Dual ground coupled antenna and electronic device

Abstract

The application provides a double-ground coupling antenna and an electronic device, which can be applied to the technical field of antennas. The double-ground coupling antenna comprises a first metal ground plate, a second metal ground plate and a radiator. The radiator is arranged between the first metal ground plate and the second metal ground plate. The radiator comprises a first radiation branch and a second radiation branch which are connected to each other. The first radiation branch is spaced apart from the first metal ground plate by a first distance. The first radiation branch is spaced apart from the second metal ground plate by a second distance. One end of the second radiation branch is connected to the first metal ground plate. The other end of the second radiation branch is connected to the second metal ground plate. The first metal ground plate and the second metal ground plate are respectively configured to shield electromagnetic interference from the surroundings of the double-ground coupling antenna.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more specifically to a dual-grounded coupled antenna and electronic device. Background Technology

[0002] Generally, before installing an antenna into an electronic device, a clearance area needs to be reserved within the device. Then, considering the impact of the surrounding environment on signal interference, the antenna structure is designed. Finally, the designed antenna is installed within the clearance area. It is evident that the antenna structure needs to be modified according to changes in the installation environment. Different installation environments require different antenna structures to adapt to them. This antenna design method is time-consuming and labor-intensive, and also limits its application scenarios. Summary of the Invention

[0003] In view of the above problems, this application provides a dual-grounded coupled antenna and electronic device that can improve antenna performance stability and assembly applicability.

[0004] According to a first aspect of this application, a dual-ground-coupled antenna is provided, comprising: a first metal ground plane; a second metal ground plane; and a radiator; wherein the radiator is disposed between the first metal ground plane and the second metal ground plane, the radiator comprising a first radiating stub and a second radiating stub connected to each other, the first radiating stub being spaced apart from the first metal ground plane by a first distance, the first radiating stub being spaced apart from the second metal ground plane by a second distance, one end of the second radiating stub being connected to the first metal ground plane, and the other end of the second radiating stub being connected to the second metal ground plane; the first metal ground plane and the second metal ground plane are respectively configured to shield electromagnetic interference from the vicinity of the dual-ground-coupled antenna.

[0005] According to an embodiment of this application, the radiator is configured to excite a first resonance, a second resonance, and a third resonance, wherein the frequency of the first resonance is 2.4 GHz, the frequency of the second resonance is 5 GHz, and the frequency of the third resonance is 6 GHz.

[0006] According to an embodiment of this application, the distance between the first metal floor and the second metal floor matches one-tenth of the wavelength of the first resonant frequency.

[0007] According to an embodiment of this application, the first metal floor and the second metal floor each include at least one through hole;

[0008] The via is configured to fix the dual grounded coupled antenna in the target device, wherein the position of the via is determined according to the target device.

[0009] According to an embodiment of this application, the dual-grounded coupled antenna further includes: a matching module disposed on a second metal ground plane and opposite to a first metal ground plane, wherein the length of the second metal ground plane is less than the length of the first metal ground plane; the matching module is configured to compensate for resonant frequency shift caused by changes in the position of the via.

[0010] According to an embodiment of this application, a matching module includes: a dielectric substrate; a matching circuit; a third metal ground; and a fourth metal ground, wherein the fourth metal ground, the third metal ground, and the matching circuit are respectively disposed on the dielectric substrate on a side opposite to the first metal ground; the fourth metal ground is electrically connected to the third metal ground through the matching circuit, wherein the matching circuit includes a plurality of inductors and a plurality of capacitors; the matching circuit is configured to compensate for resonant frequency shift by adjusting the inductance value of the inductors and the capacitance value of the capacitors.

[0011] According to an embodiment of this application, the matching module further includes: a fifth metal ground, which is disposed on the other side of the dielectric substrate, one end of the fifth metal ground is connected to at least one of the third metal ground and the fourth metal ground, and the other end of the fifth metal ground is connected to the second metal ground.

[0012] According to an embodiment of this application, the dual-ground coupled antenna further includes: a feed section, one end of which is connected to a fourth metal ground plane, and the other end of which is connected to a first radiating stub; the feed section is configured to feed excitation to the radiator.

[0013] According to an embodiment of this application, the dual-grounded coupled antenna further includes: a coaxial line, the coaxial line including: a center conductor connected to a third metal ground plane; and an outer conductor connected to a second metal ground plane.

