Antenna module and electronic equipment

Abstract

The invention provides an antenna module and electronic equipment, and the antenna module comprises an antenna unit which comprises a first antenna and a second antenna which are arranged at an interval; the isolation structure is arranged between the first antenna and the second antenna, the isolation structure comprises at least one isolation unit, and the isolation unit comprises a radiator structure with symmetrically arranged branch structures; wherein the radiator structure enables the isolation unit to present a negative refractive index characteristic under the working frequency of the antenna unit, so as to isolate a wireless signal of a target frequency band between the first antenna and the second antenna.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to an antenna module and an electronic device. Background Art

[0002] In modern wireless communication systems, multi-antenna technologies are widely applied to various electronic devices, such as smart phones, tablet computers, base stations, and Internet of Things devices. By increasing the number of antennas, a multi-antenna system can significantly improve data transmission rate, communication distance, and signal quality. However, when multiple antennas operate in close proximity, the electromagnetic fields between them interact with each other, resulting in signal coupling, which in turn affects the isolation of the antennas and the overall performance, reducing communication quality and data transmission rate.

[0003] Existing decoupling technologies reduce the mutual coupling effect by arranging a decoupling structure between the antennas. The decoupling structure is a metal sheet or a metal strip, which forms a shielding layer by connecting to the ground wire to reduce the electromagnetic coupling between the antennas. However, this decoupling structure can only be optimized for a single frequency band and cannot meet the decoupling requirements of different frequency bands simultaneously. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide an antenna module and an electronic device.

[0005] To solve the above technical problems, the embodiments of this application provide the following technical solutions:

[0006] In a first aspect of this application, an antenna module is provided, including:

[0007] An antenna unit, including a first antenna and a second antenna arranged at intervals;

[0008] An isolation structure, arranged between the first antenna and the second antenna, the isolation structure including at least one isolation unit, and the isolation unit including a radiator structure with symmetrically arranged stub structures;

[0009] Wherein, the radiator structure enables the isolation unit to exhibit a negative refractive index characteristic at the operating frequency of the antenna unit, so as to isolate the wireless signals in the target frequency band between the first antenna and the second antenna.

[0010] In some embodiments, the radiator structure includes a first radiator structure composed of a plurality of stub structures and a second radiator structure composed of a plurality of stub structures, and the first radiator structure and the second radiator structure are centrosymmetrically arranged or axially symmetrically arranged;

[0011] And / or,

[0012] A series equivalent capacitance and a parallel equivalent inductance can be formed between the multiple stub structures of the first radiation structure and the second radiation structure, so that the radiator structure has a negative refractive index characteristic at the operating frequency of the antenna element.

[0013] In some embodiments, the isolation structure includes a metamaterial array formed by a plurality of isolation units arranged at intervals. A series equivalent capacitance and a parallel equivalent inductance can be formed between two adjacent isolation units. When the antenna element is in an operating state, the metamaterial array exhibits a characteristic of negative equivalent permittivity and / or negative permeability within a target resonance frequency band, so as to isolate the wireless signals in the target frequency band between the first antenna and the second antenna;

[0014] And / or

[0015] The first radiator structure includes a first split ring resonator, and the second radiator structure includes a second split ring resonator. The first split ring resonator and the second split ring resonator share a first stub, and the first split ring resonator and the second split ring resonator are symmetrically arranged on both sides of the center line of the first stub along the extension direction.

[0016] In some embodiments, the first radiation structure further includes a third split ring resonator nested inside the first split ring resonator, and a first spiral stub nested inside the third split ring resonator. A second stub of the third split ring resonator is connected to the first stub in a direction perpendicular to the extension direction;

[0017] The openings of the first split ring resonator and the third split ring resonator are arranged in a staggered manner;

[0018] The second radiation structure further includes a fourth split ring resonator nested inside the second split ring resonator, and a second spiral stub nested inside the fourth split ring resonator. A third stub of the fourth split ring resonator is connected to the first stub in a direction perpendicular to the extension direction;

[0019] The openings of the second split ring resonator and the fourth split ring resonator are arranged in a staggered manner;

[0020] The third split ring resonator and the fourth split ring resonator are centrosymmetrically arranged, and the first spiral stub and the second spiral stub are centrosymmetrically arranged.

[0021] In some embodiments, the third split ring resonator and the fourth split ring resonator are symmetrically arranged on both sides of the center line of the first stub along the extension direction, and the first spiral stub and the second spiral stub are symmetrically arranged on both sides of the center line of the first stub along the extension direction;

[0022] And / or,

[0023] Both the first split-ring resonator and the second split-ring resonator each include two fourth branches that are arranged perpendicular to the extending direction of the first branch and are connected to opposite ends of the first branch in the extending direction, and a fifth branch connected to the two fourth branches, and a first notch is provided in the fifth branch;

[0024] The third split-ring resonator includes a sixth branch spaced from the second branch, and two eighth branches that are arranged perpendicular to the extending direction of the sixth branch and are connected to opposite ends of the sixth branch in the extending direction, and a second notch is provided between the second branch and one of the eighth branches;

[0025] The fourth split-ring resonator includes a seventh branch spaced from the third branch, and two eighth branches that are arranged perpendicular to the extending direction of the seventh branch and are connected to opposite ends of the seventh branch in the extending direction, and a second notch is provided between the third branch and one of the eighth branches;

[0026] The fixed ends of the first helical branch and the second helical branch are respectively connected to the second branch and the third branch in a direction perpendicular to the extending direction, and the free ends are respectively arranged within the annular structure formed by the helical branches.

[0027] In some embodiments, the first radiation structure further includes a third helical branch nested within the first split-ring resonator, and a fourth helical branch nested within the annular structure formed by the third helical branch;

[0028] The second radiation structure further includes a fifth helical branch nested within the second split-ring resonator, and a sixth helical branch nested within the annular structure formed by the fifth helical branch;

[0029] The third helical branch and the fifth helical branch are symmetrically arranged on both sides of the center line of the first branch in the extending direction;

[0030] The fourth helical branch and the sixth helical branch are symmetrically arranged on both sides of the center line of the first branch in the extending direction;

[0031] And / or,

[0032] A first spacing is provided between the third helical branch and the fourth helical branch, a second spacing is provided between the third helical branch and the first split-ring resonator, and the first spacing and the second spacing are the same or different.

