Vehicle-mounted built-in metal cavity antenna and vehicle

Abstract

The application relates to the technical field of wireless communication and vehicles, and provides a built-in metal cavity antenna for a vehicle and a vehicle, wherein the metal cavity antenna comprises a metal base arranged in the interior of the vehicle, and an inner cavity with an open side is arranged on the metal base; an antenna group is arranged in the inner cavity; and a metal cover plate is arranged on the open side of the inner cavity and fixes the antenna group. In actual application, the metal base with the inner cavity is arranged, the antenna group is arranged in the inner cavity, and the metal cover plate is arranged on the open side of the inner cavity, so that the stability of an antenna signal is ensured. The antenna with the above-mentioned design has the advantages of good signal stability, high sensitivity and strong anti-adverse environment capability in use.

Description

Technical Field

[0001] This application relates to the fields of wireless communication and vehicle technology, and in particular to a vehicle-mounted built-in metal cavity antenna and vehicle. Background Technology

[0002] With the development of society, people's travel methods have become more and more diversified. Among them, vehicles have become a common means of transportation. When traveling, people usually carry smart terminals, such as mobile phones or tablets. Alternatively, vehicles may also be equipped with smart terminals, such as smart assistants and navigation devices.

[0003] With the development of smart terminals, their demand for data traffic is increasing. For example, mobile phones, which are commonly used, generally require a high amount of data traffic during use. When people travel by car, they often run out of mobile data or have to pay high data traffic fees. In addition, more and more smart terminals need to use the network, such as smart assistants and in-vehicle terminals. Summary of the Invention

[0004] To address the high data usage demands of smart devices used by people while traveling by vehicle, this application provides an in-vehicle built-in metal cavity antenna and a vehicle.

[0005] The first aspect of this application provides a vehicle-mounted built-in metal cavity antenna, characterized in that the metal cavity antenna comprises:

[0006] A metal base, wherein the metal base is disposed inside the vehicle and the metal base has an inner cavity with an opening on one side;

[0007] Antenna group, the antenna group being disposed within the cavity;

[0008] A metal cover plate is disposed on the opening side of the inner cavity and fixes the antenna assembly.

[0009] In one implementation, the antenna array includes a metal reflector and a plurality of LDS antennas;

[0010] The metal reflector is positioned along the radiation direction of the multiple LDS antennas to enhance the magnetic field strength of the radiation surfaces of the multiple LDS antennas.

[0011] In one implementation, the LDS antenna includes a radiating element, a PCB filter, and a coaxial cable;

[0012] The radiating element and the PCB filter are connected to a coaxial cable, and the coaxial cables of the multiple LDS antennas are arranged coaxially.

[0013] In one implementation, the coaxial cable is fixed to the metal base by conductive tape.

[0014] In one implementation, the radiating unit includes a plastic bracket and an antenna metal layer disposed on the plastic bracket, wherein the antenna metal layer is provided with a first transmission end for transmitting 2.4G signals and a second transmission end for transmitting 5G signals.

[0015] In one implementation, the plastic bracket is further provided with a positioning post and a first fixing hole for fixing the plastic bracket to the metal base.

[0016] In one implementation, the number of LDS antennas is 2.

[0017] In one implementation, a second fixing hole is provided on the metal reflector, and a third fixing hole matching the second fixing hole is provided on the metal base, so as to clamp multiple LDS antennas in the inner cavity.

[0018] In one implementation, the metal base and the metal cover are made of painted aluminum sheet.

[0019] The second aspect of this application provides a vehicle in which a vehicle-mounted built-in metal cavity antenna, as provided in the first aspect of this application, is disposed.

[0020] As can be seen from the above technical solutions, the embodiments of this application provide a vehicle-mounted built-in metal cavity antenna and a vehicle. The metal cavity antenna includes: a metal base, which is disposed inside the vehicle and has an inner cavity with an opening on one side; an antenna group, which is disposed in the inner cavity; and a metal cover plate, which is disposed on the opening side of the inner cavity and fixes the antenna group.

[0021] In practical applications, by setting a metal base with an inner cavity and placing the antenna assembly in the inner cavity, and then sealing the opening side of the inner cavity with the metal cover plate, the stability of the antenna signal is ensured. This type of antenna design has the advantages of good signal stability, high sensitivity, and strong resistance to harsh environments during use. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall structure of a vehicle-mounted built-in metal cavity antenna provided for an embodiment of this application;

[0024] Figure 2 Provided for the embodiments of this application Figure 1 A schematic diagram of the exploded structure;

[0025] Figure 3 This is a schematic diagram of the antenna group structure provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of the radiating unit provided in an embodiment of this application.