[0014] A second aspect of this application provides an electronic device including a dual-grounded coupled antenna as described in any of the embodiments above.

[0015] The dual-ground coupled antenna of this application sets a metal ground plane at each of the upper and lower positions of the radiator. The first radiating branch is not directly connected to either of these two metal ground planes. The first radiating branch is coupled to the first metal ground plane and the second metal ground plane respectively. The second radiating branch is directly connected to the first metal ground plane and the second metal ground plane respectively. The first radiating branch is connected to the second radiating branch. In this way, a semi-enclosed resonant cavity can be formed to block electromagnetic interference from the surrounding environment, so as to protect the antenna from the influence of the surrounding environment, thereby improving the stability of the antenna performance. This is beneficial for installing the antenna on any device, improving the antenna development efficiency, and expanding the application scenarios of the antenna.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] The above-mentioned contents, other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 A schematic diagram of the overall structure of a dual-grounded coupled antenna according to an embodiment of this application is shown.

[0019] Figure 2 A schematic diagram illustrating the structure of a matching module according to an embodiment of this application is shown.

[0020] Figure 3 A schematic diagram of the power supply section structure according to an embodiment of this application is shown;

[0021] Figure 4 A schematic diagram illustrating the structural dimensions of a dual-grounded coupled antenna according to an embodiment of this application is shown.

[0022] Figure 5 A schematic diagram of a dual-grounded coupled antenna in a hinged cover plate according to an embodiment of this application is shown.

[0023] Figure 6 The gain test results of a dual-ground-coupled antenna according to an embodiment of this application are illustrated schematically.

[0024] Figure 7 The return loss test results of a dual-grounded coupled antenna according to an embodiment of this application are illustrated schematically.

[0025] Explanation of the numbers in the diagram: 1-First metal ground plane, 2-Second metal ground plane, 3-Radiator, 31-First radiating branch, 32-Second radiating branch, 4-Via, 5-Matching module, 51-Dielectric substrate, 52-Matching circuit, 521-First matching circuit, 522-Second matching circuit, 523-Third matching circuit, 53-Third metal ground plane, 531-First part of the third metal ground plane, 532-Second part of the third metal ground plane, 54-Fourth metal ground plane, 541-First part of the fourth metal ground plane, 542-Second part of the fourth metal ground plane, 55-Fifth metal ground plane, 6-Power supply section, 61-Power supply point, 62-Matching branch, 7-Coaxial cable, 8-Screw, 9-Hinge cover plate, 10-C-side cover plate. Detailed Implementation

[0026] The embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this application. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of this application for ease of explanation. However, it will be apparent that one or more embodiments may be implemented without these specific details. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0028] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0029] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0030] Figure 1 The schematic diagram illustrates the overall structure of the dual-grounded coupled antenna according to an embodiment of this application.

[0031] In some embodiments, such as Figure 1 As shown, the dual-ground coupled antenna 100 includes: a first metal ground plane 1; a second metal ground plane 2; and a radiator 3; wherein the radiator 3 is disposed between the first metal ground plane 1 and the second metal ground plane 2, and the radiator 3 includes a first radiating branch 31 and a second radiating branch 32 connected to each other. The first radiating branch 31 is spaced apart from the first metal ground plane 1 by a first distance, and the first radiating branch 31 is spaced apart from the second metal ground plane 2 by a second distance. One end of the second radiating branch 32 is connected to the first metal ground plane 1, and the other end of the second radiating branch 32 is connected to the second metal ground plane 2; the first metal ground plane 1 and the second metal ground plane 2 are respectively configured to shield electromagnetic interference from the vicinity of the dual-ground coupled antenna.

[0032] Furthermore, placing two metal ground planes on the top and bottom sides of the radiator creates stable field cutoff boundaries in the vertical direction, strengthening electromagnetic field confinement and forming a semi-enclosed resonant cavity. This reduces unwanted mode leakage and improves the purity of the dominant mode and far-field directivity. These two metal ground planes can be considered equivalent to the boundaries of frequency-selective surfaces. Installing the dual-grounded coupled antenna into the device, with the metal ground planes on the top and bottom sides of the radiator, effectively shields common-mode noise and high-frequency coupling interference from within the device. Specifically, the first and second metal ground planes can form a semi-closed current loop, blocking the common-mode current within the device. In addition, the current of the dual-grounded coupled antenna is mainly concentrated inside the antenna, forming a local resonant field pattern inside the antenna, preventing field energy leakage. Therefore, it can filter high-frequency waves leaked from external metals (i.e., metals inside the device other than the installed dual-grounded coupled antenna, such as heat sinks and metals on the side of the casing), effectively reducing the impact of the external environment on the performance of the dual-grounded coupled antenna, thereby reducing the crosstalk between the high-speed signals of the system (such as signals transmitted by the fifth-generation double data rate synchronous dynamic random access memory and the fourth-generation universal serial bus) and the antenna radiation field, and reducing the peak transmit energy.

