Antenna structure and electronic equipment

Abstract

This disclosure relates to an antenna structure and an electronic device. The antenna structure includes: a feed point for connection to a feed circuit; a stub radiator including a first radiating arm and a second radiating arm connected to the first radiating arm, the second radiating arm being divided into a first stub and a second stub by the first radiating arm, the length of the first stub being greater than the length of the second stub, the feed point being disposed on the first radiating arm, and the stub radiator being excited to generate multiple resonant modes; and a rectangular ring radiator, the rectangular ring radiator being stacked with the stub radiator, and a coupling gap being disposed between the rectangular ring radiator and the stub radiator, the rectangular ring radiator being coupled to the feed point with the stub radiator, the rectangular ring radiator being excited to generate resonant modes, and the resonant modes of the stub radiator and the resonant modes of the rectangular ring radiator jointly covering multiple operating frequency bands.

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] To adapt to the application and development of 5G technology, current electronic devices typically require dedicated 5G antennas for 5G communication. Additionally, to meet wireless transmission and other communication needs, other antennas are also required. However, the trend towards thinner and lighter electronic devices means that their internal space usually doesn't have enough room to accommodate many antennas. Therefore, miniaturizing antenna structures has become one of the key technical challenges that needs to be addressed. Summary of the Invention

[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] Feed point, the feed point being used to connect to the feed circuit;

[0006] A stub radiator includes a first radiating arm and a second radiating arm connected to the first radiating arm. The second radiating arm is divided into a first stub and a second stub by the first radiating arm. The length of the first stub is greater than the length of the second stub. The feed point is located on the first radiating arm. The stub radiator is excited to generate multiple resonant modes.

[0007] A rectangular ring radiator is stacked with a branch radiator, and a coupling gap is provided between the rectangular ring radiator and the branch radiator. The rectangular ring radiator and the branch radiator are coupled to a feed point. The rectangular ring radiator is excited to produce a resonant mode. The resonant modes of the branch radiator and the resonant modes of the rectangular ring radiator together cover multiple operating frequency bands.

[0008] Optionally, the antenna structure covers the N78 band, N79 band, and WIFI 6E band.

[0009] Optionally, the composite mode of the quarter-wavelength mode formed by the stub radiator from the feed point to the end of the first stub, the quarter-wavelength mode formed from the feed point to the end of the second stub, and the half-wavelength mode of the rectangular loop antenna, coupled together, covers the N78 frequency band.

[0010] Optionally, the half-wavelength mode of the rectangular loop antenna and the quarter-wavelength mode of the stub radiator from the feed point to the end of the first stub respectively cover the N79 frequency band.

[0011] Optionally, the quarter-wavelength mode of the stub radiator from the feed point to the end of the first stub, the half-wavelength mode of the second radiating arm, and the three-quarter-wavelength mode from the feed point to the ends of the first and second stubs together cover the frequency band of WIFI 6E.

[0012] Optionally, a matching circuit may also be included, which is connected between the feed point and the second radiating arm.

[0013] Optional, also includes:

[0014] A plastic support frame, wherein the branch radiators are formed on the plastic support frame;

[0015] The rectangular loop antenna is used to connect to the battery cover of an electronic device configured with the antenna structure.

[0016] Optionally, the length of the rectangular annular radiator is equal to 0.19λ and the width is equal to 0.125λ;

[0017] The length of the rectangular ring in the middle of the rectangular annular radiator is equal to 0.125λ, and the width is equal to 0.075λ.

[0018] The length of the first radiating arm is 0.13λ, and the length of the second radiating arm is 0.07λ.

[0019] Where λ is the free-space wavelength corresponding to the center frequency of the N78 band.

[0020] According to a second aspect of the present disclosure, an electronic device is provided, comprising:

[0021] Battery cover;

[0022] As described in any one of the above antenna structures, the rectangular loop antenna is disposed on the inner surface of the battery cover.

[0023] Optionally, the rectangular annular radiator comprises a copper rectangular annular radiator; or the rectangular annular radiator comprises a conductive silver paste annular radiator. The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0024] As can be seen from the above embodiments, in this disclosure, by using the feed current at the feed point and the coupling between the rectangular loop antenna and the stub radiator, the stub radiator can resonate in multiple operating frequency bands, and the rectangular loop antenna can resonate in multiple operating frequency bands. This is beneficial for widening the operating frequency band of the antenna structure while avoiding the need to set multiple feed points and grounding points, simplifying the antenna structure, and facilitating both broadband and miniaturization.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a partial cross-sectional schematic diagram of an electronic device according to an exemplary embodiment.

