UWB antenna

Abstract

The invention discloses a UWB antenna, and relates to the technical field of wireless communication. The UWB antenna comprises a substrate, a radiating body and a grounding body, the substrate is provided with a first surface and a second surface which are arranged back to back, the radiating body is arranged on the first surface in an attached mode, the radiating body is provided with a feed port, the grounding body is arranged on the second surface in an attached mode, the radiating body is electrically connected with the grounding body, and the feed port is connected with the grounding body. The substrate is provided with a first via hole and a second via hole which are arranged at an interval, the first end of the first via hole and the first end of the second via hole are both electrically connected with the radiator, and the second end of the first via hole and the second end of the second via hole are both electrically connected with the grounding body to form a closed loop. According to the scheme, the problems that the profile of an existing UWB antenna is high and the beam design difficulty is large can be solved.

Description

Technical Field

[0001] The present application belongs to the field of wireless communication technology, and specifically relates to a UWB antenna. Background Art

[0002] UWB (Ultra Wide Band) is a wireless carrier communication technology. Different from traditional wireless communication technology, it does not use a sinusoidal carrier but uses nanosecond non-sinusoidal narrow pulses to transmit data. Therefore, the spectrum range occupied by UWB technology is relatively wide. At present, UWB technology is mainly used for real-time tracking and positioning of indoor people and objects, and is widely used in smart factories, modern warehousing and logistics, smart navigation in buildings and other fields.

[0003] The UWB antennas of base stations are mainly microstrip antennas / cross-dipole antennas, but the bandwidth of conventional microstrip antennas is relatively narrow and cannot meet the bandwidth requirements of actual use; the cross-dipole antenna has a high cross-section, which makes it difficult to process and is not easy to mass produce. At the same time, the base station antenna has a high requirement for the beam width, which makes the beam design of the cross-dipole antenna more difficult. Summary of the invention The purpose of the embodiments of the present application is to provide a UWB antenna that can solve the problems of the current UWB antenna having a high profile and a high difficulty in beam design.

[0004] In order to solve the above technical problems, this application is implemented as follows: The embodiment of the present application provides a UWB antenna, including a substrate, a radiator and a grounding body, wherein the substrate has a first surface and a second surface disposed opposite to each other, the radiator is disposed in close contact with the first surface, the radiator has a feeding port, the grounding body is disposed in close contact with the second surface, and the radiator is electrically connected to the grounding body. The substrate is provided with a first via hole and a second via hole arranged at intervals, the first end of the first via hole and the first end of the second via hole are both electrically connected to the radiator, and the second end of the first via hole and the second end of the second via hole are both electrically connected to the ground body to form a closed loop.

[0005] In an embodiment of the present application, a radiator and a grounding body are respectively arranged on the first and second surfaces opposite to each other of the substrate to form a patch antenna with a low cross-section and a simple structure, which is conducive to reducing the difficulty of beam design of the UWB antenna; and, the substrate is provided with a first via hole and a second via hole arranged at intervals, the first end of the first via hole and the first end of the second via hole are both electrically connected to the radiator, and the second end of the first via hole and the second end of the second via hole are both electrically connected to the grounding body to form a closed loop, thereby forming a magnetic dipole antenna, the bandwidth and beam width of which are both wide and can meet the use requirements of the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of the structure of the UWB antenna disclosed in the embodiment of the present application; Figure 2 A schematic diagram of the structure of the substrate and the radiator disclosed in the embodiment of the present application; Figure 3 A schematic diagram of the structure of the grounding body disclosed in the embodiment of the present application; Figure 4 A schematic diagram of a partial circuit structure of a UWB antenna disclosed in an embodiment of the present application; Figure 5 It is a return loss curve diagram of the UWB antenna disclosed in the embodiment of the present application, wherein the horizontal axis represents the frequency and the vertical axis represents the return loss value; Figure 6 : is the radiation pattern of the UWB antenna disclosed in the embodiment of the present application, wherein the solid line is the horizontal plane radiation pattern, the dotted line is the vertical plane radiation pattern, the horizontal axis represents the Theta angle, and the vertical axis represents the gain value; Figure 7 This is a gain-bandwidth variation diagram of the UWB antenna disclosed in an embodiment of the present application, wherein the horizontal axis represents the frequency and the vertical axis represents the gain value.

