Antenna device and electronic equipment

Abstract

The embodiment of the invention provides an antenna device and electronic equipment, the antenna device comprises a first radiator, the first radiator is grounded, the first radiator forms a cavity, the cavity is provided with openings in a first direction, a second direction and a third direction, the first direction deviates from the third direction, and the second direction is perpendicular to the first direction and the third direction; the second radiating body is electrically connected with the first radiating body, and the second radiating body extends along a third direction; the first radiator is used for feeding in an excitation signal, the first radiator transmits the excitation signal to generate first resonance, and the first radiator and the second radiator transmit the excitation signal together to generate second resonance. According to the antenna device provided by the embodiment of the invention, the frequency of the first resonance and the frequency of the second resonance can be independently adjusted, so that the working frequency band of the antenna device is more flexible, and the adaptability of the antenna device and the actual communication frequency band is improved.

Description

Technical Field

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

[0002] Electronic devices such as smartphones are usually equipped with multiple antennas, such as LB (Lower Band) antennas, MHB (Middle High Band) antennas, WIFI antennas, etc., to achieve corresponding communication functions.

[0003] In the related art, multiple resonances are usually achieved on the same antenna using fundamental mode and higher-order modes, thereby covering multiple frequency bands. However, the multiple resonances formed in this way are difficult to tune independently and are difficult to meet the actual communication frequency band requirements. Summary of the invention

[0004] The embodiments of the present application provide an antenna device and an electronic device, which can individually adjust the operating frequencies of different resonances to improve the compatibility of the antenna device with the actual communication frequency band.

[0005] An embodiment of the present application provides an antenna device, including:

[0006] a first radiator, the first radiator is grounded, the first radiator forms a cavity, the cavity has openings in a first direction, a second direction, and a third direction, the first direction and the third direction are opposite to each other, and the second direction is perpendicular to both the first direction and the third direction;

[0007] a second radiator, electrically connected to the first radiator, the second radiator extending along the third direction;

[0008] The first radiator is used to feed an excitation signal, the first radiator transmits the excitation signal to generate a first resonance, and the first radiator and the second radiator transmit the excitation signal together to generate a second resonance.

[0009] An embodiment of the present application further provides an electronic device, comprising the above-mentioned antenna device.

[0010] In the antenna device provided in the embodiment of the present application, since the first radiator forms a cavity and the first resonance is generated by the resonance of the cavity, the frequency of the first resonance is determined by the length of the first radiator along the second direction, and the second radiator extends along the third direction, so the frequency of the second resonance is determined by the length of the second radiator along the third direction. The frequency of the first resonance can be adjusted by setting the length of the first radiator along the second direction, and the frequency of the second resonance can be adjusted by setting the length of the second radiator along the third direction, so that the frequency of the first resonance and the frequency of the second resonance can be adjusted separately, so that the working frequency band of the antenna device is more flexible, and the adaptability of the antenna device to the actual communication frequency band is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0012] Figure 1 This is a schematic diagram of the first structure of the antenna device according to an embodiment of the present application.

[0013] Figure 2 This is a schematic diagram of a second structure of the antenna device according to an embodiment of the present application.

[0014] Figure 3 Schematic diagram of the structure of the first radiator and the second radiator of the antenna device according to an embodiment of the present application.

[0015] Figure 4 for Figure 3 A schematic diagram of the dimensions of the first radiator and the second radiator is shown.

[0016] Figure 5 FIG. 1 is a schematic diagram of current flow of an antenna device according to an embodiment of the present application.

[0017] Figure 6 Schematic diagram of current distribution when the antenna device according to an embodiment of the present application generates a first resonance.

[0018] Figure 7 Schematic diagram of current distribution when the antenna device according to an embodiment of the present application generates a second resonance.

[0019] Figure 8 This is a schematic diagram of a first S parameter of the antenna device according to an embodiment of the present application.

[0020] Fig. 9 FIG. 4 is a schematic diagram of the total radiation efficiency of the antenna device according to an embodiment of the present application.

[0021] Fig.10 It is a schematic diagram of a first simulation result of the antenna device according to an embodiment of the present application.

[0022] Fig.11 It is a schematic diagram of a second simulation result of the antenna device according to an embodiment of the present application.

[0023] Fig.12 Schematic diagram of current distribution when the antenna device according to an embodiment of the present application resonates in the B41 frequency band.

