Antenna structure and folding electronic equipment

Abstract

The invention relates to an antenna structure and folding electronic equipment. The antenna structure comprises a first middle frame, wherein the first middle frame comprises a first frame radiator; the second middle frame and the first middle frame are arranged in a relative rotation mode, and the second middle frame comprises a second frame radiator; wherein when the first middle frame and the second middle frame are switched to a tiled state, the relative rotation axis of the first middle frame and the second middle frame is located between the first frame radiator and the second frame radiator, and when the first middle frame and the second middle frame are switched to a folded state, the relative rotation axis of the first middle frame and the second middle frame is located between the first frame radiator and the second frame radiator. A matching circuit electrically connected with the second frame radiator is switched to a first state, so that the first frame radiator forms first resonance and second resonance, and the difference between the frequency point frequencies of the first resonance and the second resonance is within a preset threshold range.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of terminals, and in particular, to an antenna structure and a foldable electronic device. BACKGROUND

[0002] Based on the important position of low-frequency antennas in communication systems, currently, a foldable electronic device can usually be configured with multiple low-frequency frame antennas, which can be distributed on the middle frames on both sides. However, in the folded state, the ground plane area is reduced due to the facing of the middle frames on both sides, and the bandwidth of the original low-frequency antenna is affected due to the ground plane mode. SUMMARY

[0003] The present disclosure provides an antenna structure and a foldable electronic device to solve the deficiencies in the related art.

[0004] According to a first aspect of an embodiment of the present disclosure, an antenna structure is provided, comprising:

[0005] a first middle frame, the first middle frame comprising a first frame radiator;

[0006] a second middle frame, the second middle frame being arranged in opposition to the first middle frame, the second middle frame comprising a second frame radiator; wherein when the first middle frame and the second middle frame are switched to a flat state, an axis of relative rotation between the first middle frame and the second middle frame is located between the first frame radiator and the second frame radiator, and when the first middle frame and the second middle frame are switched to a folded state, a matching circuit electrically connected to the second frame radiator is switched to a first state, so that the first frame radiator forms a first resonance and a second resonance, and a difference between frequency points of the first resonance and the second resonance is within a preset threshold range.

[0007] Optionally, the first frame radiator comprises a first end and a second end, the first end being configured to form a first break, and the second end being configured to form a second break;

[0008] the second frame radiator comprises a third end and a fourth end, the third end being configured to form a third break, and the fourth end being configured to form a fourth break;

[0009] when the first middle frame and the second middle frame are switched to the folded state, the first break and the third break are arranged symmetrically, and the second break and the fourth break are arranged symmetrically.

[0010] Optionally, the difference between the frequency points of the first resonance and the second resonance is greater than or equal to 10 MHz and less than or equal to 50 MHz.

[0011] Optionally, the first side frame radiator forms the first resonance when the first middle frame and the second middle frame are in the flat state.

[0012] The frequency point frequency of the second resonance is greater than the frequency point frequency of the first resonance.

[0013] Optionally, the first resonance covers the B5 frequency band and / or the B8 frequency band.

[0014] Optionally, when the first middle frame and the second middle frame switch to the flat state, the matching circuit switches to the second state, the first side frame radiator covers at least one low frequency band, and the second side frame radiator covers at least one low frequency band.

[0015] Optionally, when the first middle frame and the second middle frame are in the flat state or the folded state, the first side frame radiator and the second side frame radiator cover at least one same low frequency band.

[0016] Optionally, the second side frame further comprises a third side frame radiator and a fourth side frame radiator.

[0017] When the first middle frame and the second middle frame are in the flat state or the folded state, the first side frame radiator, the second side frame radiator, the third side frame radiator and the fourth side frame radiator cover at least one same low frequency band.

[0018] Optionally, the first side frame radiator, the second side frame radiator, the third side frame radiator and the fourth side frame radiator all cover the B28 frequency band.

