Dual-band broadband antenna and wearable device

Abstract

The utility model discloses a dual-band broadband antenna and a wearable device, 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 at one side of the dielectric substrate, the antenna floor is of an L-shaped structure, and the monopole antenna is arranged at the other side of 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 utility model relates to the technical field of antennas, and in particular to a dual-band broadband antenna and a wearable device. Background Art

[0002] With the rapid development of the Internet of Things (IoT), wearable electronic devices have gradually permeated every aspect of our daily lives. Based on their functionality, wearable devices can be generally divided into two types: relatively independent mobile terminals, such as smart glasses and smart watches, and the other type, which serve as extensions of mobile terminals and act as sensors to detect the user's physical condition. In comparison, the former places higher demands on the communication capabilities of the antenna.

[0003] To ensure the portability, aesthetics, and comfort of wearable devices, they typically have very small sizes and irregular shapes, which undoubtedly limits the design space for antennas. With the rapid development of wireless communications, the number of WiFi frequency bands has increased, including 2.4G / 5G / 6G and other frequency bands, and the bandwidth has also become increasingly wider. To be compatible with the different standards of various countries and cover existing WiFi frequency bands, the next generation of WLAN antennas needs to have broadband and multi-band characteristics. However, existing antenna designs all suffer from the problem of large overall antenna size, making it difficult to simultaneously meet the requirements of miniaturization and broadband. Therefore, how to install a broadband WLAN antenna on a small wearable device is an urgent problem. Utility Model Content

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

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

[0006] dielectric substrate;

[0007] An antenna floor, the antenna floor being provided on one side of the dielectric substrate, the antenna floor being L-shaped, and having a notch formed at a projection position of the antenna floor relative to the dielectric substrate;

[0008] a monopole antenna connected to the dielectric substrate and located at the notch, the monopole antenna comprising a first section and a second section, the first section being longer than the second section;

[0009] A feeding port is connected to 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 laterally disposed at the notch along the length direction of the antenna floor, and the feeding port is disposed 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 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 antenna floor is formed with a plurality of short-circuit vias, and the short-circuit vias 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 being provided on one side of the dielectric substrate, the antenna floor being L-shaped, and having a notch formed at a projection position of the antenna floor relative to the dielectric substrate;

[0021] a monopole antenna connected to the dielectric substrate and located at the notch, the monopole antenna comprising a first section and a second section, the first section being longer than the second section;

[0022] A feeding port is connected to 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 utility model 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 parts of different lengths. This design helps to adjust the resonant frequency of the antenna, thereby covering 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. It can also achieve impedance matching 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 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.

[0025] Figure 1 A top view of Example 1 of the dual-band broadband antenna provided by the present utility model;

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

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

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

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

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

[0031] Figure 7 Schematic diagram of the S11 simulation results of the dual-band broadband antenna provided by the utility model;

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

[0033] Figure 9 This is a schematic diagram of the voltage standing wave ratio actual test results of Example 2 of the dual-band broadband antenna of the present utility model.

[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 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 creative efforts shall fall 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 indications 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 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.

[0040] With the rapid development of the Internet of Things (IoT), wearable electronic devices have gradually permeated every aspect of our daily lives. Based on their functionality, wearable devices can be generally divided into two types: relatively independent mobile terminals, such as smart glasses and smart watches, and the other type, which serve as extensions of mobile terminals and act as sensors to detect the user's physical condition. In comparison, the former places higher demands on the communication capabilities of the antenna.

[0041] To ensure the portability, aesthetics, and comfort of wearable devices, they typically have very small sizes and irregular shapes, which undoubtedly limits the design space for antennas. With the rapid development of wireless communications, the number of WiFi frequency bands has increased, including 2.4G / 5G / 6G and other frequency bands, and the bandwidth has also become increasingly wider. To be compatible with the different standards of various countries and cover existing WiFi frequency bands, the next generation of WLAN antennas needs to have broadband and multi-band characteristics. However, existing antenna designs all suffer from the problem of large overall antenna size, making it difficult to simultaneously meet the requirements of miniaturization and broadband. Therefore, how to install a broadband WLAN antenna on a small wearable device is an urgent problem.

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

[0043] The technical solution of the present utility model proposes a dual-band broadband antenna 1000, which specifically includes a dielectric substrate 1, an antenna floor 2, a monopole antenna 3, and a feed port 4. The L-shaped structure and notch design of the antenna floor 2 provide an effective installation location 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 parts of different lengths. This design helps to adjust the resonant frequency of the antenna, thereby covering a wider operating frequency band. The feed port 4 is located at the connection of the monopole antenna 3, which helps to improve the efficiency of energy transmission and reduce losses. It can also achieve impedance matching 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, which facilitates 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 set in a U shape and is arranged at the notch position along the length direction of the antenna base 2, and the feeding port 4 is arranged on the side of the monopole antenna 3 close to the antenna base 2. Please refer to Figure 1 The monopole antenna 3 is configured in a U-shape and placed horizontally along the length of the antenna floor 2. This helps optimize the antenna's radiation pattern and improve its directivity, thereby providing better signal transmission in a specific direction. In addition, the feed port 4 is located on the side of the monopole antenna 3 close to the antenna floor 2, which helps change the impedance matching of the dual-band broadband antenna 1000, thereby affecting the antenna's operating bandwidth. By arranging the feed 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 feed port 4. The lengths of the first section 31 and the second section 32 are different, so that the two operate at different operating frequencies. This 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 antenna installation space is limited, such as wearable devices such as smart glasses and smart watches, as well as portable electronic devices such as smartphones and tablets.

