CN113506978A

CN113506978A - On-vehicle V2X antenna, glass unit and vehicle

Info

Publication number: CN113506978A
Application number: CN202110670690.1A
Authority: CN
Inventors: 董梦银; 班涛; 林勇
Original assignee: Fuyao Glass Industry Group Co Ltd
Current assignee: Fuyao Glass Industry Group Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-10-15
Anticipated expiration: 2041-06-17
Also published as: WO2022262860A1; CN113506978B

Abstract

The invention discloses a vehicle-mounted V2X antenna, a glass assembly and a vehicle. The vehicle-mounted V2X antenna is arranged on the inner side of the glass of the vehicle and comprises: the antenna comprises a first radiator, a second radiator, a dielectric plate and a feed source. The first radiator and the second radiator are fixed on the dielectric plate and arranged in parallel, or the first radiator and the second radiator are connected in an included angle. The feed source is connected with the first radiator or/and the second radiator, and the first radiator and the second radiator enable the V2X antenna to have horizontal omnidirectional performance. The vehicle-mounted V2X antenna provided by the invention can solve the technical problems of limited placement position, complex installation process and poor communication performance of a V2X antenna in the existing vehicle.

Description

On-vehicle V2X antenna, glass unit and vehicle

Technical Field

The invention relates to the technical field of antennas, in particular to a vehicle-mounted V2X antenna, a glass assembly and a vehicle.

Background

The Vehicle networking (V2X, Vehicle-to-evolution) establishes a new Vehicle technology development direction by integrating a Global Positioning System (GPS) navigation technology, a Vehicle-to-Vehicle communication technology, a wireless communication and a remote sensing technology, realizes the compatibility of manual driving and automatic driving, and has outstanding advantages in the aspects of improving traffic efficiency, improving driving safety, reducing accident rate, saving energy, reducing emission and the like. The vehicle-mounted V2X antenna of prior art is generally installed in the external shark fin of vehicle, and external shark fin can influence the appearance design of automobile body, increases the wind resistance of car when increasing the design degree of difficulty, but places the V2X antenna in the automobile body in, then can influence the communication performance of V2X antenna.

Disclosure of Invention

The invention provides a vehicle-mounted V2X antenna and a vehicle, and aims to solve the technical problems that the mounting position of a V2X antenna in the existing vehicle is limited, the mounting process is complex, and the communication performance is poor.

In order to solve the above problem, the present application provides an on-vehicle V2X antenna, adorn in the vehicle glass inboard, on-vehicle V2X antenna includes: the antenna comprises a first radiator, a second radiator, a dielectric plate and a feed source. The first radiator and the second radiator are fixed on the dielectric slab, the first radiator and the second radiator are arranged in parallel, or the first radiator and the second radiator are connected in an included angle. The feed source is connected with the first radiator or/and the second radiator, and the first radiator and the second radiator enable the V2X antenna to have horizontal omnidirectional performance.

In an embodiment, the dielectric plate includes a first dielectric plate and a second dielectric plate, the first dielectric plate is disposed along a first direction, the first dielectric plate includes a first surface and a second surface opposite to the first surface, the second dielectric plate is perpendicularly connected to the second surface of the first dielectric plate, the first radiator is disposed on the first surface, the second radiator is disposed on the surface of the second dielectric plate, and the second radiator is connected to the first radiator.

In one embodiment, the first radiator is a sheet body with a hollow structure in the middle.

In one embodiment, the first radiator includes an annular arm and a connecting arm, the connecting arm is "S" shaped, the connecting arm is located in a circular ring of the annular arm, and opposite ends of the connecting arm are respectively connected to the annular arm.

In one embodiment, the vehicle-mounted V2X antenna further includes a first ground plate disposed on a surface of the second dielectric plate opposite to the second radiator, and the feed source is connected between the first ground plate and the second radiator.

In an embodiment, the dielectric board is disposed along a first direction, the dielectric board includes a third surface and a fourth surface opposite to the third surface, the first radiator is disposed on the third surface, the second radiator is disposed on the fourth surface, and the first radiator and the second radiator are parallel.

In one embodiment, the first radiator includes a first body, a first radiating arm and a second radiating arm, the first radiating arm and the second radiating arm are parallel, and the first body connects the first radiating arm and the second radiating arm. The second radiator comprises a second main body, a third radiating arm and a fourth radiating arm, the third radiating arm is parallel to the fourth radiating arm, and the second main body is connected with the third radiating arm and the fourth radiating arm. The third radiation arm and the fourth radiation arm are arranged in a staggered mode with the first radiation arm and the second radiation arm along the projection of the second direction on the plane where the first radiation body is located, and the second direction is perpendicular to the first direction.

