V2X antenna and the V2X communication system incorporating it

Abstract

A V2X antenna, including: a Z-directional radiator (120); an XY-directional emitter (130) configured to extend from a central position of the Z-directional emitter in a Z-direction, and an induction coupler (140) which is formed between the Z-directional emitter (120) and the XY-directional emitter (130) and is configured to apply an induced current with a predetermined level to the Z-directional emitter (120) and the XY-directional emitter (130), wherein the induction coupler (140) is formed in a cross shape, starting at a center of the XY-directional emitter (130), wherein the V2X antenna further comprises a substrate unit (110) formed along an edge of the Z-directional radiator (120) such that the Z-directional radiator (120) is formed within the substrate unit (110), and wherein the V2X antenna further comprises a power feeder (150) formed within the substrate unit (110), wherein an upper part of the power feeder (150) is configured to contact a lower part of the Z-directional radiator, and wherein the radiation directivity patterns and / or radiation directivity intensities of the Z-directional emitter (120) and / or the XY-directional emitter (130) are varied by means of biased directions of the position of the current feeder (150).

Description

CROSS-REFERENCE TO RELATED REGISTRATION

[0001] This application claims the benefits of Korean patent application No. 10-2015-0147132, filed on October 22, 2015. AREA

[0002] The present invention relates to a V2X antenna and a V2X communication system comprising the same. BACKGROUND

[0003] The statements in this section merely provide background information relating to the present disclosure and do not necessarily represent the state of the art.

[0004] A V2X communication system within a communication system that supports vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication, and is used to indicate dangerous situations that arise ahead in road situations on which vehicles are driving, such as highway situations or normal road situations, via communication between vehicles, or to spread dangerous situations to behind vehicles via communication between vehicles or a mobile communication base station, in order to avoid accidents.

[0005] Furthermore, the V2X communication system can contribute to traffic accident prevention, such as detecting dangerous objects in front, traffic control, non-stop crossing of an emergency vehicle, an intersection, accident prevention in a blind spot zone at an intersection and pre-detection of the approach of two-wheeled vehicles, according to application services.

[0006] Here, a patch antenna, which performs directional radiation in the direction of the Earth's surface (X and Y directions), can be used to implement V2X communication systems between vehicles, and a monopole antenna, which performs non-directional radiation in all directions (Z direction), can be used to implement V2X communication systems between vehicles and a base station.

[0007] If a non-directional antenna is used, radiation is emitted in all directions, and thus the gain in a specific direction is low; and if a directional antenna is used, the beamwidth is narrow, and thus the communication shadow region is wide.

[0008] US 2009 / 0140927A1 relates to a microstrip antenna that can be linearly, co-circularly, or dual-circularly polarized, has co-planar radiators, and operates in two frequency bands. An inner radiator is surrounded by and spaced apart from an outer radiator. Each radiator oscillates at a different frequency. In one embodiment, a network has a single, cross-shaped feed line that is positioned between the inner and outer radiators and capacitively coupled to them.

[0009] JP 2005 / 167911A concerns the provision of a combined antenna that is easy to design and manufacture, while ensuring earthquake safety and reducing costs. The combined antenna comprises two antennas, each corresponding to differently polarized waves. SUMMARY

[0010] The invention is defined by the attached claims.

[0011] The present disclosure provides a V2X antenna that exhibits both directionality and non-directionality, generating strong directionality in a direction where a counterpart vehicle is located and in a direction where a communication target is located, and a V2X communication system that exhibits the same.

[0012] Additional advantages, functions, and features of the present disclosure are partly described below and partly become apparent to those skilled in the art upon examination of the following or can be learned from the application of the present disclosure. The functions and other advantages of the present disclosure can be realized and achieved through the structure that is presented in particular in the written description and the claims herein, as well as in the accompanying drawings.

[0013] A V2X antenna contains a Z-directional radiator, an XY-directional radiator extending in the Z direction from the central position of the Z-directional radiator, and an induction coupler formed between the Z-directional radiator and the XY-directional radiator, which applies an induced current of a designated level to the Z-directional radiator and the XY-directional radiator.

