Antenna structure and foldable electronic device
By designing specific antenna structures and frequency adjustments in foldable electronic devices, the performance degradation problem of antennas in the folded state was solved, achieving radiation performance and frequency coverage in the folded state that are superior to those in the unfolded state.
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
- 2026-07-28
AI Technical Summary
When foldable electronic devices switch between folded and unfolded states, antenna performance is affected, especially when the two main antennas on both sides are close to each other, resulting in a performance degradation.
Design an antenna structure in which the first and second radiators are located on one side of the device and spaced apart in the unfolded state, and partially overlap in the folded state, and the performance loss is reduced by adjusting the resonant frequency; the third and fourth radiators and the coupled radiator are arranged to improve their respective radiation performance by adjusting the frequency difference.
In the folded state, the antenna performance is improved, even better than in the unfolded state, reducing the performance loss caused by folding switching and enriching the coverage frequency bands.
Smart Images
Figure CN224570396U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of terminal technology, and in particular to an antenna structure and a foldable electronic device. Background Technology
[0002] For foldable electronic devices, the switching between folded and unfolded states causes the antennas on both sides of the main body to move closer to each other and interfere with each other when the device is folded, which can easily lead to a decrease in antenna performance. Utility Model Content
[0003] This disclosure provides an antenna structure and a folding design to address the shortcomings of related technologies.
[0004] According to a first aspect of the present disclosure, an antenna structure is provided for use in a foldable electronic device, the antenna structure comprising:
[0005] First radiator;
[0006] The second radiator, both the first radiator and the second radiator are low-frequency antennas or medium-to-high-frequency antennas;
[0007] When the foldable electronic device is in the unfolded state, the first radiator and the second radiator are located on the first side of the foldable electronic device and their projections are spaced apart. When the foldable electronic device is in the folded state, the projections of the first radiator and the second radiator partially overlap, and the difference in the resonant frequencies of the first radiator and the second radiator is less than or equal to 100MHz.
[0008] Optionally, the difference in resonant frequencies between the first radiator and the second radiator is approximately 50 MHz.
[0009] Optionally, a third radiator is also included, which is located on the first side of the foldable electronic device and on the same side of the hinge of the foldable electronic device as the first radiator.
[0010] When the foldable electronic device is in a folded state, the projection of the third radiator is spaced apart from the projection of the second radiator, and the frequency of the target radiation band of the third radiator is greater than the frequency of the target radiation band of the second radiator.
[0011] Optional, also includes:
[0012] A fourth radiator is located on the second side of the foldable electronic device;
[0013] A coupling radiator is located on the fourth side of the foldable electronic device. When the foldable electronic device is in the unfolded state, the second side and the fourth side are arranged opposite to each other. When the foldable electronic device is in the folded state, the projections of the second side and the fourth side coincide.
[0014] In the folded state, the difference in resonant frequencies between the fourth radiator and the coupled radiator is less than or equal to 100 MHz.
[0015] Optionally, in the folded state, the difference in resonant frequencies between the fourth radiator and the coupled radiator is approximately 50 MHz.
[0016] Optionally, the coupled radiator is spaced apart from the metal floor.
[0017] Optionally, one of the first radiator and the second radiator is a main antenna and the other is a diversity antenna;
[0018] The antenna structure also includes a tuning circuit electrically connected to the diversity antenna. When the foldable electronic device switches to the folded state, the tuning circuit switches the resonant frequency of the diversity antenna so that the difference between the resonant frequencies of the main antenna and the diversity antenna is less than or equal to 100MHz.
[0019] Optional, also includes:
[0020] Fifth radiator;
[0021] A sixth radiator, wherein the target radiation frequency of the sixth radiator is greater than the target radiation frequency of the fifth radiator, and both the sixth and fifth radiators are located on the fifth side of the foldable electronic device, with the fifth side and the first side being arranged opposite to each other.
[0022] Specifically, when the foldable electronic device is in a folded state, the projections of the fifth radiator and the sixth radiator partially overlap, the preset resonance mode of the fifth radiator radiates the target radiation frequency band, and the difference between the higher-order mode resonance frequency of the preset resonance mode and the resonance frequency of the sixth radiator is less than or equal to 100MHz, and the higher-order mode resonance frequency is greater than the resonance frequency of the sixth radiator.
