Antenna

Abstract

The utility model discloses a UWB antenna, and relates to the technical field of communication equipment. The UWB antenna comprises a substrate, a grounding body, a first radiator and a second radiator, the substrate is provided with a through hole, the substrate is provided with a first surface and a second surface which are arranged back to back, the grounding body is arranged on the first surface, the first radiator and the second radiator are both arranged on the second surface, and the first radiator and the second radiator are arranged in the through hole. The first radiating body and the second radiating body intersect and are in plug-in fit, the central axis of the first radiating body and the central axis of the second radiating body are collinear, the central axis of the first radiating body and the central axis of the second radiating body are respectively provided with a feed port, and the feed ports feed through the through holes. According to the scheme, the problem that the bandwidth of an existing UWB antenna is narrow is 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 that uses broadband pulse communication technology and has strong anti-interference capabilities, which greatly reduces positioning errors and achieves centimeter-level positioning accuracy. UWB positioning technology relies on wireless communications and positioning beacons to achieve real-time tracking and positioning of indoor people and objects. It is widely used in smart factories, unmanned exhibitions and vending systems, modern warehousing and logistics, important personnel and equipment management, intelligent navigation in buildings, and intelligent medical guides in hospitals.

[0003] The current UWB antenna's feeding port is usually located on the side of the UWB antenna, and the current entering the UWB antenna flows in the same direction. In this case, the electric field formed by the UWB antenna's electric dipole is unevenly distributed, resulting in poor non-circularity of the energy radiated by the UWB antenna in the horizontal plane. The coverage range of this energy is narrow, resulting in a narrow bandwidth of the UWB antenna. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a UWB antenna, which is helpful in solving the problem of narrow bandwidth of the current UWB antenna.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of the present application provides a UWB antenna, including a substrate, a grounding body, a first radiator, and a second radiator. The substrate is provided with a through hole, and the substrate has a first surface and a second surface arranged opposite to each other. The grounding body is arranged on the first surface, and the first radiator and the second radiator are both arranged on the second surface. The first radiator and the second radiator intersect and are plug-matched. The central axis of the first radiator is colinear with the central axis of the second radiator. The central axis of the first radiator and the central axis of the second radiator both have feeding ports, and the feeding ports are fed through the through hole.

[0007] In an embodiment of the present application, the first radiator and the second radiator are both arranged on the second surface of the substrate, the first radiator and the second radiator intersect and are plugged together, the central axis of the first radiator is collinear with the central axis of the second radiator, and the central axis of the first radiator and the central axis of the second radiator both have feeding ports, and the feeding ports are both fed through the through holes of the substrate. At this time, the current passed into the first radiator and the current passed into the second radiator flow in different directions respectively, and the electric field directions at the central axis are opposite, and the currents cancel each other out, so that the energy at the central axis is weak, or even almost non-existent, but far away from the central axis, that is, at a large inclination angle, the energy is more, and the signal is stronger, thereby increasing the bandwidth of the UWB antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A front view of the UWB antenna disclosed in the embodiment of the present application;

[0009] Figure 2 A top view of the UWB antenna disclosed in an embodiment of the present application;

[0010] Figure 3 A schematic diagram of the structure of a first radiator disclosed in an embodiment of the present application;

[0011] Figure 4 A schematic diagram of the structure of a second radiator disclosed in an embodiment of the present application;

[0012] Figures 5 and 6 It is a schematic diagram of the structure of the substrate disclosed in the embodiment of the present application at different viewing angles;

[0013] Figure 7 A reflection coefficient curve diagram of the feeding port of the UWB antenna disclosed in the embodiment of the present application at different resonant frequencies;

[0014] Figure 8 A beam pattern of the UWB antenna disclosed in an embodiment of the present application in a direction perpendicular to the first substrate when the cone angle is 0°;

[0015] Fig. 9 A beam pattern of the UWB antenna disclosed in an embodiment of the present application in a direction perpendicular to the first substrate when the cone angle is 90°;

[0016] Fig.10 It is a beam pattern of the UWB antenna disclosed in an embodiment of the present application in a plane parallel to the first substrate.