[0033] Furthermore, the dual-grounded coupled antenna 100 also includes a matching module 5, which is disposed on the second metal ground plane and opposite to the first metal ground plane, wherein the length of the second metal ground plane is less than the length of the first metal ground plane; the matching module is configured to compensate for the resonant frequency shift caused by the positional change of the via. Furthermore, vias 4 are respectively provided on the first and second metal ground planes, through which the dual-grounded coupled antenna 100 can be installed in different devices.

[0034] In some embodiments, the radiator can be a radiator of different types of antennas such as an inverted-F antenna, a monopole antenna, and a dipole antenna. The via 4 can be flexibly set according to the component distribution in the installation area to realize antenna modularization, so that the antenna is not affected by the installation environment, can be flexibly installed in devices in different environments, and maintain good antenna performance.

[0035] According to an embodiment of this application, a metal ground plane is provided at two positions above and below the radiator. The first radiating branch is not directly connected to either of these two metal ground planes. The first radiating branch is coupled to the first metal ground plane and the second metal ground plane respectively. The second radiating branch is directly connected to the first metal ground plane and the second metal ground plane respectively. The first radiating branch is connected to the second radiating branch. In this way, a semi-enclosed resonant cavity can be formed to block electromagnetic interference from the surrounding environment of the antenna, so that the antenna is not affected by the surrounding environment, thereby improving the stability of the antenna performance. This is beneficial for installing the antenna on any device, improving the antenna development efficiency, and expanding the application scenarios of the antenna.

[0036] Furthermore, by using the matching module to compensate for the resonant frequency shift caused by the change in via position, the shift of each frequency point can be quickly and accurately tuned. During the process of installing the antenna into various devices, there is no need to modify the antenna structure. Only the via position needs to be determined and the matching module is used for tuning to complete the installation, thereby improving the adaptability of the antenna to the environment and improving the antenna development efficiency.

[0037] In some embodiments, the radiator is configured to excite a first resonance, a second resonance, and a third resonance, wherein the frequency of the first resonance is 2.4 GHz, the frequency of the second resonance is 5 GHz, and the frequency of the third resonance is 6 GHz.

[0038] Furthermore, the radiator structure can be designed according to the target frequency band. For example, if the target frequency band covers the 2.4 GHz band, the 5 GHz band, and the 6 GHz band, then the radiator needs to be designed to excite the three frequency bands, and the size of the radiating stub corresponding to each frequency band is matched with a quarter wavelength of that frequency band.

[0039] According to embodiments of this application, the antenna can cover all frequency bands of Wi-Fi 7 and is applicable to more communication scenarios.

[0040] Figure 2 A schematic diagram of the matching module structure according to an embodiment of this application is shown.

[0041] In some embodiments, such as Figure 2 As shown, the matching module 5 includes: a dielectric substrate 51; a matching circuit 52; a third metal ground plane 53; and a fourth metal ground plane 54. The fourth metal ground plane, the third metal ground plane, and the matching circuit are respectively disposed on the dielectric substrate on the side opposite to the first metal ground plane. The fourth metal ground plane is electrically connected to the third metal ground plane through the matching circuit. The matching circuit includes multiple inductors and multiple capacitors. The matching circuit is configured to compensate for the resonant frequency shift by adjusting the inductance value of the inductors and the capacitance value of the capacitors.

[0042] Furthermore, the matching module 5 also includes: a fifth metal ground 55, which is disposed on the other side of the dielectric substrate, one end of the fifth metal ground is connected to at least one of the third metal ground and the fourth metal ground, and the other end of the fifth metal ground is connected to the second metal ground.

