Antenna structure and electronic device

Abstract

The application provides an antenna structure and an electronic device. The antenna structure comprises a metal middle frame, the metal middle frame comprises a first frame radiator and a metal ground plate, the first frame radiator is located at the periphery of the metal ground plate, and a clearance is formed between the first frame radiator and the metal ground plate. The metal ground plate comprises a carrier plate and a metal bump connected to the carrier plate, the metal bump protrudes towards the clearance and faces the first frame radiator, and the metal bump and the first frame radiator are coupled to form a tuning capacitor. The antenna structure of the application uses the clearance between the first frame radiator and the metal ground plate to layout the metal bump, and forms a coupling capacitor by the metal bump and the first frame radiator. Without increasing the additional layout requirement of the electronic device, the circuit board space configured with the antenna structure can be released, more flexibility is provided for the layout of other elements, and the space utilization of the electronic device is significantly improved.

Description

Technical Field

[0001] This application relates to the field of antennas, and more particularly to an antenna structure and electronic device. Background Technology

[0002] Most current mobile phone antennas use the frame as a radiating branch, while the components used for debugging are almost all located on the PCB board of the mobile phone. This design leads to less and less available space on the PCB board, which in turn requires the PCB board to be enlarged, resulting in increased costs. Utility Model Content

[0003] This application provides an antenna structure and an electronic device to address some or all of the shortcomings in the related art.

[0004] The antenna structure provided in this application includes a metal frame, which includes a first frame radiator and a metal ground plane. The first frame radiator is located around the metal ground plane and forms a clearance between it and the metal ground plane. The metal ground plane includes a carrier plate and a metal protrusion connected to the carrier plate. The metal protrusion faces the first frame radiator, protrudes into the clearance, and faces the first frame radiator. The metal protrusion is coupled to the first frame radiator to form a tuning capacitor.

[0005] Optionally, the metal frame further includes a second frame radiator, the second frame radiator forming a first gap with the first frame radiator, and the first gap communicating with the clearance.

[0006] When the second frame radiator is in operation, the first frame radiator is a parasitic branch of the first frame radiator, and the tuning capacitor is used to adjust the parasitic resonant frequency of the first frame radiator.

[0007] Optionally, it also includes a third frame radiator, wherein the second frame radiator is bent along the corner of the metal floor, wherein one end of the second frame radiator cooperates with the first frame radiator to form the first gap, and the other end cooperates with the third frame radiator to form the second gap.

[0008] The third frame radiator is spaced apart from the metal floor. When the second frame radiator is in operation, the third frame radiator acts as a parasitic branch of the second frame radiator.

[0009] Optionally, the third frame radiator is a USB crossbeam.

[0010] Optionally, the second frame radiator includes a first upper frame point, and the antenna structure further includes a feed, which is electrically connected to the first upper frame point and excites the second frame radiator to radiate B28 band signals.

[0011] Optionally, it also includes plate-end capacitors, which are electrically connected to the second frame radiator and the third frame radiator, respectively.

[0012] Optionally, the second frame radiator includes a first upper frame point, and the antenna structure further includes a feed, which is electrically connected to the first upper frame point and excites the second frame radiator to radiate B8 band signals.

[0013] Optionally, the shortest distance between the metal bump and the first frame radiator is greater than or equal to 0.5 mm and less than or equal to 1.2 mm.

[0014] Optionally, in the height direction of the metal frame, the length of the metal protrusion is greater than or equal to 7 mm and less than or equal to 11 mm.

[0015] The electronic device of this application includes the antenna structure as described above.

[0016] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0017] As can be seen from the above embodiments, this application reuses the clearance between the first frame radiator and the metal ground plane to arrange the metal bumps. The metal bumps and the first frame radiator form a coupling capacitor. Without increasing the additional layout requirements of the electronic device, the circuit board space for configuring the antenna structure can be freed up, providing more flexibility for the layout of other components and significantly improving the space utilization of the electronic device.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment;

[0021] Figure 2 This is a cross-sectional view of an electronic device according to an exemplary embodiment;

[0022] Figure 3 This is a graph showing the radiation efficiency of the first frame radiator under various conditions according to an exemplary embodiment;

[0023] Figure 4 This is a graph illustrating the radiation efficiency of a second frame radiator under various conditions according to an exemplary embodiment. Detailed Implementation

[0024] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0025] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0026] This application provides an electronic device, including an antenna structure 1.

[0027] The electronic device of this application, through the design of antenna structure 1, can significantly improve the reception and transmission performance of antenna signals, anti-interference capability, space utilization, and multi-band compatibility, and solves the problems of excessive PCB board space utilization leading to increased costs in existing electronic devices.

