WO2022262860A1

WO2022262860A1 - Vehicle-mounted v2x antenna, glass assembly, and vehicle

Info

Publication number: WO2022262860A1
Application number: PCT/CN2022/099540
Authority: WO
Inventors: 董梦银; 班涛; 林勇
Original assignee: 福耀玻璃工业集团股份有限公司
Priority date: 2021-06-17
Filing date: 2022-06-17
Publication date: 2022-12-22
Also published as: CN113506978B; CN113506978A

Abstract

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

Description

A vehicle-mounted V2X antenna, glass assembly and vehicle

This application claims the priority of the Chinese patent application with the application number 202110670690.1 and the application title "A Vehicle-mounted V2X Antenna, Glass Component, and Vehicle" submitted to the China Patent Office on June 17, 2021, the entire contents of which are incorporated herein by reference. In this application.

technical field

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

Background technique

Vehicle-to-everything (V2X, Vehicle-to-Everything) establishes a new direction for the development of automotive technology by integrating GPS navigation technology, vehicle-to-vehicle communication technology, wireless communication and remote sensing technology, and realizes the integration of manual driving and automatic driving. Compatible, showing outstanding advantages in improving traffic efficiency, improving driving safety, reducing accident rates, energy saving and emission reduction. The vehicle-mounted V2X antenna in the prior art is generally installed in the external shark fin of the vehicle, and the external shark fin will affect the appearance design of the car body, increase the design difficulty and increase the wind resistance of the car, but the V2X antenna is built in the car body, It will affect the communication performance of the V2X antenna.

Contents of the invention

The present invention provides a vehicle-mounted V2X antenna and a vehicle, so as to solve the technical problems of limited placement of the V2X antenna, complex installation process, and poor communication performance in existing vehicles.

In order to solve the above problems, the present application provides a vehicle-mounted V2X antenna installed inside the vehicle glass, the vehicle-mounted V2X antenna includes: a first radiator, a second radiator, a dielectric board and a feed source. The first radiator and the second radiator are fixed on the dielectric plate, the first radiator and the second radiator are arranged in parallel, or the first radiator and the second radiator The body is connected at an angle. The feed source is connected to 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 one embodiment, the dielectric plate includes a first dielectric plate and a second dielectric plate, the first dielectric plate is arranged along a first direction, the first dielectric plate includes a first surface and The second surface opposite to the surface, the second dielectric plate is vertically connected to the second surface of the first dielectric plate, the first radiator is arranged on the first surface, and the second radiator is arranged on the second surface of the first dielectric plate 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 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 in an "S" shape, the connecting arm is located in the ring of the annular arm, and the connecting arm The opposite ends are respectively connected with the ring arm.

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

In one embodiment, the dielectric plate is arranged along a first direction, the dielectric plate includes a third surface and a fourth surface opposite to the third surface, and the first radiator is arranged on the third surface. surface, the second radiator is disposed on the fourth surface, and the first radiator is parallel to the second radiator.

In one embodiment, the first radiator includes a first body, a first radiation arm, and a second radiation arm, the first radiation arm and the second radiation arm are parallel, and the first body is connected to the The first radiation arm and the second radiation arm. The second radiating body includes a second body, a third radiating arm and a fourth radiating arm, the third radiating arm is parallel to the fourth radiating arm, and the second body connects the third radiating arm and the fourth radiating arm. Describe the fourth radiating arm. The projections of the third radiating arm and the fourth radiating arm along the second direction on the plane where the first radiating body is located are interlaced with the first radiating arm and the second radiating arm, and the first radiating arm The two directions are perpendicular to the first direction.

In one embodiment, the first radiator is in the shape of a "Z", and the shape of the second radiator is the same as the mirror image of the "N".

In one embodiment, the feed source is a coaxial feeder, the coaxial feeder includes a coaxial outer core and a coaxial inner core, the coaxial inner core is electrically connected to the first body, the coaxial The outer core is electrically connected to the second body, so that the 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 plate is arranged along the second direction, the dielectric plate includes a side surface, and the first radiator and the second radiator are arranged at intervals on the side surface.

