Electronic device
By setting parasitic stubs in foldable electronic devices and grounding them at a first preset distance from the feed point, the initial phase of the antenna is changed, the radiation intensity is enhanced, the problem of insufficient antenna performance is solved, and a lightweight design and efficient communication are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XIAOMI MOBILE SOFTWARE CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-31
AI Technical Summary
In the folded state of foldable electronic devices, the antenna's radiation performance is poor. Existing technical solutions cannot effectively improve the antenna performance in the folded state, and the parasitic branches are long and occupy a lot of space, conflicting with the requirements of lightweight and thin design.
By setting a first preset distance between the antenna body and the parasitic stub, the parasitic stub is grounded close to the feed point, changing the initial phase of the antenna, enhancing the radiation intensity along the first direction, and reducing the radiation intensity along the second direction. Flexible FPC antennas and laser engraving are used to set wiring segments on the mid-frame support to reduce space occupation.
It improves the radiation intensity along the first direction when the electronic device is folded, enhances the communication experience, reduces space occupation, enables a thinner and lighter design, avoids interference from camera devices, and enhances antenna efficiency.
Smart Images
Figure CN224583438U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of communication technology, and more particularly to an electronic device. Background Technology
[0002] With the gradual development of electronic device technology, foldable electronic devices are becoming increasingly popular. Currently, in foldable electronic devices, the antenna radiation performance is poor when the device is folded. Utility Model Content
[0003] To overcome the problems existing in the related technologies, this disclosure provides an electronic device.
[0004] According to a first aspect of the present disclosure, an electronic device is provided, comprising:
[0005] The antenna body is configured as a low-frequency antenna, and the antenna body includes a feed point;
[0006] The parasitic branch has a first preset distance from the feed point, and the end of the parasitic branch away from the feed point is grounded;
[0007] The parasitic stub receives electromagnetic radiation from the feed point and is electromagnetically coupled to the antenna body to enhance the radiation intensity of the antenna body in a first direction and reduce the radiation intensity of the antenna body in a second direction, so that the radiation intensity in the first direction is greater than the radiation intensity in the second direction, wherein the first direction is perpendicular to the second direction.
[0008] In this embodiment of the disclosure, the electronic device grounds the antenna body through a parasitic stub. Since there is a first preset distance between the parasitic stub and the feed point, the grounding position is set close to the feed point position, which causes the initial phase of the antenna to shift, thereby increasing the radiation intensity of the antenna body in the first direction and thus improving the radiation performance of the antenna body.
[0009] In one possible implementation, the parasitic branch comprises a metal segment.
[0010] In this embodiment, the metal segment enables a conductive connection between the antenna body and the grounding point, thereby grounding the antenna body.
[0011] In one possible implementation, the metal segment includes an FPC antenna.
[0012] In this embodiment, the metal segment uses an FPC antenna, which occupies a small volume, is highly flexible, and is easy to install, thus facilitating a lightweight and thin design.
[0013] In one possible implementation, the metal segment includes a wiring segment that is laser-engraved on the support of the mid-frame of the electronic device.
[0014] In this embodiment of the disclosure, by setting wiring segments on the bracket of the electronic device for electrical connection, the space occupation can be further reduced, and a thinner and lighter design can be achieved.
[0015] In one possible implementation, the length of the parasitic branch is less than or equal to 5 mm.
[0016] In this embodiment, compared to the prior art, the length of the parasitic branch is significantly reduced, thus reducing space occupation and layout pressure.
[0017] In one possible implementation, the first preset distance is less than or equal to 2 mm.
[0018] In this embodiment of the disclosure, the first preset distance is less than or equal to 2mm to meet the performance requirements of the low-frequency antenna and improve the radiation effect.
[0019] In one possible implementation, the antenna body includes a first stub and a second stub, the first stub extending along a first direction and the second stub extending along a second direction, the first stub being connected to the second stub, and the feed point being located at one end of the first stub near the second stub.
[0020] In this embodiment of the disclosure, the first stub and the second stub constitute the antenna body to jointly radiate signals in the desired frequency band.
[0021] In one possible implementation, the mid-frame of the electronic device includes a bottom edge and a side edge connected to the bottom edge, the bottom edge being provided with a USB interface and a second branch, and a gap being provided between the second branch and the USB interface.