[0007] Description of reference numerals: 100 - substrate, 110 - first surface, 120 - second surface, 130 - first via hole, 140 - second via hole, 150 - third via hole; 200 - radiator, 210 - feeding port, 220 - feeding unit, 221 - first edge, 222 - second edge, 230 - coupling unit, 230 '- first coupling unit, 230 '- second coupling unit, 231 - first edge; 300- grounding body, 310- avoidance area. DETAILED DESCRIPTION

[0008] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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.

[0009] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0010] The UWB antenna provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0011] like Figures 1 to 4 As shown, an embodiment of the present application discloses a UWB antenna. Optionally, the UWB antenna can be applied to home interconnection, smart factories, unmanned exhibition and vending systems, modern warehousing and logistics, intelligent navigation in buildings, unmanned driving, intelligent medical guides in hospitals, and other fields. The embodiment of the present application does not impose specific restrictions on this.

[0012] The UWB antenna includes a substrate 100, a radiator 200 and a grounding body 300. Optionally, the substrate 100 can be made of a PCB board, and of course, can also be made of other structures, which is not specifically limited in the embodiment of the present application. The substrate 100 has a first surface 110 and a second surface 120 that are arranged opposite to each other. The radiator 200 is arranged in a close relationship on the first surface 110. The radiator 200 has a feeding port 210, which is used to be electrically connected to a feed source, thereby transmitting an electrical signal to the radiator 200, so that the radiator 200 radiates electromagnetic waves. The grounding body 300 is fittedly arranged on the second surface 120, the radiator 200 is electrically connected to the grounding body 300, and the grounding body 300 is a zero potential structure. When the radiator 200 is electrically connected to the grounding body 300, a radio frequency magnetic field is excited between the radiator 200 and the grounding body 300, and the radiator 200 radiates electromagnetic waves to the surroundings; and, a side of the grounding body 300 facing the second surface 120 can be used as a reflecting surface, so that the electromagnetic waves emitted by the radiator 200 toward the side of the substrate 100 where the grounding body 300 is located are reflected to the side where the radiator 200 is located, so as to form a directional antenna, thereby forming a superposition effect of the radiation field, so as to improve the gain of the UWB antenna. The substrate 100 is provided with first via holes 130 and second via holes 140 arranged at intervals, and the first via holes 130 and the second via holes 140 both extend in the thickness direction of the substrate 100 (ie, Figure 1In the Z direction), the first end of the first via 130 and the first end of the second via 140 are both electrically connected to the radiator 200, and the second end of the first via 130 and the second end of the second via 140 are both electrically connected to the grounding body 300 to form a closed loop, thereby forming a magnetic dipole antenna.

[0013] In the embodiment of the present application, the radiator 200 and the grounding body 300 are respectively arranged on the first surface 110 and the second surface 120 opposite to each other of the substrate 100 to form a patch antenna, which has a low profile and a simple structure, which is conducive to reducing the difficulty of beam design of the UWB antenna; and the first vias 130 and the second vias 140 arranged at intervals on the substrate 100 are respectively electrically connected to the radiator 200 and the grounding body 300 to form a closed loop, thereby forming a magnetic dipole antenna, which has a wide bandwidth and beam width, and can meet the use requirements of the base station. Therefore, the embodiment of the present application can solve the problems of the high profile and high difficulty of beam design of the current UWB antenna.

[0014] Optionally, at least one of the radiator 200 and the grounding body 300 may be a metal coating or a metal patch, and the embodiments of the present application do not impose specific restrictions on this; when at least one of the radiator 200 and the grounding body 300 is a metal coating, the required pattern can be obtained by an etching process; when at least one of the radiator 200 and the grounding body 300 is a metal patch, the metal patch must be completely fitted with the substrate 100, so that the first via 130 and the second via 140 provided on the substrate 100 can be fully electrically connected to the metal patch respectively, thereby ensuring that the impedance in the closed loop can be continuous, which is conducive to the stable transmission of electrical signals.