In one embodiment, the first radiator includes a first top edge, a first side edge, a first bottom edge, and a second side edge connected end-to-end in sequence; the second radiator includes a first edge connected end-to-end in sequence. Second top side, third side side, second bottom side and fourth side side. There is a gap between the first radiator and the second radiator, the first bottom and the second top are located on opposite sides of the gap, and the first radiator and the The second radiator is symmetrical to the gap axis.

In one implementation manner, the vehicle-mounted V2X antenna further includes a third ground plane, the third ground plane is arranged along a direction parallel to the second bottom side, and the second bottom side is connected to the third ground plane. Ground plane electrical connection.

In one embodiment, the vehicle-mounted V2X antenna further includes a feed structure, and the feed source is arranged in the gap between the first radiator and the second radiator, and feeds from the gap to the The first radiator and the second radiator are fed.

The present invention also provides a glass assembly, including a glass piece and the above-mentioned vehicle-mounted V2X antenna.

In one embodiment, the glass assembly further includes a packaging box, the packaging box includes a bottom wall and an opening opposite to the bottom wall, and the packaging box is fixed on the glass part with the opening facing the direction The inner surface of the glass part, the bottom wall is parallel to the inner surface, and the V2X antenna is accommodated in the packaging box.

The present invention also provides a vehicle, including the above-mentioned glass assembly.

In summary, the vehicle-mounted V2X antenna provided by the present invention has a simple structure and is easy to install, and can be installed on the inner surface of the vehicle sunroof glass, and the vehicle-mounted V2X antenna has stable horizontal omnidirectional performance and can realize stable V2X communication performance.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic structural diagram of a glass assembly including a vehicle-mounted V2X antenna provided by an embodiment of the present invention;

Fig. 2 is a partial enlarged view of the vehicle-mounted V2X antenna in Fig. 1;

FIG. 3 is a return loss S11 diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 1;

FIG. 4 is a horizontal gain diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 1;

FIG. 5 is an in-band gain diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 1, wherein the abscissa is frequency, and the ordinate is linear average gain;

6 is a schematic structural diagram of a glass assembly including a vehicle-mounted V2X antenna provided by a second embodiment of the present invention;

Fig. 7 is a partial enlarged view of the vehicle-mounted V2X antenna in Fig. 6;

Fig. 8 is a partial enlarged view of the vehicle-mounted V2X antenna in Fig. 6;

Fig. 9 is a partially enlarged view of another viewing angle of the vehicle-mounted V2X antenna in Fig. 6;

FIG. 10 is a return loss S11 diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 6;

FIG. 11 is a horizontal gain diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 6;

Fig. 12 is an in-band gain diagram of the glass assembly including the vehicle-mounted V2X antenna in Fig. 6, wherein the abscissa is frequency, and the ordinate is linear average gain;

Fig. 13 is a schematic structural diagram of a glass assembly including a vehicle-mounted V2X antenna provided by a third embodiment of the present invention;

Fig. 14 is a partially enlarged view of the vehicle-mounted V2X antenna in Fig. 13;

15 is a return loss S11 diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 13;

FIG. 16 is a horizontal gain diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 13;

FIG. 17 is an in-band gain diagram of the glass assembly including the vehicle-mounted V2X antenna in FIG. 13 , where the abscissa is the frequency, and the ordinate is the linear average gain.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The invention provides a vehicle including a glass assembly. The glass assembly is installed on the top of the vehicle to realize the Vehicle-to-Everything (V2X, Vehicle-to-Everything) function of the vehicle.

Please refer to FIG. 1 , the present invention also provides a glass assembly 500 which is applied to the vehicle. The glass assembly 500 includes a glass piece 200 and a vehicle-mounted V2X antenna 100 . In this embodiment, the glass piece 200 is the sunroof glass of the vehicle, and in other embodiments, the glass piece 200 may also be the windshield glass of the vehicle or other glass.