[0023] Optionally, the fifth radiator is used to radiate low-frequency band signals, and the sixth radiator is used to radiate mid-to-high frequency band signals and / or 5G band signals.
[0024] According to a second aspect of the present disclosure, a foldable electronic device is provided, including an antenna structure as described in any of the foregoing embodiments, wherein the first radiator and the second radiator are respectively partial segments of the foldable electronic device.
[0025] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:
[0026] As can be seen from the above embodiments, this disclosure improves the radiation performance of the other by adjusting the resonant frequency of the first radiator and the second radiator, reduces the performance loss caused by the switching of the foldable electronic device to the folded state, and even shows better antenna performance in the folded state than in the unfolded state.
[0027] 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
[0028] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.
[0029] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment.
[0030] Figure 2 This is a comparison chart showing the peak radiation performance of the first radiator when the foldable electronic device is in a folded state, and the peak radiation performance in related technical solutions.
[0031] Figure 3 This is a schematic diagram of another antenna structure according to an exemplary embodiment.
[0032] Figure 4 This is a comparison chart showing the peak radiation performance of the fourth radiator when the folded electronic device is in a folded state, and the peak radiation performance of the radiator without a coupled radiator in related technical solutions.
[0033] Figure 5 This is a schematic diagram of another antenna structure according to an exemplary embodiment. Detailed Implementation
[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates 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 disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.
[0035] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.
[0036] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0037] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment. The antenna structure is applied to a foldable electronic device. The antenna structure may include a first radiator 1 and a second radiator 2, wherein both the first radiator 1 and the second radiator 2 are low-frequency antennas or mid-to-high-frequency antennas. For example, both the first radiator 1 and the second radiator 2 are used to radiate low-frequency band signals, such as the B5 band, B8 band, and B28 band. The low-frequency band signals radiated by the first radiator 1 and the second radiator 2 may be the same or different. Alternatively, both the first radiator 1 and the second radiator 2 are used to radiate mid-to-high-frequency band signals, such as the B1 band, B3 band, B40 band, and B41 band. The mid-to-high-frequency band signals radiated by the first radiator 1 and the second radiator 2 may be the same or different.
[0038] In the unfolded state of the foldable electronic device, both the first radiator 1 and the second radiator 2 are located on the first side of the device, with their projections spaced apart. This results in a relatively large distance between them, minimizing the impact on their performance. When the device is in the folded state, the projections of the first radiator 1 and the second radiator 2 partially overlap, and the difference in their resonant frequencies is less than or equal to 100MHz. This allows for the adjustment of the resonant frequency of the other radiator when the performance of one of the first or second radiators degrades, thereby improving the radiation performance of the degraded radiator.
[0039] For example, taking the first radiator 1 as the main antenna and the second radiator 2 as the diversity antenna, this antenna structure also includes a tuning circuit (not shown) electrically connected to the diversity antenna. When the foldable electronic device switches to the folded state, the tuning circuit switches the resonant frequency of the diversity antenna so that the difference between the resonant frequencies of the main antenna and the diversity antenna is less than or equal to 100MHz. In this way, the radiation performance of the main antenna can be improved by adjusting the resonant frequency of the diversity antenna, reducing the performance loss caused by the foldable electronic device switching to the folded state.
[0040] In some embodiments, the difference in resonant frequencies between the first radiator 1 and the second radiator 2 is approximately 50 MHz. For example... Figure 2 As shown, with the second radiator 2 as the main antenna, and both the first radiator 1 and the second radiator 2 being low-frequency antennas, and the second radiator 2 covering the B5, B8, and B28 frequency bands, Figure 2 This is a comparison chart showing the peak radiation performance of the first radiator 1 and the peak radiation performance in related technical solutions when the resonant frequencies of the first radiator 1 and the second radiator 2 differ by 50MHz in the folded state of the foldable electronic device. Figure 2 It can be seen that the radiation performance of the technical solution of this application is superior to that of the related technical solutions in the B5, B8 and B28 frequency bands.
[0041] In some embodiments, still with Figure 1 As shown, the antenna structure also includes a third radiator 3, which is located on the first side of the foldable electronic device and on the same side of the foldable electronic device's hinge as the first radiator 1. In other words, the first radiator 1 and the third radiator 3 are located on the same main body of the foldable electronic device. Figure 1 As shown, the first radiator 1 and the third radiator 3 cooperate to form a gap. In other embodiments, other branches may also be provided between the first radiator 1 and the third radiator 3, and this disclosure does not limit this.
