Dual-band broadband antenna and wearable device

Abstract

The invention discloses a dual-band broadband antenna and wearable equipment, and relates to the technical field of antennae, the dual-band broadband antenna comprises a dielectric substrate, an antenna floor, a monopole antenna and a feed port, the antenna floor is arranged on one side of the dielectric substrate, the antenna floor is of an L-shaped structure, and the monopole antenna is arranged on the dielectric substrate; a notch is formed in the projection position of the antenna floor relative to the dielectric substrate; the monopole antenna is connected to the dielectric substrate and located at the position of the notch, the monopole antenna comprises a first section and a second section, and the length of the first section is larger than that of the second section; the feed port is connected with the monopole antenna and the antenna floor, and the feed port is arranged at the joint of the first section and the second section.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a dual-band broadband antenna and a wearable device. Background Art

[0002] With the rapid development of Internet of Things technology, wearable electronic devices have gradually penetrated into all aspects of people's daily lives. According to their functions, wearable devices can usually be divided into two types: one is a relatively independent mobile terminal, such as smart glasses, smart watches, etc., and the other is an extension of the mobile terminal, used as a sensor to detect the user's physical state. In comparison, the former has higher requirements for the communication capability of the antenna.

[0003] In order to ensure the portability, aesthetics and wearing comfort of wearable devices, wearable devices usually have a very small size and irregular shape, which undoubtedly limits the design space of the antenna. With the rapid development of wireless communications, the number of WiFi bands is increasing, including multiple bands such as 2.4G / 5G / 6G, and the bandwidth is also getting wider. In order to be compatible with different standards in various countries and cover existing WiFi bands, the new generation of WLAN antennas need to have the characteristics of broadband and multi-band. However, the existing antenna design schemes all have the problem of large overall antenna size, which makes it difficult to meet the two requirements of miniaturization and broadband at the same time. Therefore, how to set a broadband WLAN antenna on a small-sized wearable device needs to be solved urgently. Summary of the invention

[0004] The main purpose of the present invention is to provide a dual-band broadband antenna and a wearable device, aiming to achieve the broadband antenna to expand the bandwidth of the antenna within a smaller installation size.

[0005] To achieve the above object, the dual-band broadband antenna proposed in the present invention comprises:

[0006] dielectric substrate;

[0007] An antenna floor, the antenna floor is arranged on one side of the dielectric substrate, the antenna floor is in an L-shaped structure, and a notch is formed at a projection position of the antenna floor relative to the dielectric substrate;

[0008] A monopole antenna, the monopole antenna is connected to the dielectric substrate and is located at the notch, the monopole antenna includes a first section and a second section, and the length of the first section is greater than the length of the second section;

[0009] A feeding port is provided, wherein the feeding port connects the monopole antenna and the antenna floor, and the feeding port is provided at the connection between the first section and the second section.

[0010] In one embodiment, the monopole antenna is arranged in a U shape and is transversely arranged at the notch position along the length direction of the antenna floor, and the feeding port is arranged on a side of the monopole antenna close to the antenna floor.

[0011] In one embodiment, the antenna floor is close to one end of the monopole antenna in the length direction and extends along the width direction of the antenna floor to form a protrusion structure, and the protrusion structure is coupled with the monopole antenna.

[0012] In one embodiment, the dual-band broadband antenna further includes a coupling metal sheet, which is disposed on a side of the dielectric substrate facing away from the antenna floor, and the coupling metal sheet corresponds to a projection position of the monopole antenna on the dielectric substrate.

[0013] In one embodiment, the dielectric substrate is a regularly shaped rectangular structure, and the edge of the antenna floor is flush with the outer edge of the dielectric substrate.

[0014] In one embodiment, the dielectric substrate is an irregular trapezoid, and the edge of the antenna floor is flush with the outer edge of the dielectric substrate.

[0015] In one embodiment, the antenna floor comprises two pieces, and each of the antenna floor is disposed on two opposite sides of the dielectric substrate.

[0016] In one embodiment, each of the antenna floors is formed with a plurality of short-circuit via holes, and the short-circuit via holes of the two antenna floors correspond to each other.

[0017] In one embodiment, the monopole antenna has an arc-shaped bending structure.