Specifically, the glass piece 200 includes a front glass 201 , an intermediate layer 202 and a rear glass 203 . The intermediate layer 202 is sandwiched between the front glass 201 and the rear glass 203 . In this embodiment, the intermediate layer 202 is an encapsulation film made of polyvinyl butyral (PVB). Using PVB as the intermediate layer 202 can effectively improve the strength and toughness of the glass piece 200 , and can also improve the anti-collision ability and safety performance of the glass piece 200 . The glass piece 200 also includes an inner surface 204 and an outer surface 205 opposite to the inner surface 204, the outer surface 205 is the surface of the front glass 201 facing away from the intermediate layer 202, and the inner surface 204 is The back glass 203 faces away from the surface of the intermediate layer 202 . When the glass assembly 500 is installed on the roof of the vehicle, the outer surface 205 faces the outside of the vehicle, and the inner surface 204 faces the inside of the vehicle.

In one embodiment, the glass assembly 500 further includes a packaging box 300 . The packaging box 300 is made of non-metal such as plastic. The packaging box 300 includes 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 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 packaging box 300 can be fixed on the black edge area of the glass part 200, and the fixing method can be screwed, welded or bonded, as long as the package and fixed in the glass part 200 can be fixed. The surface 204 is sufficient. In this embodiment, the packaging box 300 protects the vehicle-mounted V2X antenna 100 without affecting the communication performance of the vehicle-mounted V2X antenna 100 .

For ease of description, in this application, 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.

Please refer to FIG. 1, the vehicle-mounted V2X antenna 100 includes a first radiator 10, a second radiator 20, a dielectric plate 30 and a feed source, and the first radiator 10 and the second radiator 20 are fixed on the On the dielectric board 30 , 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 also be connected at an angle. The feed source 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 implementation manners, the feed source may also be connected to the first radiator, or connected to the first radiator and the second radiator at the same time.

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

Please continue to refer to FIG. 1 , in one embodiment, the dielectric board 30 includes a first dielectric board 31 and a second dielectric board 32 , and the first dielectric board 31 is arranged along the first direction X. The first dielectric plate 31 includes a first surface 311 and a second surface 312, the first dielectric plate 31 is provided with a first through hole (not shown in the figure), and the first through hole runs through the first surface 311 and the second surface 312. The second dielectric board 32 is vertically connected to the second surface 312 of the first dielectric board 31 . The first radiator 10 is arranged on the first surface 311 of the first dielectric board 31, the second radiator 20 is arranged on the surface of the second dielectric board 32, and the first radiator 10 and The second radiator 20 is vertically connected. In other embodiments, the first radiator and the second radiator may also 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 horizontal omnidirectional performance, and the first radiator 10 participates in radiation while interacting with the second Capacitance and inductance are formed between the radiators 20, so as to realize impedance adjustment. The vehicle-mounted V2X antenna 100 may be applicable to a scenario where there is no sheet metal or other antennas extending along the second direction Y around the vehicle-mounted V2X antenna 100 . The “surroundings of the vehicle-mounted V2X antenna” mentioned here refers to a wavelength range centered on the vehicle-mounted V2X antenna 100 . At the same time, by arranging the second radiator 20 vertically at one end of the first radiator 10 to form a top antenna, the effective height of the vehicle-mounted V2X antenna 100 is increased, which is conducive to reducing the size of the vehicle-mounted V2X antenna 100. size of.

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, or it can be a solid sheet. Please refer to FIG. 1 and FIG. 2 , in this embodiment, the first radiator 10 is a circular sheet with a hollow structure A. As shown in FIG. 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"-shaped, and the "S"-shaped connecting arm 12 is located on the annular arm 11 In the middle of the ring, and the opposite ends of the connecting arm 12 are respectively connected to the ring arm 11. The second radiator 20 is a deformed whip antenna structure. The second radiator 20 includes a body and a connection section, the body is in the shape of a rectangular sheet, the connection section is in the shape of a strip, and is 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 plate 32 , and the connection section passes through the first through hole from the second surface 312 to connect with the first radiator 10 The center of the arm 12 is connected.

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

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

Please refer to FIG. 3 , in this embodiment, the working frequency band of the vehicle-mounted V2X antenna 100 is 5.5 GHz-6.53 GHz, which can satisfy the frequency band 5.9 GHz-5.925 GHz for the V2X antenna to realize communication.

