Dual-band WLAN antenna and mobile terminal

Abstract

The utility model discloses a dual-band WLAN antenna and a mobile terminal, and relates to the technical field of antennae, the dual-band WLAN antenna comprises a dielectric substrate, an antenna floor and a dipole antenna, the antenna floor is arranged on the upper surface of the dielectric substrate; the dipole antenna comprises a first dipole branch knot and a second dipole branch knot, the first dipole branch knot and the second dipole branch knot are both connected to the antenna floor, an opening gap is formed between the first dipole branch knot and the second dipole branch knot, and the length of the opening gap is larger than the longitudinal length of the first dipole branch knot and the longitudinal length of the second dipole branch knot. The first dipole branch extends and bends back to the second dipole branch to form a first bending portion, and the second dipole branch extends and bends back to the first dipole branch to form a second bending portion.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a dual-band WLAN antenna and a mobile terminal. Background Art

[0002] With the rapid development of wireless communications in recent years, WLAN (wireless local area network) operating frequency bands have become increasingly numerous and complex. Simultaneously, the demand for high speeds and large channel capacity has led to increasingly wider WLAN bandwidths. To meet the diverse standards of various countries and maintain compatibility with existing WLAN frequency bands, the next generation of WLAN antennas must offer broadband, multi-band capabilities.

[0003] Dipole antennas are widely used in mobile devices due to their simple structure, ease of integration, and bidirectional radiation. However, due to the tight space constraints of mobile devices, dipole antennas are often limited to a low clearance height, resulting in a narrow bandwidth. Further research is needed to expand the antenna's bandwidth within this small installation space. Utility Model Content

[0004] The main purpose of the utility model is to provide a dual-band WLAN antenna and a mobile terminal, aiming to expand the bandwidth of the antenna in a smaller installation space.

[0005] To achieve the above objectives, the dual-band WLAN antenna proposed in the present invention includes:

[0006] dielectric substrate;

[0007] an antenna floor, the antenna floor being arranged on the upper surface of the dielectric substrate;

[0008] A dipole antenna, the dipole antenna comprising a first dipole branch and a second dipole branch, the first dipole branch and the second dipole branch both being connected to the antenna floor, an open gap being formed between the first dipole branch and the second dipole branch, the length of the open gap being greater than the longitudinal length of the first dipole branch and the second dipole branch, the first dipole branch extending and bending away from the second dipole branch to form a first bending portion, and the second dipole branch extending and bending away from the first dipole branch to form a second bending portion.

[0009] In one embodiment, the dual-band WLAN antenna further includes a feed line, the feed line including an inner conductor and an outer conductor distributed radially, the outer conductor being wrapped around the periphery of the inner conductor, the first dipole branch being formed with a grounding hole, the second dipole branch being formed with a feeding hole, the outer conductor being connected to the antenna floor through the grounding hole, and the inner conductor being connected to the second dipole branch through the feeding hole.

[0010] In one embodiment, the grounding hole is provided at a connection position between the first dipole branch and the antenna floor, and the feeding hole is provided at a connection position between the second dipole branch and the antenna floor.

[0011] In one embodiment, the first bending portion and the second bending portion are both arranged in a stepped shape.

[0012] In one embodiment, a chamfer is formed on one end of the first dipole branch close to the second dipole branch.

[0013] In one embodiment, the first bending portion and the second bending portion are symmetrically arranged along the opening gap, and a first rectangular notch is formed at the connection portion between the antenna floor and the second dipole branch, and one side of the first rectangular notch is flush with the inner edge of the second dipole branch.

[0014] In one embodiment, the first bending portion and the second bending portion are asymmetrically designed, a second rectangular notch is formed at a connection portion between the antenna floor and the first dipole branch, and one side of the second rectangular notch is parallel to the opening gap.

[0015] In one embodiment, the second dipole branch extends laterally in a direction away from the first dipole branch to form an open branch, and the open branch is located between the second bending portion and the antenna floor.

[0016] In one embodiment, along the length direction of the opening slit, the width of the opening slit close to the chamfered end is smaller than the width of the opening slit away from the chamfered end.