[0028] Figure 2 This is a partial schematic diagram of an antenna structure according to an exemplary embodiment.

[0029] Figure 3 yes Figure 2 An exploded view of the stubby radiator and the rectangular ring radiator in the antenna structure.

[0030] Figure 4 This is an S11 curve diagram illustrating an antenna structure according to an exemplary embodiment.

[0031] Figure 5 This is a Smith chart illustrating an antenna structure according to an exemplary embodiment.

[0032] Figure 6 This is a radiation efficiency diagram of an antenna structure according to an exemplary embodiment.

[0033] Figure 7 This is a current distribution diagram of an antenna structure according to an exemplary embodiment.

[0034] Figure 8 This is another current distribution diagram of an antenna structure according to an exemplary embodiment.

[0035] Figure 9 This is yet another current distribution diagram of an antenna structure according to an exemplary embodiment.

[0036] Figure 10 This is another current distribution diagram of an antenna structure according to an exemplary embodiment.

[0037] Figure 11 This is another current distribution diagram of an antenna structure 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. 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.

[0039] 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.

[0040] 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."

[0041] Figure 1 This is a partial cross-sectional schematic diagram of an electronic device 100 according to an exemplary embodiment. Figure 2 This is a partial schematic diagram of an antenna structure 200 according to an exemplary embodiment. Figure 3 yes Figure 2 An exploded view of the stubby radiator 1 and the rectangular ring radiator 2 of the antenna structure 200. (See attached diagram.) Figures 1-3As shown, the electronic device 100 may include a battery cover 101, a circuit board 102, and an antenna structure 200. The circuit board 102 may be equipped with a feed circuit electrically connected to the antenna structure 200 to excite the antenna structure 200 to resonate and radiate electromagnetic waves. The antenna structure 200 may include a stub radiator 1, a rectangular ring radiator 2, a feed point 3 disposed on the stub radiator 1, and a plastic support 4. The stub radiator 1 can form the surface of the plastic support 4, specifically through laser forming technology. The rectangular ring radiator 2 can be bonded to the inner surface of the battery cover 101. By placing the larger rectangular ring radiator 2 on the battery cover 101 and fixing the smaller stub radiator 1 with the plastic support 4, the size of the plastic support 4 can be designed to be relatively small, thus reducing the space occupied by the antenna structure 200.

[0042] The stub radiator 1 may include a first radiating arm 11 and a second radiating arm 12. The first radiating arm 11 is connected to the second radiating arm 12, and the first radiating arm 11 is basically perpendicular to the second radiating arm 12, forming a T-shape. The second radiating arm 12 can divide the first radiating arm 11 into a first stub 121 and a second stub 122. The length of the first stub 121 is greater than the length of the second stub 122. The feed point 3 can be set at the first radiating arm 11, and the feed point 3 can be connected to the feed circuit of the circuit board 102 through a metal spring or other conductive wire. By feeding the signal through the feed point 3 and the length difference between the first stub 121 and the second stub 122, it is beneficial to construct multiple resonant modes of the stub radiator 1, so that the multiple resonators of the antenna structure 200 resonate at different operating frequency bands, helping the antenna structure 200 to cover a sufficiently wide frequency band.

[0043] A rectangular annular radiator 2 can be disposed on the surface of the battery cover 101 facing the interior of the electronic device 100. This rectangular annular radiator 2 can be stacked with the branch radiator 1, and... Figure 1 As shown, in the thickness direction of the electronic device 100, a certain coupling gap can be set between the stub radiator 1 and the rectangular ring radiator 2. Feeding is achieved through the coupling between the stub radiator 1 and the rectangular ring radiator 2 to excite the rectangular ring radiator 2 to generate a corresponding resonant mode. Based on this, the resonant modes generated by the stub radiator 1 and the rectangular ring radiator 2 can jointly cover multiple operating frequency bands, which is beneficial for achieving broadband antenna structure 200. Furthermore, the antenna structure 200 in this disclosure has only a single feed point 3 and no grounding point, which helps reduce the number of springs conducting the feed point and achieves miniaturization of the antenna structure 200.