[0027] In the diagram: 1-Metal base, 11-Inner cavity, 12-Third fixing hole, 2-Antenna group, 21-Metal reflector, 211-Second fixing hole, 22-LDS antenna, 221-Radiating element, 2211-Plastic bracket, 2212-Antenna metal layer, 2213-First transmission end, 2214-Second transmission end, 2215-Positioning post, 2216-First fixing hole, 222-PCB filter, 223-Coaxial cable, 224-Conductive tape, 3-Metal cover plate. Detailed Implementation

[0028] To address the high data usage demands of smart devices used by people while traveling by vehicle, this application provides an in-vehicle built-in metal cavity antenna and a vehicle.

[0029] Because vehicles often operate in high-speed, high-temperature, and high-vibration environments, stringent requirements are placed on the stability, sensitivity, and environmental resilience of the Wi-Fi antennas, the key nodes in wireless network communication. Existing in-vehicle Wi-Fi systems (using 4G mobile cellular networks (TD-LTE / FDD-LTE / TD-SCDMA / GSM) as data backhaul channels and LTE-to-Wi-Fi via WLAN coverage) primarily use external Wi-Fi transmitting antennas. While external Wi-Fi transmitting antennas solve the antenna gain issue, their use in vehicles presents drawbacks: Firstly, because external Wi-Fi antennas are fixed with clips, their stability is unstable. Bumps from driving can cause the connectors to loosen or detach, and the antenna angle is difficult to maintain, leading to unstable or no Wi-Fi signal. Secondly, external Wi-Fi antennas are easily damaged by impacts, often resulting in signal instability during vehicle use, thus affecting the network signal of smart terminals. In addition, some router servers use built-in antennas, but these products are just larger plastic shells with the WIFI signal antennas installed inside the machine. The plastic shells provide poor protection for the product, and the WIFI signal will be attenuated when passing through a layer of plastic shells, resulting in a narrower and weaker signal coverage. Moreover, they are troublesome to install.

[0030] See Figure 1 This is a schematic diagram of the overall structure of a vehicle-mounted built-in metal cavity antenna provided in an embodiment of this application.

[0031] See Figure 2 Provided for the embodiments of this application Figure 1 A schematic diagram of the explosion structure.

[0032] See Figure 3 This is a schematic diagram of the antenna group structure provided in an embodiment of this application.

[0033] See Figure 4 This is a schematic diagram of the structure of the radiating unit provided in the embodiment of this application.

[0034] To address the aforementioned problems, the first aspect of this application provides a vehicle-mounted, built-in metal cavity antenna, such as... Figure 1 As shown, the metal cavity antenna includes: a metal base 1, an antenna group 2, and a metal cover plate 3. The metal base 1 is disposed inside the vehicle and has an inner cavity 11 with an opening on one side. The antenna group 2 is disposed in the inner cavity 11. The metal cover plate 3 is disposed on the opening side of the inner cavity 11 and fixes the antenna group 2.

[0035] In practical applications, by setting a metal base 1 with an inner cavity 11 and placing the antenna group 2 in the inner cavity 11, and sealing the opening side of the inner cavity 11 with the metal cover plate 3, the stability of the antenna signal is ensured. This type of antenna design has the advantages of good signal stability, high sensitivity, and strong resistance to harsh environments during use.

[0036] Specifically, in some embodiments of this application, the antenna group 2 includes a metal reflector 21 and multiple LDS antennas 22 (LDS, Laser Direct Structuring technology), such as... Figure 2 As shown, the number of LDS antennas 22 can be set to 2. The metal reflector 21 is set in the radiation direction of the multiple LDS antennas 22. During use, the metal reflector 21 set in the radiation direction of the LDS antenna 22 can transmit electromagnetic waves radiated in other directions toward the radiation surface of the antenna design, thereby enhancing the magnetic field strength of the radiation surface of the LDS antenna 22 and thus enhancing the antenna signal.

[0037] like Figure 2 As shown, in order to ensure the stability of the LDS antenna 22, the metal reflector 21 is provided with a second fixing hole 211, and the metal base 1 is provided with a third fixing hole 12 that matches the second fixing hole 211, so as to clamp the multiple LDS antennas 22 in the inner cavity 11.

[0038] join Figure 3 In some embodiments of this application, the LDS antenna 22 includes a radiating element 221, a PCB filter 222, and a coaxial cable 223; the radiating element 221 and the PCB filter 222 are connected to the coaxial cable 223, and the coaxial cables 223 of the multiple LDS antennas 22 are coaxially arranged.

[0039] In practical applications, the PCB filter 222 filters out other frequency band signals in the 2.4G and 5G signals provided by the coaxial cable 223, ensuring that the 2.4G and 5G signals are not interfered with by other frequency band signals and improving signal sensitivity. The coaxial cable 223 is fixed to the metal base 1 by conductive tape 224.

[0040] Specifically, such as Figure 4 As shown, in some embodiments of this application, the radiating unit 221 includes a plastic bracket 2211 and an antenna metal layer 2212 disposed on the plastic bracket 2211. The antenna metal layer 2212 is provided with a first transmission end 2213 for transmitting 2.4G signals and a second transmission end 2214 for transmitting 5G signals.

