Antenna structure and electronic device

Abstract

The present disclosure relates to an antenna structure and an electronic device. The antenna structure comprises a radiator comprising a first upper corner point, a free end and a grounded end; a feed electrically connected to the first upper corner point; wherein the feed excites a first resonant mode of a branch between the grounded end and the free end, and a second resonant mode of the first upper corner point to the grounded end, the first resonant mode generating a resonance covering at least one low frequency band, and the second resonant mode generating a resonance covering at least one 5G band.

Description

Technical Field

[0001] This disclosure relates to the field of terminal technology, and in particular to an antenna structure and electronic device. Background Technology

[0002] With the continuous development of electronic device technology, electronic devices are moving towards larger screen ratios and smaller thicknesses. This has resulted in increasingly limited design space inside electronic devices and smaller design space for antennas. Therefore, the integrated design of antennas has become a key research and development focus. Utility Model Content

[0003] This disclosure provides an antenna structure and electronic device to address the shortcomings of related technologies.

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

[0005] A radiator, the radiator comprising a first upper frame point, a free end, and a ground end;

[0006] Power supply, wherein the power supply is electrically connected to the first upper frame point;

[0007] The power supply excites a first resonant mode of the branch between the ground terminal and the free terminal, and excites a second resonant mode between the first upper frame point and the ground terminal. The first resonant mode generates a resonance covering at least one low-frequency band, and the second resonant mode generates a resonance covering at least one 5G frequency band.

[0008] Optionally, the radiator further includes a second upper frame point that is grounded, the second upper frame point being located between the first upper frame point and the grounding end.

[0009] Optionally, the distance between the first upper frame point and the second upper frame point is greater than or equal to 1 mm and less than or equal to 4 mm.

[0010] Optionally, it also includes a first capacitor, one end of which is grounded and the other end is electrically connected to the second upper frame.

[0011] Optionally, a second capacitor may also be included, which is connected in series between the power supply and the first upper frame point.

[0012] Optionally, the first resonance mode is a 1 / 4 resonance mode, and the second resonance mode is a loop resonance mode.

[0013] Optionally, the second resonant mode generates a resonance covering the N78 frequency band.

[0014] Optionally, the second resonant mode generates a resonance covering the N78 frequency band.

[0015] Optionally, the first resonant mode generates a resonance covering the N28 frequency band.

[0016] According to a second aspect of the present disclosure, an electronic device is provided, including an antenna structure as described in any of the foregoing embodiments.

[0017] Optionally, the electronic device further includes a metal frame, and the radiator is a segment of the metal frame.

[0018] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0019] As can be seen from the above embodiments, the 5G band and low-frequency band in this disclosure are integrated into the same radiator, which helps to reduce the space requirements of electronic devices and improve the integration of the antenna structure.

[0020] 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

[0021] 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.

[0022] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment.

[0023] Figure 2 yes Figure 1 A graph showing the relationship between the reflection coefficient and frequency of the antenna structure.

[0024] Figure 3 yes Figure 1 Radiation efficiency curve of the antenna structure.

[0025] Figure 4 yes Figure 1 A schematic diagram of the current distribution in the first resonant mode of the antenna structure.

[0026] Figure 5 yes Figure 1 A schematic diagram of the current distribution in the second resonant mode of the antenna structure.

[0027] Figure 6 yes Figure 1 Simulation diagram of current distribution in the antenna structure.

[0028] Figure 7 This is a schematic diagram of another antenna structure according to an exemplary embodiment. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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."

[0032] Figure 1 This is a schematic diagram illustrating an antenna structure according to an exemplary embodiment. For example... Figure 1 As shown, the antenna structure includes a radiator 1 and a feed 2. The radiator 1 includes a first upper frame point 11, a free end 12, and a grounding end 13. The free end 12 can cooperate with the opposite antenna to form an antenna gap, ensuring that the radiated signal from the radiator 1 can be successfully radiated into the external space. The grounding end 13 can be grounded via a circuit or connected to a metal ground plane via a metal rib, with the grounding achieved through the metal rib. The feed 2 is electrically connected to the first upper frame point 11. Of course, other matching circuits or tuning circuits can also be provided in the connection circuit between the feed 2 and the first upper frame point 11; this disclosure does not impose any limitations on this.

[0033] When the excitation signal is fed into the feed 2, it can excite the first resonant mode of the stub between the ground end 13 and the free end 12, and it can also excite the second resonant mode between the first upper frame point 11 and the ground end 13. The first resonant mode can generate a resonance covering at least one low-frequency band, and the second resonant mode can generate a resonance covering at least one 5G frequency band. In this way, the 5G frequency band and the low-frequency band can be integrated into the same radiator 1, which helps to reduce the frame space requirements of electronic devices and improve the integration of the antenna structure.