[0045] In an optional embodiment, in order to facilitate adjustment of the coupling strength between the monopole antenna 3 and the antenna floor 2, a protrusion structure 21 is formed at one end of the antenna floor 2 close to the monopole antenna 3 in the length direction and extending along the width direction of the antenna floor 2. The protrusion structure 21 is coupled to the monopole antenna 3. Figure 1, the protruding structure 21 extends along the width direction of the antenna floor 2 and is coupled with the monopole antenna 3. This protruding structure 21 can enhance the electromagnetic performance of the antenna. The distance between the protruding structure 21 and the right end of the monopole antenna 3 can be changed by adjusting the size of the protruding 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 facilitate further adjustment of 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 provided on the side of the dielectric substrate 1 facing away from the antenna floor 2. 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 plate 5 is located on the other side of the dielectric substrate 1, corresponding to the projected position of the monopole antenna 3 on the dielectric substrate 1, and is close to the end of the antenna floor 2 facing away from the protruding structure 21. By adjusting the spacing between the coupling metal plate 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, thereby improving the transmission and reception of electromagnetic wave signals. Specifically, the spacing between the coupling metal plate 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 plate 5 and the antenna floor 2 in the longitudinal direction. In summary, the provision of the coupling metal plate 5 helps improve the radiation efficiency of the dual-band broadband antenna 1000 and enhances signal transmission through interaction with the monopole antenna 3. This improves the performance of the dual-band broadband antenna 1000 while maintaining its compactness and aesthetics. 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. 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, to adapt the dual-band broadband antenna 1000 to different installation scenarios, the dielectric substrate 1 can be a regular rectangular structure, or alternatively, the dielectric substrate 1 can be a trapezoidal shape, with the edges of the antenna ground plane 2 flush with the outer edges of the dielectric substrate 1. These different shape designs can accommodate different installation environments and space requirements. A regular rectangular dielectric substrate 1 may help simplify the manufacturing process, while a trapezoidal shape may provide greater design flexibility to accommodate specific installation spaces or aesthetic requirements. The flush edges of the antenna ground plane 2 with the outer edges of the dielectric substrate 1 help maintain the antenna's clean appearance and may also improve antenna performance, as the edge alignment may help reduce signal reflection and scattering.

[0047] In an optional embodiment, to facilitate the installation of the dual-band broadband antenna 1000, the antenna floor 2 includes two pieces, each of which is located on opposite sides of the dielectric substrate 1. Each antenna floor 2 is formed with multiple 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 ground plane 2 is divided into two sections, one on each side of the dielectric substrate 1. This helps improve the antenna's symmetry and balance, thereby optimizing the radiation pattern and performance of the dual-band broadband antenna 1000. Furthermore, the short-circuit vias 22 ensure full connection between the two antenna ground planes 2, reducing interference patterns. The addition of antenna ground planes 2 on both sides also increases the area available for other electronic components, enabling wearable devices to achieve more complex functionality. This facilitates the design and installation of high-performance antennas within limited space.

[0048] In an optional embodiment, to enable fine-tuning of the dual-band broadband antenna 1000, the monopole antenna 3 has an arc-shaped flexural structure. This flexural structure can change the antenna's electrical length, thereby adjusting its resonant frequency. This method of fine-tuning antenna performance through physical structural adjustment allows it to adapt to different operating frequency bands. This facilitates 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] Example 1:

[0051] Please refer to Figures 1 to 4The dual-band broadband antenna 1000 comprises a monopole antenna 3, an antenna floor 2, and a coupling metal plate 5. The monopole antenna 3 is located on the first side of the dielectric substrate 1 and is shaped like a U-shaped folded branch. This folded structure allows for a more compact design. A feed port 4 is provided on the underside of the branch for connecting to the RF circuit. This design allows for electromagnetic excitation of the branches on either side of the feed port 4, forming two antenna segments of different lengths on the left and right sides. This creates resonant modes in the high and low frequency bands, achieving a dual-band effect and increasing the antenna's bandwidth. 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. It is roughly L-shaped and located within the notch in the upper right corner of the antenna floor 2. A rectangular protrusion 21 is located on the right side of the monopole antenna 3. By varying the distance between the protrusion 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, improving impedance matching. Coupling metal plate 5 is located on a second side surface, opposite the first side surface of dielectric substrate 1, and corresponds to the bend of monopole antenna 3. By adjusting the distance between coupling metal plate 5 and antenna baseplate 2 along its length, the coupling strength between monopole antenna 3 and the left end of antenna baseplate 2 can be adjusted.