[0043] Furthermore, the matching circuit 52 can be Type matching circuit, such as Figure 2 As shown, The matching circuit includes a first matching circuit 521, a second matching circuit 522, and a third matching circuit 523. Each of these three matching circuits consists of at least one inductor and at least one capacitor. The inductor and capacitor values ​​in each matching circuit can be different. By adjusting the inductor and capacitor values ​​of these three matching circuits, impedance matching can be achieved between the characteristic impedance of the coaxial cable and the input impedance of the antenna, ensuring that all the energy transmitted through the coaxial cable is fed into the antenna, thus maximizing the antenna's radiation efficiency. The matching circuit consists of a first matching circuit, then a third matching circuit, which are electrically connected to the metal ground plane via solder pads. Specifically, the first part 531 of the third metal ground plane is electrically connected to the second part 532 of the third metal ground plane via a second matching circuit 522. The first part 531 of the third metal ground plane is electrically connected to the first part 541 of the fourth metal ground plane via a first matching circuit 521. The first part 541 of the fourth metal ground plane is electrically connected to the second part 542 of the fourth metal ground plane via a third matching circuit 523. One side of the fifth metal ground plane 55 can be connected to both the second part 532 of the third metal ground plane and the second part 542 of the fourth metal ground plane, or it can be connected to only the second part 532 of the third metal ground plane or the second part 542 of the fourth metal ground plane. The other side of the fifth metal ground plane 55 is connected to the second metal ground plane. By connecting the metal ground planes on the matching module to the second metal ground plane through the fifth metal ground plane, a larger area of ​​metal ground plane can be formed, which is beneficial to improving the radiation performance of the antenna. Furthermore, the first matching circuit 521 is electrically connected to the power supply unit via the first portion 541 of the fourth metal ground plane; more specifically, the first matching circuit 521 is electrically connected to the power supply point 61 in the power supply unit via the first portion 541 of the fourth metal ground plane. Further, The package size of the type matching circuit is 0402.

[0044] Furthermore, the inductance and capacitance values ​​in the matching circuit can be adjusted according to the actual installation environment of the antenna to adjust the offset frequency. In practical applications, a mapping table of inductance and capacitance values ​​in the matching circuit for different installation environments of the antenna can be established in advance. Based on the inductance and capacitance values ​​in the mapping table, the matching circuit can be adjusted to quickly achieve frequency modulation, shorten the calibration time, and eliminate the need to adjust the radiator, thereby realizing the modular setting of the antenna and improving development efficiency.

[0045] According to the embodiments of this application, tuning accuracy can be improved by using the inductors and capacitors in the matching circuit. The matching circuit is connected to the third metal ground plane and the fourth metal ground plane respectively, which is beneficial to use the matching circuit to perform impedance matching between the input impedance of the antenna and the characteristic impedance of the coaxial line, thereby improving the radiation efficiency.

[0046] Furthermore, the second metal floor can form a larger ground plane by connecting to at least one of the third and fourth metal floors through the fifth metal floor, which is beneficial to improving tuning efficiency.

[0047] Figure 3 A schematic diagram of the power supply section structure according to an embodiment of this application is shown.

[0048] In some embodiments, the dual-ground coupled antenna further includes: a feed section 6, one end of which is connected to a fourth metal ground plane and the other end of which is connected to a first radiating stub; the feed section is configured to feed excitation to the radiator.

[0049] like Figure 3 As shown, the feed section includes a feed point 61 and a matching stub 62. The feed point is located on the matching module and on the same side as the matching circuit. The feed point is electrically connected to the matching circuit through a fourth metal ground plane. The excitation is fed from the feed point and fed into the radiator through the matching stub. The matching stub is configured to compensate for the impedance mismatch between the radiator and the feed point using its own impedance characteristics. Furthermore, the dual-grounded coupled antenna also includes a coaxial line 7, which includes a center conductor connected to a third metal ground plane and an outer conductor connected to a second metal ground plane. The center conductor feeds the excitation into the feed point through the third metal ground plane and the matching circuit.

[0050] According to an embodiment of this application, one end of the antenna feed section is connected to a fourth metal ground plane connected to a matching circuit, and the other end is connected to a first radiating stub. Tuning can be performed by adjusting the inductance and capacitance values ​​of the matching circuit. Furthermore, the excitation is sequentially fed into the feed section through a third metal ground plane, a matching circuit, and a fourth metal ground plane to power the antenna, thereby exciting it to resonance.

[0051] Figure 4 A schematic diagram illustrating the structural dimensions of a dual-grounded coupled antenna according to an embodiment of this application is shown.

