Antenna and terminal device having the same

Abstract

The application discloses an antenna and a terminal device with the same. The antenna comprises a substrate, a plurality of open-circuit slots are formed on the substrate and penetrate through the thickness direction of the substrate, the shape of each open-circuit slot is generally E-shaped, each open-circuit slot comprises two first slot segments, a second slot segment, a third slot segment and a fourth slot segment, the two first slot segments are respectively connected perpendicularly at two ends of the second slot segment, the third slot segment is connected with the second slot segment and located between the two first slot segments, the fourth slot segment is connected with the third slot segment, and the fourth slot segment penetrates through the side edge of the substrate; a plurality of feeding structures, the plurality of feeding structures correspond to the plurality of open-circuit slots one by one, and each feeding structure is in feeding connection with the substrate. According to the antenna, low-frequency resonance and high-frequency resonance can be introduced to realize multi-mode co-operation of the antenna, and when the antenna is applied to the terminal device, the performance of the terminal device can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to an antenna and a terminal device having the same. Background Technology

[0002] With the advent of the 5G era, users have higher performance requirements for mobile terminal devices, which in turn increases the space required for antennas within these devices. In related technologies, the relatively simple antenna designs negatively impact the performance of mobile terminal devices. Furthermore, the large size of these antennas makes them difficult to install effectively within the limited space of mobile terminal devices, reducing their practicality. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an antenna that can introduce low-frequency resonance and high-frequency resonance to achieve multi-mode operation of the antenna.

[0004] Another object of the present invention is to provide a terminal device having the above-described antenna.

[0005] An antenna according to a first aspect of the present invention includes: a substrate having a plurality of open-circuit slots formed thereon along the thickness direction of the substrate, each of the open-circuit slots being generally E-shaped, each of the open-circuit slots including two first slot segments, a second slot segment, a third slot segment, and a fourth slot segment, the two first slot segments being perpendicularly connected to the two ends of the second slot segment, the third slot segment being connected to the second slot segment and located between the two first slot segments, the fourth slot segment being connected to the third slot segment, and the fourth slot segment penetrating the side of the substrate; and a plurality of feeding structures, the plurality of feeding structures corresponding one-to-one with the plurality of open-circuit slots, each of the feeding structures being electrically connected to the substrate.

[0006] According to an embodiment of the present invention, the antenna has each open-circuit slot shaped approximately E-shaped, with a fourth slot segment connected to the third slot segment, and the fourth slot segment penetrating the side of the substrate. This allows the antenna to introduce both low-frequency and high-frequency resonances, enabling multi-mode operation. When applied to a terminal device, this effectively improves the device's performance.

[0007] According to some embodiments of the present invention, the width of the fourth slit segment in the length direction of the second slit segment is smaller than the length of the third slit segment in the length direction of the second slit segment.

[0008] According to some embodiments of the present invention, the fourth slot segment is located on one side of one of the two adjacent first slot segments of the third slot segment, and the power supply structure is located at the other of the two first slot segments.

[0009] According to some embodiments of the present invention, each of the power supply structures includes a first power supply segment and a second power supply segment that are connected to each other and perpendicular to each other. The first power supply segment is perpendicular to one of the two first slot segments that is away from the fourth slot segment, and the second power supply segment is perpendicular to the second slot segment. The second power supply segment is located between the one of the two first slot segments that is away from the fourth slot segment and the third slot segment.

[0010] According to some embodiments of the present invention, the fourth slit segment extends from the side of the third slit segment opposite to the second slit segment toward the side of the substrate.

[0011] According to some embodiments of the present invention, the width of each of the first gap segments is smaller than the width of the second gap segment.

[0012] According to some embodiments of the present invention, the width of the fourth gap segment is W1, and the length of the fourth gap segment is L1, wherein W1 and L1 respectively satisfy: 0.5mm≤W1≤1.5mm, 0.5mm≤L1≤1.0mm.

[0013] According to some embodiments of the present invention, the maximum distance between the central axes of the fourth gap segment and the third gap segment along the length direction of the second gap segment is L2, wherein L2 satisfies: 3.0mm < L2 ≤ 4.0mm.

[0014] According to some embodiments of the present invention, the minimum distance between the center of the second feed segment and the center of the third gap segment along the length direction of the second gap segment is L3, wherein L3 satisfies: 5.0mm < L3 ≤ 6.0mm.