[0017] The present invention further provides a mobile terminal, comprising a dual-band WLAN antenna, wherein the dual-band WLAN antenna comprises:

[0018] dielectric substrate;

[0019] an antenna floor, the antenna floor being arranged on the upper surface of the dielectric substrate;

[0020] A dipole antenna, the dipole antenna comprising a first dipole branch and a second dipole branch, the first dipole branch and the second dipole branch both being connected to the antenna floor, an open gap being formed between the first dipole branch and the second dipole branch, the length of the open gap being greater than the longitudinal length of the first dipole branch and the second dipole branch, the first dipole branch extending and bending away from the second dipole branch to form a first bending portion, and the second dipole branch extending and bending away from the first dipole branch to form a second bending portion.

[0021] The technical solution of the present invention achieves resonance in two different frequency bands through a specific physical structure. The dielectric substrate and antenna floor of the antenna constitute the basic platform of the antenna. The first dipole branch and the second dipole branch form a dipole antenna. After the radio frequency current is passed through, a loop is formed, which generates a changing electric field and magnetic field, and radiates outward in the form of electromagnetic waves. In addition, since an open gap is formed between the first dipole antenna and the second dipole antenna, a slot antenna is formed at the gap position after power is turned on, so that the antenna can resonate at two different frequencies, thereby covering two frequency bands. The bending design of the first and second dipole branches, that is, the first bending portion and the second bending portion, is used to further adjust the electrical characteristics of the antenna to optimize its performance in the two frequency bands. While maintaining a compact size, it provides wider frequency band coverage and higher radiation efficiency to meet the installation requirements of the antenna in the mobile terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 A top view of embodiment 1 of the dual-band WLAN antenna provided by the present invention;

[0024] Figure 2 for Figure 1 Side view of the dual-band WLAN antenna;

[0025] Figure 3 for Figure 1 Rear view of the dual-band WLAN antenna;

[0026] Figure 4 This is a schematic diagram of the electric field distribution of the slot antenna of the dual-band WLAN antenna of the present invention at 5.90 GHz;

[0027] Figure 5 This is a schematic diagram of the electric field distribution of the slot antenna of the dual-band WLAN antenna of the present invention at 7.35 GHz;

[0028] Figure 6 A top view of embodiment 2 of the dual-band WLAN antenna provided by the present invention;

[0029] Figure 7 This is a schematic diagram of the S11 simulation results of the dual-band WLAN antenna provided by the present invention;

[0030] Figure 8 A schematic diagram of a curve showing the simulated actual gain of the dual-band WLAN antenna provided by the present invention;

[0031] Figure 9 This is a schematic diagram of the actual test results of the voltage standing wave ratio of Example 2 of the dual-band WLAN antenna provided by the present invention.

[0032] Description of Figure Numbers:

[0033] 1000. Dual-band WLAN antenna; 1. Dielectric substrate; 2. Antenna floor; 21a. First rectangular notch; 21b. Second rectangular notch; 3. Dipole antenna; 31. First dipole branch; 311. First bend; 312. Grounding hole; 32. Second dipole branch; 321. Second bend; 322. Feed hole; 323. Open branch; 4. Open gap; 5. Feed line; 51. Inner conductor; 52. Outer conductor.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] With the rapid development of wireless communications in recent years, WLAN (wireless local area network) operating frequency bands have become increasingly numerous and complex. Simultaneously, the demand for high speeds and large channel capacity has led to increasingly wider WLAN bandwidths. To meet the diverse standards of various countries and maintain compatibility with existing WLAN frequency bands, the next generation of WLAN antennas must offer broadband, multi-band capabilities.

[0039] Dipole antennas are widely used in mobile devices due to their simple structure, ease of integration, and bidirectional radiation. However, due to the tight space constraints of mobile devices, dipole antennas are often limited to a low clearance height, resulting in a narrow bandwidth. Further research is needed to expand the antenna's bandwidth within this small installation space.