[0017] Description of reference numerals:

[0018] 100 - substrate, 110 - through hole, 111 - first through hole, 112 - second through hole, 120 - first surface, 130 - second surface, 140 - main body, 150 - pad;

[0019] 200- grounding body;

[0020] 300 - first radiator, 310 - feeding port, 320 - first edge, 330 - second edge, 340 - third edge, 350 - gap, 360 - first avoidance opening, 361 - second accommodating groove, 370 - first fixing portion, 371 - first accommodating groove, 372 - avoidance notch;

[0021] 400 - second radiator, 410 - second avoidance opening, 420 - second fixing portion;

[0022] 500-weld parts;

[0023] 600-Feed. DETAILED DESCRIPTION

[0024] 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.

[0025] 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. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0026] 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.

[0027] refer to Figures 1 to 10The embodiment of the present application discloses a UWB antenna, including a substrate 100, a grounding body 200, a first radiator 300 and a second radiator 400. The substrate 100 is provided with a through hole 110. The substrate 100 has a first surface 120 and a second surface 130 arranged opposite to each other. The grounding body 200 is arranged on the first surface 120. Optionally, the grounding body 200 can be a metal structure, and of course it can also be other structures, which is not specifically limited here; further optionally, the grounding body 200 can be arranged on the first substrate 100 by electroplating, and of course it can also adopt a split structure and be connected to the first substrate 100 by bonding or the like, which is not specifically limited here. The first radiator 300 and the second radiator 400 are both arranged on the second surface 130, the first radiator 300 and the second radiator 400 intersect and are plugged together, the central axis of the first radiator 300 is colinear with the central axis of the second radiator 400, and the central axis of the first radiator 300 and the central axis of the second radiator 400 both have a feeding port 310. Optionally, one end of the first radiator 300 facing the second surface 130 and one end of the second radiator 400 facing the second surface 130 are both provided with a feeding port 310, and the feeding port 310 is respectively located at the central axis of the first radiator 300 and the central axis of the second radiator 400. The feeding port 310 is fed through the through hole 110. At this time, the current passing through the first radiator 300 and the current passing through the second radiator 400 flow in different directions respectively, and the electric field directions at the central axis are opposite, and the currents cancel each other out, so that the energy at the central axis is weak, or even almost non-existent, but the energy is greater at a large inclination away from the central axis, and the signal is stronger, thereby increasing the bandwidth of the UWB antenna. Therefore, the embodiment of the present application can solve the problem of the narrow bandwidth of the current UWB antenna.

[0028] Optionally, at least one of the first radiator 300 and the second radiator 400 may be a metal structure. Since the metal structure has good conductivity, it is beneficial to improve the feeding performance of the first radiator 300 and the second radiator 400 .

[0029] In an optional embodiment, the first radiator 300 and the second radiator 400 are both flat-plate structures. Optionally, the angle formed between the first radiator 300 and the second radiator 400 can be an acute angle or an obtuse angle. In this case, in a plane parallel to the second surface 130, the electromagnetic waves radiated by the first radiator 300 and the second radiator 400 are unevenly distributed. Therefore, in other embodiments, the first radiator 300 and the second radiator 400 are vertically arranged, that is, the angle formed between the first radiator 300 and the second radiator 400 is approximately 90° (which can be 90° or slightly greater than or slightly less than 90°). In this case, the electromagnetic waves radiated by the first radiator 300 and the second radiator 400 are relatively evenly distributed, which is beneficial to improving the non-roundness of the UWB antenna.

[0030] In another optional embodiment, the first radiator 300 and the second radiator 400 are both axisymmetric structures, and the first symmetry axis of the first radiator 300 and the second symmetry axis of the second radiator 400 both coincide with the central axis of the first radiator 300. At this time, the electromagnetic waves radiated from the first radiator 300 to the surroundings and the electromagnetic waves radiated from the second radiator 400 to the surroundings are symmetrically distributed about the central axis of the first radiator 300 (and also about the central axis of the second radiator 400), which is conducive to improving the non-circularity of the UWB antenna. Of course, the first radiator 300 and the second radiator 400 may not be set as axisymmetric structures, and there may be a certain distance between the first symmetry axis of the first radiator 300 and the second symmetry axis of the second radiator 400.