[0044] For example, by appropriately setting the dimensions of the stub radiator 1 and the rectangular ring radiator 2, and adding suitable tuning and matching circuits, the matching circuit can be connected between the feed point 3 and the first radiating arm 11 to perform impedance matching on the antenna structure 200. Figure 3 As shown, the rectangular annular radiator 2 has a length of 0.19λ and a width of 0.125λ. The middle rectangular ring of the rectangular annular radiator 2 has a length of 0.125λ and a width of 0.075λ. The first radiating arm has a length of 0.07λ, and the second radiating arm has a length of 0.13λ, where λ is the free-space wavelength corresponding to the center frequency of the N78 frequency band. Based on this, the following is obtained: Figure 4 The simulation curve of antenna structure 200 shown is the S11 curve. Figure 5 This is the Smith chart after matching with a characteristic impedance of 50 ohms. Figure 6 This is a simulation efficiency curve of antenna structure 200. (Example) Figures 4-6 As shown, the antenna structure 200 can cover the N78 band (3.3GHz~3.8GHz), the N79 band (4.4GHz~5GHz), and the WIFI 6E band (5.15GHz~7.125GHz). Moreover, the S11 value in both the N79 band and the WIFI 6E band is less than -6dB, which meets the radiation requirements and forms an ultra-wide bandwidth.

[0045] Moreover, as Figure 5 As shown, see the simulation efficiency curve of antenna structure 200. Figure 5 Curves S1 and S2 are shown in the figure. Curve S1 represents the ratio of the radiated power to the input power of antenna structure 200, and curve S2 represents the ratio of the radiated power to the difference between the input power and the port reflected power of antenna structure 200. The area between the first and second points shows the antenna efficiency of antenna structure 200 in the N78 band; the area between the third and fourth points shows the antenna efficiency in the N79 band; and the area between the fifth, sixth, and seventh points shows the antenna efficiency in the WIFI 6E band. It can be seen that the radiation efficiency of antenna structure 200 is uniformly good across the N78, N79, and WIFI 6E bands. Especially in the WIFI 6E band, the maximum fluctuation range of radiation efficiency does not exceed 1 dB, indicating excellent radiation performance.

[0046] Based on this, the antenna structure 200 provided in this disclosure can simultaneously cover the N78 band, the N79 band, and the WIFI 6E band. Compared with the related technologies that use a dedicated 5G antenna with at least one feed point and one spring piece and a WIFI antenna independent of the 5G antenna to cover the ultra-wideband WIFI 6E, this method helps to reduce the number of radiators and optimize the internal space of the electronic device 100.

[0047] like Figure 7 As shown, the resonant modes of the stub radiator 1 can include a quarter-wavelength mode formed from the feed point 3 to the end of the first stub 121 and a quarter-wavelength mode formed from the feed point 3 to the end of the second stub 122. The rectangular ring radiator 2 can include a half-wavelength mode as its resonant mode. The composite mode formed by the mutual coupling between the quarter-wavelength mode formed by the first stub 121, the quarter-wavelength mode formed by the second stub 122, and the half-wavelength mode formed by the rectangular ring radiator 2 can cover the N78 frequency band. Among them, the current of the quarter-wavelength mode formed from the feed point 3 to the end of the first stub 121 flows from the feed point to the end of the first stub 121, and the current intensity gradually decreases; the current of the quarter-wavelength mode formed from the feed point 3 to the end of the second stub 122 flows from the feed point 3 to the end of the second stub 122, and the current intensity gradually decreases; the current of the half-wavelength mode of the rectangular ring radiator 2 is mainly distributed along the side length in the width direction of the rectangular ring radiator 2, and the current zero point is located on the side length in the width direction.

[0048] like Figure 8 and Figure 9 As shown, the resonant modes of the stub radiator 1 may include a quarter-wavelength mode formed from the feed point 3 to the end of the first stub 121, and the resonant modes of the rectangular ring radiator 2 may include a half-wavelength mode. The stub radiator 1 is as follows... Figure 9 The quarter-wavelength mode and rectangular ring radiator 2 shown are as follows: Figure 8 The half-wavelength mode shown can cover the N79 band.