In one embodiment, the first radiator is in a shape of a letter "Z", and the second radiator has a shape identical to a mirror image of the letter "N".

In one embodiment, the feed source is a coaxial feed line, and the coaxial feed line includes a coaxial outer core and a coaxial inner core, the coaxial inner core is electrically connected to the first main body, and the coaxial outer core is electrically connected to the second main body, so that currents of the first radiating arm, the second radiating arm, the third radiating arm, and the fourth radiating arm are in the same direction.

In one embodiment, the dielectric board is disposed along the second direction, the dielectric board includes a side surface, and the first radiator and the second radiator are disposed at an interval on the side surface.

In one embodiment, the first radiator comprises a first top side, a first bottom side and a second side which are sequentially connected end to end; the second radiator comprises a second top edge, a third side edge, a second bottom edge and a fourth side edge which are sequentially connected end to end. The first radiator and the second radiator are provided with a gap therebetween, the first bottom edge and the second top edge are located on two opposite sides of the gap, and the first radiator and the second radiator are opposite to the gap in axial symmetry.

In one embodiment, the in-vehicle V2X antenna further includes a third ground plate disposed in a direction parallel to the second base edge, and the second base edge is electrically connected to the third ground plate.

In one embodiment, the vehicle-mounted V2X antenna further includes a feed structure, and the feed is disposed in a gap between the first radiator and the second radiator and feeds power from the gap to the first radiator and the second radiator, respectively.

The invention also provides a glass assembly which comprises a glass piece and the vehicle-mounted V2X antenna.

In one embodiment, the glass assembly further comprises a packaging box, the packaging box comprises a bottom wall and an opening opposite to the bottom wall, the packaging box is fixed on the inner surface of the glass piece in the direction of the opening towards the glass piece, the bottom wall is parallel to the inner surface, and the V2X antenna is contained in the packaging box.

The invention also provides a vehicle comprising the glass assembly.

In conclusion, the vehicle-mounted V2X antenna provided by the invention is simple in structure and convenient to install, can be installed on the inner surface of a vehicle skylight glass, is stable in horizontal omnidirectional performance, and can realize stable V2X communication performance.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a glass subassembly including an onboard V2X antenna according to one embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the vehicle V2X antenna of FIG. 1;

FIG. 3 is a plot of return loss S11 for the glass package of FIG. 1 including the vehicle mounted V2X antenna;

FIG. 4 is a horizontal gain diagram of the glass subassembly of FIG. 1 including the vehicle V2X antenna;

FIG. 5 is a graph of in-band gain for the glass subassembly of FIG. 1 including an in-vehicle V2X antenna, wherein the abscissa is frequency and the ordinate is linear average gain;

FIG. 6 is a schematic structural diagram of a glass assembly including an onboard V2X antenna according to a second embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of the vehicle V2X antenna of FIG. 6;

FIG. 8 is an enlarged view of a portion of the vehicle mounted V2X antenna of FIG. 6;

FIG. 9 is a partial enlarged view of another perspective of the vehicle V2X antenna of FIG. 6;

FIG. 10 is a plot of return loss S11 for the glass subassembly of FIG. 6 including the vehicle mounted V2X antenna;

FIG. 11 is a horizontal gain diagram of the glass subassembly of FIG. 6 including the vehicle V2X antenna;

FIG. 12 is a graph of in-band gain for the glass subassembly of FIG. 6 including an in-vehicle V2X antenna, with frequency on the abscissa and linear average gain on the ordinate;

FIG. 13 is a schematic structural diagram of a glass subassembly including an onboard V2X antenna according to a third embodiment of the present invention;

FIG. 14 is an enlarged view of a portion of the vehicle mounted V2X antenna of FIG. 13;

FIG. 15 is a return loss S11 plot of the glass subassembly of FIG. 13 including the vehicle mounted V2X antenna;

FIG. 16 is a horizontal gain diagram of the glass subassembly of FIG. 13 including the vehicle V2X antenna;

FIG. 17 is a graph of in-band gain for the glass subassembly of FIG. 13 including an in-vehicle V2X antenna, with frequency on the abscissa and linear average gain on the ordinate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A vehicle includes a glass assembly. The glass assembly is mounted on the roof of a Vehicle to implement a Vehicle networking (V2X) function of the Vehicle.

