UWB antenna and wearable device

Abstract

The present application discloses a UWB antenna and a wearable device, which are applied in the field of signal transmission and used to enhance the signal transmission capability of the antenna. The UWB antenna includes a dielectric substrate, a coaxial feeder, a first radiation patch, a second radiation patch and a ground patch. The first radiation patch and the second radiation patch are arranged on the front of the dielectric substrate, and the ground patch is arranged on the back of the dielectric substrate, and the first radiation patch and the ground patch are connected through a coaxial feeder. Since the present application adds a second radiation patch on the basis of the first radiation patch, the radiation capability of the antenna can be enhanced. Furthermore, since a certain gap is provided between the second radiation patch and the coaxial feeder, the resonant current can be increased, thereby increasing the bandwidth of the antenna. Furthermore, a plurality of hollow grooves are provided on the ground patch, so the path through which the current flows can be increased, and the first radiation patch and the second radiation patch can work together to broaden the working frequency band of the antenna and improve the ability of the antenna to transmit signals.

Description

Technical Field

[0001] The present application relates to the field of signal transmission, and in particular to a UWB antenna and a wearable device. Background Art

[0002] With the development of IoT communication technology, higher and higher requirements are placed on antennas as communication components. For example, in order to improve the user experience when using VR devices, a wide bandwidth and multi-band antenna is needed. However, the antenna bandwidth in the existing technology is relatively narrow and the frequency band is relatively small. Therefore, providing a wide bandwidth and multi-band antenna is an urgent problem to be solved in this field. Summary of the invention

[0003] The purpose of this application is to provide a UWB antenna and a wearable device, which can increase the resonant current, thereby increasing the bandwidth of the antenna, broadening the working frequency band of the antenna, and improving the antenna's ability to transmit signals.

[0004] In order to solve the above technical problems, the present application provides a UWB antenna, including:

[0005] dielectric substrate;

[0006] A coaxial feed line is arranged at the symmetry axis of the dielectric substrate, and the coaxial feed line extends along the symmetry axis, and one end of the coaxial feed line serves as a feeding point;

[0007] A first radiation patch is disposed on the front side of the dielectric substrate and connected to the core of the coaxial feed line;

[0008] Two second radiation patches are respectively arranged on both sides of the coaxial feed line and on the front side of the dielectric substrate, and a preset gap is provided between the second radiation patches and the coaxial feed line;

[0009] A ground patch, which is arranged on the back side of the dielectric substrate and connected to the outer skin of the coaxial feeder, and the ground patch is provided with a plurality of hollow grooves;

[0010] The first radiation patch and the second radiation patch are used to work together with the multiple hollow slots of the ground patch to generate a working frequency band covering UWB under the feeding excitation of the coaxial feed line.

[0011] Preferably, the second radiation patch includes a longitudinal patch portion, a first transverse patch portion and a second transverse patch portion; the longitudinal patch portion is arranged along the direction of the coaxial feed line, and a preset gap is provided between the longitudinal patch portion and the coaxial feed line, one end of the first transverse patch portion and one end of the second transverse patch portion are respectively connected to the two ends of the longitudinal patch portion, and the first transverse patch portion and the second transverse patch portion both have an angle with the longitudinal patch portion.

[0012] Preferably, the longitudinal patch portion, the first transverse patch portion and the second transverse patch portion are all rectangular patch portions.

[0013] Preferably, the first transverse patch portion is arranged close to the first radiation patch, the second transverse patch portion is arranged close to the edge of the dielectric substrate, and the transverse length of the first transverse patch portion is greater than the transverse length of the second transverse patch portion.

[0014] Preferably, the first radiation patch is arranged in the middle of the front side of the dielectric substrate; the ground patch is provided with a first rectangular hollow groove, and the first rectangular hollow groove corresponds to the middle of the back side of the dielectric substrate, and the first rectangular hollow groove is symmetrical about the symmetry axis.

[0015] Preferably, the ground patch is also provided with a second rectangular hollow groove, a third rectangular hollow groove and a fourth rectangular hollow groove, the third rectangular hollow groove is located between the second rectangular hollow groove and the fourth rectangular hollow groove, and the third rectangular hollow groove is symmetrical about the symmetry axis, and the second rectangular hollow groove and the fourth rectangular hollow groove are symmetrical about the symmetry axis.