[0024] Fig.13 Schematic diagram of current distribution when the antenna device of an embodiment of the present application resonates at a lower frequency in the 5G frequency band WIFI.

[0025] Fig.14 Schematic diagram of current distribution when the antenna device of an embodiment of the present application resonates at a higher frequency in the 5G frequency band WIFI.

[0026] Fig.15 This is a schematic diagram of a third structure of the antenna device according to an embodiment of the present application.

[0027] Fig.16 It is a schematic diagram of a second S parameter of the antenna device according to an embodiment of the present application.

[0028] Fig.17 A schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] The embodiment of the present application provides an antenna device, which can be applied to electronic devices. The electronic devices can be devices such as smart phones, tablet computers, and can also be devices with wireless communication functions such as gaming devices, AR (Augmented Reality) devices, cars, laptops, and desktop computing devices.

[0031] refer to Figures 1 to 3 , Figure 1 1 is a schematic diagram of a first structure of the antenna device 10 according to an embodiment of the present application. Figure 2 1 is a schematic diagram of a second structure of the antenna device 10 according to an embodiment of the present application. Figure 3 Schematic diagram of the structure of the first radiator and the second radiator of the antenna device 10 according to an embodiment of the present application.

[0032] The antenna device 10 includes a floor 11 , a first radiator 12 , a second radiator 13 and a dielectric substrate 14 .

[0033] The floor 11 forms a reference ground, and the floor 11 can be used to ground other electronic devices in the antenna device 10, such as grounding a radiator. In practical applications, the floor 11 can be formed by at least a portion of any ground layer, ground plate, ground metal layer, etc. of an electronic device, or by at least a portion of any combination of the above-mentioned ground layers, ground plates, ground metal layers, etc.

[0034] The first radiator 12 is grounded. For example, the first radiator 12 can be connected to the floor 11 to achieve grounding. The first radiator 12 forms a cavity. Figure 3 As shown, the cavity formed by the first radiator 12 has openings in the first direction 12a, the second direction 12b, and the third direction 12c. Therefore, the first radiator 12 can be understood as a cavity with three openings. The first direction 12a and the third direction 12c are opposite to each other, and the second direction 12b is perpendicular to the first direction 12a and the third direction 12c. In an application example, the second direction 12b can be as follows Figure 3 The third direction 12c may be the y direction; the first direction 12a may be the opposite direction of the y direction, ie, the -y direction.

[0035] The second radiator 13 is electrically connected to the first radiator 12. For example, the second radiator 13 may be connected to an edge of the first radiator 12 to achieve electrical connection between the two. The second radiator 13 extends along the third direction 12c.

[0036] In practical applications, the first radiator 12 and the second radiator 13 can be arranged at the edge of the floor 11. The material of the first radiator 12 and the second radiator 13 can be a metal material, for example, a metal material such as a magnesium alloy, and the material of the first radiator 12 and the material of the second radiator 13 can be the same or different. In a feasible embodiment, the first radiator 12 and the second radiator 13 can be integrally formed. In another feasible embodiment, the first radiator 12 and the second radiator 13 can also be formed separately, and the first radiator 12 and the second radiator 13 are electrically connected.

[0037] At least a portion of the dielectric substrate 14 is located in the cavity formed by the first radiator 12. Figure 1As shown, a portion of the dielectric substrate 14 is located in the cavity, and another portion is exposed outside the cavity. The dielectric substrate 14 may be made of an insulating material, such as a resin material. In practical applications, the dielectric substrate 14 can provide support for the first radiator 12 and the second radiator 13. In order to facilitate the display of the structure of the antenna device 10, Figure 2 The dielectric substrate 14 is omitted.

[0038] Among them, the first radiator 12 is used to feed an excitation signal. The excitation signal can be an excitation signal of the type of 4G communication, 5G communication, WIFI communication, etc. The first radiator 12 is used to transmit the excitation signal to generate a first resonance, and radiate a wireless signal of the first resonance to the outside. It can be understood that the first resonance is generated by the resonance of the cavity with three-sided openings formed by the first radiator 12. The first radiator 12 and the second radiator 13 are also used to jointly transmit the excitation signal to generate a second resonance, and jointly radiate a wireless signal of the second resonance to the outside.