[0019] According to a second aspect of the embodiments of the present disclosure, a folding electronic device is provided, comprising the antenna structure according to any one of the above embodiments.

[0020] The technical solutions provided by the embodiments of the present disclosure can include the following beneficial effects:

[0021] As can be seen from the above embodiments, the double waves with a relatively short distance are formed on the first side frame radiator, thereby expanding the bandwidth of the first side frame radiator. Especially when the first side frame radiator is used as a main radiation antenna, the bandwidth of the main radiation antenna can be ensured, which is beneficial to the normal communication of the electronic device configured with the antenna structure.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure.

[0024] Figure 1 is a schematic diagram of an antenna structure in a folded state according to an example embodiment.

[0025] Figure 2 is a schematic diagram of an antenna structure in a folded state according to an example embodiment. Figure 1 is a side view of an antenna structure in a folded state.

[0026] Figure 3 is a return loss plot of a first bezel radiator according to an example embodiment.

[0027] Figure 4 is an efficiency plot of a first bezel radiator according to an example embodiment. DETAILED DESCRIPTION

[0028] The detailed description set forth below, in connection with the appended drawings, describes example embodiments and does not represent all embodiments consistent with the present disclosure. The following detailed description includes specific

[0029] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used in this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0030] It will be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a temporal or chronological order. Rather, these terms are used only to distinguish one from another. For example, a first information can be termed a second information, and similarly, a second information can also be termed a first information, without departing from the scope of the present disclosure. As used herein, the word "if' can be construed to mean "when" or "in response to determining" or "in response to a determination" depending on the context.

[0031] Figure 1 is a schematic diagram of an antenna structure in a folded state according to an example embodiment, Figure 2 is a schematic diagram of an antenna structure in a folded state according to an example embodiment. Figure 1 is a side view of an antenna structure in a folded state. AsFigure 1 and Figure 2 As shown in FIG. 1 and FIG. 2, the antenna structure includes a first middle frame 1 and a second middle frame 2, which are arranged to rotate relative to each other, such as the first middle frame 1 and the second middle frame 2 can be connected through a rotating shaft mechanism, to realize the switching between the folded state and the flat state of the first middle frame 1 and the second middle frame 2. The first middle frame 1 includes a first side frame radiator 11, and the second middle frame 2 includes a second side frame radiator 21. When the first middle frame 1 and the second middle frame 2 are switched to the flat state, the first side frame radiator 11 and the second side frame radiator 21 are located on the same side of the antenna structure, and the rotation axis between the first middle frame 1 and the second middle frame 2 is located between the first side frame radiator 11 and the second side frame radiator 21. When the first middle frame 1 and the second middle frame 2 are switched to the folded state, the matching circuit electrically connected with the second side frame radiator 21 is switched to the first state, and the first side frame radiator 11 is influenced by the second side frame radiator 21, so that the first side frame radiator 11 forms a first resonance and a second resonance, and the frequency difference between the first resonance and the second resonance is within a preset threshold range. Based on this, it is beneficial to form a double wave with a short distance on the first side frame radiator 11, thereby expanding the bandwidth of the first side frame radiator 11. Especially when the first side frame radiator 11 is used as a main radiation antenna, it can ensure the bandwidth of the main radiation antenna, and is beneficial to the normal communication of the electronic device configured with the antenna structure. For example, the frequency difference between the first resonance and the second resonance can be greater than or equal to 10 MHz and less than or equal to 50 MHz, so as to avoid that the expanded bandwidth is not enough due to the too small frequency difference, and at the same time avoid that the full coverage of the target frequency band cannot be displayed due to the too large frequency difference.