[0016] Preferably, the ground patch is provided with a fifth hollow slot, the fifth hollow slot corresponds to the position of the second radiation patch, and the fifth hollow slot is symmetrical about the symmetry axis.

[0017] Preferably, the fifth hollow groove comprises a transverse groove, two longitudinal grooves and a rectangular annular groove; the transverse groove passes through the annular groove and extends out of the annular groove, and both ends of the transverse groove are respectively connected to one of the longitudinal grooves and connected to the center point of the longitudinal groove;

[0018] The annular groove, the transverse groove and the two longitudinal grooves are connected to each other.

[0019] In order to solve the above technical problems, the present application also provides a wearable device, including the UWB antenna mentioned above.

[0020] Preferably, the wearable device is a smart watch or VR glasses.

[0021] The present application provides a UWB antenna, which is applied to the field of signal transmission and is used to enhance the signal transmission capability of the antenna. The UWB antenna includes a dielectric substrate, a coaxial feeder, a first radiation patch, a second radiation patch and a ground patch. The first radiation patch and the second radiation patch are arranged on the front of the dielectric substrate, and the ground patch is arranged on the back of the dielectric substrate, and the first radiation patch and the ground patch are connected through a coaxial feeder. Since the present application adds a second radiation patch on the basis of the first radiation patch, the radiation capability of the antenna can be enhanced. Furthermore, since a certain gap is provided between the second radiation patch and the coaxial feeder, the resonant current can be increased, thereby increasing the bandwidth of the antenna. Furthermore, a plurality of hollow grooves are provided on the ground patch, so the path through which the current flows can be increased, and the first radiation patch and the second radiation patch can work together to broaden the working frequency band of the antenna and improve the ability of the antenna to transmit signals.

[0022] The present application also provides a wearable device having the same beneficial effects as the UWB antenna described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a UWB antenna provided in this application;

[0025] Figure 2 A schematic plan view of the front side of an antenna provided in this application;

[0026] Figure 3 A schematic plan view of the back side of an antenna provided in this application;

[0027] Figure 4 A schematic diagram of the thickness of the side of the antenna provided in this application;

[0028] Figure 5 A schematic diagram of the first structure of the antenna provided in this application;

[0029] Figure 6 A second structural schematic diagram of the antenna provided in this application;

[0030] Figure 7 A third structural schematic diagram of the antenna provided in this application;

[0031] Figure 8 A schematic diagram of the bandwidth of the antenna provided in this application under different structures;

[0032] Fig. 9 A schematic diagram of the bandwidth of the antenna provided in this application;

[0033] Fig.10 The antenna pattern of the H plane provided in this application;

[0034] Fig.11 This is the antenna pattern of the E-plane provided in this application. DETAILED DESCRIPTION

[0035] The core of this application is to provide a UWB antenna and wearable device, which can increase the resonant current, thereby increasing the bandwidth of the antenna, broadening the working frequency band of the antenna, and improving the antenna's ability to transmit signals.

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a UWB antenna provided in this application, the antenna comprising:

[0038] Dielectric substrate 1;

[0039] A coaxial feed line 2 is arranged at the symmetry axis of the dielectric substrate 1, and the coaxial feed line 2 extends along the symmetry axis, and one end of the coaxial feed line 2 serves as a feeding point;

[0040] The first radiation patch 3 is arranged on the front side of the dielectric substrate 1 and connected to the core of the coaxial feed line 2;

[0041] Two second radiation patches 4 are respectively arranged on both sides of the coaxial feed line 2 and on the front side of the dielectric substrate 1, and a preset gap is provided between the two second radiation patches 4 and the coaxial feed line 2;

[0042] A ground patch 5 is provided on the back of the dielectric substrate 1 and connected to the outer skin of the coaxial feed line 2, and the ground patch 5 is provided with a plurality of hollow grooves 6;

[0043] The first radiation patch 3 and the second radiation patch 4 are used to work together with the multiple hollow slots 6 of the ground patch 5 to generate a working frequency band covering UWB under the feeding excitation of the coaxial feed line 2.