[0018] The present invention further provides a wearable device, the wearable device comprising a dual-band broadband antenna, the dual-band broadband antenna comprising:

[0019] dielectric substrate;

[0020] An antenna floor, the antenna floor is arranged on one side of the dielectric substrate, the antenna floor is in an L-shaped structure, and a notch is formed at a projection position of the antenna floor relative to the dielectric substrate;

[0021] A monopole antenna, the monopole antenna is connected to the dielectric substrate and is located at the notch, the monopole antenna includes a first section and a second section, and the length of the first section is greater than the length of the second section;

[0022] A feeding port is provided, wherein the feeding port connects the monopole antenna and the antenna floor, and the feeding port is provided at the connection between the first section and the second section.

[0023] The technical solution of the present invention proposes a dual-band broadband antenna, which specifically includes a dielectric substrate, an antenna floor, a monopole antenna and a feeding port. The L-shaped structure and notch design of the antenna floor provide an effective installation position for the monopole antenna. At the same time, the presence of the notch helps to reduce the size of the dual-band broadband antenna while maintaining its performance. The monopole antenna is composed of two sections of different lengths. This design helps to adjust the resonant frequency of the antenna to cover a wider operating frequency band. The feeding port is located at the connection of the monopole antenna, which helps to improve the efficiency of energy transmission and reduce losses, and impedance matching can be achieved without adding lumped elements, thereby improving the overall working efficiency of the dual-band broadband antenna. The dual-band broadband antenna in this solution achieves a wide-bandwidth frequency response while maintaining a small size, so as to facilitate the antenna installation design of small-sized wearable devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0025] Figure 1 A top view of a dual-band broadband antenna embodiment 1 provided by the present invention;

[0026] Figure 2 for Figure 1 A bottom view of the medium dual-band broadband antenna embodiment 1;

[0027] Figure 3 for Figure 1 A side view of a medium dual-band broadband antenna embodiment 1;

[0028] Figure 4 for Figure 1 A rear view of the medium dual-band broadband antenna embodiment 1;

[0029] Figure 5 A top view of a dual-band broadband antenna embodiment 2 provided by the present invention;

[0030] Figure 6 for Figure 5 A bottom view of the medium dual-band broadband antenna embodiment 2;

[0031] Figure 7 A schematic diagram of the S11 simulation results of the dual-band broadband antenna provided by the present invention;

[0032] Figure 8 A schematic diagram of a simulated efficiency curve of the dual-band broadband antenna provided by the present invention;

[0033] Fig. 9 It is a schematic diagram of the actual test results of the voltage standing wave ratio of Example 2 of the dual-band broadband antenna of the present invention.

[0034] Description of Figure Numbers:

[0035] 1000. Dual-band broadband antenna; 1. Dielectric substrate; 2. Antenna floor; 21. Protrusion structure; 22. Short-circuit via; 3. Monopole antenna; 31. First section; 32. Second section; 4. Feed port; 5. Coupling metal sheet.

[0036] 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

[0037] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0038] 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 indication will also change accordingly.

[0039] 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. 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 contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] With the rapid development of Internet of Things technology, wearable electronic devices have gradually penetrated into all aspects of people's daily lives. According to their functions, wearable devices can usually be divided into two types: one is a relatively independent mobile terminal, such as smart glasses, smart watches, etc., and the other is an extension of the mobile terminal, used as a sensor to detect the user's physical state. In comparison, the former has higher requirements for the communication capability of the antenna.

[0041] In order to ensure the portability, aesthetics and wearing comfort of wearable devices, wearable devices usually have a very small size and irregular shape, which undoubtedly limits the design space of the antenna. With the rapid development of wireless communications, the number of WiFi bands is increasing, including multiple bands such as 2.4G / 5G / 6G, and the bandwidth is also getting wider. In order to be compatible with different standards in various countries and cover existing WiFi bands, the new generation of WLAN antennas need to have the characteristics of broadband and multi-band. However, the existing antenna design schemes all have the problem of large overall antenna size, which makes it difficult to meet the two requirements of miniaturization and broadband at the same time. Therefore, how to set a broadband WLAN antenna on a small-sized wearable device needs to be solved urgently.