[0028] Figure 1 This is a schematic diagram illustrating the structure of an electronic device according to an exemplary embodiment, such as... Figure 1 As shown, the antenna structure 1 of this application includes a metal frame 11, which includes a first frame radiator 111 and a metal ground plane 110. The first frame radiator 111 is located around the metal ground plane 110 and forms a clearance 114 between it and the metal ground plane 110. The metal ground plane 110 includes a carrier plate and a metal protrusion 115 connected to the carrier plate. The metal protrusion 115 protrudes into the clearance 114 facing the first frame radiator 111 and faces the first frame radiator 111. The metal protrusion 115 and the first frame radiator 111 are coupled to form a tuning capacitor.

[0029] The antenna structure 1 of this application reuses the clearance 114 between the first frame radiator 111 and the metal ground plane 110 to arrange the metal bumps 115. The metal bumps 115 and the first frame radiator 111 form a coupling capacitor. Without increasing the additional layout requirements of the electronic device, the circuit board space for configuring the antenna structure 1 can be freed up, providing more flexibility for the layout of other components and significantly improving the space utilization of the electronic device.

[0030] In an optional embodiment, the metal frame 11 further includes a second frame radiator 112, with a first gap 116 formed between the second frame radiator 112 and the first frame radiator 111, and the first gap 116 communicating with the clearance 114. When the second frame radiator 112 is in operation, the first frame radiator 111 is a parasitic branch of the first frame radiator 111, and the tuning capacitor formed by the coupling between the metal bump 115 and the first frame radiator 111 is used to adjust the parasitic resonant frequency of the first frame radiator 111.

[0031] Continue to refer to Figure 1 This application designs a second frame radiator 112 that forms a first gap 116 with the first frame radiator 111, thus creating a multi-radiator antenna structure 1. When the second frame radiator 112 is in operation, the first frame radiator 111, as its parasitic branch, can enhance the radiation efficiency of the second frame radiator 112, thereby improving the overall radiation efficiency and multi-band compatibility of the antenna structure 1 and increasing the antenna signal coverage.

[0032] In an optional embodiment, the second frame radiator 112 includes a first upper frame point, and the antenna structure 1 further includes a feed 12, which is electrically connected to the first upper frame point and excites the second frame radiator 112 to radiate B8 band signals.

[0033] The electronic device of this application is designed with a feed 12 electrically connected to the first upper frame point of the second frame radiator 112, which can excite the second frame radiator 112 to radiate B8 band signals. This design ensures the radiation performance and stability of the antenna. Meanwhile, as described above, when the second frame radiator 112 is in operation, the first frame radiator 111 is a parasitic branch of the first frame radiator 111, and the metal bump 115 is coupled to the first frame radiator 111 to form a tuning capacitor, thereby further optimizing the coupling effect, tuning performance, and radiation efficiency of the second frame radiator 112. This design can achieve higher antenna performance gain and better improve signal radiation efficiency and coverage.

[0034] It should be noted that, such as Figure 1As shown, in an optional embodiment, the second frame radiator 112 further includes a second upper frame point, and the antenna structure 1 further includes a tuning circuit 14 electrically connected to the second upper frame point.

[0035] The tuning circuit 14 in this application is designed to precisely adjust the resonant frequency of the antenna structure 1. This design enables the electronic device to achieve better impedance matching and radiation performance in different frequency bands, significantly improving the antenna's communication efficiency and radiation performance. Furthermore, through the adjustment of the tuning circuit 14, the electronic device can dynamically adapt to different communication needs, such as frequency band switching or signal strength changes, ensuring stable communication performance in various application scenarios.

[0036] Figure 2 This is a cross-sectional view of an electronic device according to an exemplary embodiment, in conjunction with... Figure 2 In an optional embodiment, the shortest distance A between the metal bump 115 and the first frame radiator 111 is greater than or equal to 0.5 mm and less than or equal to 1.2 mm.

[0037] The antenna structure 1 of this application achieves better capacitive coupling by limiting the shortest distance A between the metal bump 115 and the first frame radiator 111 to a range of 0.5 mm to 1.2 mm. Furthermore, by changing the specific value of the shortest distance A, the capacitance value coupled between the metal bump 115 and the first frame radiator 111 is controlled to match the antenna signal of either the first frame radiator 111 or the second frame radiator 112. Therefore, this design can further optimize the antenna's resonant frequency and impedance matching performance through capacitive coupling, thereby improving the antenna's radiation efficiency.

[0038] The shortest distance A can be designed to be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, or 1.2mm. As shown in Table 1, taking 0.6mm and 1.0mm as examples, the electronic device of this application can generate out-of-band fluctuations near the B8 frequency band through the electromagnetic parasitic effect of the metal bump 115, thereby improving the efficiency of the B8 frequency band antenna. To be precise, when the shortest distance A is designed to be 0.6mm, the radiation performance of the B8TX band can be improved by 0.7dB, and the radiation performance of the B8RX band can be improved by 0.2dB. It can be seen that this application can better ensure the radiation performance of the electronic device in a specific frequency band by precisely controlling the distance between the metal bump 115 and the first frame radiator 111, thereby obtaining greater performance gains. Therefore, this application does not impose any limitations on this.