[0022] In this embodiment, the USB interface and the gap are located on the bottom edge of the electronic device's frame so that the folded antenna body and the USB interface face upwards, thereby enhancing the antenna's radiation performance in the vertical direction.
[0023] In one possible implementation, the electronic device has a folded state and an unfolded state;
[0024] When the electronic device is in the deployed state, the antenna body and the parasitic branch of the electronic device are located at the bottom of the electronic device;
[0025] When the electronic device is in the folded state, the bottom and top of the electronic device are stacked.
[0026] In this embodiment of the disclosure, when the electronic device is in a folded state, the bottom and top of the electronic device are stacked, thereby enhancing the radiation intensity of the antenna body along the first direction in the folded state and improving the communication experience of the electronic device in the folded state.
[0027] In one possible implementation, the electronic device further includes a camera device disposed on the top of the electronic device;
[0028] When the electronic device is in a folded state, the camera device and the parasitic branch are offset from each other in the width direction of the electronic device.
[0029] In this embodiment, the electronic device includes a camera mounted on its top. Because the camera and the parasitic branch are offset in the width direction of the electronic device, interference from the camera to the parasitic branch is avoided, which is beneficial for improving antenna efficiency. Furthermore, the camera's placement exposes the top and bottom of the electronic device when held in a folded state, allowing the antenna body and the parasitic branch to face upwards or tilt upwards. This improves the radiation efficiency and intensity of the folded electronic device in the upward direction (towards the sky), thus enhancing the antenna's communication performance.
[0030] In one possible implementation, the electronic device includes a circuit board, with one end of the parasitic stalk away from the feed point connected to a ground location on the circuit board.
[0031] In this embodiment of the disclosure, the parasitic branch is grounded through the circuit board of the electronic device to achieve grounding of the antenna body.
[0032] 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 disclosure. Attached Figure Description
[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0034] Figure 1 This is a structural diagram of the mid-frame of an electronic device in related technologies.
[0035] Figure 2 This is a schematic diagram of the radiation direction of an antenna in related technologies.
[0036] Figure 3 This is a schematic diagram of the mid-frame structure of an electronic device according to an exemplary embodiment.
[0037] Figure 4 This is a schematic diagram illustrating the radiation direction of an antenna according to an exemplary embodiment. Detailed Implementation
[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.
[0039] With the gradual development of electronic device technology, foldable electronic devices are becoming increasingly popular. Currently, in foldable electronic devices, the antenna radiation performance is relatively poor when the device is folded.
[0040] In related technologies, parasitic stubs are used to ground the antenna in order to improve its performance, such as... Figures 1-2 As shown, a gap 14' is provided between the antenna body 10' and the USB interface 15' on the mid-frame of the electronic device. The USB interface 15' is grounded, and the USB interface 15' is connected to the antenna body 10' through a parasitic stub 20' to achieve grounding of the antenna body 10'. However, in order to meet the performance improvement requirements of low-frequency antennas, the length of the parasitic stub 20' is usually relatively long, occupying a large area, increasing the layout pressure of the internal space of the electronic device, which conflicts with the design trend of thinner and smaller electronic devices. Furthermore, this technical solution can only improve the antenna performance in the unfolded state, but cannot optimize the antenna performance in the folded state. Figure 2 As shown, the antenna's radiation intensity is weak in the vertical direction, resulting in a poor communication experience for users.
[0041] To address the aforementioned technical problems, this disclosure proposes an electronic device. The antenna body of the electronic device is grounded via a parasitic stub. Because the parasitic stub has a first preset distance from the feed point, the grounding position is positioned close to the feed point, causing an initial phase shift in the antenna and increasing the radiation intensity of the antenna body in the first direction, thereby improving the user's communication experience.
[0042] According to an exemplary embodiment, such as Figures 3-4 As shown, this disclosure provides an electronic device. The electronic device includes an antenna body 10 and a parasitic stub 20. The antenna body 10 includes a feed point 13 for feeding the antenna body 10. The parasitic stub 20 has a first preset distance from the feed point 13, and the end of the parasitic stub 20 away from the feed point 13 is grounded, thereby grounding the antenna body 10 through the parasitic stub 20. The parasitic stub 20 receives electromagnetic radiation from the feed point 13 and is electromagnetically coupled to the antenna body 10 to enhance the radiation intensity of the antenna body 10 in a first direction and reduce the radiation intensity of the antenna body 10 in a second direction, so that the radiation intensity in the first direction is greater than the radiation intensity in the second direction.