[0049] like Figures 9-11 As shown, the resonant modes of the stub radiator 1 can include a quarter-wavelength mode formed from the feed point 3 to the end of the first stub 121, such as... Figure 10 As shown, the resonant modes of the stub radiator 1 may include half-wavelength modes of the second radiating arm 12, such as... Figure 11 As shown, the resonant modes of the stub radiator 1 can also include a three-quarter wavelength mode formed from the feed point 3 to the end of the first stub 121 and the end of the second stub 122. Figure 9 Quarter-wavelength mode in Figure 10 Half-wavelength mode and Figure 11 Three-quarters of the wavelengths in the spectrum collectively cover the operating frequency band of Wi-Fi 6E. Figure 10 In the half-wavelength mode of the second radiating arm 12, there is a strong current in the middle of the second radiating arm 12, which gradually weakens towards both ends of the second radiating arm 12. Figure 11In the three-quarter wavelength mode from the feed point 3 to the end of the first stub 121 and the end of the second stub 122, the current feed point 3 is directed toward the ends of the first stub 121 and the second stub 122, and strong current regions appear near the feed point 3 of the first radiating arm 11 and in the middle region of the second radiating arm 12, respectively.

[0050] In the above embodiments, the rectangular annular radiator 2 may include a copper rectangular annular radiator, which can be bonded to the inner surface of the battery cover 101 by means of adhesive bonding; or, the rectangular annular radiator may include a conductive silver paste annular radiator, which can be formed on the inner surface of the battery cover 101 by means of printing. This disclosure does not limit this.

[0051] 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.

[0052] 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: Feed point, the feed point being used to connect to the feed circuit; A stub radiator includes a first radiating arm and a second radiating arm connected to the first radiating arm. The second radiating arm is divided into a first stub and a second stub by the first radiating arm. The length of the first stub is greater than the length of the second stub. The feed point is located on the first radiating arm. The stub radiator is excited to generate multiple resonant modes, so that the stub radiator resonates in multiple operating frequency bands. A rectangular ring radiator is stacked with a branch radiator, and a coupling gap is provided between the rectangular ring radiator and the branch radiator. The rectangular ring radiator and the branch radiator are coupled and fed. The rectangular ring radiator is excited to produce a resonant mode. The resonant modes of the branch radiator and the resonant modes of the rectangular ring radiator together cover multiple operating frequency bands. The quarter-wavelength mode of the stub radiator from the feed point to the end of the first stub, the half-wavelength mode of the second radiating arm, and the three-quarter-wavelength mode from the feed point to the ends of the first and second stubs together cover the frequency band of WIFI 6E.

2. The antenna structure according to claim 1, characterized in that, The antenna structure covers the N78 band, N79 band, and WIFI 6E band.

3. The antenna structure according to claim 1, characterized in that, The composite mode formed by coupling the quarter-wavelength mode of the stub radiator from the feed point to the end of the first stub, the quarter-wavelength mode from the feed point to the end of the second stub, and the half-wavelength mode of the rectangular ring radiator covers the N78 frequency band.

4. The antenna structure according to claim 1, characterized in that, The half-wavelength mode of the rectangular annular radiator and the quarter-wavelength mode of the stub radiator from the feed point to the end of the first stub respectively cover the N79 frequency band.

5. The antenna structure according to claim 1, characterized in that, It also includes a matching circuit connected between the feed point and the second radiating arm.

6. The antenna structure according to claim 1, characterized in that, Also includes: A plastic support frame, wherein the branch radiators are formed on the plastic support frame; The rectangular annular radiator is used to connect to the battery cover of an electronic device configured with the antenna structure.

7. The antenna structure according to claim 1, characterized in that, The rectangular annular radiator has a length of 0.19λ and a width of 0.125λ. The length of the rectangular ring in the middle of the rectangular annular radiator is equal to 0.125λ, and the width is equal to 0.075λ. The length of the first radiating arm is 0.13λ, and the length of the second radiating arm is 0.07λ. Where λ is the free-space wavelength corresponding to the center frequency of the N78 band.

8. An electronic device, characterized in that, include: Battery cover; According to any one of claims 1-7, the rectangular annular radiator is disposed on the inner surface of the battery cover.

9. The electronic device according to claim 8, characterized in that, The rectangular annular radiator includes a copper rectangular annular radiator; or the rectangular annular radiator includes a conductive silver paste annular radiator.

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