[0033] In some embodiments, the third helical stub and the fifth helical stub are centrosymmetrically arranged, and the fourth helical stub and the sixth helical stub are centrosymmetrically arranged;

[0034] And / or,

[0035] Both the fourth helical stub and the sixth helical stub include a first sub-stub, a second sub-stub, a third sub-stub, and a fourth sub-stub connected in sequence. The first sub-stub is perpendicular to the first stub, and at least one fifth sub-stub perpendicular to the third sub-stub is arranged between the second sub-stub and the fourth sub-stub.

[0036] In some embodiments, the target frequency band includes the 2.4 GHz frequency band and / or the 5G - 7 GHz frequency band;

[0037] And / or,

[0038] The total length of the stubs of the first open resonator and the second open resonator is negatively correlated with the resonant frequency of the isolation unit;

[0039] And / or,

[0040] The structural parameters of the second open resonator, the third open resonator, the first helical stub, and the second helical stub are related to the resonant frequency of the isolation unit.

[0041] A second aspect of the present application provides an electronic device, including a device body having an accommodation space and an antenna module disposed in the accommodation space. The antenna module includes:

[0042] An antenna unit, including a first antenna and a second antenna arranged at intervals;

[0043] An isolation structure disposed between the first antenna and the second antenna. The isolation structure includes at least one isolation unit, and the isolation unit includes a radiator structure with symmetrically arranged stub structures;

[0044] Wherein, the radiator structure enables the isolation unit to exhibit a negative refractive index characteristic at the operating frequency of the antenna unit, so as to isolate the wireless signals in the target frequency band between the first antenna and the second antenna;

[0045] Wherein, the device body includes a display part composed of a housing and a display screen and / or a main body part composed of a housing and an input device. The antenna module is disposed in the accommodation space formed by the display part or the main body part. Wherein, at least part of the housing forming the accommodation space is made of an insulating material or the accommodation space has an opening.

[0046] In some embodiments, the device body includes a main body part and a display part that are rotatably connected, and the antenna module is disposed in the accommodation space formed by the main body part;

[0047] The isolation structure includes a metamaterial array formed by a plurality of isolation units. An equivalent capacitance in series and an equivalent inductance in parallel can be formed between two adjacent isolation units. When the antenna unit is in a working state, the metamaterial array exhibits characteristics of a negative equivalent permittivity and / or a negative permeability within a target resonance frequency band, so as to isolate the wireless signals in the target frequency band between the first antenna and the second antenna;

[0048] And / or

[0049] The radiator structure includes a first radiator structure formed by a plurality of stub structures and a second radiator structure formed by a plurality of stub structures. The first radiator structure and the second radiator structure are arranged in central symmetry or axial symmetry. Description of the Drawings

[0050] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present application will become readily understood. In the drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0051] Figure 1 Schematically shows a structural diagram of a first perspective of an embodiment of the antenna module of the present application;

[0052] Figure 2 Schematically shows a structural diagram of a second perspective of an embodiment of the antenna module of the present application;

[0053] Figure 3 Schematically shows a structural diagram of another embodiment of the antenna module of the present application;

[0054] Figure 4 Schematically shows a structural diagram of another embodiment of the antenna module of the present application;

[0055] Figure 5 Schematically shows a structural diagram of another embodiment of the antenna module of the present application;

[0056] Figure 6 Schematically shows a structural diagram of the electronic device of the present application;

[0057] Figure 7 is Figure 6 a partial enlarged view at C in;

[0058] Figure 8 The simulation result of the equivalent dielectric constant of the isolation unit under the first parameter;

[0059] Figure 9 The influence of parameter a on the equivalent dielectric constant of the isolation unit (the first parameter);

[0060] Figure 10 The comparison of antenna isolation (the first parameter);

[0061] Figure 11 The comparison of antenna isolation (the second parameter).

[0062] Explanation of the reference numerals in the attached drawings:

[0063] 100, antenna element; 1001, first antenna; 1002, second antenna; 200, isolation structure; A, isolation unit; 1, first radiator structure; 11, first split ring resonator; 111, first branch; 112, fourth branch; 113, fifth branch; 114, first notch; 12, third split ring resonator; 121, second branch; 122, sixth branch; 123, eighth branch; 124, second notch; 13, first spiral branch; 14, third spiral branch; 141, sixth sub-branch; 142, seventh sub-branch; 143, eighth sub-branch; 144, ninth sub-branch; 15, fourth spiral branch; 151, first sub-branch; 152, second sub-branch; 153, third sub-branch; 154, fourth sub-branch; 155, fifth sub-branch; 2, second radiator structure; 21, second split ring resonator; 22, fourth split ring resonator; 221, third branch; 222, seventh branch; 23, second spiral branch; 24, fifth spiral branch; 25, sixth spiral branch; B, dielectric substrate; 300, device body; 3001, display part; 3002, host part; 3003, accommodation space. Detailed implementation manners

[0064] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0065] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which this application belongs.

[0066] Example 1

[0067] As Figure 1 、Figure 2 and Figure 7 As shown in and

[0068] , a first aspect of the present application provides an antenna module, including:

[0068] An antenna unit 100, including a first antenna 1001 and a second antenna 1002 arranged at intervals;

[0069] An isolation structure 200, arranged between the first antenna 1001 and the second antenna 1002, the isolation structure 200 includes at least one isolation unit A, and the isolation unit A includes a radiator structure with symmetrically arranged branches;

[0070] Wherein, the radiator structure enables the isolation unit A to exhibit a negative refractive index characteristic at the operating frequency of the antenna unit 100, so as to isolate the wireless signals in the target frequency band between the first antenna 1001 and the second antenna 1002.

[0071] Specifically, the antenna unit 100 adopts multi-antenna technology and is responsible for signal transmission and reception. The first antenna 1001 and the second antenna 1002 of the antenna unit 100 jointly improve the communication performance through collaborative work. The operating frequency bands of the first antenna 1001 and the second antenna 200 can be low frequencies, such as 2.4 GHz, and the operating frequency bands of the first antenna 1001 and the second antenna 1002 can be medium and high frequencies, such as 5 - 7 GHz, or vice versa, to achieve multi-band / multi-mode operation of the antenna unit 100. The interval distance between the first antenna 1001 and the second antenna 1002 is designed according to the operating frequency band and coupling strength requirements. For example, the two can be spaced 5 mm - 20 mm apart. The first antenna 1001 and the second antenna 1002 can be dipole antennas or the main and sub-antennas of WiFi, such as Inverted-F Antenna (IFA), etc.