Please refer to FIG. 4 , the minimum gain of the vehicle-mounted V2X antenna 100 in the planes of 80°, 90°, and 96° is 0.36dB, and the maximum gain is 4.58dB. The vehicle-mounted V2X antenna 100 has good omnidirectional performance in the horizontal plane.

Please refer to FIG. 5 , the linear average gain of the horizontal plane of the vehicle-mounted V2X antenna 100 in the 5.9GHz-5.925GHz frequency band increases as the frequency increases. Wherein, 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 2.54dB. That is to say, the linear average gain of the horizontal plane of the vehicle-mounted V2X antenna 100 in the 5.9GHz-5.925GHz frequency band is 2.51dB-2.54dB. The in-band gain flatness is ≤1dB, which meets the V2X index, and the vehicle-mounted V2X antenna 100 can realize V2X communication.

Please refer to FIG. 6 , in another embodiment of the present application, the first radiator 10 and the second radiator 20 are both sheets. 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 horizontal omnidirectional performance, and the vehicle-mounted V2X antenna 100 is a planar antenna, which can be applied to the A scene where sheet metal parts or other antennas extending along the second direction Y are arranged around the vehicle-mounted V2X antenna 100 . The “surroundings of the vehicle-mounted V2X antenna 100 ” mentioned here refers to a wavelength range centered on the vehicle-mounted V2X antenna 100 . By setting the vehicle-mounted V2X antenna 100 as a planar antenna, it can effectively reduce the impact of the sheet metal parts around the vehicle-mounted V2X antenna 100 or the V2X antenna along the second direction Y on the vehicle-mounted V2X antenna 100. To achieve good out-of-roundness index.

Specifically, please refer to FIGS. 7-9 , the first radiator 10 is in the shape of a "Z". The first radiator 10 includes a first body 13 , a first radiation arm 14 and a second radiation 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 arranged in parallel, and the first free end 142 is arranged opposite to the second connecting end 151, and the second free end 152 is connected to the first connecting end 151. Ends 141 are oppositely disposed. 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 radiation arm 24 and a fourth radiation arm 25, the third radiation arm 24 includes a third connection end 241 and a third free end 242, the fourth radiation The arm 25 includes a fourth connection end 251 and a fourth free end 252 . The third radiating arm 24 and the fourth radiating arm 25 are arranged in parallel, and the third free end 242 is arranged opposite to the fourth connecting end 251, and the fourth free end 252 is connected to the third connecting end 251. Ends 241 are oppositely disposed. 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 . An insulating hole 233 is defined in the center of the second body 23 .

Please refer to FIGS. 6-9 together. The dielectric plate 30 is provided with a second through hole (not shown), and the second through hole penetrates 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 insulating hole 233 is aligned with the second through hole. The projection of the second body 23 along the second direction Y on the plane where the first radiator 10 is located coincides with the first body 13 . The projection of the third radiating arm 24 and the fourth radiating arm 25 along the second direction Y on the plane where the first radiating body 10 is located is similar to that of the first radiating arm 14 and the second radiating arm 14 . The arms 15 are arranged in a staggered manner. In this embodiment, the projection of the third radiating arm 24 and the fourth radiating arm 25 along the second direction Y on the plane where the first radiating body 10 is located is the same as that of the first radiating arm 14 and the fourth radiating arm 25. The second radiation arm 15 forms four sides of a rectangle. In other embodiments, the projection of the third radiating arm and the fourth radiating arm along the second direction on the plane where the first radiating body is located is the same as that of the first radiating arm and the second radiating arm. The radiating arms can also form four sides of other centrosymmetric polygons with even-numbered sides, such as hexagons, octagons, and the like. In this embodiment, the feed source is a coaxial feeder 50 , and the coaxial feeder 50 includes a coaxial outer core 52 and a coaxial inner core 51 . An insulating layer 53 is provided between the coaxial inner core 51 and the coaxial outer core 52 to insulate the coaxial outer core 52 from the coaxial inner core 51 . The material of the insulating layer 53 is not specifically limited here, as long as it can insulate the coaxial outer core 52 and the coaxial inner core 51 . The coaxial inner core 51 is connected to the center of the first radiator 10 through the insulating hole 233 of the second radiator 20 and the second through hole of the dielectric plate 30, and the coaxial inner core 51 is insulated from the second radiator 20 . The coaxial outer core 52 is sleeved on the outer peripheral side of the coaxial inner core 51 , and the coaxial outer core 52 is electrically connected to 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 from the center of the first body 13 to the first end 131 and the second end 132. transmission. On the first radiating arm 14, the current flows from the first connecting end 141 to the first free end 142; on the second radiating arm 15, the current flows from the second connecting end 151 to the The second free end 152 . On the second radiator 20 and the coaxial outer core 52, the current flows from the third radiating arm 24 and the fourth radiating arm 25 to the second main body 23, and then flows from the second main body 23 to the The coaxial outer core 52 . Specifically, on the third radiating arm 24, the current flows from the third free end 242 to the third connection end 241; on the fourth radiating arm 25, the current flows from the fourth free end 252 On the second main body 23, the current flows from the third end 231 and the fourth end 232 to the middle of the second main 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, forming a current loop, which is equivalent to a magnetic couple Pole, so as to achieve horizontal omnidirectionality.