[0044] Since UWB antennas have the advantages of high data transmission rate, low transmission power and precise positioning, when UWB antennas are applied to wearable devices or VR devices, the ability of VR devices to transmit signals can be improved. Furthermore, this application increases the bandwidth and frequency band of the UWB antenna through structural design, further increasing the signal transmission capability of the antenna.

[0045] Specifically, the present application additionally sets two second radiation patches 4 on the front side of the dielectric substrate 1 to increase the area of ​​the total radiation patch, thereby increasing the signal transmission capability. Furthermore, since a preset gap is provided between the second radiation patch 4 and the coaxial feeder 2, at this time, under the excitation of the coaxial feeder 2, the resonant current will gather at the preset gap, thereby increasing the intensity of the resonant current at the radiation patch, which can increase the signal transmission capability of the antenna. Furthermore, a plurality of hollow grooves 6 are provided on the ground patch 5 in the present application, thereby increasing the path for the resonant current to flow, thereby increasing the frequency band of the UWB antenna, thereby increasing the signal transmission capability of the antenna.

[0046] It should be noted that the first radiation patch 3 in the present application can be but is not limited to being arranged in the middle position of the front side of the dielectric substrate 1, wherein the structure of the first radiation patch 3 can be a structure, specifically can be symmetrical about the symmetry axis.

[0047] It should be further explained that one end of the coaxial feed line 2 as a feed point in the present application is arranged at the edge of the lower part of the dielectric substrate 1. When the first radiation patch 3 is a rectangular structure, the coaxial feed line 2 is perpendicular to the rectangular side connected to the first radiation patch 3.

[0048] In summary, the structure of the UWB antenna in the present application can increase the resonant current of the antenna, thereby increasing the bandwidth of the antenna, broadening the working frequency band of the antenna, and improving the antenna's ability to transmit signals.

[0049] Based on the above embodiments:

[0050] As a preferred embodiment, the second radiation patch 4 includes a longitudinal patch portion, a first transverse patch portion and a second transverse patch portion; the longitudinal patch portion is arranged along the direction of the coaxial feed line 2, and a preset gap is provided between the coaxial feed line 2, one end of the first transverse patch portion and one end of the second transverse patch portion are respectively connected to the two ends of the longitudinal patch portion, and the first transverse patch portion and the second transverse patch portion both have an angle with the longitudinal patch portion.

[0051] This embodiment aims to provide a specific structure of the second radiation patch 4. Specifically, the second radiation patch 4 can be, but is not limited to, a C-shaped structure, specifically including a longitudinal patch portion, a first transverse patch portion, and a second transverse patch portion. Specifically, the second radiation patch 4 is made of the above three patch portions. At this time, the second radiation patch 4 of the C-shaped structure on the right side opens to the right, and the second radiation patch 4 of the C-shaped structure on the left side opens to the left.

[0052] Furthermore, in this embodiment, the first transverse patch portion and the second transverse patch portion are both perpendicular to the longitudinal patch portion, that is, the first transverse patch portion and the second transverse patch portion are perpendicular to the extension direction of the coaxial feed line 2 .

[0053] As a preferred embodiment, the longitudinal patch portion, the first transverse patch portion and the second transverse patch portion are all rectangular patch portions.

[0054] Furthermore, the specific structure of the three patch patches in this embodiment can be but is not limited to a rectangular structure. Figure 1 or Figure 2 .

[0055] Of course, it may also be other shapes, which are not limited in this embodiment.

[0056] As a preferred embodiment, the first transverse patch portion is arranged near the first radiation patch 3, the second transverse patch portion is arranged near the edge of the dielectric substrate 1, and the transverse length of the first transverse patch portion is greater than that of the second transverse patch portion.

[0057] Furthermore, the transverse lengths of the first transverse patch portion and the second transverse patch portion in the present application may be the same or different. Specifically, the transverse length of the first transverse patch portion may be greater than the transverse length of the second transverse patch portion. The specific value of the transverse length is determined according to the test results.

[0058] As a preferred embodiment, the first radiation patch 3 is arranged in the middle of the front side of the dielectric substrate 1; the ground patch 5 is provided with a first rectangular hollow groove 61, and the first rectangular hollow groove 61 corresponds to the middle of the back side of the dielectric substrate 1, and the first rectangular hollow groove 61 is symmetrical about the symmetry axis.