[0014] The V2X antenna can further include a substrate unit formed along the edge of the Z-directional radiator, so that the Z-directional radiator is formed within the substrate unit.

[0015] The V2X antenna further includes a power supply formed within the substrate unit, with the upper part of the power supply contacting the lower part of the Z-directional radiator.

[0016] The V2X antenna may also include a grounding component formed on the lower part of the substrate unit and contacting the lower part of the power supply.

[0017] The grounding part can be made of a conductive material.

[0018] The induction coupler is formed in a cross shape, starting in the center of the XY-directional emitter.

[0019] If the induction coupler includes a first induction coupler part formed in the X direction and a second induction coupler part formed in the Y direction and crossing the first induction coupler part, the length of one side of the first induction coupler part and the length of one side of the second induction coupler part can be the same, except with respect to the crossing region between them.

[0020] The lengths can be within the range of 1.4 ∼ 1.8 mm.

[0021] The width of the end of the first induction coupler part or the second induction coupler part can be within the range of 0.02 ∼ 2 mm.

[0022] The length of one side of the first induction coupler part and the length of one side of the second induction coupler part, except with respect to the crossing section between them, may have different values ​​within the range of 1.4 ∼ 1.8 mm.

[0023] The XY-directional emitter can contain a first XY-directional emitter part, which has a rod shape and is formed at the central position of the Z-directional emitter, and a second XY-directional emitter part with a column shape, formed at the upper end of the first XY-directional emitter part.

[0024] The column-shaped second XY-directional radiator part can serve as a load.

[0025] The Z-directional emitter, the XY-directional emitter and the induction coupler can be made of a conductive material.

[0026] The XY-directional emitter can be operated in a monopole mode and the Z-directional emitter can be operated in a patch mode.

[0027] The current feeder can be biased in the X direction within the substrate unit, so that the Z-directional emitter or the XY-directional emitter has radiation directivity in the ZX direction, or biased in the Y direction within the substrate unit, so that the Z-directional emitter and the XY-directional emitter have radiation directivity in the ZY direction.

[0028] In another aspect of the present disclosure, a V2X communication system includes a first V2X antenna inside a counterpart vehicle, a second V2X antenna of a communication target, and a V2X antenna inside a vehicle which is connected to the first V2X antenna by first WAVE communication and is connected to the V2X antenna by second WAVE communication.

[0029] The V2X antenna can include a Z-directional radiator configured to perform the second WAVE communication, an XY-directional radiator extending in the Z direction from the central position of the Z-directional radiator to perform the first WAVE communication, an induction coupler formed between the Z-directional radiator and the XY-directional radiator that applies induced current of a predetermined level to the Z-directional radiator and the XY-directional radiator, a substrate unit formed along the edge of the Z-directional radiator such that the Z-directional radiator is formed within the substrate unit, a power feeder formed within the substrate unit with the upper part of the power feeder contacting the lower part of the Z-directional radiator, and a grounding part formed on the lower part of the substrate unit that contacts the lower part of the power feeder.

[0030] The induction coupler is formed in a cross shape, starting in the center of the XY-directional emitter.

[0031] If the induction coupler includes a first induction coupler part formed in the X direction and a second induction coupler part formed in the Y direction and crossing the first induction coupler part, the length of one side of the first induction coupler part and the length of one side of the second induction coupler part, except for the crossing region between them, can be equal within the range of 1.4 ∼ 1.8 mm.

[0032] The XY-directional emitter can include a first XY-directional emitter part, which has a rod shape and is formed at the central position of the Z-directional emitter, and a second XY-directional emitter part, which has a column shape and is formed at the top of the first XY-directional emitter part, and the column-shaped second XY-directional emitter part can serve as a load.

[0033] The current feeder can be biased in the X direction within the substrate unit, so that the Z-directional emitter or the XY-directional emitter has a radiation directionality in the ZX direction, or it can be biased in the Y direction within the substrate unit, so that the Z-directional emitter or the XY-directional emitter has a radiation directionality in the ZY direction.

