A V2X antenna structure

Abstract

The application relates to the technical field of V2X antennas, in particular to a V2X antenna structure which comprises a first radiation unit, a second radiation unit and a radiation slot unit; the first radiation unit comprises a first radiation branch, a second radiation branch and a feeding branch; the second radiation unit comprises a third radiation branch and a fourth radiation branch; the radiation slot unit is formed by the first radiation branch, the second radiation branch and the fourth radiation branch; and a radio frequency coaxial line comprises an outer conductor and an inner conductor. Compared with the prior art, the application has the advantages that the antenna has good performance on metal surfaces and non-metal surfaces, has the characteristics of small size and low profile, can be applied to metal surfaces, has high antenna gain, is simple to manufacture, has excellent performance, is convenient to install and use, and is easy to popularize.

Description

Technical Field

[0001] This invention relates to the field of V2X antenna technology, specifically a V2X antenna structure. Background Technology

[0002] V2X (Vehicle to Everything) is a technology that enables vehicles to interact with everything in the outside world; it can be understood as connecting vehicles to everything in the environment. V2X is a key technology for intelligent transportation systems. It enables communication between vehicles, between vehicles and base stations, and between base stations. This allows for the acquisition of real-time traffic conditions, road information, pedestrian information, and other traffic data, thereby improving driving safety, reducing congestion, increasing traffic efficiency, and providing in-vehicle entertainment information.

[0003] The realization of V2X technology is inseparable from the development of V2X antennas. Currently, traditional V2X antennas are placed on the shark fin area of ​​the vehicle roof. Due to the impact of the metal body on antenna performance, the antenna needs to be relatively large, while active antennas that can reduce size have the disadvantage of high cost. There is an urgent need in the market for an antenna structure that can be applied to metal surfaces while maintaining high antenna gain. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an antenna structure that can still operate on a metal surface and meet high gain requirements with small size and low profile.

[0005] To achieve the above objectives, a V2X antenna structure is designed, comprising a first radiating element, which includes a first radiating segment, a second radiating segment, and a feed segment, the first radiating segment and the feed segment being connected through the second radiating segment; a second radiating element, which includes a third radiating segment and a fourth radiating segment, the third radiating segment and the fourth radiating segment being interconnected, the third radiating segment being connected to the first radiating segment of the first radiating element through the fourth radiating segment; a radiating slot element, which is formed by the first radiating segment, the second radiating segment, and the fourth radiating segment; and an RF coaxial line, which includes an outer conductor and an inner conductor, the outer conductor being connected to the third radiating segment of the second radiating element, and the inner conductor being connected to the feed segment of the first radiating element.

[0006] Preferably, the first radiating segment is connected to one end of the second radiating segment on the side near the radio frequency coaxial line, the other end of the second radiating segment is connected to the feed segment, the upper edge of the third radiating segment is connected to one end of the fourth radiating segment, the other end of the fourth radiating segment is connected to the first radiating segment, a notch is provided on one side of the upper part of the first radiating segment, and the space formed by the notch of the first radiating segment, the second radiating segment and the fourth radiating segment is a radiating slot unit.

[0007] Preferably, the characteristic impedance of the radio frequency coaxial cable is 50 ohms.

[0008] Preferably, the outer conductor of the radio frequency coaxial line is electrically connected to the third radiating segment of the second radiating unit.

[0009] Preferably, the inner conductor of the radio frequency coaxial line is electrically connected to the feed branch of the first radiating unit.

[0010] Preferably, the radiating slot unit is used to adjust the impedance of the radiating unit so that impedance matching is achieved when the antenna structure is connected to the radio frequency coaxial line.

[0011] Preferably, the first radiating unit and the second radiating unit are integrally bent from hardware.

[0012] Preferably, the first radiating unit and the second radiating unit are based on a carrier and are connected by conductive materials.

[0013] Compared with the prior art, the advantages of this invention are:

[0014] 1. It exhibits good antenna performance on both metallic and non-metallic surfaces;

[0015] 2. It features small size and low profile, making it suitable for use on metal surfaces while maintaining high antenna gain;

[0016] 3. It is simple to manufacture, has excellent performance, is easy to install and use, and is easy to promote. Attached Figure Description

[0017] Figure 1 This is a top view of the antenna structure of the present invention;

[0018] Figure 2 This is a perspective view of the antenna structure of the present invention;

[0019] Figure 3 This is a dimensional diagram of the antenna structure of the present invention at the resonant frequency;

[0020] Figure 4 This is a voltage standing wave ratio (VSWR) diagram of the antenna structure of the present invention on a non-metallic surface.