[0031] In an embodiment in which the first radiator 300 and the second radiator 400 are vertically arranged, the first radiator 300 and the second radiator 400 are both axially symmetrical structures, and the first symmetry axis of the first radiator 300 and the second symmetry axis of the second radiator 400 both coincide with the central axis of the first radiator 300, that is, the electromagnetic wave radiation source formed by the first radiator 300 and the second radiator 400 has a centrally symmetrical structure, and the electromagnetic waves around the electromagnetic wave radiation source are more evenly distributed, which is beneficial to further improve the out-of-roundness of the UWB antenna.

[0032] Optionally, the edge of the first radiator 300 facing the second surface 130 and the edge of the second radiator 400 facing the second surface 130 may both be straight edges; or, in other optional embodiments, both sides of the first symmetry axis of the first radiator 300 and both sides of the second symmetry axis of the second radiator 400 have a first edge 320, a second edge 330 and a third edge 340 connected in sequence, the first edge 320, the second edge 330 and the third edge 340 all face the second surface 130, the first edge 320 and the third edge 340 are both parallel to the second surface 130, and the distance between the first edge 320 and the second surface 130 is greater than the distance between the third edge 340 and the second surface 130, and the second edge 330 is inclined relative to the second surface 130. In this solution, the edge of the first radiator 300 facing the second surface 130 and the edge of the second radiator 400 facing the second surface 130 are both configured as a zigzag structure to extend the current path in the first radiator 300 and the second radiator 400, thereby further increasing the bandwidth of the UWB antenna. Of course, the first edge 320 and the third edge 340 may also be inclined relative to the second surface 130, but the inclination of the first edge 320 and the third edge 340 relative to the second surface 130 may be different from the inclination of the second edge 330 relative to the second surface 130, and may be greater or less than, and there is no specific limitation on this here.

[0033] It should be noted that the lengths of the first edge 320, the second edge 330, and the third edge 340 of the first radiator 300 and the first edge 320, the second edge 330, and the third edge 340 of the second radiator 400 may be the same or different, and may be flexibly adjusted according to actual needs, and the embodiment of the present application does not impose specific restrictions on this. In addition, the length of the first edge 320, the length of the second edge 330, and the length of the third edge 340 may be flexibly adjusted according to actual needs, and the embodiment of the present application does not impose specific restrictions on this.

[0034] In another optional embodiment, one end of the first radiator 300 facing the second surface 130 and one end of the second radiator 400 facing the second surface 130 are both provided with a slot 350. When the bandwidth of the UWB antenna remains unchanged, the slot 350 can extend the current path in the first radiator 300 and the second radiator 400, and the size of the first radiator 300 and the second radiator 400 can be reduced, thereby facilitating the miniaturization of the UWB antenna. Optionally, the slot 350 can be tilted relative to the central axis of the first radiator 300; or, the extension direction of the slot 350 is the same as the extension direction of the central axis of the first radiator 300, thereby facilitating the manufacture of the first radiator 300 and the second radiator 400.

[0035] Optionally, the number of slots 350 may be one; or, the number of slots 350 may be at least two, and at least two slots 350 of the first radiator 300 are evenly distributed on both sides of the central axis of the first radiator 300, thereby further extending the current path within the first radiator 300, and at least two slots 350 of the second radiator 400 are evenly distributed on both sides of the central axis of the second radiator 400, thereby further extending the current path within the second radiator 400, thereby making the UWB antenna more miniaturized.