Further, in this embodiment, the first radiator 10 is fixed on the inner surface 204 of the glass part 200 , so as to realize the fixing of the vehicle-mounted V2X antenna 100 . The fixing method may be bonding, welding and the like.

Please refer to FIG. 10 , in this embodiment, the working frequency band of the vehicle-mounted V2X antenna 100 is 5.87 GHz-6.08 GHz, which can satisfy the frequency band 5.9 GHz-5.925 GHz for the V2X antenna to realize communication.

Please refer to FIG. 11 , the minimum gain of the vehicle-mounted V2X antenna 100 in the 80°, 90°, and 96° planes is -1.65dB, and the maximum gain is 1.6dB. The vehicle-mounted V2X antenna 100 has good omnidirectional performance in the horizontal plane. .

Please refer to FIG. 12 , the linear average gain of the horizontal plane of the vehicle-mounted V2X antenna 100 in the 5.9GHz-5.925GHz frequency band increases as the frequency increases. Wherein, when the frequency is 5.9GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is -0.33dB, and when the frequency is 5.925GHz, the linear average gain of the vehicle-mounted V2X antenna 100 is 0.33dB. That is to say, the linear average gain of the horizontal plane of the vehicle-mounted V2X antenna 100 in the 5.9GHz-5.925GHz frequency band is -0.33dB-0.33dB. The in-band gain flatness is ≤1dB, which meets the V2X index, and the vehicle-mounted V2X antenna 100 can realize V2X communication.

Please refer to FIG. 13 , in an embodiment of the present application, the first radiator 10 and the second radiator 20 are solid sheet structures. The dielectric plate 30 includes a first side 35 and a second side 36 , and the first radiator 10 and the second radiator 20 are arranged at intervals on the first side 35 . In this embodiment, the dielectric plate is arranged along the second direction Y, the first side 35 and the second side 36 are parallel to the second direction Y, and the first radiator 10 and the second The two radiators 20 are disposed on the first side 35 at intervals along the second direction Y. In other embodiments, the first radiator 10 and the second radiator 20 may also be arranged on the second side 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 horizontal omnidirectional performance. The vehicle-mounted V2X antenna 100 may be applicable to a scenario where there is no sheet metal or other antennas extending along the second direction Y around the vehicle-mounted V2X antenna 100 . The “surroundings of the vehicle-mounted V2X antenna 100 ” mentioned here refers to a wavelength range centered on the vehicle-mounted V2X antenna 100 .