[0034] Further areas of applicability will become apparent from the description provided here. It is understood that the description and specific examples serve only illustrative purposes and are not intended to limit the scope of protection afforded by this disclosure. DRAWINGS

[0035] To make the revelation easily understandable, various forms of it, given by example, will now be described, with reference to the accompanying drawings, in which: Fig. 1 is a view that schematically illustrates an example of a V2X communication system; Fig. 2 is a perspective view illustrating an example of a V2X antenna structure; Fig. 3 is an enlarged view showing the structure of an induction coupler of Fig. 2 shows; Fig. Figure 4 is an enlarged view illustrating the structure of a different type of induction coupler, which differs from Fig. 3 distinguishes; Fig. Figure 5 is a graph illustrating the directivity characteristics of a second XY-directional emitter part, which is considered a load of Fig. 2 serves; and Fig. 6 is a view which graphically shows an example of one from the V2X antenna of Fig. 2 generated radiation patterns illustrated.

[0036] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure in any way. DETAILED DESCRIPTION

[0037] The following description is merely exemplary and is not intended to limit the present disclosure, application, or uses. It is understood that in the drawings, corresponding reference numerals denote identical or corresponding parts and features.

[0038] The suffixes “module” and “unit” used in the description below are given together or used only for the sake of simplicity in creating the specification and have no distinctive meanings or functions.

[0039] Furthermore, it is understood that the expression "and / or" used in the following description includes any and all possible combinations of one or more relevant objects listed.

[0040] In the following description of the forms, it is understood that the terms “containing”, “comprising”, “consisting of” and “exhibiting” mean the presence of corresponding elements unless otherwise stated, and do not exclude the presence of any other elements.

[0041] A V2X antenna and a V2X communication system, disclosed in the following description, exhibit both directivity and non-directivity to smoothly transmit and receive data between vehicles and between a vehicle and a communication target connected via WAVE communication standardized by IEEE, and concentrates the radiation directionality generated thereby in the Earth surface direction (X and Y directions) and all directions (Y direction) in which the counterpart vehicle and the communication target are located, thereby improving the communication sensitivity to the counterpart vehicle and the communication target.

[0042] Furthermore, the V2X antenna and the V2X communication system concentrate radiation directivity that was in unnecessary directions in the XZ or YZ direction, in which most counterpart vehicles and communication targets are located, as well as in the Earth's surface direction (X and Y directions) and the upward direction (Z direction), thereby realizing a mechanism to further improve communication sensitivity with the counterpart vehicle and the communication target.

[0043] Here, communication targets refer to platforms (e.g., terminal devices, communication modules, base stations, etc.) that support dedicated short range communication (DSRC) technology provided by an electronic toll collection (ETC) service, cellular communication technology providing a telematics service, broadcast and communication technology providing traffic information over a wide area, etc.

[0044] Furthermore, communication targets can refer to nomadic devices such as mobile phones, notebooks, and portable devices.

[0045] In order to improve communication sensitivity with a counterpart vehicle and a communication target connected via V2X communication, a V2X antenna installed in any vehicle and the V2X communication system using the same will be described in more detail below. An example of the V2X communication system

[0046] Fig. Figure 1 is a view that schematically illustrates an example of a V2X communication system.

[0047] With reference to Fig. 1 includes a V2X communication system 1000, a V2X antenna 100 inside a vehicle 10, a first V2X antenna 200 inside a counterpart vehicle 20 and a second V2X antenna 300 of a communication target 30.

[0048] The V2X antenna 100 in vehicle 10 can be connected to the first V2X antenna 200 inside the counterpart vehicle 20 via V2X communication (first WAVE communication) and to the second V2X antenna 300 of the communication target 30 via V2X communication (second WAVE communication).

[0049] Vehicle 10 and its counterpart vehicle 20 can be moving or stationary. Therefore, the initial WAVE communication between vehicle 10 and its counterpart vehicle 20 can be performed whether they are moving or stationary.

[0050] On the other hand, the communication target 30 can be fixed in a predetermined position or movable.

[0051] For example, if the communication target 30 is a mobile phone, the second WAVE communication can be carried out between the mobile phone 30, which is being held by a human hand, and the vehicle 10. On the other hand, if the communication target 30 is a base station, the second WAVE communication can be carried out between the moving or stationary vehicle 10 and the base station, which is located in a building or at the roadside.