[0021] Figure 5 This is a voltage standing wave ratio (VSWR) diagram of the antenna structure of the present invention on a metal surface;

[0022] Figure 6 This is the antenna radiation pattern when the antenna structure of the present invention is placed on a non-metallic surface at its resonant frequency;

[0023] Figure 7 The antenna radiation pattern of the present invention is shown when the antenna structure is placed at the resonant frequency of the metal surface.

[0024] In the figure: 1. First radiating element, 2. Second radiating element, 3. Radiating slot element, 4. Radio frequency coaxial line, 11. First radiating segment, 12. Second radiating segment, 13. Feeding segment, 21. Third radiating segment, 22. Fourth radiating segment, 41. Outer conductor, 42. Inner conductor. Detailed Implementation

[0025] See Figure 1 and Figure 2 A V2X antenna structure includes a first radiating element 1, a second radiating element 2, a radiating slot element 3, and an RF coaxial cable 4. The first radiating element 1 includes a first radiating section 11, a second radiating section 12, and a feed section 13. The first radiating section 11 and the feed section 13 are connected through the second radiating section 12.

[0026] The second radiating unit includes a third radiating segment 21 and a fourth radiating segment 22. The third radiating segment 21 and the fourth radiating segment 22 are interconnected, and the third radiating segment 21 is connected to the first radiating segment 11 of the first radiating unit 1 through the fourth radiating segment 22.

[0027] The radiating slot element 3 is formed by the first radiating segment 11, the second radiating segment 12 and the fourth radiating segment 22.

[0028] The radio frequency coaxial cable 4 includes an outer conductor 41 and an inner conductor 42. The outer conductor 41 is connected to the third radiation branch 21 of the second radiation unit 2, and the inner conductor 42 is connected to the feed branch 13 of the first radiation unit 1.

[0029] Specifically: the side of the first radiating segment closest to the radio frequency coaxial line is connected to one end of the second radiating segment, the other end of the second radiating segment is connected to the feed segment, the upper edge of the third radiating segment is connected to one end of the fourth radiating segment, the other end of the fourth radiating segment is connected to the first radiating segment, a notch is provided on one side of the upper part of the first radiating segment, and the space formed by the notch of the first radiating segment, the second radiating segment and the fourth radiating segment is the radiating slot unit.

[0030] The first radiating element, the second radiating element, and the radiating slot element together constitute the radiating body of the antenna structure. The feed section 13 of the first radiating element 1 is used to feed the antenna structure. The RF coaxial cable 4 has a characteristic impedance of 50 ohms and is used to connect the external signal source and the radiating body of the antenna structure. The first radiating element 1 and the second radiating element 2 are formed by bending a single piece of metal. In some optional embodiments, a bracket can be used as a carrier, and a flexible printed circuit board (FPCB), metal parts, or other processes such as LDS can be used to make a metal plating layer as the radiating body. The bending process of the metal parts is simple and has excellent cost advantages and promotional value.

[0031] The V2X operating frequency band can be 5.85-5.925 GHz. The resonant frequency of the antenna structure's radiating body is adjusted by changing the length and width of the first radiating section 11. The bandwidth and gain of the antenna structure's radiating body are adjusted by changing the height of the fourth radiating section 22. The length and width of the third radiating section 21 are not less than the length and width of the first radiating section 11. Taking the operating frequency (resonant frequency) of the antenna structure in this embodiment at 5.9 GHz as an example, its dimensions (unit: millimeters (mm)) are as follows... Figure 3 As shown. By adjusting the length and width of the radiating slot element 3, the characteristic impedance of the radiating body of the antenna structure can be adjusted, so that the impedance of the radiating body of the antenna structure is matched with that of the radio frequency coaxial line.

[0032] In this embodiment, the thickness of the first radiating element 1 and the second radiating element 2 is 0.3 mm, and the material is nickel-plated stainless steel (not limited to this metal material, but can also be other materials such as copper). It has good structural strength after bending and requires no other support. The antenna structure can operate on either a non-metallic surface or a metallic surface, both providing good antenna performance.