[0039] It can be understood that, since the first radiator 12 forms a cavity, the first resonance is generated by the resonance of the cavity, and therefore the frequency of the first resonance is determined by the length of the first radiator 12 along the second direction 12b (ie Figure 3 The second radiator 13 extends along the third direction 12c, so the frequency of the second resonance is determined by the length of the second radiator 13 along the third direction 12c (ie Figure 3 Therefore, the frequency of the first resonance can be adjusted by setting the length of the first radiator 12 along the second direction 12b, and the frequency of the second resonance can be adjusted by setting the length of the second radiator 13 along the third direction 12c, so that the frequency of the first resonance and the frequency of the second resonance can be adjusted separately, making the working frequency band of the antenna device 10 more flexible and improving the compatibility of the antenna device with the actual communication frequency band.

[0040] In some embodiments, while referring to Figure 4 , Figure 4 for Figure 3 A schematic diagram of the dimensions of the first radiator and the second radiator is shown.

[0041] The first radiator 12 extends in the second direction 12b (i.e. Figure 3 The second radiator 13 has a first length d1 along the third direction 12c (ie Figure 3 The first radiator 12 has a second length d2 along the third direction 12c (ie Figure 3 y direction shown) has a third direction d3.

[0042] The frequency of the first resonance is negatively correlated with the first length d1, that is, the larger the first length d1 is, the lower the frequency of the first resonance is; the smaller the first length d1 is, the higher the frequency of the first resonance is. The frequency of the second resonance is negatively correlated with the second length d2, that is, the larger the second length d2 is, the lower the frequency of the second resonance is; the smaller the second length d2 is, the higher the frequency of the second resonance is.

[0043] In practical applications, the frequency of the first resonance can be adjusted by setting d1 to a suitable size so that the first resonance covers the desired frequency band, for example, the first resonance covers the 5G frequency band of WIFI communication (frequency range 5.15GHz to 5.85GHz). The frequency of the second resonance can also be adjusted by setting d2 to a suitable size so that the second resonance covers the desired frequency band, for example, the second resonance covers the N78 frequency band of 5G communication (frequency range 3.3GHz to 3.8GHz). Therefore, the frequency of the first resonance and the frequency of the second resonance can be adjusted separately by adjusting the size of d1 and d2.

[0044] In some embodiments, continue to refer to Figure 3 The first radiator 12 includes a first metal part 121, a second metal part 122 and a metal connecting part 123. The second metal part 122 is parallel to and spaced from the first metal part 121. The metal connecting part 123 is connected to the same side of the first metal part 121 and the second metal part 122 to form the above-mentioned cavity.

[0045] In practical applications, the first radiator 12 may be a thin sheet of metal bent into a C shape. The first metal portion 121 may be a metal portion abutting against the lower surface of the dielectric substrate 14 , the second metal portion 122 may be a metal portion abutting against the upper surface of the dielectric substrate 14 , and the metal connecting portion 123 may be a metal portion abutting against the side surface of the dielectric substrate 14 .

[0046] In some embodiments, Figure 3 As shown, the first radiator 12 includes a grounding point and a feeding point, such as a feeding point 125. The grounding point is set on the first metal part 121, and the feeding point 125 is set on the second metal part 122. The grounding point is grounded, for example, the grounding point is connected to the floor 11, so that the first radiator 12 is grounded. The feeding point 125 is used to feed an excitation signal to excite the first radiator 12 to generate the above-mentioned first resonance, and to excite the first radiator 12 and the second radiator 13 to jointly generate the above-mentioned second resonance.

[0047] The second radiator 13 is connected to the second metal portion 122 , so that the second radiator 13 is electrically connected to the first radiator 12 .

[0048] In some embodiments, Figure 3As shown, the grounding points include a first grounding point 1241 and a second grounding point 1242 that are spaced apart. The first grounding point 1241 and the second grounding point 1242 are both grounded. The first grounding point 1241 and the second grounding point 1242 are spaced apart along the third direction 12c (i.e. Figure 3 The positive projection of the feeding point 125 on the first metal part 121 is located between the first grounding point 1241 and the second grounding point 1242. It can be understood that the first grounding point 1241 and the second grounding point 1242 are provided at the same time, so that the first radiator 12 can have a better grounding effect.