Specifically, please refer to FIG. 13 and FIG. 14 together, the first radiator 10 includes a first top edge 16 , a first bottom edge 17 , a first side edge 18 and a second side edge 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 end to form the periphery of the first radiator 10 . Both the first top edge 16 and the first bottom edge 17 are straight lines, and the first top edge 16 is parallel to the first bottom edge 17 . Both the first side 18 and the second side 19 are arc-shaped, and the arc-shaped first side 18 and the second side 19 connect with the first bottom 17 The curvature gradually increases from one end to the end connected to 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 end to form the periphery of the second radiator 20 . Both the second top edge 26 and the second bottom edge 27 are straight lines, and the second top edge 26 is parallel to the second bottom edge 27 . Both the third side 28 and the fourth side 29 are arc-shaped, and the arc-shaped third side 28 and the fourth side 29 connect with the second top 26 The curvature gradually increases from one end to the end connected to 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 Radiators are quadrangular.

The first radiator 10 and the second radiator 20 are arranged on the first side 35 at intervals along the second direction Y, and there is a gap between the first radiator 10 and the second radiator 20 In the gap B, the first radiator 10 and the second radiator 20 are axially symmetrical to 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. The "hyperbola" mentioned here means that the overall profile is similar to the hyperbolic structure, and the two curves can 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 there is a gap between the first side 18 and the third side 28 Clearance B. The second side 19 and the fourth side 29 form another branch of the hyperbolic structure, and there is a gap B between the second side 19 and the fourth side 29 . In this embodiment, the vehicle-mounted V2X antenna 100 is a deformation of a dipole antenna. By setting the side profiles of the first radiator 10 and the second radiator 20 into a hyperbolic structure, the Working bandwidth of the vehicle-mounted V2X antenna 100 .

In other implementation manners, the first radiator 10 and the second radiator 20 may also have other shapes, as long as they can mainly realize V2X communication.

In one embodiment, the vehicle-mounted V2X antenna 100 further includes a third ground plate 41, the third ground plate 41 is arranged along a direction parallel to the second bottom edge 27, and the second bottom edge 27 is electrically connected to the third ground plate 41 . In this embodiment, by connecting the second bottom edge 27 of the second radiator 20 to the third ground plate 41, according to the mirror image principle, the size of the vehicle-mounted V2X antenna 100 in the second direction Y can be effectively reduced, The miniaturization of the vehicle-mounted V2X antenna 100 is realized.

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

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

Please refer to FIG. 15 , the working frequency band of the vehicle-mounted V2X antenna 100 is 5.39 GHz-6.65 GHz, which can satisfy the frequency band 5.9 GHz-5.925 GHz for the V2X antenna to realize communication.

Please refer to FIG. 16 , the minimum gain of the vehicle-mounted V2X antenna 100 in the 80°, 90°, and 96° planes is -0.9dB, and the maximum gain is 7.8dB. The vehicle-mounted V2X antenna 100 has good omnidirectional performance in the horizontal plane. .

Please refer to FIG. 17 , the linear average gain of the horizontal plane of the vehicle-mounted V2X antenna 100 in the 5.9GHz-5.925GHz frequency band increases as the frequency increases. Wherein, 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 3.11dB. That is to say, the linear average gain of the horizontal plane of the vehicle-mounted V2X antenna 100 in the 5.9GHz-5.925GHz frequency band is 3.10dB-3.11dB. The in-band gain flatness is less than or equal to 1dB, which meets the index of the V2X antenna, 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 can also be a monopole antenna, or a deformed structure of a monopole antenna, or a deformed structure of a dipole antenna . As long as the vehicle-mounted V2X antenna 100 can satisfy V2X communication.

The embodiments of the present invention have been described in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention; at the same time, for Those skilled in the art will have changes in the specific implementation and scope of application according to the idea of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