[0043] The first direction is perpendicular to the second direction. Figures 3-4 Taking the directions shown as an example, the first direction is Figures 3-4 The vertical direction in the image refers to the up-down direction as most users hold electronic devices. The second direction is... Figures 3-4 The horizontal direction shown is the left-right direction as most users hold the electronic device. In real-life scenarios, since signal base stations are usually located at high altitudes, communication signals are mostly transmitted from high places. The electronic device in this embodiment can be a foldable electronic device, which can be folded up and down via a pivot in the middle. Considering the usage habits and holding postures of most users, for ease of gripping, users usually adopt a holding posture with the camera device at the top, that is, the antenna body 10 is usually facing upwards (i.e., the antenna body and parasitic branches are facing upwards or tilted upwards). Therefore, in this embodiment, it is beneficial to improve the radiation intensity of the antenna body 10 in the first direction in the folded state, that is, the radiation efficiency and radiation intensity in the upward direction, i.e., towards the sky, which is beneficial to improve the efficiency of the antenna in the top direction, thereby improving communication quality and enhancing the user experience.
[0044] Of course, it is understood that the embodiments of this disclosure do not impose excessive restrictions on the specific directions of the first and second directions. Different users may have different habits in holding electronic devices, and the first and second directions may change. Depending on the specific application scenario, the first and second directions may also change. For example, when the electronic device in the embodiments of this disclosure is a mobile phone, the first direction is the length direction of the mobile phone, and the second direction is the width direction of the mobile phone; when the electronic device in the embodiments of this disclosure is a tablet computer, the first direction is the width direction of the tablet computer, and the second direction is the length direction of the tablet computer.
[0045] In addition, the antenna body 10 is configured as a low-frequency antenna. Since the frequency of the low-frequency antenna is low, when adopting the technical solution in the related technology, the length of the parasitic stub 20' needs to be set to at least 30mm. Otherwise, it will not significantly improve the low-frequency performance of the antenna. If the length of the parasitic stub 20' is too long, it will occupy more space, increase the layout pressure of the internal space of the electronic device, and is not conducive to achieving the design requirements of miniaturization and compactness.
[0046] In this embodiment, the parasitic stub 20 and the feed point 13 have a first preset distance. The parasitic stub 20 grounds the antenna body 10 near the feed point 13, causing a shift in the initial phase of the antenna body 10, thereby changing the directivity of the radiated signal of the antenna body 10. For example... Figure 2The diagram shown illustrates the radiation direction of an antenna in related technologies. The area circled by the dashed line represents the antenna's radiation range. It can be seen that the second direction (i.e.,...) Figure 2 The radiation intensity in the horizontal direction shown is greater than that in the first direction (i.e., Figure 2 The radiation intensity (in the vertical direction shown). In this embodiment of the disclosure, as... Figure 4 The diagram shown is a schematic representation of the antenna's radiation direction in an embodiment of this disclosure. The area circled by the dashed line represents the antenna's radiation range. It can be seen that the first direction (i.e., Figure 4 The radiation intensity in the vertical direction shown is greater than that in the second direction (i.e., the radiation intensity in the vertical direction shown). Figure 4 The radiation intensity (in the horizontal direction shown) is more conducive to receiving communication signals from the top, improving communication quality and user experience. Meanwhile, since the antenna body 10 is directly grounded from near the feed point 13 without passing through other antenna stubs, the parasitic stub 20 has a more significant effect on improving the low-frequency performance of the antenna. Therefore, the length of the parasitic stub 20 does not need to be excessively long, greatly reducing space occupation and improving the internal space utilization of electronic devices, thus enabling miniaturized design.
[0047] In some embodiments, the parasitic branch 20 includes a metal segment. The metal segment enables a conductive connection between the antenna body 10 and the grounding point, thereby grounding the antenna body 10. The embodiments of this disclosure do not impose excessive restrictions on the specific shape and material of the metal segment, as long as the corresponding electrical connection effect can be achieved.
[0048] In one example, the metal segment includes an FPC (Flexible Printed Circuit) antenna. FPC antennas are lightweight, thin, and flexible, enabling the formation of small, flexible circuits with good heat dissipation and easy installation in narrow and limited spaces. Therefore, they are widely used in various electronic products that pursue a thin and light design.