[0052] In some embodiments, the distance between the first metal ground plane and the second metal ground plane matches one-tenth of the wavelength of the first resonant frequency. For example... Figure 4 As shown, the distance H between the first and second metal ground planes is approximately one-tenth of the wavelength of the first resonant frequency, thereby improving the coupling performance and RF stability between the first and second metal ground planes. The ratio of the length G of the first metal ground plane to the length G1 of the second metal ground plane is approximately one-third of the wavelength of the first resonant frequency. The radiating stub corresponding to length L1 is configured to excite the first resonant, the radiating stub corresponding to length L2 is configured to excite the second resonant, and the radiating stub corresponding to length L3 is configured to excite the third resonant. The sum of L1 and L2 equals L, and L is approximately one-quarter of the wavelength of the first resonant frequency.

[0053] Furthermore, the resonant frequency of the antenna is inversely proportional to the dielectric constant of the surrounding environment. To enhance the bandwidth performance of the antenna in a space-constrained device, a material with a dielectric constant of 3.8 is used as the material for the antenna clearance area.

[0054] According to an embodiment of this application, the distance H between the first metal ground and the second metal ground is approximately one-tenth of the wavelength of the first resonant frequency, which can improve radio frequency stability.

[0055] Figure 5 A schematic diagram of a dual-grounded coupled antenna in a hinged cover plate according to an embodiment of this application is shown.

[0056] In some embodiments, the first metal floor and the second metal floor each include at least one through hole;

[0057] The via is configured to fix the dual grounded coupled antenna in the target device, wherein the position of the via is determined according to the target device.

[0058] like Figure 5 As shown, the dual grounding coupled antenna can be installed inside the hinge cover 9. Through holes are set according to the environment inside the hinge cover. Screws 8 are screwed into the corresponding positions inside the hinge cover through the through holes to fix the dual grounding coupled antenna. The hinge cover 9 is located between the C-side cover 10 (C Cover) and the B-side cover (B Cover) of the laptop.

[0059] Furthermore, due to its modular nature, the dual-ground coupling antenna can be flexibly installed in a variety of devices, not just limited to laptops. The dual-ground coupling antenna can be reused, improving utilization, and is particularly suitable for installation in devices with high-density component distribution, such as ultra-thin terminal devices, all-metal laptops, and embedded wireless devices. While ensuring antenna performance, it can also improve the space utilization of the device.

[0060] Furthermore, by setting vias on the first and second metal ground planes, the antenna can be quickly installed in the corresponding position, thereby improving system integration efficiency and maintenance convenience. For example, by setting 3 to 5 vias on the first and second metal ground planes, frequency modulation can be achieved by adjusting the inductance and capacitance values ​​of the matching circuit. Even if there is a dimensional deviation of ±15mm in the first and second metal ground planes during manufacturing, the return loss of the antenna can still be less than -10dB, exhibiting good radiation performance.

[0061] In addition, the center conductor of the coaxial cable can be connected to the feed point of the flexible printed circuit antenna, while the outer conductor remains connected to the second metal ground plane, thereby improving the antenna's radiation efficiency.

[0062] According to embodiments of this application, antennas can be quickly attached to various devices via vias, enabling rapid deployment across devices and improving antenna adaptability and installation flexibility.

[0063] In some embodiments, the dual-ground-coupled antenna can be quickly attached to the device through a via, simplifying the assembly process. Combined with test interfaces and calibration tools, it can comprehensively improve test efficiency and the traceability of test data. The modularity of the dual-ground-coupled antenna can avoid developing multiple antennas when facing different device environments. Only the dual-ground-coupled antenna is needed to achieve the required performance, which significantly reduces costs. The use of matching circuits for resonant frequency adjustment further improves the modularity of the antenna, allowing it to maintain good radiation performance even when installed in different devices. The joint design of the first metal ground plane, the second metal ground plane, and the matching module can effectively suppress electromagnetic interference in the surrounding environment of the antenna (e.g., resonant frequency shift caused by structural materials in the surrounding environment, electromagnetic interference caused by electromagnetic waves leaked from components in the surrounding environment, etc.), significantly improving the RF performance and stability of the antenna in multiple frequency bands.

[0064] Figure 6 The gain test results of a dual-ground-coupled antenna according to an embodiment of this application are illustrated schematically.