[0040] To solve the above problems, please refer to Figures 1 to 9 The present invention provides a dual-band WLAN antenna 1000, comprising a dielectric substrate 1, an antenna floor 2, and a dipole antenna 3. The antenna floor 2 is disposed on the upper surface of the dielectric substrate 1. The dipole antenna 3 comprises a first dipole branch 31 and a second dipole branch 32. Both the first dipole branch 31 and the second dipole branch 32 are connected to the antenna floor 2. An open gap 4 is formed between the first dipole branch 31 and the second dipole branch 32. The length of the open gap 4 is greater than the longitudinal length of the first dipole branch 31 and the second dipole branch 32. The first dipole branch 31 extends and bends away from the second dipole branch 32 to form a first bent portion 311. The second dipole branch 32 extends and bends away from the first dipole branch 31 to form a second bent portion 321.

[0041] The technical solution of the present invention achieves resonance in two different frequency bands through a specific physical structure. The dielectric substrate 1 and antenna floor 2 of the antenna constitute the basic platform of the antenna. The first dipole branch 31 and the second dipole branch 32 form a dipole antenna 3. After the radio frequency current is passed through, a loop is formed, generating a changing electric field and magnetic field, which radiate outward in the form of electromagnetic waves. In addition, since an open gap 4 is formed between the first dipole antenna 3 and the second dipole antenna 3, a gap antenna is formed at the gap position after power is applied, so that the antenna can resonate at two different frequencies, thereby covering two frequency bands. The bending design of the first and second dipole branches 32, namely the first bending portion 311 and the second bending portion 321, is used to further adjust the electrical characteristics of the antenna to optimize its performance in the two frequency bands. While maintaining a compact size, it provides wider frequency band coverage and higher radiation efficiency to meet the installation requirements of the antenna in the mobile terminal.

[0042] In an optional embodiment, to achieve the power feeding and ground feeding connection of the dual-band WLAN antenna 1000, the dual-band WLAN antenna 1000 further includes a feed line 5, which includes an inner conductor 51 and an outer conductor 52 distributed in a radial direction. The outer conductor 52 is wrapped around the outer periphery of the inner conductor 51. The first dipole branch 31 is formed with a grounding hole 312, and the second dipole branch 32 is formed with a feeding hole 322. The outer conductor 52 is connected to the antenna ground 2 through the grounding hole 312, and the inner conductor 51 is connected to the second dipole branch 32 through the feeding hole 322. Please refer to Figures 1 to 3 The design of the inner conductor 51 and outer conductor 52 in the feeder line 5, as well as their connection to the dipole branch, are crucial for ensuring effective signal transmission. The outer conductor 52 is connected to the antenna ground plane 2 via the grounding hole 312, which helps provide a good ground plane and thus reduces signal reflection and loss. The inner conductor 51 is connected to the second dipole branch 32 via the feed hole 322. By selecting the appropriate feed position, the impedance matching of the dual-band WLAN antenna 1000 can be optimized, improving signal transmission efficiency. This ensures high performance of the antenna in dual bands while also simplifying the integration of the antenna with the mobile terminal.

[0043] In an optional embodiment, to improve the dual-band performance of the dual-band WLAN antenna 1000, the grounding hole 312 is provided at the connection between the first dipole branch 31 and the antenna floor 2, and the feeding hole 322 is provided at the connection between the second dipole branch 32 and the antenna floor 2. Figures 1 to 3In this embodiment, both the feed hole 322 and the ground hole 312 are perpendicularly formed in the dielectric substrate 1 and are connected to the inner conductor 51 and outer conductor 52 of the feed line 5, respectively, to facilitate the input of RF current into the dual-band WLAN antenna 1000. The connection between the feed line 5 and the dual-band WLAN antenna 1000 divides the open slot 4 into two sections: the first section is the slot between the first and second dipole antennas 3, and the second section is the slot extending from the first section into the antenna base plate 2. The first and second sections correspond to the 1 / 4 wavelength virtual short-circuit mode and the 1 / 2 wavelength virtual short-circuit mode, respectively. The operating frequency of the first section slot antenna is 5.90 GHz, and the operating frequency of the second section slot antenna is 7.35 GHz. This also helps expand the bandwidth of the dual-band WLAN antenna 1000 and improve the operating efficiency of the dual-band WLAN antenna 1000. In addition, the arrangement of the feed hole 322 and the ground hole 312 helps to optimize the current flow path, reduce signal reflection and loss, simplify the manufacturing and assembly process of the antenna, improve the structural stability of the antenna and the reliability of signal transmission, and may also improve the manufacturing accuracy and consistency of the antenna.