[0015] In an optional embodiment, the radiator 200 may be an integrated structure; or, the radiator 200 includes a feed unit 220 and a coupling unit 230 arranged at intervals, the first end of the first via 130 and the first end of the second via 140 are both electrically connected to the feed unit 220, the feed unit 220 is provided with a feed port 210, that is, the feed unit 220 is located in a closed loop, and the feed unit 220 is used to form a magnetic dipole antenna. There is a coupling gap between the feed unit 220 and the coupling unit 230, and the two are coupled to each other. When the feeding port 210 transmits the electrical signal to the feeding unit 220, the feeding unit 220 acts as a feed source to feed the coupling unit 230 on its side, so that a coupling effect occurs between the feeding unit 220 and the coupling unit 230, so as to generate a coupling current inside the coupling unit 230, thereby generating a new high-order resonant mode. At this time, the coupling unit 230 forms an electric dipole antenna for radiating electromagnetic waves. At this time, there are multiple resonant modes in the radiator 200, which is conducive to widening the beam width of the UWB antenna; and at this time, the feeding unit 220 and the coupling unit 230 jointly form a magneto-electric dipole antenna, which has the characteristics of broadband, stable frequency characteristics, good radiation performance, stable gain within the working frequency band, and good radiation pattern.

[0016] In another optional embodiment, the first via hole 130 and the second via hole 140 may be arranged arbitrarily. For example, the first via hole 130 and the second via hole 140 may be arranged along a direction perpendicular to the extension direction of the feeding unit 220 to the coupling unit 230 (ie, Figure 1 Y direction in ) direction (i.e. Figure 1 or, the first via hole 130 and the second via hole 140 are arranged at intervals along the extension direction of the feeding unit 220 to the coupling unit 230, that is, the extension direction of the first via hole 130 to the second via hole 140 is the same as the extension direction of the feeding unit 220 to the coupling unit 230, and the extension direction of the feeding unit 220 to the coupling unit 230 is parallel to the plane where the closed loop is located. At this time, the coupling unit 230 is closer to the closed loop, and the area facing the two is larger, which is conducive to improving the coupling performance of the coupling unit 230; and, the closed loop adopts this arrangement, and the electromagnetic waves radiated by it cover a larger area in the extension direction of the feeding unit 220 to the coupling unit 230, which is conducive to increasing the beam width of the UWB antenna.

[0017] In a further optional embodiment, in the extension direction of the feeding unit 220 toward the coupling unit 230, the first via 130 and the second via 140 may both be located in the central area of ​​the feeding unit 220; or, in the extension direction of the feeding unit 220 toward the coupling unit 230, the first via 130 and the second via 140 are respectively located on the first edge 221 and the second edge 222 of the feeding unit 220 opposite to each other. In this case, the current path of the closed loop is longer, and correspondingly, its performance of radiating electromagnetic waves is also greater; and, the distance between the coupling unit 230 and the closed loop is closer, which is conducive to increasing the coupling performance of the coupling unit 230, thereby improving the radiation performance of the coupling unit 230 and making the radiation performance of the entire UWB antenna better. In another optional embodiment, the substrate 100 is provided with a third via 150, the first end of the third via 150 is electrically connected to the coupling unit 230, and the second end of the third via 150 is electrically connected to the ground body 300. Optionally, the first end of the third via 150 extends to the side of the coupling unit 230 away from the substrate 100, and the second end of the third via 150 extends to the side of the ground body 300 away from the substrate 100, thereby ensuring that the third via 150 is electrically connected to the coupling unit 230 and the ground body 300 respectively. In this solution, by opening the third via 150 on the coupling unit 230, the current in the coupling unit 230 is rearranged, thereby improving the coupling performance of the coupling unit 230, and then improving the radiation performance of the UWB antenna. Of course, the third via 150 may not be opened, for example, by adjusting the size of the coupling unit 230 to improve the radiation performance of the UWB antenna. Optionally, the third via 150 can be arranged arbitrarily; or, the third via 150 is located at the edge of the coupling unit 230 close to the feeding unit 220. In this case, the distance between the third via 150 and the feeding unit 220 is relatively close, which is conducive to further improving the coupling performance of the coupling unit 230.

[0018] In an optional embodiment, the number of the third vias 150 is one; or, the number of the third vias 150 is at least two, the straight edge of the coupling unit 230 close to the feeding unit 220 is the first edge 231, and the third vias 150 are arranged in sequence along the extension direction of the first edge 231, and the distances between adjacent third vias 150 are equal, so as to ensure that the working mode of the coupling unit 230 is normal and the radiation pattern of the UWB antenna is more uniform. This solution further improves the coupling performance of the coupling unit 230 by setting a plurality of third vias 150, thereby further improving the radiation performance of the UWB antenna.