Referring to fig. 1, the present invention further provides a glass assembly 500, wherein the glass assembly 500 is applied to the vehicle. The glass subassembly 500 includes a glass piece 200 and a vehicle mounted V2X antenna 100. In this embodiment, the glass member 200 is a roof window of a vehicle, and in other embodiments, the glass member may be a windshield or other glass of the vehicle.

Specifically, the glass piece 200 includes a front glass 201, an intermediate layer 202, and a back glass 203. The interlayer 202 is sandwiched between the front glass 201 and the back glass 203. In this embodiment, the interlayer 202 is a packaging adhesive film made of polyvinyl butyral (PVB). The use of PVB as the interlayer 202 can effectively improve the strength and toughness of the glass piece 200, and can also improve the impact resistance and safety of the glass piece 200. The glass piece 200 further comprises an inner surface 204 and an outer surface 205 opposite to the inner surface 204, the outer surface 205 being the surface of the front glass 201 facing away from the interlayer 202, and the inner surface 204 being the surface of the back glass 203 facing away from the interlayer 202. When the glass assembly 500 is installed on the roof of a vehicle, the outer surface 205 faces the exterior of the vehicle and the inner surface 204 faces the interior of the vehicle.

In one embodiment, the glass subassembly 500 further includes an enclosure 300. The packaging box 300 is made of plastics and other non-metals. The packaging box 300 comprises a bottom wall 301 and an opening 302 opposite to the bottom wall 301, the packaging box 300 is fixed on the inner surface 204 of the glass piece 200 with the opening 302 facing the direction of the glass piece 200, the bottom wall 301 is parallel to the inner surface 204, and the V2X antenna is accommodated in the packaging box 300. Specifically, the sealing box 300 can be fixed to the black edge area of the glass member 200 by screwing, welding, or adhering, as long as the sealing and fixing can be performed on the inner surface 204 of the glass member 200. In this embodiment, the packaging box 300 protects the vehicle-mounted V2X antenna 100, and does not affect the communication performance of the vehicle-mounted V2X antenna 100.

For convenience of description, a direction parallel to the inner surface 204 is defined as a first direction X, and a direction perpendicular to the inner surface 204 is defined as a second direction Y.

The structure of the vehicle-mounted V2X antenna 100 will be described in detail below.

Referring to fig. 1, the vehicle-mounted V2X antenna 100 includes a first radiator 10, a second radiator 20, a dielectric board 30 and a feed source, the first radiator 10 and the second radiator 20 are fixed on the dielectric board 30, and the first radiator 10 and the second radiator 20 are arranged in parallel. In other embodiments, the first radiator 10 and the second radiator 20 may be connected at an included angle. The feed is connected to the first radiator, and the first radiator 10 and the second radiator 20 enable the V2X antenna to have horizontal omnidirectional performance. In other embodiments, the feed source may also be connected to the first radiator, or both the first radiator and the second radiator.

The vehicle-mounted V2X antenna 100 provided by the invention is simple in structure and convenient to install, can be installed on the inner surface 204 of a vehicle skylight glass, and the vehicle-mounted V2X antenna 100 is stable in horizontal omnidirectional performance and can realize stable V2X communication performance.

Referring to fig. 1, in one embodiment, the dielectric plate 30 includes a first dielectric plate 31 and a second dielectric plate 32, and the first dielectric plate 31 is disposed along the first direction X. The first dielectric plate 31 includes a first surface 311 and a second surface 312, and a first through hole (not shown) is provided on the first dielectric plate 31, and the first through hole penetrates through the first surface 311 and the second surface 312. The second dielectric plate 32 is perpendicularly connected to the second surface 312 of the first dielectric plate 31. The first radiator 10 is disposed on the first surface 311 of the first dielectric board 31, the second radiator 20 is disposed on the surface of the second dielectric board 32, and the first radiator 10 is vertically connected to the second radiator 20. In other embodiments, the first radiator and the second radiator may be connected at an obtuse angle or an acute angle. In this embodiment, the first radiator 10 and the second radiator 20 jointly enable the vehicle-mounted V2X antenna 100 to have a horizontal omnidirectional performance, and a capacitor and an inductor are formed between the first radiator 10 and the second radiator 20 while the first radiator 10 participates in radiation, so as to achieve adjustment of impedance. The vehicle-mounted V2X antenna 100 may be suitable for use in a scenario where there is no sheet metal or other antenna extending along the second direction Y around the vehicle-mounted V2X antenna 100. The "periphery of the vehicle-mounted V2X antenna" referred to herein means within one wavelength range centered on the vehicle-mounted V2X antenna 100. Meanwhile, a second radiator 20 is vertically arranged at one end of the first radiator 10 to form a top-added antenna, so that the effective height of the vehicle-mounted V2X antenna 100 is increased, and the size of the vehicle-mounted V2X antenna 100 is reduced.