[0034] For example, taking the first resonant mode generating resonance covering the N28 frequency band and the second resonant mode generating resonance covering the N78 frequency band as an example, Figure 2 As shown, referring to the abscissa values ​​of the first and third marker points, radiator 1 produced a resonance covering the N28 frequency band in the range of 0.703GHz-0.803GHz; referring to the abscissa values ​​of the fourth and sixth marker points, radiator 1 produced a resonance covering the N78 frequency band in the range of 3.3GHz-4.2GHz. Furthermore, as... Figure 3 As shown, the Figure 3 The radiation efficiency curve of radiator 1 is shown. Referring to the horizontal axis value of the third marker point, radiator 1 has good radiation efficiency around 0.7 GHz, therefore radiator 1 has high radiation efficiency in the N28 band. Referring to the horizontal axis values ​​of the first and second marker points, radiator 1 has good radiation efficiency in the range of 3.3 GHz to 4.2 GHz, therefore radiator 1 has high radiation efficiency in the N78 band.

[0035] like Figures 4-5 As shown, in some embodiments, the first resonant mode is a quarter-resonant mode excited by the excitation signal, and the second resonant mode is a loop resonant mode excited by the excitation signal. Thus, as... Figure 6 As shown, the current zero point of the loop resonance mode is located in the middle of the branch between the first upper frame point 11 and the ground terminal 13. The current distribution on both sides of the current zero point is relatively uniform, and the current flows in opposite directions, which can cancel each other out. Therefore, the SAR value in the loop resonance mode can be reduced, so that the radiator 1 has low SAR radiation performance in the 5G band.

[0036] In some embodiments, in order to further reduce the SAR value of radiator 1 in the second resonant mode, such as Figure 7As shown, the antenna structure also includes a second upper frame point 14 grounded, located between the first upper frame point 11 and the ground terminal 13. This second upper frame point 14 allows current to be introduced into the ground, further reducing the radiated SAR value of the 5G band. To reduce the impact on the performance of the loop resonant mode between the first upper frame point 11 and the ground terminal 13, the second upper frame point 14 is located near the first upper frame point 11, thus creating a strong current point in the region between the second upper frame point 14 and the first upper frame point 11. For example, the distance between the second upper frame point 14 and the first upper frame point 11 can be greater than or equal to 1 mm and less than or equal to 4 mm. For instance, the distance between the second upper frame point 14 and the first upper frame point 11 can be 2 mm, 3 mm, 3.5 mm, etc.

[0037] In some embodiments, the antenna structure further includes a first capacitor 3, one end of which is grounded and the other end is electrically connected to the second upper frame point 14. That is, the second upper frame point 14 can be grounded through the first capacitor 3. On the one hand, the resonance of N78 can be induced through the first capacitor 3, and on the other hand, the current can be conducted to the ground to reduce the SAR value.

[0038] In some embodiments, the antenna structure further includes a second capacitor 4, which is connected in series between the feed 2 and the first upper frame point 11. The resonance of N28 can be tuned through the second capacitor 4. Of course, in addition to the second capacitor 4, a switching circuit or other tuning elements can be connected in parallel on the circuit between the feed 2 and the first upper frame point 11, or other tuning elements can be connected in series. This disclosure does not limit this.

[0039] Based on the technical solution of this disclosure, an electronic device is also provided. This electronic device may include the antenna structure described in any of the above embodiments. By setting the antenna structure, low-frequency band signals and 5G band signals can be compatible on the same radiator of the electronic device. Further, the electronic device may include a metal frame, and the radiator 1 may be a segment of the metal frame, such as a side frame segment or a top frame segment. This disclosure does not impose any limitations on this.

[0040] 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.

[0041] 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, include: A radiator, the radiator comprising a first upper frame point, a free end, and a ground end; Power supply, wherein the power supply is electrically connected to the first upper frame point; The power supply excites a first resonant mode of the branch between the ground terminal and the free terminal, and excites a second resonant mode between the first upper frame point and the ground terminal. The first resonant mode generates a resonance covering at least one low-frequency band, and the second resonant mode generates a resonance covering at least one 5G frequency band.

2. The antenna structure according to claim 1, characterized in that, The radiator also includes a second upper frame point that is grounded, and the second upper frame point is located between the first upper frame point and the grounding end.

3. The antenna structure according to claim 2, characterized in that, The distance between the first upper frame point and the second upper frame point is greater than or equal to 1 mm and less than or equal to 4 mm.

4. The antenna structure according to claim 2, characterized in that, It also includes a first capacitor, one end of which is grounded and the other end is electrically connected to the second upper frame.

5. The antenna structure according to claim 1, characterized in that, It also includes a second capacitor, which is connected in series between the power supply and the first upper frame point.

6. The antenna structure according to claim 1, characterized in that, The first resonance mode is a 1 / 4 resonance mode, and the second resonance mode is a loop resonance mode.

7. The antenna structure according to claim 1, characterized in that, The second resonant mode generates resonance covering the N78 frequency band.

8. The antenna structure according to claim 1, characterized in that, The first resonant mode generates resonance covering the N28 frequency band.

9. An electronic device, characterized in that, The antenna structure includes any one of claims 1-8.

10. The electronic device according to claim 9, characterized in that, The electronic device also includes a metal frame, and the radiator is a segment of the metal frame.

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