[0019] It should be noted that if the above-mentioned multiple third vias 150 are not evenly distributed, the working mode of the coupling unit 230 will be abnormal, thereby causing the radiation pattern of the UWB antenna to rotate or even distort. Therefore, the distances between adjacent third vias 150 in the above-mentioned multiple third vias 150 must be equal. In addition, in theory, the smaller the spacing between adjacent third vias 150, the better the coupling performance of the coupling unit 230, and the larger the spacing between adjacent third vias 150, the weaker the coupling performance of the coupling unit 230, and the lower the antenna gain. However, the actual processing difficulty needs to be considered, so the number of third vias 150 needs to be reasonably set. On the basis of convenient processing, the number of third vias 150 can be increased as much as possible.

[0020] In an optional embodiment, the number of coupling units 230 is one; or, the number of coupling units 230 is at least two, and each coupling unit 230 is evenly distributed on two opposite sides of the feeding unit 220. At this time, the coupling units 230 located on the opposite sides of the feeding unit 220 all have a coupling effect with the feeding unit 220, which is beneficial to improving the symmetry of the radiation pattern of the UWB antenna; and when the feeding port 210 transmits the electrical signal to the feeding unit 220, a coupling effect occurs between the coupling unit 230 arranged on one side of the feeding unit 220 and the feeding unit 220, so as to generate a coupling current inside the coupling unit 230 to generate a new high-order resonant mode. At the same time, a coupling effect also occurs between the coupling unit 230 arranged on the other side of the feeding unit 220 and the feeding unit 220, so as to generate a coupling current inside the coupling unit 230 to generate another new high-order resonant mode. At this time, there are more resonant modes in the radiator 200, which is beneficial to further broaden the beam width of the UWB antenna.

[0021] In another optional embodiment, the number of coupling units 230 may be one; or, the number of coupling units 230 is at least two, including a first coupling unit 230' and a second coupling unit 230", which are arranged at intervals. In the extension direction from the first via 130 to the second via 140, the feeding unit 220, the first coupling unit 230' and the second coupling unit 230", are arranged in sequence at intervals and coupled to each other, that is, the plurality of coupling units 230 are arranged on the same side of the feeding unit 220. Specifically, when the feeding port 210 transmits the electrical signal to the feeding unit 220, a coupling effect occurs between the feeding unit 220 and the first coupling unit 230', so as to generate a coupling current inside the first coupling unit 230', so as to generate a new high-order resonant mode; further, a coupling effect also occurs between the first coupling unit 230' and the second coupling unit 230", so as to generate a coupling current inside the second coupling unit 230", so as to generate another new high-order resonant mode. At this time, there are more resonant modes in the radiator 200, which is conducive to further widening the beam width of the UWB antenna.

[0022] Optionally, in the extension direction from the first via 130 to the second via 140, the size of the second coupling unit 230" may be equal to the size of the first coupling unit 230'; or, in other embodiments, in the extension direction from the first via 130 to the second via 140, the size of the second coupling unit 230" is smaller than the size of the first coupling unit 230', that is, by reducing the width of the second coupling unit 230", so as to adjust the current intensity on the second coupling unit 230", thereby adjusting the working mode of the equivalent array formed by the first coupling unit 230' and the second coupling unit 230", and then widening the beam width of the UWB antenna so that the beam width reaches the width required for actual operation.

[0023] Optionally, the width of the coupling gap between the first coupling unit 230' and the second coupling unit 230" may be equal to half of the center frequency wavelength of the radiator 200; or, in another embodiment, the width of the coupling gap between the first coupling unit 230' and the second coupling unit 230" is less than half of the center frequency wavelength of the radiator 200, so as to increase the coupling performance between the first coupling unit 230' and the second coupling unit 230", thereby further expanding the beam width of the UWB antenna.

[0024] Optionally, at least one of the feeding unit 220 and the coupling unit 230 may be in a triangular structure, a rectangular structure, etc., and the embodiments of the present application do not impose specific restrictions on this; further optionally, when the feeding unit 220 and the coupling unit 230 are both in a rectangular structure, both may be rectangular structures, and the feeding unit 220 and the coupling unit 230 may be arranged at intervals along the width direction of the feeding unit 220. At this time, the long edge of the feeding unit 220 is opposite to the long edge of the coupling unit 230, which is beneficial to improving the coupling performance between the two.

