Figure 8The antenna structure shown radiates at a low frequency (first frequency) of 2.4 GHz. Figure 19 (b) in the image shows... Figure 8 The antenna structure shown has a radiation pattern at a high frequency (second frequency) of 2.4 GHz. Figure 19 (a) and Figure 19 The radiation pattern shown in (b) indicates that the antenna structure of this embodiment can meet the user's needs.

[0196] Corresponding to Figure 8 In some embodiments of the antenna structure shown, the first operating frequency band can be 5GHz. In this case, the length H1 of the first slot 11 can be 30.7mm, the width of the first slot 11 can be 1.2mm, the inductance of the first inductor 31 and the second inductor 32 can both be 0.5nH, and the capacitance of the first capacitor 21 is 0.1pF.

[0197] Figure 20 This is a schematic diagram and Smith chart of the return loss of an antenna structure provided in another embodiment of this application. Figure 20 (a) in the text is Figure 8 The diagram shown illustrates the return loss of the antenna structure operating in the 5GHz band. Figure 20 (b) in the middle is Figure 8 The Smith chart shown shows the antenna structure operating in the 5GHz band. As can be seen from the figure, the antenna structure has two resonant points, and this antenna structure can generate dual resonance in the 5GHz operating band.

[0198] Figure 21 This is a schematic diagram illustrating the efficiency of an antenna structure provided in another embodiment of this application. (Refer to...) Figure 21 , Figure 8 When the antenna structure shown operates in the 5GHz band, the overall trend of the radiation efficiency curve in the 5GHz-6GHz band is relatively flat. Between 5.122444GHz and 5.863395GHz, the system efficiency is relatively high, and the operating bandwidth with a system efficiency greater than -4.5dBi is 740MHz. This indicates that the radiation performance of this antenna structure in the 5GHz operating band meets the design requirements and can effectively radiate energy.

[0199] Figure 22 This is a schematic diagram of the radiation direction of an antenna structure provided in another embodiment of this application. Figure 22 (a) in the text shows Figure 8 The antenna structure shown radiates at a low frequency (first frequency) of 5 GHz. Figure 22 (b) in the image shows... Figure 8 The antenna structure shown radiates at a high frequency (second frequency) of 5 GHz. Figure 22 (a) and Figure 22The radiation pattern shown in (b) indicates that the antenna structure of this embodiment can meet the user's needs.

[0200] Reference Figure 15 In this embodiment, the metal plate 1 is provided with a first gap 11 and a second gap 13, which are located in the same straight line direction. The first gap 11 and the second gap 13 share a second grounding terminal 15. The total length of the first gap 11 and the second gap 13 is 85mm, and the width of the first gap 11 and the second gap 13 is 1mm. The first gap 11 is provided with a first inductor 31 and a first capacitor 21. The inductance value of the first inductor 31 is 2nH, and the capacitance value of the first capacitor 21 is 1pF. The second gap 13 is provided with a third inductor 33 and a second capacitor 22. The inductance value of the third inductor 33 is 1nH, and the capacitance value of the second capacitor 22 is 0.5pF. A first filter 51 is provided between the first inductor 31 and the first feed point 181. The first filter 51 is a band-stop filter, and the first filter 51 is close to the first feed point 181. The second signal line 42 is provided with a second filter 52, which is also a band-stop filter. With the combined action of the first filter 51 and the second filter 52, when the antenna structure operates at 2.4 GHz, the electric field is concentrated in the region of the first slot 11, and when the antenna structure operates at 5 GHz, the electric field is concentrated in the region of the second slot 13.

[0201] Figure 23 yes Figure 15 The diagram shows the return loss of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 24 yes Figure 15 The antenna structure shown operates at 2.4 GHz and 5 GHz according to the Smith chart. Figure 23 (a) is a schematic diagram of the return loss of the antenna structure in this embodiment when it operates at 2.4 GHz. Figure 24 (a) is the Smith chart of the antenna structure in this embodiment operating at 2.4 GHz. Figure 23 (b) is a schematic diagram of the return loss of the antenna structure in this embodiment when it operates at 5 GHz. Figure 24 (b) is the Smith chart of the antenna structure in this embodiment operating at 5 GHz. See reference... Figure 23 (a) and Figure 24 In (a), the antenna structure has two resonant points when operating at 2.4 GHz, and this antenna structure can generate dual resonances in the 2.4 GHz operating frequency band. (See reference...) Figure 23 (b) and Figure 24 In (b), the antenna structure has two resonant points when operating at 5 GHz, and this antenna structure can generate dual resonance in the 5 GHz operating frequency band.