[0072] The isolation structure 200 is used to reduce the electromagnetic coupling between the first antenna 1001 and the second antenna 1002, thereby improving the overall performance of the antenna unit 100. The isolation structure 200 has a spacing from both the first antenna 1001 and the second antenna 1002, and this spacing can be specifically designed according to the operating frequency band and wavelength of the antenna, as well as the resonant frequency of the isolation structure (its own structural design), etc.; among them, for medium and high frequency antennas (such as 5 - 7 GHz), the wavelength is shorter and the spacing can be relatively smaller; for low frequency antennas (such as 2.4 GHz), the wavelength is longer and the spacing can be relatively larger. The spacing between the isolation structure 200 and the first antenna 1001 and the second antenna 1002 can be equal. For example, both can be 0.25 mm or 0.26 mm, etc.; or, the spacing between the isolation structure 200 and the first antenna 1001 and the second antenna 1002 can be unequal. For example, the spacing between the isolation structure 200 and the first antenna 1001 can be 0.25 mm, and the spacing between the isolation structure 200 and the second antenna 1002 can be 0.26 mm, etc.

[0073] The isolation unit A of the isolation structure 200 can be arranged on the dielectric substrate B of the antenna module together with the antenna unit 100. The dielectric substrate B can be selected as an FR4 dielectric substrate B (epoxy glass cloth copper clad laminate) or a flexible substrate, etc. Among them, the FR4 dielectric substrate B not only has a low cost but also is suitable for mass production. When the dielectric substrate B is selected as the FR4 dielectric substrate B, its thickness h can be h = 0.4 mm to adapt to the compact design of electronic devices such as mobile phones and laptop computers. The radiator structure can be arranged on the dielectric substrate B through a printing process or an embedding process. The number of isolation units A can be one or more arranged on one surface of the dielectric member.

[0074] The radiator structure can include two single and symmetric branches to simplify the structure and reduce the production cost. An equivalent capacitance in series and an equivalent inductance in parallel can be formed between the symmetrically arranged branch structures, and at the corresponding resonant frequency, they exhibit the characteristics of negative magnetic permeability and / or negative permittivity, thereby having a negative refractive index and forming a metamaterial isolation unit A. This negative refractive index characteristic enables the isolation unit A to effectively isolate the electromagnetic coupling between antennas within the target frequency band without relying on a traditional grounding design. The operating frequency of the antenna unit 100 is also the frequency at which the negative refractive index characteristic appears when the antenna module is operating. That is, when the antenna module is operating, within the operating frequency band (such as 2.4 GHz, 5 GHz to 7 GHz), the isolation unit A will exhibit the negative refractive index characteristic. This characteristic helps to reduce the electromagnetic coupling between antennas, improve the communication quality and stability. By achieving the negative refractive index characteristic, the isolation unit A can effectively reduce the mutual interference between antennas and ensure that each antenna operates efficiently within its designated operating frequency band.

[0075] A signal with a target frequency band being a specific frequency band. The radiator can completely isolate the signal between the two antennas to prevent any unnecessary interference, or can only isolate a part of the signal, that is, allow signals of certain frequency bands to pass through while isolating signals of other frequency bands to adapt to different application scenarios.

[0076] In the antenna module of Embodiment 1 of this application, by arranging an isolation structure 200 between the first antenna 1001 and the second antenna 1002 of the antenna unit 100, since equivalent capacitors in series and equivalent inductors in parallel can be formed between the symmetrically arranged branch structures of the isolation unit A of the isolation structure 200, and at the corresponding resonance frequency, it exhibits the characteristics of negative magnetic permeability and / or negative permittivity, thus having a negative refractive index and forming a metamaterial isolation unit A. This negative refractive index characteristic helps to isolate wireless signals in the target frequency band, reduce the mutual interference between the first antenna 1001 and the second antenna 1002, reduce or eliminate signal distortion and interference caused by antenna coupling, improve the clarity of signals and the communication reliability of the antenna unit 100 in different communication frequency bands, improve the overall communication quality, and there is no need to connect the isolation structure 200 to the antenna ground, reducing the complexity of the entire system and facilitating integration into existing electronic devices.

[0077] As Figure 1 , Figures 3 to 5 shown, in some embodiments, the radiator structure includes a first radiator structure 1 composed of a plurality of branch structures and a second radiator structure 2 composed of a plurality of branch structures, and the first radiator structure 1 and the second radiator structure are centrosymmetrically arranged or axially symmetrically arranged;

[0078] And / or,

[0079] Between the multiple branch structures of the first radiator structure and the second radiator structure, equivalent capacitors in series and equivalent inductors in parallel can be formed so that the radiator structure has a negative refractive index characteristic at the operating frequency of the antenna unit 100.

[0080] Specifically, the first radiator structure 1 and the second radiator structure 2 can rotate 180° around a common center point and completely coincide. For example, the two radiator structures can be resonant rings with opposite or relative opening directions (such as split-ring resonators) to adapt to application scenarios where the electromagnetic field is evenly distributed in all directions; or, the first radiator structure 1 and the second radiator are symmetrically distributed along a common axis. For example, the two radiator structures can be spiral branches with opposite helix directions (such as spiral arms) to be applicable to application scenarios where the electromagnetic field needs to be enhanced along a specific direction. The number and layout of the branches can be flexibly adjusted according to actual needs to adapt to different application scenarios and frequency requirements.

[0081] By forming a series equivalent capacitance and a parallel equivalent inductance between multiple stub structures of the first radiation structure and the second radiation structure, the overall radiator structure has a certain resonant frequency. After being excited to resonate, it can exhibit negative magnetic permeability and / or negative dielectric constant, thus having the characteristic of negative refractive index, and thus can block / cancel the propagation of surface / space coupled waves. The interaction between multiple stubs can better achieve the characteristics of negative magnetic permeability and / or negative dielectric constant, thereby significantly enhancing the effect of negative refractive index. Moreover, the multi-stub structure can form resonances at multiple frequencies, which helps to achieve efficient signal isolation and transmission in different frequency bands and improve the overall communication performance.