[0025] In an optional embodiment, the first end of the first via 130 and the first end of the second via 140 both extend to a side of the radiator 200 facing away from the substrate 100 to ensure that the first via 130 and the second via 140 are respectively fully electrically connected to the radiator 200, and the second end of the first via 130 extends to a side of the grounding body 300 facing away from the substrate 100 to ensure that the first via 130 is fully electrically connected to the grounding body 300, thereby making the impedance in the closed loop relatively continuous, thereby enabling the electrical signal to be transmitted stably.

[0026] Optionally, when at least one of the radiator 200 and the grounding body 300 is a metal coating, due to the thin thickness of the metal coating, in the process of opening the first via 130 and the second via 140, both will inevitably penetrate the metal coating; when at least one of the radiator 200 and the grounding body 300 is a metal patch, it is necessary to open a through hole in the metal patch so that the metal layer on the inner wall of the first via 130 and the second via 140 extends to the side of the metal patch away from the substrate 100, that is, the metal layer covers the inner wall of the through hole on the metal patch to ensure that the first via 130 and the second via 140 arranged on the substrate 100 can be fully electrically connected to the metal patch respectively. Optionally, the second end of the second via 140 can be physically connected to the grounding body 300; or, the grounding body 300 is provided with an avoidance area 310, and in the direction perpendicular to the substrate 100, the orthographic projection of the second via 140 is located within the orthographic projection of the avoidance area 310, and there is an annular gap between the contour line of the orthographic projection of the second via 140 and the contour line of the orthographic projection of the avoidance area 310, that is, the size of the avoidance area 310 is larger than the size of the second via 140. At this time, the second end of the second via 140 and the grounding body 300 can be electrically connected by coupling, and the annular gap can be equivalent to a capacitor, which is connected in parallel in a closed loop, and a partial structure in the closed loop (it should be noted that the partial structure does not include the grounding body 300) can be equivalent to an inductor, and the capacitor and the inductor are connected in parallel to form an equivalent circuit for adjusting the impedance of the entire UWB antenna, which effectively solves the problem of excessively high imaginary impedance caused by coupled feeding, thereby improving the bandwidth of the UWB antenna.

[0027] In an optional embodiment, the feeding port 210 can be provided separately from the first via hole 130 and the second via hole 140; or, the feeding port 210 is provided on the inner wall of the first via hole 130. In this case, there is no need to open an additional connection hole on the substrate 100 for electrically connecting the radiator 200 and the grounding body 300, which is conducive to simplifying the manufacturing process of the UWB antenna; and when the feeding port 210 is provided on the inner wall of the first via hole 130, the link loss of the closed loop formed by the first via hole 130, the second via hole 140, the radiator 200 and the grounding body 300 is small, which is conducive to improving the radiation performance of the UWB antenna. Optionally, when the feeding port 210 is disposed on the inner wall of the first via hole 130 , the feeding port 210 may be fed through a structure such as a connector (coaxial line), a laminate (ie, a feeding network), etc.

[0028] Optionally, the length, width and height of the substrate 100 may be 25*25*3 mm respectively. Of course, this may also be selected according to actual needs, and the embodiment of the present application does not impose any specific limitation on this.

[0029] It should be noted that the above-mentioned first via 130, second via 140 and third via 150 are all metallized holes. During the specific production, a through hole can be opened on the substrate 100, and then a metal layer can be coated in the through hole to provide electrical conduction for the metal layers on opposite sides of the substrate 100.

[0030] Based on the UWB antenna disclosed in the embodiment of the present application, in the specific process of manufacturing the UWB antenna, a double-sided PCB board can be used as the main body, and the required shape is etched on the Top Layer metal surface of the PCB, and metallized vias are added in the middle of the PCB board to make the Top Layer and Bottom Layer metal surfaces conductive, so as to change the working mode of each metal surface of the TopLayer, thereby forming a UWB antenna, so that the entire UWB antenna can achieve the wide bandwidth and wide beam effects required for actual work. refer to Figure 5 According to the return loss curve of the UWB antenna, when the return loss of the UWB antenna is -10dB, its bandwidth is 2GHz.

[0031] refer to Figure 6 According to the radiation pattern of the radiation unit of the UWB antenna, the beam width at 3dB in the horizontal plane is greater than 120°, and the beam width at 3dB in the vertical plane is greater than 115°.