[0032] For example, the first side frame radiator 11 includes a first end 111 and a second end 112, the first end 111 can be used to form a first slit, and the second end 112 can be used to form a second slit; the second side frame radiator 21 includes a third end 211 and a fourth end 212, the third end 211 is used to form a third slit, and the fourth end 212 is used to form a fourth slit. When the first middle frame 1 and the second middle frame 2 are switched to the folded state, the first end 111 is aligned with the third end 211, and the second end 112 is aligned with the fourth end 212. That is Figure 2 As shown in FIG. 1 and FIG. 2, in the left-right direction, the first end 111 and the third end 211 are substantially at the same height, and the second end 112 and the fourth end 212 are substantially at the same height; the first slit and the third slit can be symmetrically arranged or arranged with different widths, and the second slit and the fourth slit can be symmetrically arranged or arranged with different widths. Based on this, Figure 2In the left-right direction, the projection of the first frame radiator 11 and the projection of the second frame radiator 21 substantially coincide, and the second frame radiator 21 can act as a parasitic branch of the first frame radiator 11 in some frequency bands. By switching the matching state of the second frame radiator 21, the resonance mode of the first frame radiator 11 can be adjusted to expand the bandwidth.

[0033] For example, taking the first frame radiator 11 and the second frame radiator 21 as low-frequency antennas, as shown in FIG. 6, under the influence of the second frame radiator 21, the first frame radiator 11 can form a double waveform in the B5 frequency band and the B8 frequency band, thereby expanding the bandwidth. Figure 3 In some embodiments, when the first middle frame 1 and the second middle frame 2 are in a flat state, the signal fed in through the feed can form a first resonance with the first frame radiator 11, and in the folded state, the signal fed in through the feed and the influence of the second frame radiator 21 can make the first frame radiator 11 form a first resonance and a second resonance, as shown in FIG. 7, see the blue arrow indication of the B5 frequency band curve and the B8 frequency band curve, the frequency point frequency of the second resonance is greater than that of the first resonance, so that the second frame radiator 21 can act as an electrical parasitic branch of the first frame radiator 11, thereby expanding the bandwidth. Figure 3

[0034] Moreover, as shown in FIG. 8, the Tot radiation efficiency of the B5 frequency band reaches about -13 dB, and the Tot radiation efficiency of the B8 frequency band reaches -8.4 dB, both have high radiation efficiency, which is conducive to ensuring that the first frame radiator 11 is in a high radiation efficiency state, meeting the communication demand in the folded state. In the foregoing embodiments, taking the first resonance covering the B5 frequency band and the B8 frequency band as an example, of course, in other embodiments, the first resonance covers the B5 frequency band or the B8 frequency band, or other low-frequency frequency bands, and the present disclosure does not limit this. Figure 4

[0035] ​​In each of the above embodiments, when switching to the flat state between the first middle frame 1 and the second middle frame 2, the matching circuit connected with the second side frame radiator 21 can be switched to the second state, the first side frame radiator 11 can cover at least one low frequency band, and the second side frame radiator 21 can cover at least one low frequency band, at this time, the first side frame radiator 11 and the second side frame radiator 21 can be used as independent low frequency antennas for radiation, meeting the communication requirements of the electronic device configured with the antenna structure. Further, when the first middle frame 1 and the second middle frame 2 are in the folded state or the flat state, the first side frame radiator 11 and the second side frame radiator 21 can cover at least one same low frequency band, such as in the flat state, the first side frame radiator 11 and the second side frame radiator 21 can cover B5 band, B8 band and B28 band, and in the folded state, the first side frame radiator 11 and the second side frame radiator 21 can cover B28 band.

[0036] Based on the technical solution of the present disclosure, in order to realize the scheme of multiple low frequency radiation, the second middle frame 2 can further include a third side frame radiator 22 and a fourth side frame radiator 23, when the first middle frame 1 and the second middle frame 2 are in the folded state or the flat state, the first side frame radiator 11, the second side frame radiator 21, the third side frame radiator 22 and the fourth side frame radiator 23 all cover at least one same low frequency band, such as the first side frame radiator 11, the second side frame radiator 21, the third side frame radiator 22 and the fourth side frame radiator 23 can all cover B28 band, forming 4RX of low frequency, improving communication quality, and realizing signal reception of four low frequency bands. The third side frame radiator 22 and the fourth side frame radiator 23 can be arranged at any frame segment of the second middle frame 2, such as the second middle frame 2 can further include a connector mounting groove, which can be arranged between the third side frame radiator 22 and the fourth side frame radiator 23, that is, the third side frame radiator 22 and the fourth side frame radiator 23 can be arranged at the bottom of the antenna structure.