[0033] In this embodiment, the antenna structure is simulated and analyzed using CST simulation software to obtain the voltage standing wave (VSWR) of the antenna structure on the non-metallic surface, for example... Figure 4 As shown, the radiation direction of the antenna structure on the non-metallic surface is as follows: Figure 6 As shown. The voltage standing wave of the antenna structure on the metal surface is, for example... Figure 5 As shown, the radiation direction of the antenna structure on the metal surface is as follows: Figure 7 As shown. Among them, Figure 6 This is the antenna radiation pattern when the antenna structure is placed on a non-metallic surface and operates at a frequency of 5.9 GHz. Figure 7 It is the antenna radiation pattern when the antenna structure is placed on a metal surface and operates at a frequency of 5.9 GHz.

[0034] It can be seen that the voltage standing wave ratio of the antenna structure is less than 1.2 in the V2X operating frequency band (5.85-5.925GHz), the gain of the antenna structure on the non-metallic surface is about 3.5dBi, the gain on the metallic surface is about 6.1dBi, and it is omnidirectional in the horizontal plane.

[0035] exist Figure 4 Figure 5 In this context, VSWR refers to the voltage standing wave ratio, and frequency refers to the frequency. Figure 6 Figure 7In this context, Theta refers to the angle with the Z-axis, Phi refers to the angle with the X-axis, Frequency refers to the frequency, and Rlzd. Gain refers to the actual gain. As can be seen from the above embodiments, this application features small size and low profile, exhibiting excellent radiation characteristics with high gain on both non-metallic and metallic surfaces. Furthermore, it has a simple manufacturing process, is easy to install, and possesses cost advantages and promotional value.

[0036] The above description is merely a specific embodiment of the invention, but the scope of protection of the invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the invention, based on the technical solutions and novel concepts of the invention, should be covered within the scope of protection of the invention.

Claims

1. A V2X antenna structure, characterized in that... include A first radiating element, comprising a first radiating section, a second radiating section, and a feed section, wherein the first radiating section and the feed section are connected via the second radiating section; The second radiating unit includes a third radiating segment and a fourth radiating segment, the third radiating segment and the fourth radiating segment are interconnected, and the third radiating segment is connected to the first radiating segment of the first radiating unit through the fourth radiating segment. A radiating slot unit, wherein the radiating slot unit is formed by the first radiating segment, the second radiating segment, and the fourth radiating segment; The radio frequency coaxial cable includes an outer conductor and an inner conductor. The outer conductor is connected to the third radiating segment of the second radiating unit, and the inner conductor is connected to the feed segment of the first radiating unit. The antenna structure is as follows: the side of the first radiating segment closest to the radio frequency coaxial line is connected to one end of the second radiating segment, the other end of the second radiating segment is connected to the feed segment, the upper edge of the third radiating segment is connected to one end of the fourth radiating segment, the other end of the fourth radiating segment is connected to the first radiating segment, and a notch is provided on one side of the upper part of the first radiating segment. The space formed by the notch of the first radiating segment, the second radiating segment, and the fourth radiating segment is a radiating slot unit. By adjusting the length and width of the radiating slot element, the characteristic impedance of the radiating body of the antenna structure is adjusted, so that the impedance of the radiating body of the antenna structure is matched with that of the radio frequency coaxial line.

2. The V2X antenna structure as described in claim 1, characterized in that... The characteristic impedance of the radio frequency coaxial cable is 50 ohms.

3. A V2X antenna structure as described in claim 1, characterized in that... The outer conductor of the radio frequency coaxial line is electrically connected to the third radiating segment of the second radiating unit.

4. A V2X antenna structure as described in claim 1, characterized in that... The inner conductor of the radio frequency coaxial line is electrically connected to the feed branch of the first radiating unit.

5. A V2X antenna structure as described in claim 1, characterized in that... The radiating slot element is used to adjust the impedance of the radiating element so that impedance matching is achieved when the antenna structure is connected to the radio frequency coaxial line.

6. A V2X antenna structure as described in claim 1, characterized in that... The first radiating unit and the second radiating unit are integrally bent from hardware components.

7. A V2X antenna structure as described in claim 1, characterized in that... The first radiating unit and the second radiating unit are based on a carrier and are connected by conductive materials.

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