[0059] This embodiment aims to define the specific structure of the hollow slot 6 in the present application. Specifically, when the first radiation patch 3 is provided in the middle of the front surface of the dielectric substrate 1, the ground patch 5 is provided with a first rectangular hollow slot 61 at the corresponding position of the first radiation patch 3, that is, at the middle of the back surface of the dielectric substrate 1. The corresponding position here refers to the corresponding position of the front surface and the back surface of the dielectric substrate 1, respectively.

[0060] Furthermore, the size of the first rectangular hollow slot 61 may be larger than the size of the first radiation patch 3 .

[0061] As a preferred embodiment, the ground patch 5 is also provided with a second rectangular hollow groove 62, a third rectangular hollow groove 63 and a fourth rectangular hollow groove 64, the third rectangular hollow groove 63 is located between the second rectangular hollow groove 62 and the fourth rectangular hollow groove 64, and the third rectangular hollow groove 63 is symmetrical about the symmetry axis, and the second rectangular hollow groove 62 and the fourth rectangular hollow groove 64 are symmetrical about the symmetry axis.

[0062] Specifically, the present embodiment further includes a second rectangular hollow slot 62, a third rectangular hollow slot 63 and a fourth rectangular hollow slot 64. Specifically, the second rectangular hollow slot 62, the third rectangular hollow slot 63 and the fourth rectangular hollow slot 64 can be arranged above the first rectangular hollow slot 61, wherein the above here refers to the side away from the feed point.

[0063] The specific dimensions of the second rectangular hollow groove 62 , the third rectangular hollow groove 63 and the fourth rectangular hollow groove 64 are not particularly limited in this application.

[0064] Specifically, the width of the third rectangular hollow slot 63 in the present application is greater than the width of the second rectangular hollow slot 62 and greater than the width of the fourth rectangular hollow slot 64, and the width of the second rectangular hollow slot 62 is equal to the width of the fourth rectangular hollow slot 64. The length of the third rectangular hollow slot 63 in the present application is less than the length of the second rectangular hollow slot 62 and greater than the length of the fourth rectangular hollow slot 64, and the length of the second rectangular hollow slot 62 is equal to the length of the fourth rectangular hollow slot 64. Among them, the width is the length along the extension direction of the coaxial feeder 2, and the length is the length perpendicular to the extension direction of the coaxial feeder 2.

[0065] As a preferred embodiment, the ground patch 5 is provided with a fifth hollow slot 6, the fifth hollow slot 6 corresponds to the position of the second radiation patch 4, and the fifth hollow slot 6 is symmetrical about the symmetry axis.

[0066] Furthermore, the ground patch 5 is further provided with a fifth hollow slot 6. Specifically, the fifth hollow slot 6 corresponds to the position of the second radiation patch 4. The corresponding position here refers to the corresponding position of the front and back sides of the dielectric substrate 1. Specifically, the fifth hollow slot 6 is provided on the back side directly opposite to the second radiation patch 4. At this time, the fifth hollow slot 6 is inductively coupled to the second radiation patch 4 on the front side to increase the bandwidth of the antenna and broaden the frequency band of the antenna.

[0067] As a preferred embodiment, the fifth hollow groove 6 includes a transverse groove 67, two longitudinal grooves 66 and a rectangular annular groove 65; the transverse groove 67 penetrates the annular groove 65 and extends out of the annular groove 65, and the two ends of the transverse groove 67 are respectively connected to a longitudinal groove 66 and connected to the center point of the longitudinal groove 66;

[0068] The annular groove 65 , the transverse groove 67 and the two longitudinal grooves 66 are connected to each other.

[0069] Specifically, the specific structure of the fifth hollow groove 6 may include, but is not limited to, a rectangular annular groove 65, and a transverse groove 67 that penetrates and extends from the annular groove 65, and the two ends of the transverse groove 67 are respectively connected to the center point of a longitudinal groove 66. When the transverse groove 67 penetrates the annular groove 65, it may also pass through the midpoint of the annular groove 65.

[0070] Furthermore, the upper edge of the rectangular annular groove 65 (the side away from the feed point) corresponds to the lower edge of the first transverse patch portion, the lower edge of the rectangular annular groove 65 (the side close to the feed point) corresponds to the upper edge of the second transverse patch, and the width of the rectangular annular groove 65 (the length perpendicular to the extension direction of the coaxial feed line 2) is greater than or equal to the transverse length of the first transverse patch portion.