Specifically, the shape of the first radiator is not specifically limited, and may be a circular sheet, an elliptical sheet, or a polygonal sheet. The middle of the first radiator can be grooved to form a hollow structure and can also be a solid sheet body. Referring to fig. 1 and 2, in the present embodiment, the first radiator 10 is a circular sheet with a hollow structure a. The first radiator 10 includes an annular arm 11 and a connecting arm 12, the annular arm 11 is circular, the connecting arm 12 is "S" type, and the "S" type connecting arm 12 is located in the middle of the circular ring of the annular arm 11, and the opposite ends of the connecting arm 12 are connected with the annular arm 11 respectively. The second radiator 20 is a whip antenna deformation structure. The second radiator 20 includes a body having a rectangular sheet shape and a connection section having a strip shape and connected to one end of the body. The first radiator 10 is disposed on the first surface 311 of the first dielectric plate 31, and the center of the first radiator 10 is aligned with the first through hole. The body of the second radiator 20 is disposed on the surface of the second dielectric board 32, and the connection segment passes through the first through hole from the second surface 312 and is connected to the center of the connection arm 12 of the first radiator 10.

In one embodiment, the vehicle-mounted V2X antenna 100 further includes a first ground plate 40, where the first ground plate 40 is disposed on a surface of the second dielectric plate 32 opposite to the second radiator 20. The feed source is connected between the second radiator 20 and the first ground plate 40, and is configured to feed the second radiator 20. In this embodiment, the feed source is a microstrip feed line. In other embodiments, the feed may also be a coaxial feed. The current of the vehicle-mounted V2X antenna 100 flows from the feed source to the body of the second radiator 20, then flows from the body to the connecting segment, then flows from the connecting segment to the connecting arm 12 of the first radiator 10, and on the connecting arm 12, the current is transmitted from the center of the connecting arm 12 to both ends, and then is transmitted to the annular arm 11 of the first radiator 10.

Further, in this embodiment, one end of the second dielectric plate 32, which is far away from the first dielectric plate 31, is fixed to the bottom wall 301 of the packaging box 300, so that the vehicle-mounted V2X antenna 100 is fixed in the packaging box 300. The distance from the first radiator 10 to the inner surface 204 of the glass piece 200 is 1 mm. In other embodiments, the distance from the first radiator 10 to the inner surface 204 of the glass piece 200 may be greater than 1mm, or less than 1 mm. In one embodiment, the vehicle-mounted V2X antenna 100 may also be fixed by directly bonding the first radiator 10 to the inner surface 204 of the glass member 200 to fix the vehicle-mounted V2X antenna 100.

Referring to fig. 3, in this embodiment, the operating frequency band of the vehicle-mounted V2X antenna 100 is 5.5GHz to 6.53GHz, and can satisfy the frequency band 5.9GHz to 5.925GHz for the V2X antenna to implement communication.

Referring to fig. 4, the minimum gain value of the vehicle-mounted V2X antenna 100 in the planes of 80 °, 90 °, and 96 ° is 0.36dB, the maximum gain is 4.58dB, and the vehicle-mounted V2X antenna 100 has good horizontal plane omni-directional performance.

Referring to fig. 5, the linear average gain of the vehicle-mounted V2X antenna 100 in the horizontal plane in the frequency band of 5.9 GHz-5.925 GHz increases with increasing frequency. When the frequency is 5.9GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is 2.51dB, and when the frequency is 5.925GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is 2.54 dB. That is to say, the linear average gain of the vehicle-mounted V2X antenna 100 on the horizontal plane in the frequency band of 5.9 GHz-5.925 GHz is 2.51 dB-2.54 dB. The flatness of the in-band gain is less than or equal to 1dB, the V2X index is met, and the vehicle-mounted V2X antenna 100 can realize V2X communication.