[0049] In some embodiments, continue to refer to Figure 2 and Figure 3 , the antenna device 10 also includes a first grounding member 151, a second grounding member 152 and a feeding member 16. The first grounding member 151, the second grounding member 152 and the feeding member 16 can all be formed by metal materials, for example, the first grounding member 151, the second grounding member 152 and the feeding member 16 can all be metal columns. In addition, it can be understood that the antenna device 10 can also include a feed source, which is used to provide the above-mentioned excitation signal. In practical applications, the feed source can be set on a circuit board of the electronic device, for example, on a main board, or on an independent small board.

[0050] The floor 11 is disposed on a side of the first metal portion 121 away from the second metal portion 122. The first grounding member 151 is connected to the first grounding point 1241 and the floor 11, so that the first radiator 12 is grounded through the first grounding point 1241. The second grounding member 152 is connected to the second grounding point 1242 and the floor 11, so that the first radiator 12 is grounded through the second grounding point 1242. Thus, the first radiator 12 can have a good grounding effect.

[0051] The feed source may be disposed on the side of the first metal portion 121 away from the second metal portion 122. In a feasible implementation, a portion of an insulating area may be disposed on the floor 11, and the feed source may be disposed in the insulating area, thereby eliminating the need to separately provide a structure for carrying the feed source, and simplifying the overall structural design of the antenna device 10.

[0052] Among them, the first metal part 121 is provided with a through hole 126, and the through hole 126 is located between the first grounding point 1241 and the second grounding point 1242. In practical applications, the area where the through hole 126 is located may include the positive projection area of ​​the feeding point 125 on the first metal part 121. The feeder 16 is arranged in the through hole 126 and is connected to the feeding point 125 and the feed source, so that the feed source feeds the excitation signal to the first radiator 12 through the feeding point 125. It can be understood that the aperture of the through hole 126 can be larger than the cross-sectional area of ​​the feeder 16 to ensure that the feeder 16 does not contact the hole wall of the through hole 126, thereby ensuring electrical insulation between the feeder 16 and the first metal part 121.

[0053] Also refer to Figure 5 , Figure 5 FIG. 1 is a schematic diagram of current flow of the antenna device 10 according to an embodiment of the present application.

[0054] The first resonance forms a first resonant current I1. The first resonant current I1 flows from the first metal part 121 to the second metal part 122 via the metal connecting part 123. The first resonant current I1 is symmetrically distributed about the feeding point 125. In practical applications, the first resonant current I1 of the first metal part 121 and the metal connecting part 123 is relatively weak (as shown by the dotted line in the figure), and the first resonant current I1 of the second metal part 122 is relatively strong (as shown by the solid line in the figure).

[0055] The second resonance forms a second resonant current I2. The second resonant current I2 flows from the first metal part 121 to the second metal part 122 via the metal connection part 123, and flows to the second radiator 13 via the second metal part 122. The second resonance can be equivalent to an IFA (Inverted-F antenna) mode resonance, so the second resonant current I2 is mainly distributed in the part between the feeding point 125 and the connection between the first radiator 12 and the second radiator 13, and in the second radiator 13. In actual applications, the second resonant current I2 of the first metal part 121 and the metal connection part 123 is relatively weak (as shown by the dotted line in the figure), and the second resonant current I2 of the second metal part 122 and the second radiator 13 is relatively strong (as shown by the solid line in the figure).

[0056] refer to Figure 6 and Figure 7 , Figure 6 Schematic diagram of current distribution when the antenna device 10 generates a first resonance according to an embodiment of the present application. Figure 7 Schematic diagram of current distribution when the antenna device 10 generates a second resonance according to an embodiment of the present application. Figure 6 It can be seen that the current of the first resonance is mainly distributed around the feeding point 125. Figure 7 It can be seen that the second resonant current is mainly distributed around the connection portion between the first radiator 12 and the second radiator 13 .

[0057] refer to Figures 8 to 10 , Figure 8 Schematic diagram of a first S parameter of the antenna device 10 according to an embodiment of the present application. Fig. 9 is a schematic diagram of the total radiation efficiency of the antenna device 10 according to an embodiment of the present application, Fig.10 It is a schematic diagram of a first simulation result of the antenna device 10 according to an embodiment of the present application.