[0071] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic plan view of the front side of an antenna provided in this application. Figure 3 This is a schematic plan view of the back side of an antenna provided in this application. Figure 4 This is a schematic diagram of the thickness of the antenna side provided in this application. In a specific embodiment, Figure 2 , Figure 3 and Figure 4 The size parameters of each part are shown in Table 1, which is a schematic table of antenna parameters provided in this application.

[0072] Table 1 Antenna size parameters

[0073]

[0074] Wherein, Wsub is the width of the dielectric substrate 1;

[0075] Lsub is the length of the dielectric substrate 1;

[0076] Hsub is the thickness of the dielectric substrate 1;

[0077] Wpatch is the width of the first radiation patch 3;

[0078] Lpatch is the length of the first radiation patch 3;

[0079] Wfeed is the width of the coaxial feed line 2;

[0080] Lfeed is the length of the coaxial feed line 2;

[0081] G_feed is the gap width between the coaxial feed line 2 and the second radiation patch 4;

[0082] Lp1 is the lateral length of the second lateral patch portion;

[0083] Lp2 is the length of the longitudinal patch portion;

[0084] Lp3 is the lateral length of the first lateral patch portion;

[0085] Wp is the width of the longitudinal patch portion, the first transverse patch portion, and the second transverse patch portion;

[0086] L_Gp1 is the length from the lower edge of the first rectangular hollow groove 61 to the upper edge of the dielectric substrate 1;

[0087] L_Gp2 is the length from the left edge of the third rectangular central control groove to the left edge of the dielectric substrate 1;

[0088] L_Gp3 is the length from the upper edge of the first rectangular central control groove to the upper edge of the dielectric substrate 1;

[0089] W_Gp is ​​the length from the left edge of the first rectangular hollow slot 61 to the left edge of the dielectric substrate 1 (the width of the ground patch 5);

[0090] L_s1 is the length between the inner edges of the annular groove 65;

[0091] L_s3 is the length between the outer edges of the two longitudinal grooves 66;

[0092] L_s4 is the longitudinal length of the two longitudinal grooves 66;

[0093] W_s is the width of the annular groove 65 , the transverse groove 67 and the longitudinal groove 66 .

[0094] Of course, the above is only a specific implementation method of this embodiment, and the specific dimensions are not limited to the examples in the above table. When designing the antenna, since the various structures of the antenna influence each other, all dimensions can be proportionally enlarged or reduced to adjust the frequency. Furthermore, the operating frequency band of the antenna in this application is 3.1GHz~10.6GHz, and the gap between the C-type radiation patch and the coaxial feed line 2 has a greater impact on the antenna resonance. At this time, the size of the gap cannot be changed at will. When the operating frequency band needs to be changed, the gap structure can be adjusted accordingly (enlarged or reduced, etc., depending on the actual situation). Furthermore, the C-type radiation patch on the front of the dielectric substrate 1 and the ground patch 5 on the back will influence each other, so the Lp2 described above is the same width as the ground, that is, Lp2+LGp1=Lsub.

[0095] Please refer to Figures 5 to 8 , Figure 5 This is a schematic diagram of the first structure of the antenna provided in this application. Figure 6 This is a schematic diagram of the second structure of the antenna provided in this application. Figure 7This is a third structural schematic diagram of the antenna provided in this application. Figure 1 This is the final structural diagram of the antenna of this application. Figure 8 Schematic diagram of bandwidth of antennas with different structures provided in this application. ANT1 corresponds to the schematic diagram of the first structure of the antenna, ANT2 corresponds to the schematic diagram of the second structure of the antenna, ANT3 corresponds to the schematic diagram of the third structure of the antenna, and ANT4 corresponds to Figure 1 From the structural diagram in , it can be seen that the structure in this application corresponds to the widest bandwidth.

[0096] Please refer to Fig. 9 , Fig. 9 A schematic diagram of the bandwidth of the antenna provided in this application. Specifically, under the influence of the above structure, the bandwidth of the antenna is widened. Specifically, Fig. 9 The antenna bandwidth is 3.07-10.8 GHz, which can fully cover the UWB frequency band and generate four resonances within the bandwidth, namely 3.23 GHz, 4.24 GHz, 6.17 GHz and 9.91 GHz.