[0015] According to some embodiments of the present invention, a plurality of the open-circuit slots are spaced apart along the edge of the substrate.

[0016] The terminal device according to a second aspect of the invention includes an antenna according to the first aspect of the invention described above.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the front of an antenna according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the back of an antenna according to an embodiment of the present invention;

[0021] Figure 3 yes Figure 2 A partial schematic diagram of the antenna shown;

[0022] Figure 4 This is an S-parameter diagram of an antenna according to an embodiment of the present invention;

[0023] Figure 5 This is a current distribution diagram of an antenna according to an embodiment of the present invention.

[0024] Figure label:

[0025] 100: Antenna;

[0026] 1: Substrate; 11: Open circuit gap; 111: First gap segment; 112: Second gap segment 112;

[0027] 113: Third slot segment; 114: Fourth slot segment; 2: Feeding structure; 21: First feeding segment;

[0028] 22: Second power supply section. Detailed Implementation

[0029] The following is for reference. Figures 1-5 An antenna 100 according to an embodiment of the first aspect of the present invention is described.

[0030] like Figures 1-5 As shown, the antenna 100 according to a first aspect embodiment of the present invention includes a substrate 1 and a plurality of feeding structures 2. In the description of the present invention, "a plurality of" means two or more.

[0031] Specifically, a plurality of open-circuit slots 11 are formed on the substrate 1, extending along the thickness direction of the substrate 1. Each open-circuit slot 11 is generally E-shaped and includes two first slot segments 111, a second slot segment 112, a third slot segment 113, and a fourth slot segment 114. The two first slot segments 111 are perpendicularly connected to the two ends of the second slot segment 112, the third slot segment 113 is connected to the second slot segment 112 and located between the two first slot segments 111, and the fourth slot segment 114 is connected to the third slot segment 113 and extends through the side of the substrate 1. A plurality of power supply structures 2 correspond one-to-one with the plurality of open-circuit slots 11, and each power supply structure 2 is connected to the substrate 1 for power supply.

[0032] For example, in Figures 1-3 In the example, two first slot segments 111 can be connected to the two ends of the second slot segment 112 along its length. The two first slot segments 111 are located on the same side of the second slot segment 112 along its width, and each first slot segment 111 extends in a direction away from the second slot segment 112. A third slot segment 113 is connected to the middle of the second slot segment 112, and a fourth slot segment 114 is connected to the side of the third slot segment 113 away from the second slot segment 112. The first slot segments 111, second slot segments 112, third slot segments 113, and fourth slot segments 114 are all interconnected. Multiple feeding structures 2 supply power to the substrate 1. Thus, the antenna 100 can introduce high-frequency resonance while simultaneously introducing a 3.5GHz low-frequency resonance by connecting the fourth slot segment 114 to the third slot segment 113, enabling the antenna 100 to operate in multiple modes. When the antenna 100 is applied to a terminal device, it can effectively improve the performance of the terminal device.

[0033] from Figure 4 From this, we can conclude that the approximate bandwidth of antenna 100 below -10dB in the low-frequency band is 2.92GHz-3.96GHz, and the approximate bandwidth of antenna 100 below -10dB in the high-frequency band is 5.56GHz-5.94GHz. This indicates that antenna 100 has good impedance matching characteristics in both low and high frequencies, thus improving its performance at both frequencies. Figure 5 It can be deduced that at the 3.5GHz low-frequency resonance, the maximum current of antenna 100 is mainly distributed in the two first slot segments 111 and the second slot segment 112, while the minimum current is roughly distributed on one side of the third slot segment 113 adjacent to the feed structure 2 and in the fourth slot segment 114, with no zero points in between. This makes the low-frequency resonance mode of antenna 100 a 1 / 4λ resonance mode. At the 5.8GHz high-frequency resonance, the maximum current of antenna 100 is mainly distributed in the portions of the two first slot segments 111 and the second slot segment 112 of antenna 100 away from the third slot segment 113, while the minimum current is distributed in the fourth slot segment 114 and the third slot segment 113. This makes the high-frequency resonance mode of antenna 100 a 1 / 4λ harmonic resonance mode. Here, λ is the wavelength corresponding to the center frequency of 3.5GHz.