[0058] in, Figure 8 The frequency corresponding to the mark point 1 in the figure is about 4.6 GHz, and the frequency corresponding to the mark point 2 is about 5.4 GHz. In practical applications, the frequency corresponding to the mark point 1 can be the frequency of the first resonance, and the frequency corresponding to the mark point 2 can be the frequency of the second resonance; or the frequency corresponding to the mark point 1 can be the frequency of the second resonance, and the frequency corresponding to the mark point 2 can be the frequency of the first resonance. Fig. 9 It can be seen that the antenna device 10 has a relatively high total radiation efficiency in the frequency range of 4 GHz to 6 GHz.

[0059] Fig.10 In the figure, L1 is an example of an S parameter curve of the antenna device 10 in practical applications, and L2 is an example of a total radiation efficiency curve of the antenna device 10 in practical applications. The size of the antenna device 10 can be adjusted, for example, by adjusting the above-mentioned sizes d1 and d2, so that the first resonance covers the 5G frequency band of WIFI communication (such as Fig.10 As shown in the middle mark point 2, the frequency range is 5.15GHz~5.85GHz), so that the second resonance covers the N78 frequency band of 5G communication (such as Fig.10 As shown at point 1 in the middle, the frequency range is 3.3GHz to 3.8GHz).

[0060] In some embodiments, by adjusting the size of the antenna device 10, such as adjusting the above-mentioned sizes d1, d2 and d3, the first radiator 12 and the second radiator 13 can also transmit the excitation signal together to generate a third resonance, which is a higher-order mode of the second resonance.

[0061] For example, in an application example, the above-mentioned dimension d1 is set to 7.72 mm, the above-mentioned dimension d2 is set to 12.88 mm, and the above-mentioned dimension d3 is set to 17.23 mm, so that the antenna device 10 can simultaneously generate the above-mentioned first resonance, second resonance and third resonance. Among them, the first resonance covers the lower frequency in the 5G frequency band of WIFI communication, the second resonance covers the B41 frequency band (frequency range 2496 MHz to 2690 MHz) of 4G communication, and the third resonance covers the higher frequency in the 5G frequency band of WIFI communication. Therefore, the antenna device 10 can generate two modes of WIFI resonance, covering the larger bandwidth of WIFI communication and improving the performance of WIFI communication. It can be understood that in other embodiments, the first resonance and the third resonance can also form different communication modes respectively, for example, one of them covers the frequency band of 5G communication and the other covers the frequency band of WIFI communication.

[0062] refer to Fig.11 , Fig.11 Schematic diagram of the second simulation result of the antenna device 10 of the embodiment of the present application. Among them, L3 is the S parameter curve of the three resonant modes generated by the antenna device 10, and L4 is the total radiation efficiency curve of the three resonant modes generated by the antenna device 10. The marked point 1 in the figure represents the frequency of the second resonance, covering the B41 frequency band of 4G communication, and the frequency is about 2.7GHz; the marked point 2 represents the frequency of the first resonance, covering the 5G frequency band of WIFI communication, and the frequency is about 5.0GHz; the marked point 3 represents the frequency of the third resonance, and the third resonance is the higher-order mode of the second resonance. The third resonance covers the 5G frequency band of WIFI communication, and the frequency is about 5.4GHz.

[0063] Also refer to Figure 12 to Figure 14 , Fig.12 Schematic diagram of current distribution when the antenna device 10 according to the embodiment of the present application resonates in the B41 frequency band. Fig.13 Schematic diagram of current distribution when the antenna device 10 of the embodiment of the present application resonates at a lower frequency in the 5G frequency band WIFI, Fig.14 Schematic diagram of current distribution when the antenna device 10 according to an embodiment of the present application resonates at a higher frequency in the 5G band WIFI.

[0064] refer to Fig.15 , Fig.15 : This is a third structural schematic diagram of the antenna device 10 of an embodiment of the present application. The antenna device 10 also includes a tuner M. Among them, the second radiator 13 is electrically connected to the first radiator 12 through the tuner M. The tuner M is used to adjust the frequency of the second resonance. In practical applications, the tuner M may include impedance elements such as inductors and capacitors. By changing the impedance of the tuner M, the frequency of the second resonance can be adjusted so that the second frequency adapts to the required communication frequency band.