[0097] Please refer to Fig.10 and Fig.11 , Fig.10 The antenna pattern of the H plane provided in this application, Fig.11 The antenna radiation pattern of the E plane provided in this application, the above two figures describe the radiation patterns corresponding to the four resonant frequencies. It can be seen that the maximum gain of the antenna is 4.9dB.

[0098] A wearable device comprises the above-mentioned UWB antenna.

[0099] In order to solve the above technical problems, the present application also provides a wearable device. For the introduction of the wearable device, please refer to the above embodiments, and the present application will not go into details here.

[0100] Among them, as a preferred embodiment, the wearable device is a smart watch or VR glasses.

[0101] Of course, it may also be other electronic devices, and this application is not limited here.

[0102] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0103] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A UWB antenna, characterized in that: include: dielectric substrate; A coaxial feed line is arranged at the symmetry axis of the dielectric substrate, and the coaxial feed line extends along the symmetry axis, and one end of the coaxial feed line serves as a feeding point; A first radiation patch is disposed on the front side of the dielectric substrate and connected to the core of the coaxial feed line; Two second radiation patches are respectively arranged on both sides of the coaxial feed line and on the front side of the dielectric substrate, and a preset gap is provided between the second radiation patches and the coaxial feed line; A ground patch, which is arranged on the back side of the dielectric substrate and connected to the outer skin of the coaxial feeder, and the ground patch is provided with a plurality of hollow grooves; The first radiation patch and the second radiation patch are used to work together with the plurality of hollow slots of the ground patch to generate a working frequency band covering UWB under the feeding excitation of the coaxial feed line; The ground patch is provided with a first rectangular hollow groove, and the first rectangular hollow groove corresponds to the middle part of the back side of the dielectric substrate, and the first rectangular hollow groove is symmetrical about the symmetry axis; The ground patch is further provided with a second rectangular hollow groove, a third rectangular hollow groove and a fourth rectangular hollow groove, the third rectangular hollow groove is located between the second rectangular hollow groove and the fourth rectangular hollow groove, and the third rectangular hollow groove is symmetrical about the symmetry axis, and the second rectangular hollow groove and the fourth rectangular hollow groove are symmetrical about the symmetry axis; The ground patch is provided with a fifth hollow slot, the fifth hollow slot corresponds to the position of the second radiation patch, and the fifth hollow slot is symmetrical about the symmetry axis; The fifth hollow groove includes a transverse groove, two longitudinal grooves and a rectangular annular groove; the transverse groove passes through the annular groove and extends out of the annular groove, and the two ends of the transverse groove are respectively connected to one of the longitudinal grooves and connected to the center point of the longitudinal groove; The annular groove, the transverse groove and the two longitudinal grooves are connected to each other.

2. The UWB antenna according to claim 1, characterized in that: The second radiation patch includes a longitudinal patch portion, a first transverse patch portion and a second transverse patch portion; the longitudinal patch portion is arranged along the direction of the coaxial feed line, and a preset gap is provided between the longitudinal patch portion and the coaxial feed line, one end of the first transverse patch portion and one end of the second transverse patch portion are respectively connected to the two ends of the longitudinal patch portion, and the first transverse patch portion and the second transverse patch portion both have an angle with the longitudinal patch portion.

3. The UWB antenna according to claim 2, characterized in that: The longitudinal patch portion, the first transverse patch portion, and the second transverse patch portion are all rectangular patch portions.

4. The UWB antenna according to claim 2, characterized in that: The first transverse patch portion is arranged close to the first radiation patch, the second transverse patch portion is arranged close to the edge of the dielectric substrate, and the transverse length of the first transverse patch portion is greater than the transverse length of the second transverse patch portion.

5. The UWB antenna according to claim 2, characterized in that: The first radiation patch is arranged at the middle of the front surface of the dielectric substrate.

6. A wearable device, characterized in that: Comprising the UWB antenna as described in any one of claims 1-5.

7. The wearable device according to claim 6, characterized in that: The wearable device is a smart watch or VR glasses.

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