[0044] In an optional embodiment, to ensure the working efficiency of the dipole antenna 3, please refer to Figure 1 The first bend 311 and the second bend 321 are both arranged in a stepped shape. The stepped bends provide greater design freedom to accommodate diverse design requirements and frequency characteristics. This helps improve the antenna's bandwidth, achieving wider frequency coverage without sacrificing performance. This enhances the antenna's frequency selectivity and radiation efficiency, while also potentially increasing its versatility, making it adaptable to a wider range of wireless communication applications.

[0045] In an optional embodiment, to improve the impedance matching of the dual-band WLAN antenna 1000, please refer to Figures 1 to 3 , a chamfer is formed at one end of the first dipole branch 31 close to the second dipole branch 32. Chamfers are usually used to reduce sharp edges, which is particularly important in antenna design. Sharp edges may cause unnecessary reflection and loss of signals. In addition, the gap formed between the first dipole branch 31 and the second dipole branch 32 can introduce additional capacitive components in the two frequency bands, thereby achieving the effect of improving impedance matching. By forming a chamfer at one end of the first dipole branch 31 close to the second dipole branch 32, the mutual interference between the first dipole branch 31 and the second dipole branch 32 can be reduced, thereby improving the radiation efficiency of the dual-band WLAN antenna 1000. Reducing the sharp transition between the branches helps to improve the impedance matching of the antenna, improve the performance of the antenna and the signal transmission quality, and also improve the aesthetics and durability of the dual-band WLAN antenna 1000.

[0046] To further improve the impedance matching of the dual-band WLAN antenna 1000, please refer to Figures 1 to 3 The first bend 311 and the second bend 321 are symmetrically arranged along the opening slit 4. A first rectangular notch 21a is formed at the connection between the antenna base 2 and the second dipole branch 32. One side of the first rectangular notch 21a is flush with the inner edge of the second dipole branch 32. The symmetrical design of the first bend 311 and the second bend 321 can reduce performance fluctuations caused by antenna asymmetry, thereby improving the stability and reliability of the antenna. The design of the first rectangular notch 21a can introduce additional capacitive components within the two frequency bands, thereby improving impedance matching. In addition, the provision of the first rectangular notch 21a can also be used to adjust the resonant frequency of the dual-band WLAN antenna 1000. This can affect the current distribution and radiation characteristics of the antenna, helping to improve the antenna's bandwidth characteristics. This allows the dual-band WLAN antenna 1000 to achieve wider frequency band coverage without sacrificing performance, thereby improving overall wireless performance.

[0047] In another optional embodiment, in order to improve the impedance matching of the dual-band WLAN antenna 1000, please refer to Figure 6 The first bend 311 and the second bend 321 are asymmetrically designed. A second rectangular notch 21b is formed at the connection between the antenna ground plane 2 and the first dipole branch 31. One side of the second rectangular notch 21b is parallel to the open slot 4. This asymmetric design provides greater design freedom to meet specific performance requirements. Furthermore, the second rectangular notch 21b introduces an additional capacitive component within both frequency bands, improving impedance matching.

[0048] To further improve the impedance matching of the dual-band WLAN antenna 1000, please refer to Figure 6 The second dipole branch 32 extends laterally away from the first dipole branch 31 to form an open branch 323, located between the second bend 321 and the antenna base plate 2. The open branch 323 provides an additional resonance point or improves the antenna's bandwidth. The open branch 323 introduces a capacitive component into the dual-band WLAN antenna 1000, helping to fine-tune impedance matching and improve the antenna's radiation efficiency.

[0049] For further information, please refer to Figure 6Along the length of slot 4, the width of slot 4 near the chamfered end is smaller than the width of slot 4 away from the chamfered end. The slot antenna is located between the two dipole branches and embedded in antenna baseplate 2. Near the slot antenna opening, it shares some structure with dipole antenna 3, enabling structural reuse and simplifying the overall structure of dual-band WLAN antenna 1000. Varying the width of slot 4 can be used to adjust the antenna's radiation pattern and directivity. Changing the slot width can influence the antenna's current distribution and radiation characteristics.

[0050] The following describes in detail the structural principles of two embodiments of the dual-band WLAN antenna 1000 in this solution.