[0082] As Figures 1 to 7 shown, in some embodiments, the isolation structure 200 includes a metamaterial array formed by a plurality of spaced-apart isolation units A. An equivalent capacitance in series and an equivalent inductance in parallel can be formed between two adjacent isolation units A. When the antenna unit 100 is in the working state, the metamaterial array exhibits the characteristics of negative equivalent dielectric constant and / or negative magnetic permeability within the target resonant frequency band to isolate the wireless signal in the target frequency band between the first antenna 1001 and the second antenna 1002;

[0083] And / or,

[0084] The first radiator structure 1 includes a first split ring resonator 11, and the second radiator structure 2 includes a second split ring resonator 21. The first split ring resonator 11 and the second split ring resonator 21 share a first stub 111. The first split ring resonator 11 and the second split ring resonator 21 are symmetrically arranged on both sides of the center line of the first stub 111 along the extension direction.

[0085] Specifically, the number of isolation units A can be two, three, four, five, six or even more. The specific number of isolation units A can be specifically selected according to the coupling strength between the first antenna 1001 and the second antenna 1002. The multiple isolation units A can be arranged linearly and equidistantly. The distance between adjacent isolation units A can be 0.4 - 0.5 mm, such as 0.5 mm or 0.45 mm. By increasing the number of isolation units A, higher isolation can be achieved within the target frequency band, reducing the electromagnetic coupling between antennas and significantly reducing the mutual interference between antennas.

[0086] The target resonant frequency band has a corresponding relationship with the target radiation signal (i.e., the communication signal in the actual operating frequency band of the antenna element 100), such as being the same frequency band or having a mapping relationship. For example, when the target resonant frequency band is exactly the same as the target frequency band, the metamaterial array can most effectively suppress electromagnetic coupling within this frequency band; or, in some cases, the target resonant frequency band may deviate slightly from the target frequency band, and through specific designs (such as adjusting the length and width of the stub, etc.), it can achieve effective signal isolation within the target frequency band.

[0087] The first split-ring resonator 11 and the second split-ring resonator 21 share a part of the physical structure, reducing material usage and improving manufacturing efficiency. The two split-ring resonators are symmetrically arranged on both sides of the center line of the first stub 111, ensuring similar electromagnetic response characteristics in different directions. Each split-ring resonator can be rectangular, circular or other shapes, depending on the required frequency response and application scenarios. By changing the size and shape of the split-ring resonator, its resonant frequency can be adjusted to match the target frequency band. For example,

[0088] Optimal signal isolation effect is achieved within the frequency band of 2.4 GHz or 5 GHz to 7 GHz.

[0089] Such as Figure 1 and Figure 3 As shown in

[0090] In some embodiments, the first radiation structure further includes a third split-ring resonator 12 nested within the first split-ring resonator 11, and a first spiral stub 13 nested within the third split-ring resonator 12. The second stub 121 of the third split-ring resonator 12 is connected to the first stub 111 in a direction perpendicular to the extension direction;

[0091] The openings of the first split-ring resonator 11 and the openings of the third split-ring resonator 12 are arranged in a staggered manner;

[0092] The second radiation structure further includes a fourth split-ring resonator 22 nested within the second split-ring resonator 21, and a second spiral stub 23 nested within the fourth split-ring resonator 22. The third stub 221 of the fourth split-ring resonator 22 is connected to the first stub 111 in a direction perpendicular to the extension direction;

[0093] The third split-ring resonator 12 and the fourth split-ring resonator 22 are centrosymmetrically arranged, and the first spiral stub 13 and the second spiral stub 23 are centrosymmetrically arranged.

[0094] Specifically, the second branch 121 and the first branch 111 can be welded or integrally formed, or obtained by etching a metal patch; the third branch 221 and the first branch 111 can be welded or integrally formed. The length of the second branch 121 in the extending direction is less than the length of the first branch 111 in the extending direction. And the length of the third branch 221 in the extending direction is less than the length of the first branch 111 in the extending direction.

[0095] The third open resonator 12 is nested inside the first open resonator 11 to further define the range of the resonant frequency band, further enhance the resonant effect, and improve the signal isolation ability. The first spiral branch 13 is nested inside the third open resonator 12, which can provide a stronger negative refractive index characteristic within a specific frequency band, thereby enhancing the isolation effect. The second branch 121 of the third open resonator 12 is connected to the first branch 111 in a direction perpendicular to the extending direction, which not only enhances the structural stability but also simplifies the manufacturing process. The openings of the first open resonator 11 and the third open resonator 12 are staggered in position, which helps to reduce the direct propagation path of electromagnetic waves, thereby further enhancing the isolation effect. The fourth open resonator 22 is nested inside the second open resonator 21 to further enhance the resonant effect and improve the signal isolation ability. The second spiral branch 23 is nested inside the fourth open resonator 22, which can provide a stronger negative refractive index characteristic within a specific frequency band, thereby enhancing the isolation effect. The third branch 221 of the fourth open resonator 22 is connected to the first branch 111 in a direction perpendicular to the extending direction, which not only enhances the structural stability but also simplifies the manufacturing process. The openings of the second open resonator 21 and the fourth open resonator 22 are staggered in position, which helps to reduce the direct propagation path of electromagnetic waves, thereby further enhancing the isolation effect.

[0096] By nesting the open resonators and spiral branches, a higher isolation degree can be achieved within the target frequency band, the electromagnetic coupling between antennas can be reduced, and the mutual interference between antennas can be significantly reduced. The interaction between multiple resonators and spiral branches can better achieve the characteristics of negative magnetic permeability and / or negative permittivity, thereby significantly enhancing the effect of negative refractive index.