[0065] Also refer to Fig.16 , Fig.16 Schematic diagram of the second S parameter of the antenna device 10 of the embodiment of the present application. Among them, L51, L52, and L53 respectively represent the S parameter curves of the antenna device 10 when the tuner M is of different impedances. It can be seen from the figure that when the tuner M is adjusted to different impedances, the frequency of the second resonance can be changed. Since the third resonance is a higher-order mode of the second resonance, the frequency of the third resonance also changes synchronously, while the frequency of the first resonance hardly changes, indicating that adjusting the impedance of the tuner M will not affect the frequency of the first resonance.

[0066] The embodiment of the present application also provides an electronic device. The electronic device may be a smart phone, a tablet computer, or a gaming device, an AR (Augmented Reality) device, a car, a laptop computer, a desktop computing device, or other device with wireless communication function.

[0067] refer to Fig.17 , Fig.17 1 is a schematic diagram of the structure of an electronic device 100 according to an embodiment of the present application. The electronic device 100 includes an antenna device 10 and a housing 20. The antenna device 10 is disposed in the housing 20. The antenna device 10 may be the antenna device 10 of any of the above embodiments.

[0068] In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0069] It should be pointed out that in the embodiments of the present application, “electrical connection” can be a direct connection between two electrical components to achieve electrical connection, or it can be an indirect connection to achieve electrical connection.

[0070] The antenna device and electronic device provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An antenna device, characterized in that: include: a first radiator, the first radiator is grounded, the first radiator forms a cavity, the cavity has openings in a first direction, a second direction, and a third direction, the first direction and the third direction are opposite to each other, and the second direction is perpendicular to both the first direction and the third direction; a second radiator, electrically connected to the first radiator, the second radiator extending along the third direction; The first radiator is used to feed an excitation signal, the first radiator transmits the excitation signal to generate a first resonance, and the first radiator and the second radiator transmit the excitation signal together to generate a second resonance.

2. The antenna device according to claim 1, characterized in that The first radiator has a first length along the second direction, and the second radiator has a second length along the third direction; The frequency of the first resonance is negatively correlated with the first length, and the frequency of the second resonance is negatively correlated with the second length.

3. The antenna device according to claim 1 or 2, characterized in that: The first radiator comprises: First Metal Division; a second metal portion, arranged parallel to and spaced apart from the first metal portion; The metal connecting portion is connected to the same side of the first metal portion and the second metal portion to form the cavity.

4. The antenna device according to claim 3, characterized in that: The first radiator comprises: A grounding point, disposed on the first metal portion, the grounding point being grounded; A feeding point, arranged on the second metal portion, the feeding point being used to feed the excitation signal; Wherein, the second radiator is connected to the second metal part.

5. The antenna device according to claim 4, characterized in that: The grounding points include a first grounding point and a second grounding point that are spaced apart, the first grounding point and the second grounding point are both grounded, and the first grounding point and the second grounding point are arranged along the third direction; An orthographic projection of the feeding point on the first metal portion is located between the first grounding point and the second grounding point.

6. The antenna device according to claim 5, characterized in that The first resonant current of the first resonance flows from the first metal part to the second metal part via the metal connecting part, and the first resonant current is symmetrically distributed about the feeding point.

7. The antenna device according to claim 5, characterized in that: The second resonance current of the second resonance flows from the first metal part to the second metal part via the metal connecting part, and flows to the second radiator via the second metal part.

8. The antenna device according to claim 5, characterized in that: The first metal portion is provided with a through hole, and the through hole is located between the first grounding point and the second grounding point. The antenna device further includes: a floor, arranged on a side of the first metal part away from the second metal part; a first grounding member connected to the first grounding point and the floor; a second grounding member connected to the second grounding point and the floor; A feed source is arranged on a side of the first metal portion away from the second metal portion, and the feed source is used to provide the excitation signal; A feeding component is provided through the through hole and is connected to the feeding point and the feed source, so that the feed source feeds the excitation signal through the feeding point.

9. The antenna device according to claim 1 or 2, characterized in that: The first radiator and the second radiator also transmit the excitation signal together to generate a third resonance, and the third resonance is a higher-order mode of the second resonance.

10. The antenna device according to claim 1 or 2, characterized in that: A tuner is also included, through which the second radiator is electrically connected to the first radiator, and the tuner is used to adjust the frequency of the second resonance.

11. The antenna device according to claim 1 or 2, characterized in that: A dielectric substrate is also included, at least a portion of which is located in the cavity.

12. An electronic device, characterized in that: The invention comprises the antenna device according to any one of claims 1 to 11.

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