[0052] Here, WAVE communication between the V2X antenna 100 inside the vehicle 10 and the V2X antenna 200 inside the counterpart vehicle 20 can be carried out by non-directivity, for example not only radiation directivity, in which radiation is carried out in the X-direction and the Y-direction, but also radiation directivity, in which radiation is carried out in the XZ-direction and / or the YZ-direction.

[0053] Furthermore, WAVE communication between the V2X antenna 100 inside the vehicle 10 and the second V2X antenna 300 of the communication target 30 can be carried out by directionality, for example not only by radiation directionality, in which radiation is carried out in the Z direction (upwards direction), but also by radiation directionality, in which radiation is carried out in the XZ direction and / or the YZ direction.

[0054] As described above, by designing the V2X antenna 100 inside the vehicle 10 as a communication module that operates as a non-directional antenna and a directional antenna capable of covering not only the Earth surface direction and the upward direction, but also directions in between, radiation directivity in unnecessary directions can be reduced, thereby increasing communication sensitivity and reducing manufacturing costs.

[0055] The structure and characteristics of the V2X antenna 100 within the vehicle 10 are described in more detail below. An example of the V2X antenna

[0056] Fig. Figure 2 is a perspective view showing an example of a V2X antenna structure.

[0057] With reference to Fig. 2 The V2X antenna 100 can contain a substrate unit 110, a Z-directional radiator 120, an XY-directional radiator 130, an induction coupler 140 and a power supply 150.

[0058] First, the substrate unit 110 can be made of a dielectric material and have an approximately rectangular shape. The substrate unit 110 can be formed along the edge of the Z-directional emitter 120, which will be described later, so that the Z-directional emitter is formed within the substrate unit 110.

[0059] The substrate unit 110 can include a grounding element 111 on its lower part. The grounding element 111 can be made of a conductive material for easy grounding.

[0060] According to one aspect of the present disclosure, the Z-directional emitter 120 is mounted inside the substrate unit 110. The upper end of the Z-directional emitter 120, which is mounted inside the substrate unit 100, can be manufactured to have a height that approximately coincides with the height of the upper end of the substrate unit 110 and a rectangular shape that is the same as the shape of the substrate unit 110.

[0061] By means of such a structure to perform WAVE communication with the communication target 30, the Z-directional emitter 120 can essentially exhibit radiation directivity in the Z direction orthogonal to the Earth's surface at 3D spatial coordinates when induced current is introduced.

[0062] In this case, the Z-directional radiator 120 can be operated in a patch mode of a patch antenna with a directional radiation pattern.

[0063] To increase the radiation directivity, the Z-directional emitter 120 can be made of a conductive material, for example, copper. However, the disclosure is not limited to this, and the Z-directional emitter 120 can be made of a combination of two or more conductive materials.

[0064] According to a mold, the XY-directional emitter 130 is manufactured in a mold in which the XY-directional emitter 130 is located at the central position of the Z-directional emitter 120 and extends in the Z direction in 3D space coordinates.

[0065] This means that the XY-directional emitter 130 can extend in the Z direction from the central position of the Z-directional emitter 120.

[0066] The XY-directional emitter 130 can be formed from a conductor, for example copper, and have a first XY-directional emitter part 131 with a rod shape and formed at the central position of the Z-directional emitter 120, and a second XY-directional emitter part 132 with a column shape and formed at the upper end of the first XY-directional emitter 131.

[0067] Through such a structure, in order to smoothly carry out WAVE communication with the counterpart vehicle 20, the XY-directional emitter 130 can exhibit non-directivity, that is, a radiation directivity in the direction of the Earth's surface, for example the X-direction and the Y-direction, in 3D spatial coordinates, when induced current is introduced.

[0068] In this case, the XY-directional radiator 130 can be operated in a monopole mode of a monopole antenna that has a non-directional radiation pattern.

[0069] In particular, the column-shaped second XY-directional emitter part 132 can be manufactured as a top-loaded load of a type that has strong radiation directivity in the X and Y directions in order to implement a smoother V2X communication system with the counterpart vehicle 20.