[0097] As Figure 1 and Figure 3 shown, in some embodiments, the third open resonator 12 and the fourth open resonator 22 are symmetrically arranged on both sides of the center line of the first branch 111 along the extending direction, and the first spiral branch 13 and the second spiral branch 23 are symmetrically arranged on both sides of the center line of the first branch 111 along the extending direction;

[0098] And / or,

[0099] The first split ring resonator 11 and the second split ring resonator 21 both include two fourth branches 112 that are arranged perpendicular to the extending direction of the first branch 111 and are connected to opposite ends of the first branch 111 in the extending direction, and a fifth branch 113 that is connected to the two fourth branches 112. A first notch 114 is provided in the fifth branch 113;

[0100] The third split ring resonator 12 includes a sixth branch 122 that is spaced from the second branch 121, and two eighth branches 123 that are arranged perpendicular to the extending direction of the sixth branch 122 and are connected to opposite ends of the sixth branch 122 in the extending direction. A second notch 124 is provided between the third branch 221 and one of the eighth branches 123;

[0101] The fourth split ring resonator 22 includes a seventh branch 222 that is spaced from the third branch 221, and two eighth branches 123 that are arranged perpendicular to the extending direction of the seventh branch 222 and are connected to opposite ends of the seventh branch 222 in the extending direction. A second notch 124 is provided between the third branch 221 and one of the eighth branches 123;

[0102] The fixed ends of the first spiral branch 13 and the second spiral branch 23 are respectively connected to the second branch 121 and the third branch 221 in a direction perpendicular to the extending direction, and the free ends are respectively arranged within the annular structure formed by the spiral branches.

[0103] Specifically, the first direction is set as the extending direction of the first branch 111, the second direction is set as the extending direction of the fourth branch 112, and the third direction is perpendicular to both the first direction and the second direction. The fifth branch 113 is perpendicular to the fourth branch 112.

[0104] Each branch can be strip-shaped. The two fourth branches 112 of the first split ring resonator 11 are parallel, the two fourth branches 112 of the second split ring resonator 21 are parallel, and are collinear with the fourth branch 112 of the first split ring resonator 11 (coincide along the second direction). The fifth branches 113 of the first / second split ring resonators 21 both extend along the first direction and form a 90° perpendicular connection with their corresponding fourth branches 112. The length and width of each branch can be specifically designed according to the spacing between the first antenna 1001 and the second antenna 1002 to optimize the antenna performance. The spacing between the fifth branch 113 and the sixth branch 122 can be appropriately adjusted based on 0.3 mm. When increasing the spacing between the two, due to the decrease in the capacitance effect, the resonant frequency may shift to a higher frequency; when decreasing the spacing between the two, due to the increase in the capacitance effect, the resonant frequency may shift to a lower frequency. Specific designs can be made according to actual requirements.

[0105] The dimensions of the first parameter of isolation unit A can be: the sum of the dimensions of the first stub 111, the fourth stub 112 of the first split-ring resonator 11 connected to the first stub 111, and the fourth stub 112 of the second split-ring resonator 21 connected to the first stub 111 along the second direction, that is, the dimension L of the radiator structure along the second direction is 9.6 mm. The dimension of the fifth stub 113 along the first direction, that is, the dimension W of the radiator structure along the first direction is 5.4 mm. The dimension a of the first notch 114 along the first direction is 1.2 mm; the dimension b from the outer wall of the fifth stub 113 along the first direction to the first notch 114 is 2.1 mm, the dimension g of the fourth stub 112 along the first direction is 0.3 mm, the distance d between the fifth stub 113 and the sixth stub 122 along the second direction is 0.3 mm, and the dimension e of the eighth stub 123 along the second direction is 3.8 mm. The distance y between the free end and the fixed end of the first spiral stub 13 along the second direction is 0.47 mm; the dimension m of the free end of the first spiral stub 13 along the first direction is 1.6 mm, and the dimension f of the end adjacent to the free end of the first spiral stub 13 along the second direction is 2.4 mm.

[0106] The dimensional parameters of the second split-ring resonator 21 are the same as those of the first split-ring resonator 11. The dimensional parameters of the fourth split-ring resonator 22 are the same as those of the third split-ring resonator 12. The dimensional parameters of the second spiral stub 23 are the same as those of the first spiral stub 13, which will not be elaborated here.

[0107] The simulation results of the equivalent dielectric constant using CST simulation software under the first parameter are as Figure 8 shown. This isolation unit A exhibits a negative equivalent dielectric constant within the operating frequency bands of low frequency 2.4 GHz and medium-high frequency 5 - 7 GHz. According to the generalized metamaterial theory, it can be determined to have metamaterial characteristics.

[0108] As Figure 9 shown, the influence of parameter a on the equivalent dielectric constant of isolation unit A under the first parameter. As parameter a decreases from 4.6 mm to 0.6 mm, the electrical length of the first split-ring resonator 11 increases. The low-frequency band of the simulated metamaterial changes little, while the high-frequency band changes significantly and gradually shifts towards the low-frequency direction.

[0109] As Figure 10 shown, the comparison chart of the antenna isolation under the first parameter. One curve represents the traditional antenna pair, and the other curve represents the antenna pair scheme with the addition of the metamaterial structure unit. The antenna pair scheme with the addition of isolation unit A has been significantly improved within the operating frequency bands of low frequency 2.4 GHz and medium-high frequency 5 - 7 GHz. It can be seen that this case can obtain a better isolation effect.

[0110] By nesting multiple split-ring resonators and spiral stubs, higher isolation can be achieved within the target frequency band, reducing electromagnetic coupling between antennas and significantly reducing mutual interference between antennas. The symmetric design ensures uniform electromagnetic response characteristics in different directions. Through reasonable design (such as notches, stub sizes, etc.), the resonant frequency and electrical performance can be adjusted to match the target frequency band to meet the requirements of different application scenarios.

[0111] As Figure 4 shown, in some embodiments, the first radiation structure further includes a third spiral stub 14 nested within the first split-ring resonator 11, and a fourth spiral stub 15 nested within the annular structure formed by the third spiral stub 14;

[0112] The second radiation structure further includes a fifth spiral stub 24 nested within the second split-ring resonator 21, and a sixth spiral stub 25 nested within the annular structure formed by the fifth spiral stub 24;

[0113] The third spiral stub 14 and the fifth spiral stub 24 are symmetrically arranged on both sides of the center line of the first stub 111 along the extension direction;

[0114] The fourth spiral stub 15 and the sixth spiral stub 25 are symmetrically arranged on both sides of the center line of the first stub 111 along the extension direction;

[0115] And / or,

[0116] There is a first spacing between the third spiral stub 14 and the fourth spiral stub 15, and a second spacing between the third spiral stub 14 and the first split-ring resonator 11, and the first spacing and the second spacing are the same or different.