Referring to fig. 6, in another embodiment of the present application, the first radiator 10 and the second radiator 20 are both sheet-shaped bodies. The dielectric plate 30 is disposed along the first direction X, and the dielectric plate 30 includes a third surface 33 and a fourth surface 34 opposite to the third surface 33. The first radiator 10 is disposed on the third surface 33, the second radiator 20 is disposed on the fourth surface 34, and the first radiator 10 and the second radiator 20 are parallel. In this embodiment, the first radiator 10 and the second radiator 20 jointly enable the vehicle-mounted V2X antenna 100 to have a horizontal omnidirectional performance, and the vehicle-mounted V2X antenna 100 is a planar antenna, which may be suitable for a scenario where a sheet metal part or another antenna extending along the second direction Y is disposed around the vehicle-mounted V2X antenna 100. The phrase "the periphery of the vehicle-mounted V2X antenna 100" as used herein means within one wavelength range centered on the vehicle-mounted V2X antenna 100. By setting the vehicle-mounted V2X antenna 100 as a planar antenna, the influence of sheet metal parts around the vehicle-mounted V2X antenna 100 or the V2X antenna along the second direction Y on the horizontal omni-directional performance of the vehicle-mounted V2X antenna 100 can be effectively reduced, and a good out-of-roundness index is realized.

Specifically, referring to fig. 7 to 9, the first radiator 10 is "Z" shaped. The first radiator 10 includes a first body 13, a first radiating arm 14, and a second radiating arm 15. The first radiating arm 14 includes a first connecting end 141 and a first free end 142, and the second radiating arm 15 includes a second connecting end 151 and a second free end 152. The first radiating arm 14 and the second radiating arm 15 are disposed in parallel, the first free end 142 is disposed opposite to the second connection end 151, and the second free end 152 is disposed opposite to the first connection end 141. The first body 13 includes a first end 131 and a second end 132, the first end 131 is connected to the first connection end 141, and the second end 132 is connected to the second connection end 151. The shape of the second radiator 20 is the same as the mirror image of the N-shape. The second radiator 20 includes a second body 23, a third radiating arm 24 and a fourth radiating arm 25, the third radiating arm 24 includes a third connecting end 241 and a third free end 242, and the fourth radiating arm 25 includes a fourth connecting end 251 and a fourth free end 252. The third radiating arm 24 and the fourth radiating arm 25 are disposed in parallel, the third free end 242 is disposed opposite to the fourth connecting end 251, and the fourth free end 252 is disposed opposite to the third connecting end 241. The second body 23 includes a third end 231 and a fourth end 232, the third end 231 is connected to the third connection end 241, and the fourth end 232 is connected to the fourth connection end 251. The second body 23 is centrally provided with an insulation hole 233.

Referring to fig. 6 to 9, a second through hole (not shown) is formed on the dielectric plate 30, and the second through hole penetrates through the third surface 33 and the fourth surface 34. The first radiator 10 is disposed on the third surface 33, and the center of the first radiator 10 is aligned with the second through hole. The second radiator 20 is disposed on the fourth surface 34, and the insulation hole 233 is aligned with the second through hole. The projection of the second body 23 on the plane where the first radiator 10 is located along the second direction Y coincides with the first body 13. The projections of the third radiating arm 24 and the fourth radiating arm 25 on the plane where the first radiator 10 is located along the second direction Y are staggered with the first radiating arm 14 and the second radiating arm 15. In this embodiment, the projections of the third radiating arm 24 and the fourth radiating arm 25 on the plane where the first radiator 10 is located along the second direction Y form four sides of a rectangle with the first radiating arm 14 and the second radiating arm 15. In other embodiments, the projections of the third radiating arm and the fourth radiating arm on the plane where the first radiator is located along the second direction, and the first radiating arm and the second radiating arm may also form four sides of other centrosymmetric polygons with even number of sides, such as a hexagon, an octagon, and the like. In this embodiment, the feed source is a coaxial feed line 50, and the coaxial feed line 50 includes a coaxial outer core 52 and a coaxial inner core 51. An insulating layer 53 is arranged between the coaxial inner core 51 and the coaxial outer core 52, so that the coaxial outer core 52 and the coaxial inner core 51 are insulated. The material of the insulating layer 53 is not particularly limited as long as the coaxial outer core 52 and the coaxial inner core 51 are insulated from each other. The coaxial inner core 51 penetrates through the insulating hole 233 of the second radiator 20 and the second through hole of the dielectric board 30 to be connected with the center of the first radiator 10, and the coaxial inner core 51 is insulated from the second radiator 20. The coaxial outer core 52 is sleeved on the outer periphery of the coaxial inner core 51, and the coaxial outer core 52 is electrically connected with the second radiator 20.