[0049] In one example, the metal segment includes wiring segments on a bracket (not shown in the figure) on the mid-frame of the electronic device, which are laser-engraved. The bracket can be made of non-conductive materials such as plastic or resin. Circuit patterns are formed on the bracket using methods such as laser engraving and etching, and a conductive layer of metal or alloy material is deposited within the circuit patterns through methods such as deposition, electroplating, or spraying, thereby forming a conductive circuit. Grounding is achieved through wiring segments on the bracket of the electronic device's mid-frame, eliminating the need for additional wiring or circuit boards, which helps to further reduce space occupation and achieve a thinner and lighter design.
[0050] In some embodiments, the length of the parasitic stub 20 is less than or equal to 5 mm. Compared to related technologies where a parasitic stub 20' needs to be at least 30 mm to achieve a good performance improvement, the parasitic stub 20 in this embodiment only needs to be no more than 5 mm to effectively improve antenna performance, significantly reducing space occupation and alleviating the layout pressure inside the electronic device.
[0051] In some embodiments, the first preset distance is less than or equal to 2 mm. The first preset distance is the distance between the parasitic stub 20 and the feed point 13. Generally, the smaller the distance between the parasitic stub 20 and the feed point 13, the lower the antenna frequency; the larger the distance between the parasitic stub 20 and the feed point 13, the higher the antenna frequency. Since the antenna body 10 in the technical solution of this embodiment is a low-frequency antenna, the parasitic stub 20 needs to be set close to the feed point 13, and the first preset distance between the parasitic stub 20 and the feed point 13 is less than or equal to 2 mm. However, in higher frequency application scenarios, those skilled in the art can also adjust the size of the first preset distance appropriately according to actual needs. This embodiment does not impose too many restrictions on this.
[0052] In some embodiments, the antenna body 10 includes a first stub 11 and a second stub 12. For example... Figures 3-4 As shown, the first branch 11 is along the first direction (i.e. Figure 3 The second branch 12 extends along the second direction (i.e., the vertical direction shown in the diagram), and the second branch 12 extends along the second direction (i.e., the vertical direction shown in the diagram). Figure 3 (as shown in the horizontal direction). The first stub 11 is connected to the second stub 12, and the first stub 11 and the second stub 12 together form an "L"-shaped antenna body 10. The feed point 13 is located at the end of the first stub 11 near the second stub 12.
[0053] In some embodiments, the electronic device also has a USB port 15 and a gap 14 on its mid-frame. For example... Figure 3 As shown, the mid-frame of the electronic device includes a bottom edge 31 and a side edge 32, with the side edge 32 connected to the bottom edge 31. The bottom edge 31 is provided with a USB interface 15 and a second branch 12. A gap 14 is provided between the second branch 12 and the USB interface 15, and the USB interface 15 is grounded.
[0054] In some embodiments, a switch 16 is also provided on the mid-frame of the electronic device. For example... Figure 3 As shown, switch 16 is connected to the first stub 11, and switch 16 is located on the side of feed point 13 away from the second stub 12. Switch 16 can be used to turn 10 on or off, or it can be connected to a tuning circuit or other stubs to switch the antenna's signal frequency. This embodiment does not impose excessive limitations on this, and those skilled in the art can make selections according to actual needs.
[0055] In one example, the electronic device is a foldable electronic device. The electronic device has a folded state and an unfolded state, and a first branch 11 is located on the side 32 of the electronic device's mid-frame. Figure 3 Taking the orientation shown as an example, when the electronic device is in the unfolded state, the second branch 12, the slit 14, and the USB interface 15 are located on the bottom edge 31 of the middle frame of the electronic device, with the opening of the USB interface 15 facing downwards. When the electronic device is in the unfolded state, the lower part of the electronic device is folded upwards and stacked with the upper part. The bottom edge 31 of the middle frame of the electronic device is located at the top after being folded. When the user uses the folded electronic device, the opening of the USB interface 15 is usually facing upwards. Therefore, by using the parasitic branch 20 to enhance the radiation intensity of the antenna body 10 in the vertical direction, it is beneficial to improve the radiation efficiency of the antenna in the direction towards the top, thereby improving the user's communication experience.
[0056] In some embodiments, the electronic device has a folded state and an unfolded state.