[0042] Furthermore, when the foldable electronic device is in a folded state, the projection of the third radiator 3 is spaced apart from the projection of the second radiator 2, and the frequency of the target radiation band of the third radiator 3 is greater than the frequency of the target radiation band of the second radiator 2. This reduces the negative impact of the second radiator 2 on the radiation performance of the third radiator 3 in the folded state, and the arrangement of the third radiator 3 enriches the coverage frequency band of the antenna structure.
[0043] In the above embodiments, such as Figure 3As shown, the antenna structure also includes a fourth radiator 4 and a coupling radiator 5. The fourth radiator 4 is located on the second side of the foldable electronic device, and the coupling radiator 5 is located on the fourth side of the foldable electronic device. When the foldable electronic device is in the unfolded state, the second and fourth sides are positioned opposite each other, with the first side located between the second and fourth sides. When the foldable electronic device is in the folded state, the projections of the second and fourth sides coincide. Furthermore, in the folded state, the difference in resonant frequencies between the fourth radiator 4 and the coupling radiator 5 is less than or equal to 100MHz. In other words, the coupling radiator 5 can be used as a parasitic stub of the fourth radiator 4. By adjusting the difference in resonant frequencies between the fourth radiator 4 and the coupling radiator 5, the performance of the fourth radiator 4 can be improved, thereby compensating for the performance loss of the third radiator 3 caused by the second radiator 2. This is beneficial for maintaining or even surpassing the radiation performance of the antenna structure in the unfolded state when in the folded state. In order to better achieve the parasitic effect, the coupling radiator 5 is spaced apart from the metal ground plane, that is, the coupling radiator 5 is used as a suspended stub.
[0044] In some embodiments, the difference in resonant frequencies between the fourth radiator 4 and the coupled radiator 5 is approximately 50 MHz. Figure 4 As shown, the fourth radiator 4 is used as a mid-to-high frequency antenna, for example, covering the B1, B3, B40, B41, and N78 frequency bands. Figure 4 This is a comparison chart showing the peak radiation performance of the fourth radiator 4 when the resonant frequencies of the fourth radiator 4 and the coupled radiator 5 differ by 50MHz in a folded electronic device, and the peak radiation performance in a related technical solution without the coupled radiator 5. Figure 4 It can be seen that the radiation performance of the fourth radiator 4 in the present application is superior to that of the prior art in the B1, B3, B40, B41 and N78 frequency bands.
[0045] In the above embodiments, such as Figure 5 As shown, the antenna structure also includes a fifth radiator 6 and a sixth radiator 7. The target radiation frequency of the sixth radiator 7 is higher than that of the fifth radiator 6. For example, the sixth radiator 7 can be used to radiate mid-to-high frequency signals, while the fifth radiator 6 can be used to radiate low-frequency signals; or, the sixth radiator 7 can be used to radiate 5G signals, while the fifth radiator 6 can be used to radiate low-frequency signals. Of course, in some embodiments, the sixth radiator 7 can cover both mid-to-high frequency signals and 5G signals.
[0046] In this design, both the sixth radiator 7 and the fifth radiator 6 are located on the fifth side of the foldable electronic device, and this fifth side is positioned opposite to the first side. When the foldable electronic device is in a folded state, the projections of the fifth radiator 6 and the sixth radiator 7 partially overlap. The preset resonant mode of the fifth radiator 6 radiates the target frequency band. The difference between the higher-order mode resonant frequency of this preset resonant mode and the resonant frequency of the sixth radiator 7 is less than or equal to 100MHz, and the higher-order mode resonant frequency is greater than the resonant frequency of the sixth radiator 7. Based on this, the radiation performance of the sixth radiator 7 can be improved by using the higher-order mode of the fifth radiator 6, compensating for the performance loss caused by the sixth radiator 7 switching to a folded state.