[0117] Specifically, the fixed end of the third spiral stub 14 is connected to the first stub 111, and the free end of the third spiral stub 14 can be located within the annular structure formed by the third spiral stub 14 itself. The fixed end of the fourth spiral stub 15 is connected to the first stub 111, and the free end of the fourth spiral stub 15 can be located within the annular structure formed by the fourth spiral stub 15 itself. The fixed end of the fifth spiral stub 24 is connected to the first stub 111, and the free end of the fifth spiral stub 24 can be located within the annular structure formed by the fifth spiral stub 24 itself. The fixed end of the sixth spiral stub 25 is connected to the first stub 111, and the free end of the sixth spiral stub 25 can be located within the annular structure formed by the sixth spiral stub 25 itself. By adjusting the first spacing and the second spacing, the resonant frequency and impedance matching of the antenna unit 100 can be finely controlled, thereby achieving the best working performance.

[0118] By nesting multiple spiral stubs and adopting a symmetric design, higher isolation can be achieved within the target frequency band, electromagnetic coupling between antennas can be reduced, and mutual interference between antennas can be significantly lowered. Rational size and shape design (such as the spacing and size of the spiral stubs, etc.) helps to adjust the resonant frequency and electrical performance to match the target frequency band and meet the requirements of different application scenarios.

[0119] As Figure 5 shown, in some embodiments, the third spiral stub 14 and the fifth spiral stub 24 are centrosymmetrically arranged, and the fourth spiral stub 15 and the sixth spiral stub 25 are centrosymmetrically arranged;

[0120] And / or,

[0121] Both the fourth spiral stub 15 and the sixth spiral stub 25 include a first sub-stub 151, a second sub-stub 152, a third sub-stub 153, and a fourth sub-stub 154 connected in sequence. The first sub-stub 151 is perpendicular to the first stub 111, and at least one fifth sub-stub 155 perpendicular to the third sub-stub 153 is provided between the second sub-stub 152 and the fourth sub-stub 154.

[0122] Specifically, each sub-stub can be strip-shaped. The second sub-stub 152, the fourth sub-stub 154, the fifth sub-stub 155, the seventh sub-stub 142, the second stub 121, and the fifth stub 113 are parallel to each other, and the first sub-stub 151, the third sub-stub 153, the sixth sub-stub 141, the eighth sub-stub 143, and the fourth stub 112 are parallel to each other. The length and width of each stub can be specifically designed according to the spacing between the first antenna 1001 and the second antenna 1002 to optimize the antenna performance. The spacing between the fifth stub 113 and the seventh sub-stub 142 can be appropriately adjusted based on 0.2 mm. When the spacing between the two is increased, due to the decrease in the capacitance effect, the resonant frequency may shift to a higher frequency; when the spacing between the two is decreased, due to the increase in the capacitance effect, the resonant frequency may shift to a lower frequency. Specific design can be carried out according to actual requirements.

[0123] Both the third spiral stub 14 and the fifth spiral stub 24 include a sixth sub-stub 141, a seventh sub-stub 142, an eighth sub-stub 143, and a ninth sub-stub 144 connected in sequence. The sixth sub-stub 141 is perpendicular to the first stub 111. The number of the fifth sub-stubs 155 can be one or multiple, such as two, three, four, or even five, etc. When there are multiple fifth sub-stubs 155, the multiple fifth sub-stubs 155 are arranged at intervals on the third sub-stub 153 along the second direction. As Figure 4 and Figure 5As shown, under the second parameter: L = 10 mm, W = 5.4 mm, a = 0.5 mm, b = 2.45 mm, g = 0.3 mm, the distance d between the fifth branch 155 and the seventh sub-branch 142 is 0.2 mm, the dimension e of the eighth sub-branch 143 along the second direction is 3.8 mm, the dimension m of the ninth sub-branch 144 along the first direction is 3 mm, the dimension f of the third sub-branch 153 along the second direction is 2.5 mm, the dimension n of the fourth sub-branch 154 along the first direction is 1.7 mm, and the distance z between the fourth sub-branch 154 and the fifth sub-branch 155 along the second direction is 0.5 mm.

[0124] Place the isolation structure 200 between the first antenna 1001 and the second antenna 1002 of the electronic device. The isolation structure 200 includes 4 isolation units A. The distance between the isolation units A is 0.45 mm, they are independently suspended, and the distance from the antenna ground is 0.25 mm. As Figure 11 shown, it is a comparison chart of antenna isolation. One curve represents the traditional antenna pair, and the other curve represents the antenna pair solution with the isolation structure 200 added. The isolation degree of the solution with the isolation structure 200 added has been significantly improved within the operating frequency bands of 2.4 GHz at low frequency and 5 - 6 GHz at medium and high frequencies.

[0125] The interaction between multiple spiral branches and their sub-branches can better achieve the characteristics of negative magnetic permeability and / or negative dielectric constant, thereby significantly enhancing the effect of negative refractive index. By introducing at least one fifth sub-branch 155 into the fourth spiral branch 15 and the sixth spiral branch 25, the electromagnetic performance and structural characteristics of the antenna can be significantly improved. It can not only achieve more precise frequency tuning and stronger negative refractive index characteristics, but also optimize the propagation path of electromagnetic waves and enhance the mechanical strength of the structure.

[0126] In some embodiments, wherein, the target frequency band includes the 2.4 GHz frequency band and / or the 5G - 7 GHz frequency band;

[0127] And / or,

[0128] As Figures 1 to 5 shown, the total branch length of the first split ring resonator 11 and the second split ring resonator 21 has a negative correlation with the resonant frequency of the isolation unit A;

[0129] And / or,

[0130] The structural parameters of the second split ring resonator 21, the third split ring resonator 12, the first spiral branch 13, and the second spiral branch 23 are related to the resonant frequency of the isolation unit A.

[0131] Specifically, through reasonable design (such as adjusting the stub length, opening size, etc.), the antenna can support multiple frequency bands simultaneously, making it suitable for application scenarios that require multi-band communication, such as Wi-Fi, 5G communication, etc. According to the requirements of different frequency bands, the size parameters of each part can be flexibly adjusted to meet the resonance frequency requirements of specific frequency bands.