[0057] When the electronic device is in the unfolded state, the antenna body 10 and parasitic branch 20 are located at the bottom of the electronic device; when the electronic device is in the folded state, the bottom and top of the electronic device are stacked. When the user uses the folded electronic device, the antenna body 10 and parasitic branch 20 are usually located at the top of the electronic device, thus improving the antenna performance in the top direction of the electronic device and enhancing the user experience.
[0058] In this embodiment, the parasitic stub 20 grounds the antenna body 10 near the feed point 13, causing an initial phase shift in the antenna body 10. This alters the directivity of the radiated signal, resulting in a greater radiation intensity in the first direction than in the second direction. This improves the reception of communication signals from the top, enhancing communication quality and user experience. Furthermore, the significantly reduced length of the parasitic stub 20 reduces space occupancy, improving internal space utilization and enabling miniaturized design.
[0059] In some embodiments, the electronic device further includes a camera (not shown). The camera is positioned on the top of the electronic device, conforming to the usage habits of most users when holding the electronic device. When the electronic device is folded, the camera and the parasitic branch 20 are positioned in the width direction of the electronic device (i.e., Figures 3-4 The horizontal direction shown is staggered to avoid the camera device interfering with the parasitic branch 20 and affecting the antenna efficiency.
[0060] In this embodiment, the electronic device includes a camera mounted on its top. Since the camera and the parasitic branch 20 are offset in the width direction of the electronic device, interference from the camera to the parasitic branch 20 can be avoided, which is beneficial for improving antenna efficiency. Furthermore, the camera's position exposes the top and bottom of the electronic device when the user holds it in a folded state, allowing the antenna body 10 and the parasitic branch 20 to face upwards or tilt upwards. This improves the radiation efficiency and intensity of the electronic device in its folded state, i.e., towards the sky, thereby enhancing the antenna's communication performance.
[0061] In some embodiments, the electronic device includes a circuit board (not shown), and one end of the parasitic branch 20 away from the feed point 13 is connected to a grounding location on the circuit board. The circuit board can be the mainboard of the electronic device or a web plate that implements the function of a certain module. This disclosure does not impose excessive limitations on this, as long as a grounding connection can be achieved.
[0062] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.
[0063] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.
Claims
1. An electronic device, comprising: include: The antenna body is configured as a low-frequency antenna, and the antenna body includes a feed point; The parasitic branch has a first preset distance from the feed point, and the end of the parasitic branch away from the feed point is grounded; The parasitic stub receives electromagnetic radiation from the feed point and is electromagnetically coupled to the antenna body to enhance the radiation intensity of the antenna body in a first direction and reduce the radiation intensity of the antenna body in a second direction, so that the radiation intensity in the first direction is greater than the radiation intensity in the second direction, wherein the first direction is perpendicular to the second direction.
2. The electronic device of claim 1, wherein, The parasitic segment includes a metal segment.
3. The electronic device of claim 2, wherein, The metal segment includes an FPC antenna.
4. The electronic device of claim 2, wherein, The metal segment includes a wiring segment that is laser-engraved on the bracket of the mid-frame of the electronic device.
5. The electronic device of any one of claims 1 to 4, wherein, The length of the parasitic branch is less than or equal to 5 mm.
6. The electronic device of any one of claims 1 to 4, wherein, The first preset distance is less than or equal to 2mm.
7. The electronic device of any one of claims 1 to 4, wherein, The antenna body includes a first stub and a second stub. The first stub extends along the first direction, and the second stub extends along the second direction. The first stub and the second stub are connected. The feed point is located at the end of the first stub closer to the second stub.
8. The electronic device of claim 7, wherein, The electronic device's mid-frame includes a bottom edge and a side edge connected to the bottom edge. The bottom edge is provided with a USB interface and a second branch, and a gap is provided between the second branch and the USB interface.
9. The electronic device of any one of claims 1 to 4, wherein, The electronic device has a folded state and an unfolded state; When the electronic device is in the deployed state, the antenna body and the parasitic branch are located at the bottom of the electronic device; When the electronic device is in the folded state, the bottom and top of the electronic device are stacked.
10. The electronic device of claim 9, wherein, The electronic device also includes a camera device, which is disposed on the top of the electronic device; When the electronic device is in a folded state, the camera device and the parasitic branch are offset from each other in the width direction of the electronic device.
11. The electronic device of any one of claims 1 to 4, wherein, The electronic device includes a circuit board, with one end of the parasitic branch away from the feed point connected to the grounding location of the circuit board.