[0036] In an optional embodiment, a first avoidance opening 360 is provided at one end of the first radiator 300 facing the second surface 130, and a second avoidance opening 410 is provided at one end of the second radiator 400 facing away from the second surface 130. The first avoidance opening 360 and the second avoidance opening 410 both extend along the extension direction of the central axis of the first radiator 300. The first radiator 300 and the second radiator 400 are plugged together through the first avoidance opening 360 and the second avoidance opening 410, and the second avoidance opening 410 is located above the first avoidance opening 360. In this solution, the first avoidance opening 360 of the first radiator 300 and the second avoidance opening 410 of the second radiator 400 both extend along the extension direction of the central axis of the first radiator 300. At this time, the weight on both sides of the first avoidance opening 360 of the first radiator 300 is approximately equal, and the weight on both sides of the second avoidance opening 410 of the second radiator 400 is approximately equal, which is conducive to improving the stability of the first radiator 300 and the second radiator 400; in addition, this arrangement can extend the current path at the central axis of the first radiator 300 and the central axis of the second radiator 400, thereby further improving the out-of-roundness of the UWB antenna. Of course, there can be a certain distance between the extension direction of the first avoidance opening 360 and the extension direction of the second avoidance opening 410 and the extension direction of the central axis of the first radiator 300.

[0037] In an optional embodiment, the first radiator 300 and the second radiator 400 may be located as a whole outside the through hole; or, a portion of the first radiator 300 and a portion of the second radiator 400 are located in the through hole 110, and the end of the first radiator 300 facing the second surface 130 has a first fixing portion 370, and the first fixing portion 370 is provided with a portion of the first avoidance opening 360, and the end of the second radiator 400 facing the second surface 130 has a second fixing portion 420, and optionally, the through hole 110 may be a circular hole, a rectangular hole, etc.; or, in other embodiments, the through hole 110 includes the corresponding The mutually perpendicular and interconnected first bar hole 111 and second bar hole 112, i.e., the through hole 110, are in a cross-shaped structure. The first fixing portion 370 is inserted into the first bar hole 111. At this time, the circumference of the first fixing portion 370 contacts the inner wall of the first bar hole 111. The connection area between the two is large, which is beneficial to improving the stability of the first radiator 300. The second fixing portion 420 is inserted into the second bar hole 112. At this time, the circumference of the second fixing portion 420 contacts the inner wall of the second bar hole 112. The connection area between the two is large, which is beneficial to improving the stability of the second radiator 400. Both the first fixing portion 370 and the second fixing portion 420 are provided with a feeding port 310.

[0038] In a further optional embodiment, the substrate 100 includes a main body 140. Optionally, the main body 140 can be made of an insulating material, such as FR-4 glass fiber board, ceramic, etc. Of course, it can also be made of other materials, which is not specifically limited here. Optionally, the through hole 110 can be opened on the main body 140, and the first fixing part 370 and the second fixing part 420 can be bonded or interference fit with the inner wall of the through hole 110; or, in other embodiments, the substrate 100 also includes a solder pad 150, which is arranged on the main body 140, and the solder pad 150 is provided with a through hole 110, and the UWB antenna also includes a welding part 500. Optionally, the welding part 500 can be solder, which has the characteristics of low melting point, good ductility and weldability, and low price. The first fixing portion 370 and the second fixing portion 420 are both welded to the pad 150 via the welding piece 500, which not only improves the connection reliability between the first radiator 300 and the second radiator 400, but also the pad 150 has the characteristic of smooth impedance, which is beneficial to reduce the sharp jump of impedance, thereby avoiding reflection caused by the sudden decrease of line width during signal transmission.

[0039] Optionally, both the end face of the first fixing portion 370 and the end face of the second fixing portion 420 can be planes, in which case the welding piece 500 is located in the first avoidance opening 360; or, in another embodiment, both the end face of the first fixing portion 370 and the end face of the second fixing portion 420 are provided with a first accommodating groove 371, the inner wall of the first accommodating groove 371 is provided with a feeding port 310, the inner wall of the first avoidance opening 360 is provided with a second accommodating groove 361, the second accommodating groove 361 is spaced apart from the first accommodating groove 371, and the second accommodating groove 361 is connected to the first accommodating groove 371 through the first avoidance opening 360, and welding pieces 500 are provided in the first accommodating groove 371, the first avoidance opening 360, and the second accommodating groove 361, that is, the welding piece 500 can be in an I-shaped structure, in which case not only the connection area of ​​the welding piece 500 can be increased, but also the I-shaped welding piece 500 has a positioning function, thereby greatly improving the stability of the first radiator 300 and the second radiator 400.