[0132] The shorter the total stub length of the first open resonator ring 11 and the second open resonator ring 21, the higher its resonance frequency; conversely, the longer the total stub length, the lower the resonance frequency. This negative correlation enables precise control of the resonance frequency by adjusting the stub length. For the 2.4 GHz frequency band and the 5G - 7 GHz frequency band, the resonance frequency can be ensured to fall within the required frequency band range by adjusting the stub length, thereby improving the efficiency and performance of the antenna.

[0133] By adjusting the structural parameters of the second open resonator ring 21, the third open resonator ring 12, the first spiral stub 13, and the second spiral stub 23 (such as stub length, opening size, number of turns of the spiral, etc.), the resonance frequency can be precisely controlled to match the target frequency band. A reasonable design of the structural parameters helps reduce electromagnetic interference between adjacent antenna units 100 and improve the overall isolation of the system.

[0134] Embodiment 2

[0135] As Figures 1 to 7 shown, Embodiment 2 of the present application provides an electronic device, including a device body 300 having an accommodation space 3003 and an antenna module disposed in the accommodation space 3003. The antenna module includes:

[0136] An antenna unit 100, including a first antenna 1001 and a second antenna 1002 disposed at intervals;

[0137] An isolation structure 200, disposed between the first antenna 1001 and the second antenna 1002. The isolation structure 200 includes at least one isolation unit A, and the isolation unit A includes a radiator structure with symmetrically arranged stub structures;

[0138] Wherein, the radiator structure enables the isolation unit A to exhibit a negative refractive index characteristic at the operating frequency of the antenna unit 100 to isolate the wireless signals in the target frequency band between the first antenna 1001 and the second antenna 1002;

[0139] Among them, the device body 300 includes a display part 3001 composed of a housing and a display screen and / or a main body part 3002 composed of a housing and an input device. The antenna module is disposed in a receiving space 3003 formed by the display part 3001 or the main body part 3002. At least part of the housing forming the receiving space 3003 is made of an insulating material or the receiving space 3003 has an opening.

[0140] Specifically, the electronic device may be a smart phone, a laptop computer, a smart watch, or the like.

[0141] The display part 3001 may include a housing and a display screen. The display part 3001 is used for displaying a user interface, application content, and other visual information. The main body part 3002 may include a housing and an input device (such as a keyboard, a touchpad, etc.). The main body part 3002 is used for processing user input and system operations. The insulating material used for at least part of the housing forming the receiving space 3003 may be selected from plastics, glass, etc. to avoid shielding of wireless signals. Alternatively, when the outer shell is made of metal, the outer shell is configured with an opening so that wireless signals can pass through smoothly. The dielectric substrate B of the antenna module may be installed in the receiving space 3003 by embedding or mounting.

[0142] The electronic device according to Embodiment 2 of the present application includes the antenna module of Embodiment 1. By providing an isolation structure 200 between the first antenna 1001 and the second antenna 1002 of the antenna unit 100, since equivalent capacitances in series and equivalent inductances in parallel can be formed between the symmetrically arranged branch structures of the isolation unit A of the isolation structure 200, and at corresponding resonance frequencies, characteristics of negative magnetic permeability and / or negative permittivity are presented, thereby having a negative refractive index and forming a metamaterial isolation unit A. This negative refractive index characteristic helps to isolate wireless signals in a target frequency band, reduce the mutual interference between the first antenna 1001 and the second antenna 1002, reduce or eliminate signal distortion and interference caused by antenna coupling, improve the clarity of signals of the antenna unit 100 in different communication frequency bands and the reliability of communication, improve the overall communication quality, and there is no need to connect the isolation structure 200 to the antenna ground, so the complexity of the entire system is reduced and it is convenient to be integrated into existing electronic devices. The display part 3001 is used for displaying a user interface, application content, and other visual information. The main body part 3002 is used for processing user input and system operations. At least part of the housing forming the receiving space 3003 is made of an insulating material or has an opening to avoid shielding of wireless signals and ensure that wireless signals can be transmitted smoothly inside the device.

[0143] Such as Figures 1 to 7As shown, in some embodiments, the device body 300 includes a main body part 3002 and a display part 3001 that are rotatably connected, and the antenna module is disposed in the accommodation space 3003 formed by the main body part 3002;

[0144] The isolation structure 200 includes a metamaterial array formed by a plurality of isolation units A. An equivalent capacitance in series and an equivalent inductance in parallel can be formed between two adjacent isolation units A. When the antenna unit 100 is in a working state, the metamaterial array exhibits a negative equivalent permittivity and / or a negative permeability within a target resonance frequency band to isolate the wireless signal in the target frequency band between the first antenna 1001 and the second antenna 1002;

[0145] And / or,

[0146] The radiator structure includes a first radiator structure 1 formed by a plurality of branch structures and a second radiator structure 2 formed by a plurality of branch structures. The first radiator structure 1 and the second radiator structure are arranged in central symmetry or axial symmetry.

[0147] Specifically, the housing of the main body part 3002 and the housing of the display part 3001 can be rotatably connected through a hinge structure or a magnetic suction type rotating shaft, etc. The design of the rotatable connection not only achieves efficient antenna isolation and optimized signal transmission, but also improves the user experience through a flexible usage method. The device body 300 can be a laptop computer or a foldable mobile phone, etc.

[0148] The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An antenna module, comprising: An antenna unit, including a first antenna and a second antenna arranged at intervals; An isolation structure arranged between the first antenna and the second antenna, the isolation structure including at least one isolation unit, and the isolation unit including a radiator structure with symmetrically arranged stub structures; Wherein, the radiator structure enables the isolation unit to exhibit a negative refractive index characteristic at the operating frequency of the antenna unit, so as to isolate the wireless signals in the target frequency band between the first antenna and the second antenna.

2. The antenna module according to claim 1, wherein the radiator structure includes a first radiator structure composed of a plurality of stub structures and a second radiator structure composed of a plurality of stub structures, and the first radiator structure and the second radiator structure are arranged in central symmetry or axial symmetry; And / or, A series equivalent capacitance and a parallel equivalent inductance can be formed between the plurality of stub structures of the first radiator structure and the second radiator structure, so that the radiator structure has a negative refractive index characteristic at the operating frequency of the antenna unit.