[0070] In one form, the induction coupler 140 can be formed from a conductor, for example copper, and can be formed (mounted) between the Z-directional emitter 120 and the XY-directional emitter 130.

[0071] To facilitate assembly, the induction coupler 140 can be manufactured to have a slotted structure and its height is approximately equal to the height of the Z-directional emitter 120 and can be inserted between the Z-directional emitter 120 and the XY-directional emitter 130.

[0072] The induction coupler 140 can apply induced current of a predetermined intensity to the Z-directional emitter 120 and the XY-directional emitter 130, thereby allowing the Z-directional emitter 120 and the XY-directional emitter 130 to exhibit the necessary directional and / or non-directional radiation directivities as described above.

[0073] Here, the shape and length of the induction coupler 140 can influence the amount of energy (radiation) emitted from the Z-directional emitter 120 and the XY-directional emitter 130.

[0074] This means that the directional and non-directional radiation directivity patterns and / or radiation directivity intensities emitted from the Z-directional emitter 120 and the XY-directional emitter 130 are determined by the shape and length of the induction coupler 140.

[0075] For example, if the induction coupler 140 is formed in a cross shape starting in the center of the XY-directional emitter 130, the Z-directional emitter 120 and / or the XY-directional emitter 130 can exhibit strong radiation directivity not only in the intrinsic directions described above, but also in the XZ direction and / or the YZ direction.

[0076] For this purpose, the cross-shaped induction coupler 140 can include a first induction coupler part 141 formed in the X direction and a second induction coupler part 142 formed in the Y direction and crossing the first induction coupler part 141.

[0077] Radiation characteristics with respect to the length of the induction coupler 140 will be discussed later with reference to Fig. 2 described.

[0078] Finally, the power supply 150, whose upper part contacts the lower part of the Z-directional emitter 120, and whose majority is located within the substrate unit 110, can be formed.

[0079] Such a current feeder 150 can significantly influence the radiation pattern and / or radiation intensity of the Z-directional radiator 120. For example, the radiation directivity patterns and / or radiation directivity intensities of the Z-directional radiator 120 and / or the XY-directional radiator 130 can be varied by adjusting the biased directions of the current feeder 150's position.

[0080] For example, the current feeder 150, which is biased in the X direction, can be formed within the substrate unit 110, so that the Z-directional emitter 120 and / or the XY-directional emitter 130 exhibit strong radiation directivity in the ZX direction.

[0081] This allows the Z-directional emitter 120 to not only exhibit a radiation pattern in the Z direction, but also strong radiation directivity in the XZ direction, and / or the XY-directional emitter 130 to not only exhibit non-directional radiation directivity in the X and Y directions, but also strong radiation directivity in the XZ direction.

[0082] However, the disclosure is not limited to this and the power supply 150 may be located at other positions in the substrate unit 110.

[0083] For example, although this is not shown in the drawings, the current feeder 150, which is biased in the Y direction, can be configured within the substrate unit 110 such that the Z-directional emitter 120 and / or XY-directional emitter 130 exhibit strong radiation directivity in the ZY direction.

[0084] In this case, the Z-directional emitter 120 can not only exhibit radiation directivity in the Z direction, but also strong radiation directivity in the YZ direction, and / or the XY-directional emitter 130 can not only exhibit non-directional radiation directivity in the X and Y directions, but also strong radiation directivity in the YZ direction.

[0085] If the Z-directional emitter 120 and the XY-directional emitter 130 exhibit radiation directivity in the ZY and YZ directions, the communication sensitivity can be increased to more accurately detect a counterpart vehicle and a communication target located at a designated height above the Earth's surface.

[0086] The grounding part 111 of the substrate unit 110 described above is formed on the lower part of the substrate unit 110 and contacts the lower part of the current supply 150, thus serving as grounding for current (induced current) flowing in the Z-directional emitter 120 and / or the XY-directional emitter 130.

[0087] The influence of the length of the induction coupler 140 on directivity characteristics is described below.

[0088] Fig. Figure 3 is an enlarged view showing the structure of the induction coupler of Fig. 2 illustrated, and Fig. Figure 4 is an enlarged view illustrating the structure of a different type of induction coupler, which differs from... Fig. 3 differs.