[0052] Figure 7 The S11 simulation results for the dual-band broadband antenna 1000 in this solution are shown. In the figure, the dotted line a represents the reflection coefficient curve without the protruding structure 21 on the antenna base plate 2 and the coupling metal plate 5. The dashed line b represents the reflection coefficient curve with the protruding structure 21 on the antenna base plate 2 but without the coupling metal plate 5. The solid line c represents the reflection coefficient curve with the protruding structure 21 and the coupling metal plate 5 added. As can be seen from the figure, with the addition of the protruding structure 21 on the antenna base plate 2 and the coupling metal plate 5, the resonant modes in the high-frequency band gradually converge, and the impedance matching improves. Ultimately, the designed dual-band broadband antenna 1000 can cover the low-frequency band from 2.37 to 2.88 GHz and the high-frequency band from 4.42 to 7.26 GHz, with relative bandwidths of 19.4% and 48.6%, respectively, demonstrating broadband performance 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 simulated efficiency curve of the dual-band broadband antenna 1000 in this solution. The antenna has a stable efficiency within the operating frequency band and is better than -1dB, meeting actual application requirements.

[0053] Example 2:

[0054] Please refer to Figures 5 and 6The dual-band broadband antenna 1000 comprises three components: a monopole antenna 3, an antenna ground plane 2, and a coupling metal plate 5. The monopole antenna 3 is located on the first side of the dielectric substrate 1 and is shaped like a U-shaped folded branch. Both branches have curved bends to facilitate fine-tuning of the monopole antenna 3. This folded structure allows for a more compact design. A feed port 4 is provided on the underside of the branch for connecting to the RF circuit. This design excites the branches on the left and right sides of the feed port 4, allowing the folded branches to form two antennas of different lengths under electromagnetic excitation. This creates resonant modes in the high and low frequency bands, achieving a dual-band effect and increasing the antenna's bandwidth. Two antenna ground planes 2 are located on the first side and the opposing second side of the dielectric substrate 1, respectively. The antenna ground planes 2 on both sides are identical in shape and are fully connected by a short-circuit via 22. The antenna baseplate 2 is roughly shaped like a square with missing corners, making it suitable for installation in the temples of smart glasses. The monopole antenna 3 is located within the notch in the upper right corner of the antenna baseplate 2. A rectangular protrusion on the right side of the monopole antenna 3 adjusts the coupling strength between the right antenna baseplate 2 and the monopole antenna 3. A coupling metal plate 5 is located on the second side of the dielectric substrate 1, corresponding to the bend of the monopole antenna 3. Adjusting the distance between the coupling metal plate 5 and the antenna baseplate 2 adjusts the coupling strength between the monopole antenna 3 and the left antenna baseplate 2.

[0055] Figure 9 This is the actual test result of the voltage standing wave ratio of Example 2 of this solution. 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 close to 1, indicating that the dual-band broadband antenna 1000 has small reflection and good matching, which can meet the actual application requirements 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 single feed 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 protruding structure 21. The antenna can cover 2.37 to 2.88 GHz in the low frequency band and 4.42 to 7.26 GHz in the high frequency band, with relative bandwidths of 19.4% and 48.6%, respectively, demonstrating a broadband effect. In addition, this dual-band broadband antenna 1000 has a low headroom height, and the overall volume of the antenna is only 44.5*5.5*0.8 mm3. The antenna is long and narrow, making it ideal for products such as smart glasses. Furthermore, the feeding structure in this solution does not contain lumped elements, resulting in higher operating efficiency.

[0057] The present invention also provides a wearable device including a dual-band broadband antenna 1000. Specifically, the wearable device can be an electronic device such as smart glasses or a smartwatch. The specific structure of the dual-band broadband antenna 1000 is similar to the above-described embodiments. Since the present wearable device utilizes all the technical solutions of all the above-described embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be further elaborated here.

[0058] 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 broadband antenna, characterized in that: include: dielectric substrate; An antenna floor, the antenna floor being provided on one side of the dielectric substrate, the antenna floor being L-shaped, and having a notch formed at a projection position of the antenna floor relative to the dielectric substrate; a monopole antenna connected to the dielectric substrate and located at the notch, the monopole antenna comprising a first section and a second section, the first section being longer than the second section; A feeding port is connected to 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, wherein: 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. 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, wherein: 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, wherein: The dual-band broadband antenna further includes a coupling metal sheet, which is arranged on a side of the dielectric substrate facing away from the antenna floor, and corresponds to a projection position of the monopole antenna on the dielectric substrate.

5. The dual-band broadband antenna according to claim 4, wherein: 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.

6. The dual-band broadband antenna according to claim 4, wherein: The dielectric substrate is an irregular quadrilateral, 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, wherein: 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, wherein: Each antenna floor 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, wherein: The monopole antenna has an arc-shaped bending structure.

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

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