[0042] To solve the above problems, please refer to Figures 1 to 9 The present invention proposes a dual-band broadband antenna 1000, comprising a dielectric substrate 1, an antenna floor 2, a monopole antenna 3 and a feeding port 4, wherein the antenna floor 2 is arranged on one side of the dielectric substrate 1, the antenna floor 2 is in an L-shaped structure, and a notch is formed at the projection position of the antenna floor 2 relative to the dielectric substrate 1; the monopole antenna 3 is connected to the dielectric substrate 1 and is located at the notch position, wherein the monopole antenna 3 includes a first section 31 and a second section 32, and the length of the first section 31 is greater than the length of the second section 32; the feeding port 4 connects the monopole antenna 3 and the antenna floor 2, and the feeding port 4 is arranged at the connection between the first section 31 and the second section 32.

[0043] The technical solution of the present invention proposes a dual-band broadband antenna 1000, which specifically includes a dielectric substrate 1, an antenna floor 2, a monopole antenna 3 and a feeding port 4. The L-shaped structure and notch design of the antenna floor 2 provide an effective installation position for the monopole antenna 3. At the same time, the presence of the notch helps to reduce the size of the dual-band broadband antenna 1000 while maintaining its performance. The monopole antenna 3 is composed of two sections of different lengths. This design helps to adjust the resonant frequency of the antenna, thereby covering a wider operating frequency band. The feeding port 4 is located at the connection of the monopole antenna 3, which helps to improve the efficiency of energy transmission and reduce losses, and impedance matching can be achieved without adding lumped elements, thereby improving the overall working efficiency of the dual-band broadband antenna 1000. The dual-band broadband antenna 1000 in this solution achieves a wide bandwidth frequency response while maintaining a small size, so as to facilitate the antenna installation design of small-sized wearable devices.

[0044] In an optional embodiment, in order to facilitate the installation of the monopole antenna 3 and take into account the installation space and working bandwidth of the monopole antenna 3, the monopole antenna 3 is arranged in a U shape and is arranged at the notch position transversely along the length direction of the antenna floor 2, and the feeding port 4 is arranged on the side of the monopole antenna 3 close to the antenna floor 2. Please refer to Figure 1 , the monopole antenna 3 is set to be U-shaped and placed horizontally along the length direction of the antenna floor 2. It helps to optimize the radiation pattern of the antenna and improve its directivity, thereby providing better signal transmission in a specific direction. In addition, the feeding port 4 is set on the side of the monopole antenna 3 close to the antenna floor 2, which helps to change the impedance matching of the dual-band broadband antenna 1000, thereby affecting the working bandwidth of the antenna. By setting the feeding port 4 at the connection position of the first section 31 and the second section 32, the first section 31 and the second section 32 share a feeding port 4, and the lengths of the first section 31 and the second section 32 are different, so that the two act on different working frequencies, which simplifies the installation structure of the dual-band broadband antenna 1000 and expands the bandwidth of the dual-band broadband antenna 1000. A compact and efficient antenna solution is provided, which is suitable for application scenarios where the antenna installation space is limited, such as wearable devices such as smart glasses and smart watches, as well as portable electronic devices such as smart phones and tablets.