3. The antenna module according to claim 2, wherein the isolation structure includes a metamaterial array formed by a plurality of isolation units arranged at intervals, and a series equivalent capacitance and a parallel equivalent inductance can be formed between two adjacent isolation units. When the antenna unit is in an operating state, the metamaterial array exhibits a characteristic of negative equivalent permittivity and / or negative permeability in the target resonance frequency band, so as to isolate the wireless signals in the target frequency band between the first antenna and the second antenna; And / or, The first radiator structure includes a first split ring resonator, the second radiator structure includes a second split ring resonator, the first split ring resonator and the second split ring resonator share a first stub, and the first split ring resonator and the second split ring resonator are symmetrically arranged on both sides of the center line of the first stub along the extension direction.

4. The antenna module according to claim 3, wherein, The first radiator structure further includes a third split ring resonator nested in the first split ring resonator, and a first spiral stub nested in the third split ring resonator, and a second stub of the third split ring resonator is connected to the first stub in a direction perpendicular to the extension direction; The openings of the first split ring resonator and the openings of the third split ring resonator are arranged staggeredly; The second radiator structure further includes a fourth split ring resonator nested in the second split ring resonator, and a second spiral stub nested in the fourth split ring resonator, and a third stub of the fourth split ring resonator is connected to the first stub in a direction perpendicular to the extension direction; The openings of the second split ring resonator and the openings of the fourth split ring resonator are arranged staggeredly; The third split ring resonator and the fourth split ring resonator are arranged in central symmetry, and the first spiral stub and the second spiral stub are arranged in central symmetry.

5. The antenna module according to claim 4, wherein, The third split-ring resonator and the fourth split-ring resonator are symmetrically arranged on both sides of the center line of the first branch along the extension direction, and the first spiral branch and the second spiral branch are symmetrically arranged on both sides of the center line of the first branch along the extension direction; And / or, Both the first split-ring resonator and the second split-ring resonator include two fourth branches arranged perpendicular to the extension direction of the first branch and connected to the opposite ends of the first branch in the extension direction, and a fifth branch connected to the two fourth branches, and a first notch is provided in the fifth branch; The third split-ring resonator includes a sixth branch arranged at an interval from the second branch, and two eighth branches arranged perpendicular to the extension direction of the sixth branch and connected to the opposite ends of the sixth branch in the extension direction, and a second notch is provided between the second branch and one of the eighth branches; The fourth split-ring resonator includes a seventh branch arranged at an interval from the third branch, and two eighth branches arranged perpendicular to the extension direction of the seventh branch and connected to the opposite ends of the seventh branch in the extension direction, and a second notch is provided between the third branch and one of the eighth branches; The fixed ends of the first spiral branch and the second spiral branch are respectively connected to the second branch and the third branch in a direction perpendicular to the extension direction, and the free ends are respectively arranged within the annular structure formed by the spiral branches.

6. The antenna module according to claim 3, wherein, The first radiation structure further includes a third spiral branch nested within the first split-ring resonator, and a fourth spiral branch nested within the annular structure formed by the third spiral branch; The second radiation structure further includes a fifth spiral branch nested within the second split-ring resonator, and a sixth spiral branch nested within the annular structure formed by the fifth spiral branch; The third spiral branch and the fifth spiral branch are symmetrically arranged on both sides of the center line of the first branch along the extension direction; The fourth spiral branch and the sixth spiral branch are symmetrically arranged on both sides of the center line of the first branch along the extension direction; And / or, There is a first distance between the third spiral branch and the fourth spiral branch, and a second distance between the third spiral branch and the first split-ring resonator, and the first distance and the second distance are the same or different.

7. The antenna module according to claim 6, wherein, The third spiral branch and the fifth spiral branch are centrosymmetrically arranged, and the fourth spiral branch and the sixth spiral branch are centrosymmetrically arranged; And / or, Both the fourth spiral branch and the sixth spiral branch include a first sub-branch, a second sub-branch, a third sub-branch, and a fourth sub-branch connected in sequence, the first sub-branch is perpendicular to the first branch, and at least one fifth sub-branch perpendicular to the third sub-branch is provided between the second sub-branch and the fourth sub-branch.

8. The antenna module according to claim 4, wherein, The target frequency band includes the 2.4 GHz frequency band and / or the 5G - 7 GHz frequency band; And / or, The total length of the branches of the first split-ring resonator and the second split-ring resonator has a negative correlation with the resonant frequency of the isolation unit; And / or, The structural parameters of the second split-ring resonator, the third split-ring resonator, the first spiral stub, and the second spiral stub are related to the resonant frequency of the isolation unit.

9. An electronic device, comprising a device body having an accommodation space and an antenna module disposed in the accommodation space, the antenna module including: An antenna unit including a first antenna and a second antenna spaced apart; An isolation structure disposed between the first antenna and the second antenna, the isolation structure including at least one isolation unit, and the isolation unit including a radiator structure with symmetrically arranged stub structures; Wherein, the radiator structure enables the isolation unit to exhibit a negative refractive index characteristic at the operating frequency of the antenna unit, so as to isolate wireless signals in a target frequency band between the first antenna and the second antenna; Wherein, the device body includes a display part composed of a housing and a display screen and / or a main body part composed of a housing and an input device, and the antenna module is disposed in the accommodation space formed by the display part or the main body part, wherein at least part of the housing forming the accommodation space is made of an insulating material or the accommodation space has an opening.

10. The electronic device according to claim 9, wherein, The device body includes a main body part and a display part that are rotatably connected, and the antenna module is disposed in the accommodation space formed by the main body part; The isolation structure includes a metamaterial array formed by a plurality of isolation units, and an equivalent capacitance in series and an equivalent inductance in parallel can be formed between two adjacent isolation units. When the antenna unit is in an operating state, the metamaterial array exhibits a characteristic of negative equivalent permittivity and / or negative permeability in a target resonant frequency band, so as to isolate wireless signals in a target frequency band between the first antenna and the second antenna; And / or The radiator structure includes a first radiator structure composed of a plurality of stub structures and a second radiator structure composed of a plurality of stub structures, and the first radiator structure and the second radiator structure are centrosymmetrically arranged or axially symmetrically arranged.

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