[0202] Figure 25 yes Figure 15 The diagram shows the efficiency of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 25 (a) is a schematic diagram of the efficiency of the antenna structure in this embodiment when it is operating at 2.4 GHz. The peak radiation efficiency is -3.8 dBi, and the operating bandwidth with a system efficiency greater than -4.5 dBi is 150 MHz. This shows that the radiation performance of this antenna structure in the 2.4 GHz operating frequency band meets the design requirements and can effectively radiate energy. Figure 25 (b) is a schematic diagram of the efficiency of the antenna structure in this embodiment when it operates at 5 GHz. The peak radiation efficiency is -3.1 dBi, and the operating bandwidth with a system efficiency greater than -4.5 dBi is 870 MHz. This shows that the radiation performance of this antenna structure in the 5 GHz operating frequency band meets the design requirements and can effectively radiate energy.

[0203] Figure 26 This is a schematic diagram of an antenna structure provided in another embodiment of this application. (Refer to...) Figure 26 In this embodiment, the metal plate 1 is provided with a first gap 11 and a second gap 13, which are arranged in the same straight direction. The first gap 11 and the second gap 13 share a second grounding terminal 15. The total length of the first gap 11 and the second gap 13 is 104mm, and the width of the first gap 11 and the second gap 13 is 1mm. The first gap 11 is provided with a first inductor 31, a second inductor 32, and a first capacitor 21. The inductance value of the first inductor 31 is 1.8nH. The inductance value of inductor 32 is 2nH, the capacitance value of the first capacitor 21 is 1pF, and the second slot 13 is provided with a third inductor 33 and a second capacitor 22. The inductance value of the third inductor 33 is 1nH, and the capacitance value of the second capacitor 22 is 0.5pF. A first filter 51, which is a band-stop filter, is provided between the second inductor 32 and the first feed point 181, and the first filter 51 is close to the first feed point 181. A second filter 52, which is also a band-stop filter, is provided on the signal line. Under the combined action of the first filter 51 and the second filter 52, when the antenna structure operates at 2.4GHz, the electric field is concentrated in the region of the first slot 11, and when the antenna structure operates at 5GHz, the electric field is concentrated in the region of the second slot 13.

[0204] Figure 27 yes Figure 26 The diagram shows the return loss of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 27 (a) is a schematic diagram of the return loss of the antenna structure in this embodiment when it operates at 2.4 GHz. Figure 27 (b) is a schematic diagram of the return loss of the antenna structure in this embodiment operating at 5 GHz. (Refer to...) Figure 27In (a), the antenna structure has two resonant points when operating at 2.4 GHz, and this antenna structure can generate dual resonances in the 2.4 GHz operating frequency band. (See reference...) Figure 27 In (b), the antenna structure has two resonant points when operating at 5 GHz, and this antenna structure can generate dual resonance in the 5 GHz operating frequency band.

[0205] Figure 28 yes Figure 26 The diagram shows the efficiency of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 28 (a) is a schematic diagram of the efficiency of the antenna structure in this embodiment when it operates at 2.4 GHz. The peak radiation efficiency is -3.5 dBi, and the operating bandwidth with a system efficiency greater than -4.5 dBi is 140 MHz. This indicates that the radiation performance of this antenna structure in the 2.4 GHz operating frequency band meets the design requirements and can effectively radiate energy. Figure 28 (b) is a schematic diagram of the efficiency of the antenna structure in this embodiment when it operates at 5 GHz. The peak radiation efficiency is -3.1 dBi, and the operating bandwidth with a system efficiency greater than -4.5 dBi is 870 MHz. This shows that the radiation performance of this antenna structure in the 5 GHz operating frequency band meets the design requirements and can effectively radiate energy.

[0206] In some embodiments, the filter assembly 5 may include a first filter 51 and a third filter 53, wherein the first filter 51 is a band-stop filter and the third filter 53 is a band-pass filter. The two poles of the first filter 51 are connected to the first side 111 and the second side 112 of the first slot 11, respectively. The first filter 51 is disposed between the first ground terminal 16 and the first feed point 181, and the connection position of the first filter 51 to the two sides of the first slot 11 is close to the first feed point 181. The second filter 52 is disposed on the signal line. The first filter 51 and the second filter 52 work together to enable the electrical signal from the first operating frequency band of the communication module to be fed only into the first slot 11 and not into the second slot 13, and to enable the electrical signal from the second operating frequency band of the communication module to be fed only into the second slot 13 and not into the first slot 11.