[0089] With reference to Fig. 3. The induction coupler 140 can include the first induction coupler part 141, which is formed in the X direction, and the second induction coupler part 142, which is formed in the Y direction and intersects the first induction coupler part 141.

[0090] In this case, the length of one side of the first induction coupler part 141 and the length of one side of the second induction coupler part 142, except for the crossing region of the induction coupler 140 (for example, length X and length Y), can be equal. Here, length X and length Y can be determined within the range of 1.4 to 1.8 mm.

[0091] For example, if the length X of the first induction coupler part 141 and the length Y of the second induction coupler part 142 exceed the length range described above, the magnitude of the electric field induced in the XY-directional radiator 130 increases, and thus the non-directional radiation directivity in the Earth surface direction, i.e., the X and Y directions, is increased. However, the directivity in the Z direction of the Z-directional radiator 120 is decreased proportionally to the increase in the non-directional radiation directivity in the Earth surface direction. Therefore, the length X and length Y of the induction coupler 140 are within the range described above.

[0092] Otherwise, if the length X of the first induction coupler part 141 and the length Y of the second induction coupler part 142 are below the length range described above, the radiation directivity in the Z direction of the Z-directional emitter 120 is increased, but the inductive coupling with the XY-directional emitter 130 is decreased, and thus the non-directional radiation directivity in the X and Y directions is reduced. Therefore, the length X and length Y of the induction coupler 140 are within the range described above.

[0093] However, the length X of the first induction coupler part 141 and the length Y of the second induction coupler part 142 are not limited to the same length and can differ, for example, as shown in Fig. 4 shown.

[0094] This means that, with reference to Fig. 4 the length of one side of a third induction coupler part 143 and length of one side of a fourth induction coupler part 144, except with respect to the crossing region of an induction coupler 140, may differ according to a shape (for example, a length X' and a length Y').

[0095] However, although the length X' of the third induction coupler part 143 and the length Y' of the fourth induction coupler part 144 differ, the lengths X' and Y' can have different values ​​within the range of 1.4 to 1.8 mm. For example, the length X' of the third induction coupler part 143 can be 1.6 mm and the length Y' of the fourth induction coupler part 144 can be 1.4 mm.

[0096] Furthermore, unlike Fig. 4 The induction coupler 140 can be manufactured such that the length X' of one side of the third induction coupler part 143 and the length of the other side of the third induction coupler part 143, which are located on the other side of the crossing region, differ, and the length Y' of one side of the fourth induction coupler part 144 and the length of the other side of the fourth induction coupler part 144, located on the other side of the crossing region, differ.

[0097] As described above, various modifications of the lengths within the range of improving the radiation characteristics can be determined not only in the X, Y and Z directions, but also in the XZ and YZ directions.

[0098] The widths a of the ends of the first induction coupler part 141 and / or the second induction coupler part 142, which are in Fig. Figure 3 shows that the widths “a” of the ends of the first induction coupler part 141 and the second induction coupler part 142 can be the same or different, within the range of 0.02 to 2 mm.

[0099] The reason why the first induction coupler part 141 and the second induction coupler part 142 have the final widths “a” described above is also to increase the strong radiation directivity in the directions of the counterpart vehicle 20 and the communication target 30. However, the disclosure is not limited to this, and the first induction coupler part 141 and the second induction coupler part 142 can be manufactured such that they have final widths which are larger or smaller than the width “a” described above, if it is possible to manufacture these induction coupler parts 141 and 142.

[0100] The reason for this is that the design of the end widths “a” of the first induction coupler part 141 and the second induction coupler part 142 is less sensitive to radiation characteristics compared to the design of the length X of the first induction coupler part 141 and the length Y of the second induction coupler part 142.

[0101] Example of 1 of directive characteristics Fig. Figure 5 is a graph illustrating the directivity characteristics of the second XY-directional radiator part, which is considered a load of Fig. 2 serves.