[0051] Example 1:

[0052] Please refer to Figures 1 to 3 The dual-band WLAN antenna 1000 includes a first dipole branch 31, a second dipole branch 32, an antenna base 2, a feeder line 5, a feed hole 322, a ground hole 312, a dielectric substrate 1, and an opening 4. In this design, the first dipole branch 31, the second dipole branch 32, and the antenna base 2 are all placed on the top surface of the dielectric substrate 1, with the feeder line 5 located below the dielectric substrate 1. The inner conductor 51 of the feeder line 5 is connected to the second dipole branch 32 via the feed hole 322, and the outer conductor 52 of the feeder line 5 is connected to the antenna base 2 via the ground hole 312. The first dipole branch 31 is directly connected to the antenna base 2, and the corner near the connection is chamfered. This design introduces additional capacitive components within both frequency bands, improving impedance matching. The first bend 311 is formed at the end, which adjusts the antenna impedance matching. The second dipole branch 32 is directly connected to the antenna floor 2, and extends and bends at the end to form a second bend 321, which has the effect of adjusting the antenna impedance matching. The slot antenna is located between the two dipole branches and embedded in the floor. It shares part of the structure with the two dipole branches near the slot antenna opening, and has the feature of structural reuse, making the antenna design more compact. The antenna floor 2 has a rectangular structure, and its size can be changed according to the actual application environment. It has a rectangular notch near the root of the second dipole antenna 3 branch. The rectangular notch changes the current path of the antenna floor 2 and can adjust the impedance matching. The first dipole branch 31 and the second dipole branch 32 resonate in the low frequency band (2.38~2.59GHz). There is an open gap 4 between the first dipole branch 31 and the second dipole branch 32. The virtual short-circuit mode of the open gap 4 is introduced by the inner conductor 51 of the feed line 5. The two share some metal structures, and the open gap 4 resonates in the high frequency band (5.01~7.71GHz), including two resonant modes, namely 1 / 4 wavelength virtual short-circuit mode and 1 / 2 wavelength virtual short-circuit mode, which expands the bandwidth of the antenna.

[0053] Figure 7 The S11 simulation results for the dual-band WLAN antenna 1000 in this solution are shown. In the figure, the solid line a and the dashed line b represent the reflection coefficient curves of the dual-band WLAN antenna 1000 before and after the addition of the impedance matching structure (including the horn-shaped opening of the first dipole branch 31 and the rectangular notch in the antenna base 2). The figure shows that after the addition of the impedance matching structure, the dual-band WLAN antenna 1000 has a new resonant zero point in the low-frequency band and also increases its bandwidth in the high-frequency band. Furthermore, the dual-band WLAN antenna 1000 in this design has three resonant modes within the band, covering the 2.38-2.59 GHz and 5.01-7.71 GHz frequency bands, indicating that the dual-band WLAN antenna 1000 in this solution has significantly improved the antenna's bandwidth. Figure 8 FIG. 1 is a curve of the simulated actual gain of the dual-band WLAN antenna 1000 in this solution. As can be seen from the figure, the antenna has a relatively flat gain within the operating frequency band, meeting the requirements of broadband communication. Figure 4 and Figure 5 Schematic diagrams of the electric field distribution of the slot antenna in this scheme at 5.90 GHz and 7.35 GHz, respectively corresponding to the 1 / 4 wavelength virtual short-circuit mode and the 1 / 2 wavelength virtual short-circuit mode, which expands the bandwidth of the antenna.

[0054] Example 2:

[0055] Please refer to Figure 6 The dual-band WLAN antenna 1000 includes a first dipole branch 31, a second dipole branch 32, an antenna base 2, a feed line 5, a feed hole 322, a ground hole 312, a dielectric substrate 1, and an open slot 4. The first bend 311 on the first dipole branch 31 is asymmetrical to the second bend 321 on the second dipole branch 32, and an open branch 323 is added at the connection between the second dipole branch 32 and the antenna base 2 to improve impedance matching. The slot antenna is located between the two dipole branches and embedded in the antenna base 2. It shares some structure with the two dipole branches near the slot antenna opening, featuring structural reuse. The tail of the slot antenna is widened to adjust impedance matching. The quality factor of the slot 1 / 2 wavelength mode is reduced to increase the bandwidth of this mode. The antenna base plate 2 is a rectangular structure whose size can be adjusted according to the actual application environment. A rectangular notch is provided near the base of the first dipole branch 31 to adjust impedance matching. The feed line 5 is perpendicular to the slot antenna, allowing simultaneous excitation of both the dipole antenna 3 and the slot antenna, creating a dual-band effect. In the high-frequency band, the slot antenna operates in two modes: a quarter-wavelength virtual short-circuit mode and a half-wavelength virtual short-circuit mode, achieving broadband performance. Figure 9This is the actual test result of the voltage standing wave ratio of Example 2, which can completely cover the 2.4 GHz, 5 GHz, and 6 GHz frequency bands in the WiFi band, meeting the actual application requirements of the dual-band WLAN antenna 1000.

[0056] The present invention also provides a mobile terminal comprising a dual-band WLAN antenna 1000. The dual-band WLAN antenna 1000 of this embodiment is suitable for portable devices such as smartphones, tablet computers, and the like. Integrating this dual-band WLAN antenna 1000 into a mobile terminal can enhance the device's wireless communication capabilities while maintaining its compactness and portability. It also helps improve the efficiency of the mobile terminal by allowing it to effectively communicate across a wider range of frequency bands without the need for additional antennas. The specific structure of the dual-band WLAN antenna 1000 is similar to that of the aforementioned embodiments. Since the dual-band WLAN antenna 1000 utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore, no further details will be given here.

[0057] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dual-band WLAN antenna, characterized in that: include: dielectric substrate; an antenna floor, the antenna floor being arranged on the upper surface of the dielectric substrate; A dipole antenna, the dipole antenna comprising a first dipole branch and a second dipole branch, the first dipole branch and the second dipole branch both being connected to the antenna floor, an open gap being formed between the first dipole branch and the second dipole branch, the length of the open gap being greater than the longitudinal length of the first dipole branch and the second dipole branch, the first dipole branch extending and bending away from the second dipole branch to form a first bending portion, and the second dipole branch extending and bending away from the first dipole branch to form a second bending portion.

2. The dual-band WLAN antenna according to claim 1, wherein: The dual-band WLAN antenna also includes a feeder line, which includes an inner conductor and an outer conductor distributed in a radial direction, wherein the outer conductor is wrapped around the periphery of the inner conductor, the first dipole branch is formed with a grounding hole, and the second dipole branch is formed with a feeding hole, the outer conductor is connected to the antenna ground through the grounding hole, and the inner conductor is connected to the second dipole branch through the feeding hole.

3. The dual-band WLAN antenna according to claim 2, wherein: The grounding hole is provided at a connection position between the first dipole branch and the antenna floor, and the feeding hole is provided at a connection position between the second dipole branch and the antenna floor.

4. The dual-band WLAN antenna according to claim 1, wherein: The first bending portion and the second bending portion are both arranged in a stepped shape.

5. The dual-band WLAN antenna according to any one of claims 1 to 4, wherein: An end of the first dipole branch close to the second dipole branch is chamfered.

6. The dual-band WLAN antenna according to claim 5, wherein: The first bending portion and the second bending portion are symmetrically arranged along the opening gap. A first rectangular notch is formed at the connection portion between the antenna floor and the second dipole branch. One side of the first rectangular notch is flush with the inner edge of the second dipole branch.

7. The dual-band WLAN antenna according to claim 5, wherein: The first bending portion and the second bending portion are asymmetrically designed. A second rectangular notch is formed at the connection portion between the antenna floor and the first dipole branch. One side of the second rectangular notch is parallel to the opening gap.

8. The dual-band WLAN antenna according to claim 7, wherein: The second dipole branch extends laterally in a direction away from the first dipole branch to form an open branch, and the open branch is located between the second bending portion and the antenna floor.

9. The dual-band WLAN antenna according to claim 8, wherein: In the length direction of the opening slit, the width of the opening slit close to the chamfered end is smaller than the width of the opening slit away from the chamfered end.

10. A mobile terminal, characterized in that: The dual-band WLAN antenna comprises the dual-band WLAN antenna according to any one of claims 1 to 9.

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