[0040] Optionally, the groove bottom of the first accommodating groove 371 of the second fixing portion 420 may be provided with an avoidance notch 372 , and the welding piece 500 may also be provided in the avoidance notch 372 , thereby further improving the welding firmness of the welding piece 500 .

[0041] Optionally, the UWB antenna also includes a feed source 600, which has a connecting column, at least a portion of which is inserted into the first avoidance opening 360 and the avoidance gap 372. At this time, the welding part 500 can wrap at least a portion of the connecting column, and the connecting column and the feeding port 310 of the first radiator 300 and the feeding port 310 of the second radiator 400 are electrically connected through the welding part 500 to feed the first radiator 300 and the second radiator 400.

[0042] Optionally, the first surface 120 is a reflective surface. In this case, the electromagnetic waves radiated by the first radiator 300 and the second radiator 400 toward the substrate 100 are reflected by the reflective surface, so that this part of the electromagnetic waves is radiated in a direction away from the substrate 100, thereby achieving the effect of gathering the electromagnetic waves and further improving the radiation performance of the UWB antenna.

[0043] Optionally, a metal film can be electroplated on the first surface 120 to make the first surface 120 a reflective surface, thereby forming a directional antenna, which has a strong signal focusing capability, is highly resistant to electromagnetic noise, deceptive interference, etc., and can reduce the range of electromagnetic waves passing through walls or directly moving to a certain extent, which is beneficial to improving communication security and privacy protection.

[0044] Optionally, the first radiator 300 and the second radiator 400 may both be disposed in the edge region of the second surface 130; or, in other embodiments, the first radiator 300 and the second radiator 400 are both disposed in the central region of the second surface 130, that is, the first radiator 300 and the second radiator 400 are both located in the central region of the first surface 120. Since the electromagnetic waves radiated by the first radiator 300 and the second radiator 400 are scattered around themselves, the reflective surface can reflect more electromagnetic waves, thereby improving the radiation performance of the UWB antenna.

[0045] Optionally, the cross-sectional shape of the substrate 100 may be circular, that is, the reflective surface may be a circular surface, and the electromagnetic waves radiated by the first radiator 300 and the second radiator 400 are scattered with themselves as the center, and the electromagnetic waves are distributed in a circular manner in a plane parallel to the second surface 130. Therefore, by setting the reflective surface as a circular surface, the reflective surface is adapted to the distribution of the electromagnetic waves, thereby improving the reflection effect and structural utilization of the reflective surface. Of course, the reflective surface may also be a rectangular surface. In this case, on the basis of ensuring the reflection effect, the utilization rate of the reflective surface is not as high as when the reflective surface is a circular surface.

[0046] In an optional embodiment, at least one of the end of the first radiator 300 away from the central axis thereof and the end of the second radiator 400 away from the central axis thereof is provided with a support portion, and the support portion is supported on the second surface 130, thereby further improving the stability of the first radiator 300 and the second radiator 400. Of course, the support portion may also be provided close to the central axis of the first radiator 300 or the central axis of the second radiator 400.

[0047] Optionally, the support portion and the second surface 130 may simply be in contact with each other, or may be connected via a connecting member, and this embodiment of the present application does not impose any specific limitation on this.

[0048] Based on the UWB antenna disclosed in this application, refer to Figure 7 It can be seen that the reflection coefficient is less than -10dB in the 5.07-11.34GHz frequency band, and the bandwidth is 76.4%. Fig.10 It can be seen that within the 5.07-11.34 GHz frequency band, the gain is greater than 3 dB, and within the 5.5-10 GHz frequency band, the out-of-roundness is less than 3 dB, and the antenna out-of-roundness is good.

[0049] 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 grounding body (200), a first radiator (300) and a second radiator (400), wherein the substrate (100) is provided with a through hole (110), the substrate (100) has a first surface (120) and a second surface (130) which are arranged opposite to each other, the grounding body (200) is arranged on the first surface (120), the first radiator (300) and the second radiator (400) are both arranged on the second surface (130), the first radiator (300) and the second radiator (400) intersect and are plug-fitted, the central axis of the first radiator (300) is colinear with the central axis of the second radiator (400), the central axis of the first radiator (300) and the central axis of the second radiator (400) are both provided with a feeding port (310), and the feeding port (310) is fed through the through hole (110).