[0102] With reference to Fig. 5 can be confirmed that when the V2X antenna 100 contains the second XY-directional radiator part 132, which acts as a load, a non-directional radiation pattern 40 in the X-direction and the Y-direction formed thereby has a greater directivity intensity than a conventional radiation pattern 50 (of a monopole antenna without the second XY-directional radiator part 132).

[0103] This means that the conventional radiation pattern 50 in the X-direction and in the Y-direction, which in Fig. Figure 5 shows that the radiation pattern is not very flat and spreads in other directions, for example in the Z direction or downwards along the Earth's surface. However, the radiation pattern 40 is not emitted in the Z direction or downwards along the Earth's surface and is concentrated in the X and Y directions. Example 2 of directiveness characteristics

[0104] Fig. Figure 6 is a view that graphically shows an example of a V2X antenna from Fig. 2 generated radiation patterns illustrated.

[0105] With reference to Fig. 6. It can be confirmed that a radiation pattern generated from the V2X antenna described above, in order to perform smooth WAVE communication with a counterpart vehicle that is stopped or moving on the Earth's surface, or at a specified height above the Earth's surface, and a communication target that is fixed or moving in a higher position than the counterpart vehicle, exhibits a strong radiation directionality pattern and / or radiation directionality intensity not only in the Earth's surface direction, i.e., in the X-direction and the Y-direction, but also in the XZ-direction and / or the YZ-direction, in which most communication targets and counterpart vehicles are located.

[0106] In particular, the reason why the directivity characteristics are increased in the XZ direction is that the current feeder 150 is biased in the X direction within the substrate unit 110. In this case, it can be assumed that... Fig. 6 confirms that the directionality characteristics in the YZ direction as well as directionality characteristics in the XZ direction are improved.

[0107] As can be seen from the above description, a V2X antenna with improved radiation characteristics according to the present disclosure exhibits effects as follows.

[0108] First, unnecessary radiation directivity for the V2X communication system is concentrated in directions in which a communication target and / or a counterpart vehicle is located (for example, X, Y, Z, YZ and XZ directions), thereby improving the communication sensitivity with the counterpart vehicle and / or the communication target.

[0109] Secondly, radiation in unnecessary directions is avoided, thus improving the energy efficiency of a V2X communication system.

[0110] It is apparent to those skilled in the art that various modifications and variations can be made to the present disclosure. Therefore, it is intended that the present disclosure covers modifications and variations of the present disclosure, provided they fall within the scope of the claims and their equivalents.