[0065] like Figure 6 As shown, compared to conventional antennas, the gain values ​​of dual-ground coupled antennas in the frequency bands corresponding to 802.11b / g / n (i.e., IEEE 802.11b, IEEE 802.11g, and IEEE 802.11n standards), WiFi 6 (i.e., 802.11a / ac / ax), and WiFi 6E (i.e., 802.11ac / ax) are all greater than the gain values ​​of conventional antennas in these frequency bands, and are far greater than the desired gain specifications. Here, 802.11a / ac / ax refers to the IEEE 802.11a, IEEE 802.11ac, and IEEE 802.11ax standards, and 802.11ac / ax refers to the IEEE 802.11ac and IEEE 802.11ax standards.

[0066] Figure 7 The return loss test results of a dual-grounded coupled antenna according to an embodiment of this application are illustrated schematically.

[0067] like Figure 7 As shown, the return loss of the dual-grounded coupled antenna is less than -10dB in the 2.4GHz, 5GHz and 6GHz bands, indicating that the antenna has good radiation performance.

[0068] This application also provides an electronic device, which includes the dual grounded coupled antenna 100 of the embodiments of this application.

[0069] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] Those skilled in the art will understand that the features described in the various embodiments of this application can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this application. In particular, the features described in the various embodiments of this application can be combined and / or combined in various ways without departing from the spirit and teachings of this application. All such combinations and / or combinations fall within the scope of this application.

Claims

1. A dual-grounded coupled antenna, characterized in that, include: First metal floor; Second metal floor; as well as A radiator; wherein the radiator is disposed between the first metal floor and the second metal floor, the radiator includes a first radiating branch and a second radiating branch connected to each other, the first radiating branch is spaced apart from the first metal floor by a first distance, the first radiating branch is spaced apart from the second metal floor by a second distance, one end of the second radiating branch is connected to the first metal floor, and the other end of the second radiating branch is connected to the second metal floor; The first metal ground plane and the second metal ground plane are respectively configured to shield electromagnetic interference from the vicinity of the dual grounded coupled antenna.

2. The dual-grounded coupled antenna according to claim 1, characterized in that, The radiator is configured to excite a first resonance, a second resonance, and a third resonance, wherein the frequency of the first resonance is 2.4 GHz, the frequency of the second resonance is 5 GHz, and the frequency of the third resonance is 6 GHz.

3. The dual-grounded coupling antenna according to claim 2, characterized in that, The distance between the first metal floor and the second metal floor matches one-tenth of the wavelength of the first resonant frequency.

4. The dual-grounded coupled antenna according to claim 1, characterized in that, The first metal floor and the second metal floor each include at least one through hole; The via is configured to fix the dual grounding coupled antenna in the target device, wherein the position of the via is determined according to the target device.

5. The dual-grounded coupling antenna according to claim 4, characterized in that, The dual-grounded coupling antenna further includes: A matching module is disposed on the second metal floor and is opposite to the first metal floor, wherein the length of the second metal floor is less than the length of the first metal floor; The matching module is configured to compensate for the resonant frequency shift caused by changes in the position of the via.

6. The dual-grounded coupling antenna according to claim 5, characterized in that, The matching module includes: Dielectric substrate; Matching circuit; The third metal floor; and A fourth metal ground plane, the third metal ground plane, and the matching circuit are respectively disposed on the dielectric substrate on the side opposite to the first metal ground plane; The fourth metal floor is electrically connected to the third metal floor through the matching circuit, wherein the matching circuit includes multiple inductors and multiple capacitors; The matching circuit is configured to compensate for the resonant frequency shift by adjusting the inductance value of the inductor and the capacitance value of the capacitor.

7. The dual-grounded coupling antenna according to claim 6, characterized in that, The matching module further includes: A fifth metal ground plane is disposed on the other side of the dielectric substrate. One end of the fifth metal ground plane is connected to at least one of the third metal ground plane and the fourth metal ground plane, and the other end of the fifth metal ground plane is connected to the second metal ground plane.

8. The dual-grounded coupling antenna according to claim 6, characterized in that, The dual-grounded coupling antenna further includes: A power supply unit, one end of which is connected to the fourth metal floor, and the other end of which is connected to the first radiating branch; The feed unit is configured to feed excitation into the radiator.

9. The dual-grounded coupling antenna according to claim 6, characterized in that, The dual-grounded coupling antenna further includes: Coaxial cable, the coaxial cable comprising: A central conductor, the central conductor being connected to the third metal ground; and An outer conductor, which is connected to the second metal ground plane.

10. An electronic device, characterized in that, The electronic device includes the dual grounded coupled antenna as described in any one of claims 1-9.

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