[0039] Optionally, in the height direction of the metal frame 11, the length B of the metal protrusion 115 is greater than or equal to 7 mm and less than or equal to 11 mm.

[0040] Similarly, the antenna structure 1 of this application achieves better capacitive coupling by limiting the length B of the metal bump 115 in the height direction Z of the metal frame 11 to a range of 7mm to 11mm. This design can further optimize the resonant frequency and impedance matching performance of the antenna, and improve the radiation efficiency of the antenna.

[0041] The length B of the metal bump 115 in the height direction Z of the metal frame 11 can be designed to be 7mm, 8mm, 9mm, 10mm, or 11mm. As shown in Table 1, the embodiment described in this application takes 9mm as an example. By designing the length B of the metal bump 115, the electronic device of this application significantly improves the dynamic tuning performance and space utilization of the antenna, and also simplifies the antenna manufacturing process and reduces production costs.

[0042] Figure 3 According to an exemplary embodiment, radiation efficiency curves of the first frame radiator 111 under various embodiments are shown. Table 1 is a table showing the radiation efficiency values ​​of the second frame radiator 112 under various embodiments. Figure 1 The green lines in the table correspond to Embodiment 1 in Table 1, the red lines correspond to Embodiment 2, and the brown bars correspond to the existing design. Taking the second frame radiator 112 radiating the B8 frequency band as an example, combined with Table 1 and... Figure 3 As shown, the electronic device of this application, through the design of the metal bump 115, couples the metal bump 115 with the first frame radiator 111 to form a tuning capacitor, which can adjust the out-of-band resonance generated by the first frame radiator 111 in the B8 frequency band. Thus, the out-of-band resonance in the B8 frequency band can help improve the radiation efficiency of the second frame radiator 112 in the B8 frequency band.

[0043] Referring to Table 1, when the shortest distance A between the metal bump 115 and the first frame radiator 111 is designed to be 0.6 mm, and the length B of the metal bump 115 is designed to be 9 mm, the corresponding... Figure 1 As shown by the green lines, the second frame radiator 112, compared to the existing design, achieves a radiation efficiency improvement of approximately 0.7 dB in the B8TX band and approximately 0.2 dB in the B8RX band. When the shortest distance A between the metal bump 115 and the first frame radiator 111 is designed to be 1.0 mm, and the length B of the metal bump 115 is designed to be 9 mm, the corresponding... Figure 1 As shown by the red lines, the radiation efficiency of the second frame radiator 112 in the B8TX band is improved by approximately 0.3 dB compared to existing designs. This demonstrates that by adjusting the structure of the metal bump 115, the out-of-band resonance generated by the first frame radiator 111 in the B8 band can be adjusted, thereby assisting the second frame radiator 112 in improving its radiation efficiency.

[0044]

[0045] Table 1

[0046] In an optional embodiment, a third frame radiator 113 is further included. The second frame radiator 112 is bent at the corner of the metal floor 110. One end of the second frame radiator 112 cooperates with the first frame radiator 111 to form a first gap 116, and the other end cooperates with the third frame radiator 113 to form a second gap 117. The third frame radiator 113 is spaced apart from the metal floor 110. When the second frame radiator 112 is in the working state, the third frame radiator 113 acts as a parasitic branch of the second frame radiator 112.

[0047] This application designs the second frame radiator 112 to bend along the corner of the metal floor 110, and designs a third frame radiator 113 at the end of the second frame radiator 112 away from the first frame radiator 111, forming a second gap 117 with the second frame radiator 112, thereby further constituting a multi-radiator antenna structure 1. In this way, when the second frame radiator 112 is in the working state, both the first frame radiator 111 and the third frame radiator 113 can serve as its parasitic branches, thereby further enhancing the radiation efficiency of the second frame radiator 112, improving the overall radiation efficiency and multi-band compatibility of the antenna structure 1, and increasing the antenna signal coverage range.

[0048] In an optional embodiment, the third frame radiator 113 is a USB crossbeam.

[0049] refer to Figure 1 As shown, the electronic device of this application utilizes the existing USB crossbeam as the third frame radiator 113, and uses it as a parasitic branch when the second frame radiator 112 is in the working state. This design not only improves the radiation efficiency and performance of the second frame radiator 112, but also further utilizes the existing space and structure, thereby ensuring the space utilization rate of the antenna structure 1 to a greater extent, freeing up the mounting space of the carrier board, and thus meeting the design requirements of the electronic device such as being thin, light, and compact.