[0047] It should be noted that, in Figure 1 , Figure 3 and Figure 5 In the embodiments shown, the first radiator 1, the second radiator 2, the third radiator 3, the fourth radiator 4, the fifth radiator 6, and the sixth radiator 7 are connected to the corresponding metal floor via metal ribs for illustration. In other embodiments, any one or more of the first radiator 1, the second radiator 2, the third radiator 3, the fourth radiator 4, the fifth radiator 6, and the sixth radiator 7 may also be arranged at intervals with the metal floor. This disclosure does not impose any restrictions on this.
[0048] Based on the technical solution of this disclosure, an electronic device is also provided, which includes the antenna structure described in any of the foregoing embodiments, wherein the first radiator 1, the second radiator 2, the third radiator 3, the fourth radiator 4, the coupling radiator 5, the fifth radiator 6, and the sixth radiator 7 are respectively partial metal frame segments of a foldable device. The foldable electronic device can be a vertically folding model or a horizontally folding model.
[0049] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure 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 this disclosure are indicated by the following claims.
[0050] It should be understood that this disclosure is not limited to the precise structures 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 disclosure is limited only by the appended claims.
Claims
1. An antenna structure, characterized in that, The antenna structure, used in foldable electronic devices, includes: First radiator; The second radiator, both the first radiator and the second radiator are low-frequency antennas or medium-to-high-frequency antennas; When the foldable electronic device is in the unfolded state, the first radiator and the second radiator are located on the first side of the foldable electronic device and their projections are spaced apart. When the foldable electronic device is in the folded state, the projections of the first radiator and the second radiator partially overlap, and the difference in the resonant frequencies of the first radiator and the second radiator is less than or equal to 100MHz.
2. The antenna structure according to claim 1, characterized in that, The difference in resonant frequency between the first radiator and the second radiator is approximately 50 MHz.
3. The antenna structure according to claim 1, characterized in that, It also includes a third radiator, which is located on the first side of the foldable electronic device and on the same side of the hinge of the foldable electronic device as the first radiator; When the foldable electronic device is in a folded state, the projection of the third radiator is spaced apart from the projection of the second radiator, and the frequency of the target radiation band of the third radiator is greater than the frequency of the target radiation band of the second radiator.
4. The antenna structure according to claim 1, characterized in that, Also includes: A fourth radiator is located on the second side of the foldable electronic device; A coupling radiator is located on the fourth side of the foldable electronic device. When the foldable electronic device is in the unfolded state, the second side and the fourth side are arranged opposite to each other. When the foldable electronic device is in the folded state, the projections of the second side and the fourth side coincide. In the folded state, the difference in resonant frequencies between the fourth radiator and the coupled radiator is less than or equal to 100 MHz.
5. The antenna structure according to claim 4, characterized in that, In the folded state, the difference in resonant frequencies between the fourth radiator and the coupled radiator is approximately 50 MHz.
6. The antenna structure according to claim 4, characterized in that, The coupled radiator is spaced apart from the metal floor.
7. The antenna structure according to claim 1, characterized in that, One of the first radiator and the second radiator is a main antenna and the other is a diversity antenna; The antenna structure also includes a tuning circuit electrically connected to the diversity antenna. When the foldable electronic device switches to the folded state, the tuning circuit switches the resonant frequency of the diversity antenna so that the difference between the resonant frequencies of the main antenna and the diversity antenna is less than or equal to 100MHz.
8. The antenna structure according to claim 1, characterized in that, Also includes: Fifth radiator; A sixth radiator, wherein the target radiation frequency of the sixth radiator is greater than the target radiation frequency of the fifth radiator, and both the sixth and fifth radiators are located on the fifth side of the foldable electronic device, with the fifth side and the first side being arranged opposite to each other. Specifically, when the foldable electronic device is in a folded state, the projections of the fifth radiator and the sixth radiator partially overlap, the preset resonance mode of the fifth radiator radiates the target radiation frequency band, and the difference between the higher-order mode resonance frequency of the preset resonance mode and the resonance frequency of the sixth radiator is less than or equal to 100MHz, and the higher-order mode resonance frequency is greater than the resonance frequency of the sixth radiator.
9. The antenna structure according to claim 8, characterized in that, The fifth radiator is used to radiate low-frequency band signals, and the sixth radiator is used to radiate mid-to-high frequency band signals and / or 5G band signals.
10. A foldable electronic device, characterized in that, The antenna structure includes any one of claims 1-9, wherein the first radiator and the second radiator are respectively partial segments of the foldable electronic device.