[0207] In some embodiments, the first filter 51 is a band-stop filter. The first filter 51 may include an inductor and a capacitor connected in parallel. For example, the inductance of the inductor in the first filter 51 may be 1nH, and the capacitance of the capacitor connected in parallel with the inductor in the first filter 51 may be 4.2pF. The third filter 53 is a band-pass filter. The third filter 53 may include an inductor and a capacitor connected in series. For example, the inductance of the inductor in the third filter 53 may be 6nH, and the capacitance of the capacitor in the third filter 53 may be 0.7pF.

[0208] Continue to refer to Figure 16 In this embodiment, the metal plate 1 is provided with a first gap 11 and a second gap 13, which are arranged in the same straight line direction. The first gap 11 and the second gap 13 share a second grounding terminal 15. The total length of the first gap 11 and the second gap 13 is 108.5 mm, and the width of both the first gap 11 and the second gap 13 is 1.2 mm. The first gap 11 is provided with a first inductor 31, a second inductor 32, and a first capacitor 21. The inductance values ​​of the first inductor 31 and the second inductor 32 are both 1.4n. H, the capacitance of the first capacitor 21 is 0.3pF. The second slot 13 is provided with a third inductor 33, a fourth inductor 34, and a second capacitor 22. The inductance values ​​of the third inductor 33 and the fourth inductor 34 are both 0.5nH. The capacitance value of the second capacitor 22 is 0.1pF. A first filter 51 is provided between the first inductor 31 and the first feed point 181. The first filter 51 is a band-stop filter and is close to the first feed point 181. A third filter 53 is provided on the signal line. The third filter 53 is a band-pass filter. Under the synergistic effect of the first filter 51 and the third filter 53, when the antenna structure operates at 2.4GHz, the electric field is concentrated in the region of the first slot 11. When the antenna structure operates at 5GHz, the electric field is concentrated in the region of the second slot 13.

[0209] Figure 29 yes Figure 16 The diagram shows the return loss of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 30 yes Figure 16 The antenna structure shown operates at 2.4 GHz and 5 GHz according to the Smith chart.

[0210] Figure 31 yes Figure 16 The diagram shows the efficiency of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 31 (a) is a schematic diagram of the efficiency of the antenna structure in this embodiment when it is operating at 2.4 GHz. The system efficiency is greater than -4.5 dBi and the operating bandwidth is 110 MHz, which indicates that the radiation performance of this antenna structure in the 2.4 GHz operating frequency band meets the design requirements and can effectively radiate energy. Figure 31 (b) is a schematic diagram of the efficiency of the antenna structure in this embodiment when it operates at 5 GHz. The system efficiency is greater than -4.5 dBi and the operating bandwidth is 830 MHz, which indicates that the radiation performance of this antenna structure in the 5 GHz operating frequency band meets the design requirements and can effectively radiate energy.

[0211] Figure 32 yes Figure 16 The diagram shows the radiation direction of the antenna structure operating at 2.4 GHz and 5 GHz. Figure 32(a) is a schematic diagram of the radiation direction of the antenna structure in this embodiment when it operates at a low frequency of 2.4 GHz. Figure 32 (b) is a schematic diagram of the radiation direction of the antenna structure in this embodiment when it operates at a high frequency of 2.4 GHz. Figure 32 (c) is a schematic diagram of the radiation direction of the antenna structure in this embodiment when it operates at a low frequency of 5 GHz. Figure 32 (d) in this embodiment is a schematic diagram of the radiation direction when the antenna structure operates at a high frequency of 5 GHz.

[0212] An electronic device 1000 provided in this application includes a grounding component and an antenna structure as described in any of the above embodiments. The first grounding terminal 16 and the second grounding terminal 15 of the antenna structure are both connected to the grounding component.

[0213] 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 antenna structure, characterized in that, include: The first capacitor, the first feed point, and the first slot opened on the metal plate; The two ends of the first gap are grounded to form a first grounding end and a second grounding end. The first gap has a first side and a second side that are disposed opposite to each other along the width direction of the first gap. The first side is provided with a first access point, and the second side is provided with a second access point opposite to the first access point. One end of the first capacitor is connected to the first access point, the other end of the first capacitor is connected to the positive terminal of the first feed point, the negative terminal of the first feed point is connected to the second access point, the distance between the first capacitor and the first grounding terminal is L1, the distance between the first capacitor and the second grounding terminal is L2, and L1 > L2. When the antenna structure operates at a first frequency in the first operating frequency band, the first capacitor is in a first state, and a first resonant circuit is formed between the first ground terminal and the second ground terminal. When the antenna structure operates at a second frequency in the first operating frequency band, the first capacitor is in a second state, and a second resonant circuit is formed between the first ground terminal and the first feed point. The resonant frequencies of the first resonant circuit and the second resonant circuit are different. The reactance of the first capacitor in the first state is higher than that in the second state, and the second frequency is higher than the first frequency.