[0050] In an optional embodiment, the feed 12 excites the second frame radiator 112 to radiate a B28 band signal.

[0051] The electronic device of this application can also excite the second frame radiator 112 to radiate B28 band signals via the feed 12. This design further enhances the multi-band compatibility of the antenna structure 1. Furthermore, when the second frame radiator 112 radiates B28 band signals, the USB crossbeam can act as a parasitic branch of the second frame radiator 112, effectively improving the radiation performance and stability of the second frame radiator 112, achieving higher antenna performance gain, and better improving signal radiation efficiency and coverage.

[0052] Of course, it should be noted that in other optional embodiments, the frequency band excited by the power supply 12 can be adjusted accordingly based on the actual working scenario and usage requirements. For example, in other embodiments, it can also be designed to excite the second frame radiator 112 to radiate mid-to-high frequency band signals or other low frequency band signals. Therefore, this application does not impose any limitations on this.

[0053] In an optional embodiment, the antenna structure 1 further includes a plate-end capacitor 13, which is electrically connected to the second frame radiator 112 and the third frame radiator 113, respectively.

[0054] The electronic device of this application has a board-end capacitor 13 connected in series between the second frame radiator 112 and the third frame radiator 113. The setting of the board-end capacitor 13 can adjust the input impedance of the antenna to better match the operating frequency. Furthermore, by designing an appropriate capacitor value, signal reflection can be reduced, antenna efficiency can be improved, and the operating bandwidth of the main radiating antenna can be extended, thereby enabling the main radiating antenna to work effectively over a wider frequency range.

[0055] Figure 4 This is a resonant efficiency curve diagram generated by the third frame radiator 113 according to an exemplary embodiment. The dashed line in the diagram represents the radiation efficiency of the B28 band signal of the second frame radiator 112 when the third frame radiator 113 is not used as a parasitic branch, while the solid line represents the radiation efficiency of the B28 band signal of the second frame radiator 112 when the third frame radiator 113 is used as a parasitic branch. (Reference) Figure 4 When the second frame radiator 112 radiates the antenna signal, the electroparasitic effect generated by the third frame radiator 113 can improve the radiation performance of the B28TX band signal by about 1 dB. It is evident that the electronic device of this application cleverly utilizes existing structures to improve the radiation performance of the main radiating branch, while also meeting the current design requirements for thinner and lighter electronic devices.

[0056] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An antenna structure, characterized in that, include: A metal frame, comprising a first frame radiator and a metal floor, wherein the first frame radiator is located around the metal floor and forms a clearance between the first frame radiator and the metal floor; The metal floor includes a carrier plate and a metal protrusion connected to the carrier plate. The metal protrusion protrudes into the clearance and faces the first frame radiator. The metal protrusion is coupled with the first frame radiator to form a tuning capacitor.

2. The antenna structure according to claim 1, characterized in that, The metal frame also includes a second frame radiator, a first gap is formed between the second frame radiator and the first frame radiator, and the first gap is connected to the clearance. When the second frame radiator is in operation, the first frame radiator is a parasitic branch of the first frame radiator, and the tuning capacitor is used to adjust the parasitic resonant frequency of the first frame radiator.

3. The antenna structure according to claim 2, characterized in that, It also includes a third frame radiator, and the second frame radiator bends along the corner of the metal floor, wherein one end of the second frame radiator cooperates with the first frame radiator to form the first gap, and the other end cooperates with the third frame radiator to form the second gap. The third frame radiator is spaced apart from the metal floor. When the second frame radiator is in operation, the third frame radiator acts as a parasitic branch of the second frame radiator.

4. The antenna structure according to claim 3, characterized in that, The third frame radiator is a USB crossbeam.

5. The antenna structure according to claim 3, characterized in that, The second frame radiator includes a first upper frame point, and the antenna structure also includes a feed, which is electrically connected to the first upper frame point and excites the second frame radiator to radiate B28 band signals.

6. The antenna structure according to claim 5, characterized in that, It also includes plate-end capacitors, which are electrically connected to the second frame radiator and the third frame radiator, respectively.

7. The antenna structure according to claim 2, characterized in that, The second frame radiator includes a first upper frame point, and the antenna structure also includes a feed, which is electrically connected to the first upper frame point and excites the second frame radiator to radiate B8 band signals.

8. The antenna structure according to claim 7, characterized in that, The shortest distance between the metal bump and the first frame radiator is greater than or equal to 0.5 mm and less than or equal to 1.2 mm.

9. The antenna structure according to claim 7, characterized in that, In the height direction of the metal frame, the length of the metal protrusion is greater than or equal to 7 mm and less than or equal to 11 mm.

10. An electronic device, characterized in that, The antenna structure includes any one of claims 1 to 9.

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