The current of the vehicle-mounted V2X antenna 100 flows from the coaxial inner core 51 to the center of the first body 13, and is transmitted from the center of the first body 13 to the first end 131 and the second end 132. In the first radiating arm 14, current flows from the first connecting terminal 141 to the first free terminal 142, and in the second radiating arm 15, current flows from the second connecting terminal 151 to the second free terminal 152. In the second radiator 20 and the coaxial outer core 52, the current flows from the third radiation arm 24 and the fourth radiation arm 25 to the second body 23, and then flows from the second body 23 to the coaxial outer core 52. Specifically, in the third radiating arm 24, current flows from the third free end 242 to the third connecting end 241, in the fourth radiating arm 25, current flows from the fourth free end 252 to the fourth connecting end 251, and in the second body 23, current flows from the third end 231 and the fourth end 232 to the middle of the second body 23 and then flows to the coaxial outer core 52. In this embodiment, the currents of the first radiating arm 14, the second radiating arm 15, the third radiating arm 24 and the fourth radiating arm 25 are in the same direction to form a current loop, which is equivalent to a magnetic dipole, thereby realizing horizontal omni-directionality.

Further, in this embodiment, the first radiator 10 is fixed to the inner surface 204 of the glass member 200, so as to fix the vehicle-mounted V2X antenna 100. The fixing mode can be bonding, welding and the like.

Referring to fig. 10, in this embodiment, the operating frequency band of the vehicle-mounted V2X antenna 100 is 5.87GHz to 6.08GHz, and can meet the frequency band 5.9GHz to 5.925GHz for the V2X antenna to implement communication.

Referring to fig. 11, the minimum gain value of the vehicle-mounted V2X antenna 100 in the planes of 80 °, 90 ° and 96 ° is-1.65 dB, the maximum gain is 1.6dB, and the vehicle-mounted V2X antenna 100 has good horizontal plane omni-directional performance.

Referring to fig. 12, the linear average gain of the vehicle-mounted V2X antenna 100 in the horizontal plane in the frequency band of 5.9GHz to 5.925GHz increases with increasing frequency. When the frequency is 5.9GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is-0.33 dB, and when the frequency is 5.925GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is 0.33 dB. That is to say, the linear average gain of the vehicle-mounted V2X antenna 100 on the horizontal plane in the frequency band of 5.9 GHz-5.925 GHz is-0.33 dB. The flatness of the in-band gain is less than or equal to 1dB, the V2X index is met, and the vehicle-mounted V2X antenna 100 can realize V2X communication.

Referring to fig. 13, in an embodiment of the present invention, the first radiator 10 and the second radiator 20 are both solid sheet structures. The dielectric board 30 includes a first side surface 35 and a second side surface 36, and the first radiator 10 and the second radiator 20 are disposed at the first side surface 35 at intervals. In this embodiment, the dielectric board is disposed along a second direction Y, the first side surface 35 and the second side surface 36 are parallel to the second direction Y, and the first radiator 10 and the second radiator 20 are disposed at intervals along the second direction Y on the first side surface 35. In other embodiments, the first radiator 10 and the second radiator 20 may also be disposed on the second side surface 36 at intervals along the second direction Y. In this embodiment, the first radiator 10 and the second radiator 20 jointly enable the vehicle-mounted V2X antenna 100 to have a horizontal omnidirectional performance. The vehicle-mounted V2X antenna 100 may be suitable for use in a scenario where there is no sheet metal or other antenna extending along the second direction Y around the vehicle-mounted V2X antenna 100. The phrase "the periphery of the vehicle-mounted V2X antenna 100" as used herein means within one wavelength range centered on the vehicle-mounted V2X antenna 100.