A vehicle-mounted V2X antenna installed on the inner side of the vehicle glass, characterized in that it includes: a first radiator, a second radiator, a dielectric plate and a feed source, the first radiator and the second radiator are fixed on the On the dielectric board, the first radiator and the second radiator are arranged in parallel, or the first radiator and the second radiator are connected at an angle, and the feed source and the first radiator body 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 according to claim 1, wherein the dielectric board includes a first dielectric board and a second dielectric board, the first dielectric board is arranged along a first direction, and the first dielectric board includes a second dielectric board. a surface and a second surface opposite to the first surface, the second dielectric plate is vertically connected to the second surface of the first dielectric plate, the first radiator is arranged on the first surface, and the The second radiator is disposed on the surface of the second dielectric plate, and the second radiator is connected to the first radiator.
The vehicle-mounted V2X antenna according to claim 2, wherein the first radiator is a sheet with a hollow structure in the middle.
The vehicle-mounted V2X antenna according to claim 3, wherein the first radiator includes an annular arm and a connecting arm, the connecting arm is in an "S" shape, and the connecting arm is located on the ring of the annular arm and the opposite ends of the connecting arm are respectively connected to the ring arm.
The vehicle-mounted V2X antenna according to claim 4, characterized in that, the vehicle-mounted V2X antenna further comprises a first grounding plate, and the first grounding plate is arranged on the side of the second dielectric plate opposite to the second radiator. On the surface, the feed source is connected between the first ground plate and the second radiator.
The vehicle-mounted V2X antenna according to claim 1, wherein the dielectric plate is arranged along a first direction, the dielectric plate includes a third surface and a fourth surface opposite to the third surface, the first The radiator is arranged on the third surface, the second radiator is arranged on the fourth surface, and the first radiator and the second radiator are parallel.
The vehicle-mounted V2X antenna according to claim 6, wherein the first radiator includes a first body, a first radiation arm, and a second radiation arm, and the first radiation arm and the second radiation arm are parallel to each other. , the first body connects the first radiating arm and the second radiating arm; the second radiating body includes a second body, a third radiating arm, and a fourth radiating arm, and the third radiating arm and the The fourth radiation arm is parallel, the second body connects the third radiation arm and the fourth radiation arm; the third radiation arm and the fourth radiation arm are in the first radiation along the second direction The projection on the plane where the body is located is arranged alternately with the first radiation arm and the second radiation arm, and the second direction is perpendicular to the first direction.
The vehicle-mounted V2X antenna according to claim 7, wherein the first radiator is in a "Z" shape, and the shape of the second radiator is the same as the mirror image of the "N" shape.
The vehicle-mounted V2X antenna according to claim 7 or 8, wherein the feed source is a coaxial feeder, the coaxial feeder includes a coaxial outer core and a coaxial inner core, and the coaxial inner core is connected to the coaxial inner core. The first body is electrically connected, and the coaxial outer core is electrically connected to the second body, so that the first radiating arm, the second radiating arm, the third radiating arm and the fourth radiating arm Arm currents are in the same direction.
The vehicle-mounted V2X antenna according to claim 1, wherein the dielectric board includes a side surface, and the first radiator and the second radiator are arranged at intervals on the side surface.
The vehicle-mounted V2X antenna according to claim 10, wherein the first radiator includes a first top edge, a first side edge, a first bottom edge, and a second side edge sequentially connected end to end; The radiator includes a second top side, a third side side, a second bottom side and a fourth side side which are sequentially connected end to end, there is a gap between the first radiator and the second radiator, and the first bottom side The side and the second top side are located on opposite sides of the gap, and the first radiator and the second radiator are symmetrical to the gap axis.
The vehicle-mounted V2X antenna according to claim 11, characterized in that, the vehicle-mounted V2X antenna further includes a third grounding plate, the third grounding plate is arranged along a direction parallel to the second bottom edge, and the first The two bottom edges are connected with the third grounding plate.
The vehicle-mounted V2X antenna according to claim 12, wherein the feed source is arranged in a gap between the first radiator and the second radiator, and feeds from the gap to the first radiator respectively. The radiator and the second radiator are fed.
A glass assembly, characterized by comprising a glass piece and the vehicle-mounted V2X antenna according to any one of claims 1-13.
The glass assembly according to claim 14, wherein the glass assembly further comprises a packaging box, the packaging box includes a bottom wall and an opening opposite to the bottom wall, and the packaging box has the opening facing the The direction of the glass part is fixed on the inner surface of the glass part, the bottom wall is parallel to the inner surface, and the V2X antenna is accommodated in the packaging box.
A vehicle, characterized by comprising the glass assembly according to claim 14 or 15.