[0037] Based on the technical solution of the present disclosure, a folding electronic device is also provided, which includes the antenna structure described in any one of the preceding embodiments, and the first side frame radiator 11 and the second side frame radiator 21 can form part of the outer frame of the folding electronic device, respectively. The electronic device can be provided with a feed connected with the first side frame radiator 11 and a feed connected with the second side frame radiator 21, as well as related tuning circuits, which will not be described one by one here.

[0038] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the disclosure be construed as including any patents, patent applications, publications, publications, or other disclosure of the prior art that are referred to by their title or by a general identification of their content. It is intended that the disclosure encompass variations and modifications of the specific structure disclosed herein to the extent that these variations and modifications remain consistent with the general principles of the present disclosure. The specification and examples are to be regarded as exemplary in nature and not as restrictive.

[0039] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings and that various modifications and changes can be made therein without departing from the scope thereof. The scope of the present disclosure is indicated by the appended claims.

Claims

1. An antenna structure, characterized by The antenna structure comprises: a first middle frame comprising a first edge frame radiator; a second middle frame arranged in relative rotation with the first middle frame, the second middle frame comprising a second edge frame radiator; wherein when the first middle frame and the second middle frame are switched to a flat state, an axis of relative rotation of the first middle frame and the second middle frame is located between the first edge frame radiator and the second edge frame radiator, and when the first middle frame and the second middle frame are switched to a fold state, a matching circuit electrically connected with the second edge frame radiator is switched to a first state, so that the first edge frame radiator forms a first resonance and a second resonance, and a frequency difference between frequency points of the first resonance and the second resonance is within a preset threshold range.

2. The antenna structure of claim 1, wherein, The first edge frame radiator comprises a first end and a second end; and the second edge frame radiator comprises a third end and a fourth end. When the first middle frame and the second middle frame are switched to the fold state, the first end is aligned with the third end, and the second end is aligned with the fourth end.

3. The antenna structure of claim 1, wherein, The frequency difference between the frequency points of the first resonance and the second resonance is greater than or equal to 10 MHz and less than or equal to 50 MHz.

4. The antenna structure of claim 1, wherein, When the first middle frame and the second middle frame are in the flat state, the first edge frame radiator forms the first resonance. The frequency point of the second resonance is greater than the frequency point of the first resonance.

5. The antenna structure of claim 4, wherein, The first resonance covers a B5 frequency band and / or a B8 frequency band.

6. The antenna structure of claim 1, wherein, When the first middle frame and the second middle frame are switched to the flat state, the matching circuit is switched to a second state, the first edge frame radiator covers at least one low-frequency frequency band, and the second edge frame radiator covers at least one low-frequency frequency band.

7. The antenna structure of claim 6, wherein, When the first middle frame and the second middle frame are in the flat state or the fold state, the first edge frame radiator and the second edge frame radiator cover at least one same low-frequency frequency band.

8. The antenna structure of claim 1, wherein, The second edge frame further comprises a third edge frame radiator and a fourth edge frame radiator. When the first middle frame and the second middle frame are in the flat state or the fold state, the first edge frame radiator, the second edge frame radiator, the third edge frame radiator and the fourth edge frame radiator cover at least one same low-frequency frequency band.

9. The antenna structure of claim 8, wherein, The first edge frame radiator, the second edge frame radiator, the third edge frame radiator and the fourth edge frame radiator all cover a B28 frequency band.

10. A foldable electronic device, characterized by The antenna structure comprises any one of claims 1-9. The antenna structure comprises any one of claims 1-9.

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