[0045] In an optional embodiment, in order to facilitate the adjustment of the coupling strength between the monopole antenna 3 and the antenna floor 2, the antenna floor 2 is close to one end of the monopole antenna 3 in the length direction, and extends along the width direction of the antenna floor 2 to form a protrusion structure 21, and the protrusion structure 21 is coupled with the monopole antenna 3. Please refer to Figure 1 , the protrusion structure 21 extends along the width direction of the antenna floor 2 and is coupled with the monopole antenna 3. This protrusion structure 21 can enhance the electromagnetic performance of the antenna. The distance between the protrusion structure 21 and the right end of the monopole antenna 3 can be changed by adjusting the size of the protrusion structure 21, thereby adjusting the coupling strength between the antenna floor 2 and the right end of the monopole antenna 3, thereby improving the transmission and reception of electromagnetic wave signals. In addition, in order to further adjust the coupling strength between the antenna floor 2 and the monopole antenna 3, the dual-band broadband antenna 1000 also includes a coupling metal sheet 5. The coupling metal sheet 5 is arranged on the side of the dielectric substrate 1 facing away from the antenna floor 2, and the coupling metal sheet 5 corresponds to the projection position of the monopole antenna 3 on the dielectric substrate 1. Please refer to Figures 1 to 4, the coupling metal sheet 5 is located on the other side of the dielectric substrate 1, corresponding to the projection position of the monopole antenna 3 on the dielectric substrate 1, and close to the end of the antenna floor 2 facing away from the protruding structure 21. By adjusting the spacing between the coupling metal sheet 5 and the antenna floor 2, the coupling strength between the antenna floor 2 and the left end of the monopole antenna 3 can be adjusted to improve the transmission and reception of electromagnetic wave signals. Specifically, the spacing between the coupling metal sheet 5 and the antenna floor 2 can be adjusted by changing the thickness of the dielectric substrate 1 or by changing the spacing between the coupling metal sheet 5 and the antenna floor 2 in the length direction. In summary, the provision of the coupling metal sheet 5 helps to improve the radiation efficiency of the dual-band broadband antenna 1000 and enhances signal transmission through interaction with the monopole antenna 3. The performance of the dual-band broadband antenna 1000 is improved while maintaining the compactness and aesthetics of the dual-band broadband antenna 1000. By coupling the metal sheet 5 and the protruding structure 21 provided on the antenna floor 2, the coupling strength between the monopole antenna 3 and the antenna floor 2 can be adjusted together. Appropriate coupling strength can make the resonant frequencies of multiple radiation modes close to each other, achieving a broadband effect.

[0046] In an optional embodiment, in order to adapt the dual-band broadband antenna 1000 to installations in different usage scenarios, the dielectric substrate 1 may be a regularly shaped rectangular structure, or the dielectric substrate 1 may be an irregular trapezoid, and the edge of the antenna floor 2 may be flush with the outer edge of the dielectric substrate 1. These different shape designs may adapt to different installation environments and space requirements. A regular rectangular dielectric substrate 1 may help simplify the manufacturing process, while an irregular trapezoidal dielectric substrate 1 may provide more design flexibility to accommodate specific installation spaces or aesthetic requirements. The edge of the antenna floor 2 is flush with the outer edge of the dielectric substrate 1, which helps maintain a neat appearance of the antenna and may also help improve the performance of the antenna because the alignment of the edges may help reduce signal reflection and scattering.

[0047] In an optional embodiment, in order to facilitate the installation of the dual-band broadband antenna 1000, the antenna floor 2 includes two pieces, each of which is disposed on opposite sides of the dielectric substrate 1, and each antenna floor 2 is formed with a plurality of short-circuit vias 22, and the short-circuit vias 22 of the two antenna floors 2 correspond to each other. Figure 5 and Figure 6 , the antenna floor 2 is divided into two pieces and arranged on opposite sides of the dielectric substrate 1. This helps to improve the symmetry and balance of the antenna, thereby optimizing the radiation pattern and performance of the dual-band broadband antenna 1000. In addition, the short-circuit via 22 can fully connect the antenna floors 2 on both sides to reduce the generation of interference patterns. At the same time, the antenna floors 2 on both sides increase the area for deploying other electronic components, which helps the wearable device to achieve more complex functions. It is convenient to design and install high-performance antennas in a limited space.

[0048] In an optional embodiment, in order to achieve fine-tuning of the dual-band broadband antenna 1000, the monopole antenna 3 has an arc-shaped bending structure. By setting the bending structure, the electrical length of the antenna can be changed, thereby adjusting its resonant frequency. The method of fine-tuning the antenna performance by adjusting the physical structure is adopted to enable it to adapt to different operating frequency bands. It is convenient for the dual-band broadband antenna 1000 to achieve a wide bandwidth frequency response while maintaining a small physical size.

[0049] The structural principles of the two embodiments in this solution are described in detail below.