[0034] According to an embodiment of the present invention, the antenna 100 has each open-circuit slot 11 in a generally E-shaped shape, and the fourth slot segment 114 is connected to the third slot segment 113, with the fourth slot segment 114 penetrating the side of the substrate 1. Thus, the antenna 100 can introduce low-frequency resonance and high-frequency resonance to achieve multi-mode operation of the antenna 100. When the antenna 100 is applied to a terminal device, it can effectively improve the performance of the terminal device.

[0035] According to some embodiments of the present invention, the fourth slit segment 114 is in the length direction of the second slit segment 112 (e.g., Figure 2 Width in the left-right direction (e.g., in) Figure 2 The length of the third slot segment 113 in the vertical direction is less than the length of the second slot segment 112 in the longitudinal direction. This ensures that the antenna 100 can effectively introduce a 3.5GHz low-frequency resonance, thereby enabling the antenna 100 to operate at both low and high frequencies simultaneously.

[0036] According to some embodiments of the present invention, the fourth slot segment 114 is located on one side of the third slot segment 113 adjacent to one of the two first slot segments 111, and the power supply structure 2 is located at the other of the two first slot segments 111. Figure 2 and Figure 3 As shown, the fourth slot segment 114 is located on one side of the first slot segment 111, adjacent to the right side of the third slot segment 113, and the feeding structure 2 is located on the left side of the first slot segment 111. Thus, the fourth slot segment 114 and the feeding structure 2 are located on opposite sides of the third slot segment 113, effectively improving the utilization rate of the substrate 1. This allows for a miniaturized design of the antenna 100, and when the antenna 100 is used in a terminal device, it can be effectively installed in the terminal device, improving the practicality of the antenna 100.

[0037] Furthermore, referring to Figures 1-3 Each power supply structure 2 includes a first power supply segment 21 and a second power supply segment 22 that are connected to each other and perpendicular to each other. The first power supply segment 21 is perpendicular to the one of the two first slot segments 111 that is furthest from the fourth slot segment 114. The second power supply segment 22 is perpendicular to the second slot segment 112 and is located between the one of the two first slot segments 111 that is furthest from the fourth slot segment 114 and the third slot segment 113. (Refer to...) Figure 3 The first feed segment 21 is perpendicular to the first slot segment 111 on the left. The second feed segment 22 is located between the first slot segment 111 and the third slot segment 113 on the left. The free end of the second feed segment 22 extends away from the first feed segment 21 and extends beyond the second slot segment 112. Thus, the antenna 100 can be coupled and fed through multiple L-shaped feed structures 2, which can further improve the impedance matching characteristics of the antenna 100 and reduce the coupling effect between open slots 11, so that the antenna 100 can cover the Sub-6GHz band of LTEB42 (3400MHz-3600MHz) and LTEB43 (3600MHz-3800MHz) and the WLAN band centered at 5.8GHz (5.725GHz-5.875GHz).

[0038] According to some embodiments of the present invention, such as Figure 3 As shown, the fourth slit segment 114 extends from the side of the third slit segment 113 opposite to the second slit segment 112 toward the aforementioned side of the substrate 1, so as to ensure that the fourth slit segment 114 is connected to the aforementioned side of the substrate 1, thereby allowing the antenna 100 to introduce low-frequency resonance.

[0039] According to some specific embodiments of the present invention, the width of each first slot segment 111 is smaller than the width of the second slot segment 112. Therefore, the antenna 100 can effectively introduce high-frequency resonance, thereby enabling the antenna 100 to operate simultaneously at low and high frequencies.

[0040] In some alternative embodiments, such as Figure 3 As shown, the width of the fourth slot segment 114 is W1, and the length of the fourth slot segment 114 is L1, wherein W1 and L1 satisfy the following conditions: 0.5mm≤W1≤1.5mm and 0.5mm≤L1≤1.0mm, respectively. This configuration effectively ensures that the width and length of the fourth slot segment 114 are within a reasonable range, thereby enabling the antenna 100 to introduce low-frequency bands and improve the performance of the antenna 100.

[0041] In some alternative embodiments, such as Figure 3 As shown, the maximum distance between the central axes of the fourth slot segment 114 and the third slot segment 113 along the length direction of the second slot segment 112 is L2, where L2 satisfies: 3.0mm < L2 ≤ 4.0mm. This configuration allows the antenna 100 to have good impedance matching in the high-frequency band, while effectively separating the second feed segment 22 from the fourth slot segment 114 to reduce interference to the fourth slot segment 114 and ensure the stability of the antenna 100.