2. The UWB antenna according to claim 1, characterized in that: The first radiator (300) and the second radiator (400) are both flat plate structures, and the first radiator (300) and the second radiator (400) are arranged vertically.

3. The UWB antenna according to claim 1, characterized in that: The first radiator (300) and the second radiator (400) are both axisymmetric structures, and a first symmetry axis of the first radiator (300) and a second symmetry axis of the second radiator (400) both coincide with the central axis of the first radiator (300).

4. The UWB antenna according to claim 3, characterized in that: Both sides of the first symmetry axis of the first radiator (300) and both sides of the second symmetry axis of the second radiator (400) have a first edge (320), a second edge (330) and a third edge (340) connected in sequence, the first edge (320), the second edge (330) and the third edge (340) are all facing the second surface (130), the first edge (320) and the third edge (340) are both parallel to the second surface (130), the distance between the first edge (320) and the second surface (130) is greater than the distance between the third edge (340) and the second surface (130), and the second edge (330) is inclined relative to the second surface (130).

5. The UWB antenna according to claim 1, characterized in that: One end of the first radiator (300) facing the second surface (130) and one end of the second radiator (400) facing the second surface (130) are both provided with a gap (350), and the extension direction of the gap (350) is the same as the extension direction of the central axis of the first radiator (300).

6. The UWB antenna according to claim 1, characterized in that: A first avoidance opening (360) is provided at one end of the first radiator (300) facing the second surface (130), and a second avoidance opening (410) is provided at one end of the second radiator (400) facing away from the second surface (130). Both the first avoidance opening (360) and the second avoidance opening (410) extend along the extension direction of the central axis of the first radiator (300). The first radiator (300) and the second radiator (400) are plugged together through the first avoidance opening (360) and the second avoidance opening (410), and the second avoidance opening (410) is located above the first avoidance opening (360).

7. The UWB antenna according to claim 6, characterized in that: Part of the first radiator (300) and part of the second radiator (400) are both located in the through hole (110); the first radiator (300) has a first fixing portion (370) at one end facing the second surface (130); the first fixing portion (370) is provided with a portion of the first avoidance opening (360); the second radiator (400) has a second fixing portion (420) at one end facing the second surface (130); the through hole (110) includes a first strip hole (111) and a second strip hole (112) which are perpendicular to each other and connected; the first fixing portion (370) is plugged into the first strip hole (111); the second fixing portion (420) is plugged into the second strip hole (112); and the first fixing portion (370) and the second fixing portion (420) are both provided with the feeding port (310).

8. The UWB antenna according to claim 7, characterized in that: The substrate (100) comprises a main body (140) and a soldering pad (150), wherein the soldering pad (150) is arranged on the main body (140), and the soldering pad (150) is provided with the through hole (110). The UWB antenna also comprises a welding part (500), and the first fixing part (370) and the second fixing part (420) are both welded to the soldering pad (150) via the welding part (500).

9. The UWB antenna according to claim 8, characterized in that: The end faces of the first fixing portion (370) and the end faces of the second fixing portion (420) are both provided with a first accommodating groove (371); the inner wall of the first accommodating groove (371) is provided with the feeding port (310); the inner wall of the first avoidance opening (360) is provided with a second accommodating groove (361); the second accommodating groove (361) is spaced apart from the first accommodating groove (371), and the second accommodating groove (361) is connected to the first accommodating groove (371) through the first avoidance opening (360); the first accommodating groove (371), the first avoidance opening (360) and the second accommodating groove (361) are all provided with the welding piece (500).

10. The UWB antenna according to claim 1, characterized in that: The first surface (120) is a reflective surface; The first radiator (300) and the second radiator (400) are both arranged in a central area of ​​the second surface (130).

11. The UWB antenna according to claim 1, characterized in that: At least one of an end of the first radiator (300) away from the central axis thereof and an end of the second radiator (400) away from the central axis thereof is provided with a support portion, and the support portion is supported on the second surface (130).

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