[0050] Embodiment 1:

[0051] Please refer to Figures 1 to 4 The dual-band broadband antenna 1000 includes three parts: a monopole antenna 3, an antenna floor 2, and a coupling metal sheet 5. The monopole antenna 3 is located on the first side of the dielectric substrate 1 and is in the shape of a U-shaped folded branch. The folded form can make the design of the monopole antenna 3 more compact. A feeding port 4 is provided on the lower side of the branch for connecting the radio frequency circuit. The design can excite the branches on the left and right sides of the feeding port 4 respectively, so that the folded branches form two antennas of different lengths on the left and right under electromagnetic excitation, thereby introducing resonant modes in the high frequency band and the low frequency band respectively, achieving the dual-band effect and improving the bandwidth of the antenna. The antenna floor 2 is also located on the first side of the dielectric substrate 1, on the same layer as the monopole antenna 3, and is roughly L-shaped. The monopole antenna 3 is located in the notch in the upper right corner of the antenna floor 2. There is a rectangular protrusion structure 21 on the right side of the monopole antenna 3. By changing the distance between the protrusion structure 21 and the monopole antenna 3, the coupling strength between the right end of the antenna floor 2 and the monopole antenna 3 can be adjusted to improve impedance matching. The coupling metal sheet 5 is located on a second side surface opposite to the one side surface of the dielectric substrate 1, and corresponds to the bending portion of the monopole antenna 3. By adjusting the distance between the coupling metal sheet 5 and the antenna floor 2 in the length direction, the coupling strength between the monopole antenna 3 and the left end of the antenna floor 2 can be adjusted.

[0052] Figure 7The S11 simulation results of the dual-band broadband antenna 1000 in this solution are shown. In the figure, the dotted line a represents the reflection coefficient curve when the protruding structure 21 on the antenna floor 2 and the coupling metal sheet 5 are not set, the dashed line b represents the reflection coefficient curve when the protruding structure 21 is set on the antenna floor 2 but the coupling metal sheet 5 is not added, and the solid line c represents the reflection coefficient curve of the antenna after the protruding structure 21 on the antenna floor 2 and the coupling metal sheet 5 are added. It can be seen from the figure that with the addition of the protruding structure 21 on the antenna floor 2 and the coupling metal sheet 5, the resonant mode of the curve in the high frequency band is gradually approached, and the impedance matching is improved. Finally, the designed dual-band broadband antenna 1000 can cover 2.37~2.88GHz in the low frequency band and 4.42~7.26GHz in the high frequency band, with relative bandwidths of 19.4% and 48.6% respectively, and has broadband effects in both frequency bands. It can cover the 2.4GHz, 5GHz, and 6GHz frequency bands involved in WiFi1 to WiFi7 technologies, and has the advantages of low clearance height, simple feeding structure, high working efficiency and small overall size. Figure 8 This is the efficiency curve of the simulation of the dual-band broadband antenna 1000 in this solution. The efficiency of the antenna is stable within the working frequency band and is better than -1dB, which meets the actual application requirements.

[0053] Embodiment 2:

[0054] Please refer to Figures 5 and 6, the dual-band broadband antenna 1000 includes three parts: a monopole antenna 3, an antenna floor 2, and a coupling metal sheet 5. The dual-band broadband antenna 1000 includes three parts: a monopole antenna 3, an antenna floor 2, and a coupling metal sheet 5. The monopole antenna 3 is located on the first side of the dielectric substrate 1, and is in the shape of a U-shaped folded branch, and an arc-shaped bending structure is formed on both branches to facilitate fine-tuning of the monopole antenna 3. The folding form can make the design of the monopole antenna 3 more compact. A feeding port 4 is provided on the lower side of the branch for connecting to the radio frequency circuit. This design can excite the branches on the left and right sides of the feeding port 4 respectively, so that the folded branches form two antennas of different lengths on the left and right under electromagnetic excitation, thereby introducing resonant modes in the high frequency band and the low frequency band respectively, achieving the dual-band effect, and improving the bandwidth of the antenna. The two antenna floors 2 are respectively located on the first side and the opposite second side of the dielectric substrate 1. The antenna floors 2 on both sides have the same shape and are fully connected in the middle through a short-circuit via 22. The shape of the antenna floor 2 is roughly a quadrilateral with missing corners, which is suitable for installation in the temples of smart glasses. The monopole antenna 3 is located in the notch in the upper right corner of the antenna floor 2. There is a rectangular protrusion on the right floor of the monopole antenna 3, which is used to adjust the coupling strength between the right antenna floor 2 and the monopole antenna 3. The coupling metal sheet 5 is located on the second side of the dielectric substrate 1 and is correspondingly arranged at the bending part of the monopole antenna 3. Adjusting the distance between the coupling metal sheet 5 and the antenna floor 2 can adjust the coupling strength between the monopole antenna 3 and the left antenna floor 2.