Claims

[1] A V2X antenna, comprising: a Z-directional radiator (120); an XY-directional emitter (130) configured to extend from a central position of the Z-directional emitter in a Z-direction, and an induction coupler (140) which is formed between the Z-directional emitter (120) and the XY-directional emitter (130) and is configured to apply an induced current with a predetermined level to the Z-directional emitter (120) and the XY-directional emitter (130), wherein the induction coupler (140) is formed in a cross shape, starting at a center of the XY-directional emitter (130), wherein the V2X antenna further comprises a substrate unit (110) formed along an edge of the Z-directional radiator (120) such that the Z-directional radiator (120) is formed within the substrate unit (110), and wherein the V2X antenna further comprises a power feeder (150) formed within the substrate unit (110), wherein an upper part of the power feeder (150) is configured to contact a lower part of the Z-directional radiator, and wherein the radiation directivity patterns and / or radiation directivity intensities of the Z-directional emitter (120) and / or the XY-directional emitter (130) are varied by means of biased directions of the position of the current feeder (150). [2] V2X antenna according to claim 1, further comprising a grounding part (111) formed on a sub-part of the substrate unit (110) and configured to contact a sub-part of the power supply (150). [3] V2X antenna according to claim 2, wherein the grounding part (111) is formed from a conductive material. [4] V2X antenna according to claim 1, wherein, when the induction coupler (140) comprises a first induction coupler part (141) formed in an X direction and a second induction coupler part (142) formed in a Y direction and intersecting the first induction coupler part (141), the length of one side of the first induction coupler part (141) and the length of one side of the second induction coupler part (142) are equal, except with respect to a crossing region between them. [5] V2X antenna according to claim 4, wherein the lengths of the sides of the first and second induction coupler part (141, 142) are within a range of 1.4 ∼ 1.8 mm. [6] V2X antenna according to claim 4, wherein the width of one end of the first induction coupler part (141) or of the second induction coupler part (142) is within a range of 0.02 ∼ 2 mm. [7] V2X antenna according to claim 4, wherein the length of one side of the first induction coupler part (141) and the length of one side of the second induction coupler part (142), except with respect to the crossing region between them, have different lengths within a range of 1.4 ∼ 1.8 mm. [8] V2X antenna according to claim 1, wherein the XY-directional radiator (130) comprises: a first XY-directional emitter part (131) with a rod shape and formed at the central position of the Z-directional emitter (120); and a second XY-directional emitter part (132) with a column shape and formed at an upper end of the first XY-directional emitter part (131). [9] V2X antenna according to claim 8, wherein the column-shaped second XY-directional radiator part (132) serves as a load. [10] V2X antenna according to claim 1, wherein the Z-directional radiator (120), the XY-directional radiator (130) and the induction coupler (140) are formed from a conductive material. [11] V2X antenna according to claim 1, wherein the XY-directional radiator (130) is operated in a monopole mode and the Z-directional radiator (120) is operated in a patch mode. [12] V2X antenna according to claim 1, wherein the current feeder (150) is biased in an X direction within the substrate unit (110) so that the Z-directional radiator (120) or the XY-directional radiator (130) has a radiation directivity in a ZX direction, or is biased in a Y direction within the substrate unit (110) so that the Z-directional radiator (120) or the XY-directional radiator (130) has a radiation directivity in a ZY direction. [13] V2X communication system, including: a first V2X antenna (200) inside a counterpart vehicle (20); a second V2X antenna (300) of a communication target (30); and a V2X antenna (100) inside a vehicle (10), wherein the V2X antenna (100) is connected to the first V2X antenna (200) by a first WAVE communication and to the second V2X antenna (300) by a second WAVE communication, including the V2X antenna (100): a Z-directional emitter (120) configured to perform the second WAVE communication; an XY-directional emitter (130) extending in a Z direction from a central position of the Z-directional emitter (120) in order to perform the first WAVE communication; an induction coupler (140) formed between the Z-directional emitter (120) and the XY-directional emitter (130) and configured to apply an induced current with a predetermined level to the Z-directional emitter (120) and the XY-directional emitter (130); a substrate unit (110) which is formed along an edge of the Z-directional emitter (120) such that the Z-directional emitter (120) is formed within the substrate unit (110); a power supply (150) formed within the substrate unit (110), wherein an upper part of the power supply (150) is configured to contact a lower part of the Z-directional emitter (120); and an earthing part (111) formed on the lower part of the substrate unit (110) and configured to contact the lower part of the power supply (150), wherein the induction coupler (140) is formed in a cross shape, starting at a center of the XY-directional emitter (130), and wherein the radiation directivity patterns and / or radiation directivity intensities of the Z-directional emitter (120) and / or the XY-directional emitter (130) are varied by means of biased directions of the position of the current feeder (150). [14] V2X communication system according to claim 13, wherein, when the induction coupler (140) includes a first induction coupler part (141) formed in an X direction and a second induction coupler part (142) formed in a Y direction and intersecting the first induction coupler part (141), the length of one side of the first induction coupler part (141) and the length of one side of the second induction coupler part (142), except with respect to a crossing region between them, are equal and are within a range of 1.4 ∼ 1.8 mm. [15] V2X communication system according to claim 13, wherein the XY-directional emitter (130) comprises: a first XY-directional emitter part (131) with a rod shape and formed at a central position of the Z-directional emitter (120); and a second XY-directional emitter part (132) with a column shape and at an upper end of the first XY-directional emitter part (131) is formed, wherein the column-shaped second XY-directional emitter part (132) serves as a load. [16] V2X communication system according to claim 13, wherein the power supply (150) is biased in an X direction within the substrate unit (110) so that the Z-directional emitter (120) or XY-directional emitter (130) has radiation directivity in a ZX direction, or is biased in a Y direction within the substrate unit (110) so that the Z-directional emitter (120) or the XY-directional emitter (130) has radiation directivity in a ZY direction.

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