Specifically, referring to fig. 13 and 14, the first radiator 10 includes a first top side 16, a first bottom side 17, a first side 18 and a second side 19. The first top edge 16, the second side edge 19, the first bottom edge 17 and the first side edge 18 are connected end to form a periphery of the first radiator 10. The first top edge 16 and the first bottom edge 17 are both straight lines, and the first top edge 16 is parallel to the first bottom edge 17. The first side edge 18 and the second side edge 19 are both arc-shaped, and the curvature of the arc-shaped first side edge 18 and the arc-shaped second side edge 19 gradually increases from the end connected with the first bottom edge 17 to the end connected with the first top edge 16. The second radiator 20 includes a second top edge 26, a second bottom edge 27, a third side edge 28, and a fourth side edge 29. The second top edge 26, the fourth side edge 29, the second bottom edge 27, and the third side edge 28 are connected end to form a periphery of the second radiator 20. The second top edge 26 and the second bottom edge 27 are both straight lines, and the second top edge 26 is parallel to the second bottom edge 27. The third side edge 28 and the fourth side edge 29 are both arc-shaped, and the curvature of the arc-shaped third side edge 28 and the arc-shaped fourth side edge 29 gradually increases from the end connected with the second top edge 26 to the end connected with the second bottom edge 27. In other embodiments, the first side, the second side, the third side and the fourth side may also be linear, and the first radiator and the second radiator are both quadrilateral.

The first radiator 10 and the second radiator 20 are disposed at the first side 35 along the second direction Y at intervals, a gap B is formed between the first radiator 10 and the second radiator 20, the first radiator 10 and the second radiator 20 are symmetric to each other about the gap B, and the first bottom side 17 is opposite to the second top side 26. The first side 18, the third side 28, the second side 19 and the fourth side 29 form a hyperbolic structure. As used herein, "hyperbolic" means that the overall profile resembles a hyperbolic structure, and the two curves may be discontinuous curves. In this embodiment, the first side 18 and the third side 28 form one of the curves in the hyperbolic structure, and a gap B is formed between the first side 18 and the third side 28. The second side 19 and the fourth side 29 form another branch curve in the hyperbolic structure, and a gap B is provided between the second side 19 and the fourth side 29. In this embodiment, the vehicle-mounted V2X antenna 100 is a dipole antenna, and the operating bandwidth of the vehicle-mounted V2X antenna 100 can be increased by setting the side profiles of the first radiator 10 and the second radiator 20 to be of a hyperbolic structure.

In other embodiments, the first radiator 10 and the second radiator 20 may have other shapes, and may mainly implement V2X communication.

In one embodiment, the in-vehicle V2X antenna 100 further includes a third ground plate 41, the third ground plate 41 is disposed along a direction parallel to the second base 27, and the second base 27 is electrically connected to the third ground plate 41. In this embodiment, the second bottom side 27 of the second radiator 20 is connected to the third ground plate 41, so that the size of the vehicle-mounted V2X antenna 100 in the second direction Y can be effectively reduced according to the mirror image principle, and the vehicle-mounted V2X antenna 100 can be miniaturized.

The feed source is disposed in a gap B between the first radiator 10 and the second radiator 20, and feeds power to the first radiator 10 and the second radiator 20 from the gap B, respectively. On the surface of the first radiator 10, current is transmitted from the first bottom edge 17 to the first top edge 16 along the first side edge 18 and the second side edge 19. At the surface of the second radiator 20, the current is transmitted from the second top edge 26 to the second bottom edge 27 along the third side edge 28 and the fourth side edge 29.

Further, an end of the dielectric plate 30 away from the third ground plate 41 is fixed to the inner surface 204 of the glass member 200, and the fixing manner may be bonding, welding, or screwing.

Referring to fig. 15, the operating frequency band of the vehicle-mounted V2X antenna 100 is 5.39GHz to 6.65GHz, and can satisfy the frequency band 5.9GHz to 5.925GHz for the V2X antenna to implement communication.

Referring to fig. 16, the minimum gain value of the vehicle-mounted V2X antenna 100 in the planes of 80 °, 90 ° and 96 ° is-0.9 dB, the maximum gain is 7.8dB, and the vehicle-mounted V2X antenna 100 has good horizontal plane omni-directional performance.

Referring to fig. 17, the linear average gain of the vehicle-mounted V2X antenna 100 in the horizontal plane in the frequency band of 5.9GHz to 5.925GHz increases with increasing frequency. When the frequency is 5.9GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is 3.10dB, and when the frequency is 5.925GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is 3.11 dB. That is to say, the linear average gain of the vehicle-mounted V2X antenna 100 on the horizontal plane in the frequency band of 5.9 GHz-5.925 GHz is 3.10 dB-3.11 dB. The flatness of the in-band gain is less than or equal to 1dB, the indexes of the V2X antenna are met, and the vehicle-mounted V2X antenna 100 can realize V2X communication.

In another embodiment of the present invention, the difference from the previous embodiment is that the vehicle-mounted V2X antenna 100 may also be a monopole antenna, or a modified dipole antenna. As long as the in-vehicle V2X antenna 100 can satisfy V2X communication.