[0055] Fig. 9 This is the actual test result of the voltage standing wave ratio of Example 2 of this scheme. It can be seen from the figure that the standing wave ratio of the dual-band broadband antenna 1000 in the 2.4GHz, 5GHz, and 6GHz bands is all close to 1, indicating that the dual-band broadband antenna 1000 has smaller reflection and better matching, which can meet the actual application needs of the product.

[0056] In summary, this solution can simultaneously excite the working modes of the monopole antenna 3 and the antenna floor 2 through a feeding port 4, and can control the coupling strength and impedance matching between these working modes by adjusting the size of the monopole antenna 3, the size of the antenna floor 2, the position of the coupling metal sheet 5 and the size of the protrusion structure 21. The antenna can cover 2.37~2.88GHz in the low frequency band and 4.42~7.26GHz in the high frequency band, with relative bandwidths of 19.4% and 48.6% respectively, and has a broadband effect. In addition, the dual-band broadband antenna 1000 has a low clearance height, and the overall volume of the antenna is only 44.5*5.5*0.8mm3. The shape of the antenna is long and narrow, which is very suitable for products such as smart glasses. And the feeding structure in this solution does not contain lumped elements and therefore has a higher working efficiency.

[0057] The present invention further provides a wearable device, which includes a dual-band broadband antenna 1000. Specifically, the wearable device can be an electronic device such as smart glasses, smart watches, etc. The specific structure of the dual-band broadband antenna 1000 refers to the above embodiment. Since the wearable device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0058] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention and the drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dual-band broadband antenna, characterized in that: include: dielectric substrate; An antenna floor, the antenna floor is arranged on one side of the dielectric substrate, the antenna floor is in an L-shaped structure, and a notch is formed at a projection position of the antenna floor relative to the dielectric substrate; A monopole antenna, the monopole antenna is connected to the dielectric substrate and is located at the notch, the monopole antenna includes a first section and a second section, and the length of the first section is greater than the length of the second section; A feeding port is provided, wherein the feeding port connects the monopole antenna and the antenna floor, and the feeding port is provided at the connection between the first section and the second section.

2. The dual-band broadband antenna according to claim 1, characterized in that: The monopole antenna is arranged in a U shape and is transversely arranged at the notch position along the length direction of the antenna floor, and the feeding port is arranged on a side of the monopole antenna close to the antenna floor.

3. The dual-band broadband antenna according to claim 2, characterized in that: The antenna floor is close to one end of the monopole antenna in the length direction and extends along the width direction of the antenna floor to form a protrusion structure, and the protrusion structure is coupled with the monopole antenna.

4. The dual-band broadband antenna according to any one of claims 1 to 3, characterized in that: The dual-band broadband antenna further comprises a coupling metal sheet, which is arranged on a side of the dielectric substrate facing away from the antenna floor, and the coupling metal sheet corresponds to a projection position of the monopole antenna on the dielectric substrate.

5. The dual-band broadband antenna according to claim 4, characterized in that: The dielectric substrate is a rectangular structure with a regular shape, and the edge of the antenna floor is flush with the outer edge of the dielectric substrate.

6. The dual-band broadband antenna according to claim 4, characterized in that: The dielectric substrate is an irregular trapezoid, and the edge of the antenna floor is flush with the outer edge of the dielectric substrate.

7. The dual-band broadband antenna according to claim 6, characterized in that: The antenna floor comprises two pieces, and each of the antenna floor is arranged on two opposite sides of the dielectric substrate.

8. The dual-band broadband antenna according to claim 7, characterized in that: Each of the antenna floors is formed with a plurality of short-circuit via holes, and the short-circuit via holes of the two antenna floors correspond to each other.

9. The dual-band broadband antenna according to claim 7, characterized in that: The monopole antenna has an arc-shaped bending structure.

10. A wearable device, characterized in that: The invention comprises a dual-band broadband antenna as claimed in any one of claims 1 to 9.

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