[0032] refer to Figure 7 According to the gain-bandwidth variation curve of the UWB antenna, the gain peak of the UWB antenna in the band is greater than 4dBi, and the -1dB gain bandwidth is greater than 2GHz.

[0033] This shows that the radiation performance of the UWB antenna is good within its operating frequency band.

[0034] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A UWB antenna, characterized in that: The invention comprises a substrate (100), a radiator (200) and a grounding body (300), wherein the substrate (100) has a first surface (110) and a second surface (120) arranged opposite to each other, the radiator (200) is arranged in a close relationship on the first surface (110), the radiator (200) has a feeding port (210), the grounding body (300) is arranged in a close relationship on the second surface (120), and the radiator (200) is electrically connected to the grounding body (300). The substrate (100) is provided with a first via hole (130) and a second via hole (140) arranged at intervals, a first end of the first via hole (130) and a first end of the second via hole (140) are both electrically connected to the radiator (200), and a second end of the first via hole (130) and a second end of the second via hole (140) are both electrically connected to the grounding body (300) to form a closed loop.

2. The UWB antenna according to claim 1, characterized in that: The radiator (200) comprises a feeding unit (220) and a coupling unit (230) arranged at intervals, the first end of the first via hole (130) and the first end of the second via hole (140) are both electrically connected to the feeding unit (220), the feeding unit (220) is provided with the feeding port (210), and a coupling gap is provided between the feeding unit (220) and the coupling unit (230), and the two are coupled to each other.

3. The UWB antenna according to claim 2, characterized in that: The first via holes (130) and the second via holes (140) are arranged at intervals along an extension direction of the feeding unit (220) toward the coupling unit (230).

4. The UWB antenna according to claim 3, characterized in that: In the extension direction of the feeding unit (220) toward the coupling unit (230), the first via hole (130) and the second via hole (140) are respectively located on a first edge (221) and a second edge (222) opposite to each other of the feeding unit (220).

5. The UWB antenna according to claim 2, characterized in that: The substrate (100) is provided with a third via hole (150), a first end of the third via hole (150) is electrically connected to the coupling unit (230), the first end of the third via hole (150) extends to a side of the coupling unit (230) facing away from the substrate (100), the third via hole (150) is located at an edge of the coupling unit (230) close to the feeding unit (220), a second end of the third via hole (150) is electrically connected to the grounding body (300), and the second end of the third via hole (150) extends to a side of the grounding body (300) facing away from the substrate (100).

6. The UWB antenna according to claim 5, characterized in that: A straight edge of the coupling unit (230) close to the feeding unit (220) is a first edge (231), the number of the third via holes (150) is at least two, the third via holes (150) are arranged in sequence along the extension direction of the first edge (231), and the distances between adjacent third via holes (150) are equal.

7. The UWB antenna according to claim 2, characterized in that: The number of the coupling units (230) is at least two, and each of the coupling units (230) is evenly distributed on two opposite sides of the feeding unit (220).

8. The UWB antenna according to claim 2, characterized in that: The number of the coupling units (230) is at least two, including a first coupling unit (230') and a second coupling unit (230") which are arranged at intervals, and in an extension direction from the first via hole (130) to the second via hole (140), the feeding unit (220), the first coupling unit (230') and the second coupling unit (230") are arranged in sequence at intervals and coupled to each other.

9. The UWB antenna according to claim 8, characterized in that: In the extension direction of the first via hole (130) toward the second via hole (140), the size of the second coupling unit (230") is smaller than the size of the first coupling unit (230').

10. The UWB antenna according to claim 8, characterized in that: The width of the coupling gap between the first coupling unit (230') and the second coupling unit (230") is less than half of the central frequency wavelength of the radiator (200).

11. The UWB antenna according to claim 1, characterized in that: The first end of the first via hole (130) and the first end of the second via hole (140) both extend to a side of the radiator (200) facing away from the substrate (100), the second end of the first via hole (130) extends to a side of the grounding body (300) facing away from the substrate (100), the grounding body (300) is provided with a avoidance area (310), in a direction perpendicular to the substrate (100), the orthographic projection of the second via hole (140) is located within the orthographic projection of the avoidance area (310), and there is an annular gap between the contour line of the orthographic projection of the second via hole (140) and the contour line of the orthographic projection of the avoidance area (310).

12. The UWB antenna according to claim 1, characterized in that: The feeding port (210) is arranged on the inner wall of the first via hole (130).

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