2. The antenna structure according to claim 1, characterized in that, The wavelength of the first operating frequency band is λ1, and L2 ≤ 0.1λ1.

3. The antenna structure according to claim 1, characterized in that, The antenna structure further includes a first inductor, which is disposed between the first ground terminal and the first feed point, and the first inductor is connected to the first side and the second side respectively, so that the electric field between the first ground terminal and the first inductor is in the same direction as the electric field between the first inductor and the first feed point.

4. The antenna structure according to claim 3, characterized in that, The antenna structure further includes a second inductor, which is disposed between the first inductor and the first feed point, and the second inductor is connected to the first side and the second side respectively, so that the electric field between the first ground terminal and the first inductor, the electric field between the first inductor and the second inductor, and the electric field between the second inductor and the first feed point are in the same direction.

5. The antenna structure according to claim 3, characterized in that, The inductance of the first inductor is 0.5nH to 2nH.

6. The antenna structure according to any one of claims 1-5, characterized in that, The capacitance of the first capacitor is 0.1pF to 2pF.

7. The antenna structure according to any one of claims 1-5, characterized in that, The wavelength of the first operating frequency band is λ1, and the length of the first resonant circuit is 0.7λ1~1.5λ1; And / or, the length of the second resonant circuit is 0.7λ1~1.5λ1.

8. The antenna structure according to any one of claims 1-5, characterized in that, The antenna structure further includes a second capacitor and a second feed point. The metal plate is also provided with a second slot. One end of the second slot shares a second grounding terminal with the first slot. The other end of the second slot is grounded to form a third grounding terminal. The second slot has a third side and a fourth side that are arranged opposite to each other along the width direction of the second slot. The third side is provided with a third access point, and the fourth side is provided with a fourth access point opposite to the third access point. One end of the second capacitor is connected to the third access point, the other end of the second capacitor is connected to the positive terminal of the second feed point, the negative terminal of the second feed point is connected to the fourth access point, the distance between the second capacitor and the second grounding terminal is L3, the distance between the second capacitor and the third grounding terminal is L4, and L3 < L4. When the antenna structure operates at a third frequency within the second operating frequency band, the second capacitor is in a third state, and a third resonant circuit is formed between the second ground terminal and the third ground terminal; the second operating frequency band has a different frequency range than the first operating frequency band. When the antenna structure operates at the fourth frequency of the second operating frequency band, the second capacitor is in the fourth state, and a fourth resonant circuit is formed between the second feed point and the third ground terminal. The resonant frequencies of the third resonant circuit and the fourth resonant circuit are different. The reactance of the second capacitor in the third state is higher than that in the fourth state. The fourth frequency is higher than the third frequency.

9. The antenna structure according to claim 8, characterized in that, The wavelength of the second operating frequency band is λ2, and L3 ≤ 0.1λ2.

10. The antenna structure according to claim 8, characterized in that, The antenna structure further includes a third inductor, which is disposed between the second feed point and the third ground terminal, and the two ends of the third inductor are respectively connected to the third side and the fourth side, so that the electric field between the second ground terminal and the third inductor is in the same direction as the electric field between the third inductor and the third ground terminal.

11. The antenna structure according to claim 10, characterized in that, The antenna structure further includes a fourth inductor, which is disposed between the third inductor and the third ground terminal, and the two ends of the fourth inductor are respectively connected to the third side and the fourth side, so that the electric fields between the second ground terminal and the third inductor, the electric fields between the third inductor and the fourth inductor, and the electric fields between the fourth inductor and the third ground terminal are in the same direction.

12. The antenna structure according to claim 8, characterized in that, The antenna structure further includes a filter assembly connected to the first feed point and the second feed point. The filter assembly is used to feed electrical signals from the first operating frequency band of the communication module into the first gap and to feed electrical signals from the second operating frequency band of the communication module into the second gap.

13. An electronic device, characterized in that, It includes a grounding element and an antenna structure according to any one of claims 1-12, wherein the first grounding terminal and the second grounding terminal of the antenna structure are both connected to the grounding element.

Images