[0042] In some alternative embodiments, such as Figure 3 As shown, the minimum distance between the centers of the second feed section 22 and the third slot section 113 along the length direction of the second slot section 112 is L3, where L3 satisfies: 5.0mm < L3 ≤ 6.0mm. Therefore, by ensuring that L3 satisfies 5.0mm < L3 ≤ 6.0mm, the second feed section 22 and the third slot section 113 can be effectively separated while ensuring the multi-mode operation of the antenna 100, thereby reducing interference to the third slot section 113 and further guaranteeing the stability of the antenna 100.

[0043] According to some embodiments of the present invention, a plurality of open-circuit slots 11 are spaced apart along the edge of the substrate 1. For example, in Figure 1 and Figure 2In the example, two open-circuit slots 11 can be formed on each side of the substrate 1 along its length direction, and the two open-circuit slots 11 are spaced apart from each other along the width direction of the substrate 1. Three open-circuit slots 11 can be formed on each side of the substrate 1 along its width direction, and the three open-circuit slots 11 are spaced apart from each other along the length direction of the substrate 1. This configuration ensures the performance of the antenna 100 while facilitating the fabrication of the antenna 100.

[0044] Optionally, the isolation between two adjacent open-circuit gaps 11 is 10 dB, and the ECC (Envelop Correlation Coefficient) is less than 0.1.

[0045] A terminal device (not shown) according to a second aspect embodiment of the present invention includes an antenna 100 according to the first aspect embodiment described above.

[0046] According to the terminal device of the present invention, by adopting the above-described terminal device, the performance of the terminal device can be effectively improved, thereby enhancing the market competitiveness of the terminal device.

[0047] Other configurations and operations of the terminal device according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An antenna, characterized in that, include: A substrate having a plurality of open-circuit slots extending along the thickness direction of the substrate, each open-circuit slot being generally E-shaped, each open-circuit slot including two first slot segments, a second slot segment, a third slot segment, and a fourth slot segment, the two first slot segments being perpendicularly connected to the two ends of the second slot segment, the third slot segment being connected to the second slot segment and located between the two first slot segments, the third slot segment being used to adjust impedance matching and extend the high-frequency resonant bandwidth, the fourth slot segment being connected to the third slot segment, and the fourth slot segment extending through the side of the substrate; Multiple power feeding structures are provided, and each power feeding structure corresponds to one of the multiple open-circuit gaps. Each power feeding structure is connected to the substrate for power feeding. Wherein, the width of the fourth gap segment in the length direction of the second gap segment is smaller than the length of the third gap segment in the length direction of the second gap segment.

2. The antenna according to claim 1, characterized in that, The fourth slot segment is located on one side of one of the two adjacent first slot segments of the third slot segment, and the power supply structure is located at the other of the two first slot segments.

3. The antenna according to claim 2, characterized in that, Each of the power supply structures includes a first power supply segment and a second power supply segment that are connected to each other and perpendicular to each other. The first power supply segment is perpendicular to one of the two first slot segments that is farther away from the fourth slot segment. The second power supply segment is perpendicular to the second slot segment and is located between the one of the two first slot segments that is farther away from the fourth slot segment and the third slot segment.

4. The antenna according to claim 1, characterized in that, The fourth slit segment extends from the side of the third slit segment opposite to the second slit segment toward the side of the substrate.

5. The antenna according to claim 1, characterized in that, The width of each of the first slit segments is smaller than the width of the second slit segment.

6. The antenna according to claim 1, characterized in that, The width of the fourth gap segment is W1, and the length of the fourth gap segment is L1, wherein W1 and L1 satisfy: 0.5mm≤W1≤1.5mm and 0.5mm≤L1≤1.0mm, respectively.

7. The antenna according to claim 1, characterized in that, The maximum distance between the central axes of the fourth and third gap segments along the length of the second gap segment is L2, wherein L2 satisfies: 3.0mm < L2 ≤ 4.0mm.

8. The antenna according to claim 3, characterized in that, The minimum distance between the center of the second power supply segment and the center of the third gap segment along the length direction of the second gap segment is L3, wherein L3 satisfies: 5.0mm < L3 ≤ 6.0mm.

9. The antenna according to any one of claims 1-8, characterized in that, The plurality of open-circuit slots are spaced apart along the edge of the substrate.

10. A terminal device, characterized in that, Including the antenna according to any one of claims 1-9.

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