The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An on-vehicle V2X antenna, adorn in the vehicle glass inboard, characterized by, includes: first irradiator, second irradiator, dielectric plate and feed, first irradiator with the second irradiator is fixed on the dielectric plate, first irradiator with second irradiator parallel arrangement, perhaps first irradiator with the second irradiator is the contained angle and connects, the feed with first irradiator or/and the second irradiator is connected, first irradiator with the second irradiator makes the V2X antenna has horizontal omnidirectional performance.

2. The vehicle-mounted V2X antenna according to claim 1, wherein the dielectric plate includes a first dielectric plate and a second dielectric plate, the first dielectric plate is disposed along a first direction, the first dielectric plate includes a first surface and a second surface opposite to the first surface, the second dielectric plate is perpendicularly connected to the second surface of the first dielectric plate, the first radiator is disposed on the first surface, the second radiator is disposed on the surface of the second dielectric plate, and the second radiator is connected to the first radiator.

3. The vehicle-mounted V2X antenna of claim 2, wherein the first radiator is a sheet with a hollow structure in the middle.

4. The vehicular V2X antenna of claim 3, wherein the first radiator comprises an annular arm and a connecting arm, the connecting arm is "S" shaped, the connecting arm is located in a circular ring of the annular arm, and opposite ends of the connecting arm are respectively connected to the annular arm.

5. The vehicle V2X antenna of claim 4, wherein the vehicle V2X antenna further comprises a first ground plate disposed on a surface of the second dielectric plate opposite the second radiator, and the feed is connected between the first ground plate and the second radiator.

6. The vehicle-mounted V2X antenna according to claim 1, wherein the dielectric plate is disposed along a first direction, the dielectric plate includes a third surface and a fourth surface opposite to the third surface, the first radiator is disposed on the third surface, the second radiator is disposed on the fourth surface, and the first radiator and the second radiator are parallel.

7. The vehicular V2X antenna of claim 6, wherein the first radiator comprises a first body, a first radiating arm, and a second radiating arm, the first and second radiating arms being parallel, the first body connecting the first and second radiating arms; the second radiator comprises a second main body, a third radiating arm and a fourth radiating arm, the third radiating arm and the fourth radiating arm are parallel, and the second main body is connected with the third radiating arm and the fourth radiating arm; the third radiation arm and the fourth radiation arm are arranged in a staggered mode with the first radiation arm and the second radiation arm along the projection of the second direction on the plane where the first radiation body is located, and the second direction is perpendicular to the first direction.

8. The vehicular V2X antenna of claim 7, wherein the first radiator is "Z" shaped, and the second radiator has the same shape as a mirror image of the "N" shape.

9. The vehicular V2X antenna of claim 7 or 8, wherein the feed is a coaxial feed comprising a coaxial outer core and a coaxial inner core, the coaxial inner core being electrically connected to the first body, the coaxial outer core being electrically connected to the second body to co-direct current flow of the first, second, third and fourth radiating arms.

10. The vehicle-mounted V2X antenna of claim 1, wherein the dielectric plate includes a side surface, and the first radiator and the second radiator are spaced apart from each other on the side surface.

11. The vehicular V2X antenna of claim 10, wherein the first radiator comprises a first top edge, a first side edge, a first bottom edge, and a second side edge connected end to end in this order; the second irradiator is including second topside, third side, second base and the fourth side of end to end connection in proper order, first irradiator with the second irradiator has the clearance between, first base with the second topside is located the relative both sides in clearance, just first irradiator with the second irradiator is relative clearance axial symmetry.

12. The in-vehicle V2X antenna of claim 11, wherein the in-vehicle V2X antenna further comprises a third ground plate disposed in a direction parallel to the second base edge, and wherein the second base edge is connected to the third ground plate.

13. The vehicle V2X antenna of claim 12, wherein the feed is located in a gap between the first radiator and the second radiator and feeds power from the gap to the first radiator and the second radiator, respectively.

14. A glazing assembly comprising a glazing and the vehicular V2X antenna of any one of claims 1-13.

15. The glass assembly of claim 14, further comprising an enclosure including a bottom wall and an opening opposite the bottom wall, the enclosure being secured to an inner surface of the glass piece with the opening oriented toward the glass piece, the bottom wall being parallel to the inner surface, the V2X antenna being housed within the enclosure.

16. A vehicle comprising the glass assembly of claim 14 or 15.