[0041] In this embodiment, the antenna metal layer 2212 is formed by laser activation of metal particles doped within the plastic bracket 2211, thereby obtaining the patterned form of the antenna metal layer 2212. The plastic bracket 2211 is also provided with a first transmission end 2213 and a second transmission end 2214 for connecting the antenna metal layer 2212, so as to connect to the 2.4G signal output port and the 5G signal output port on the coaxial cable 223, respectively.

[0042] The vehicle-mounted built-in metal cavity antenna provided in this application embodiment addresses the shortcomings of existing built-in antenna technology by integrating 2.4G and 5G band antennas into one unit. The antenna metal layer 2212 is set through LDS process, and two LDS antennas 22 form an array. They are fixed to the metal base 1 through coaxial cable 223, thereby realizing the free setting of the installation position.

[0043] To ensure the stability of the plastic bracket 2211 and to prevent physical contact between the plastic bracket 2211 and the PCB filter 222, the plastic bracket 2211 is also provided with a positioning post 2215 and a first fixing hole 2216 for fixing the plastic bracket 2211 to the metal base 1. The positioning post 2215 can be configured as a tapered structure, thereby achieving axial positioning to a certain extent while providing radial positioning, and fixing the plastic bracket 2211 through the first fixing hole 2216.

[0044] It should be noted that the metal base 1 and the metal cover 3 provided in this application embodiment are made of the same metal material. For example, the metal base 1 and the metal cover 3 are made of painted aluminum plate.

[0045] Compared to existing FPC (Flexible Printed Circuit) antennas, PCB (Printed Circuit Board) antennas, and sheet metal antennas, which have relatively high costs and unstable antenna signal strength, the vehicle-mounted built-in metal cavity antenna provided in this application, through metal cavity process design combined with LDS technology, ensures that the antenna signal has high stability and sensitivity, as well as enhanced resistance to harsh environments.

[0046] The second aspect of this application provides a vehicle in which a vehicle-mounted built-in metal cavity antenna, as provided in the first aspect of this application, is disposed.

[0047] As can be seen from the above technical solutions, the embodiments of this application provide a vehicle-mounted built-in metal cavity antenna and a vehicle. The metal cavity antenna includes: a metal base 1, which is disposed inside the vehicle and has an inner cavity 11 with an opening on one side; an antenna group 2, which is disposed in the inner cavity 11; and a metal cover plate 3, which is disposed on the opening side of the inner cavity 11 and fixes the antenna group 2.

[0048] In practical applications, by setting a metal base 1 with an inner cavity 11 and placing the antenna group 2 in the inner cavity 11, and sealing the opening side of the inner cavity 11 with the metal cover plate 3, the stability of the antenna signal is ensured. This type of antenna design has the advantages of good signal stability, high sensitivity, and strong resistance to harsh environments during use.

[0049] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

[0050] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. Similarly, for the sake of brevity and to aid in understanding one or more aspects of the application, in the above description of exemplary embodiments of this application, various features of the embodiments are sometimes grouped together in a single embodiment, figure, or description thereof. The claims, which follow the detailed description, are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the application.

[0051] It should be noted that the above embodiments are illustrative of this application and not restrictive, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A vehicle-embedded metal cavity antenna, characterized by, The metal cavity antenna comprises: A metal base (1) is arranged in the vehicle interior, and an inner cavity (11) with an open side is arranged on the metal base (1); An antenna group (2) is arranged in the inner cavity (11); A metal cover plate (3) is arranged on the open side of the inner cavity (11) and fixes the antenna group (2); The antenna group (2) comprises a metal reflecting plate (21) and a plurality of LDS antennas (22); the metal reflecting plate (21) is arranged in the radiation direction of the plurality of LDS antennas (22) to enhance the magnetic field intensity of the radiation surface of the plurality of LDS antennas (22); The LDS antenna (22) comprises a radiation unit (221), a PCB filter (222) and a coaxial cable (223); the radiation unit (221) and the PCB filter (222) are connected on the coaxial cable (223), and the coaxial cables (223) of the plurality of LDS antennas (22) are coaxially arranged; The radiation unit (221) comprises a plastic support (2211) and an antenna metal layer (2212) arranged on the plastic support (2211); the antenna metal layer (2212) is provided with a first transmission end (2213) for transmitting a 2.4G signal and a second transmission end (2214) for transmitting a 5G signal.

2. The vehicle-mounted metal cavity antenna according to claim 1, characterized in that, The coaxial cable (223) is fixed on the metal base (1) by a conductive adhesive tape (224).

3. The vehicle-mounted metal cavity antenna according to claim 1, wherein The plastic support (2211) is further provided with a positioning column (2215) and a first fixing hole (2216) for fixing the plastic support (2211) on the metal base (1).

4. The vehicle-mounted metal cavity antenna according to claim 1, wherein The number of the LDS antennas (22) is 2.

5. The vehicle-mounted metal cavity antenna according to claim 1, wherein The metal reflecting plate (21) is provided with a second fixing hole (211), and the metal base (1) is provided with a third fixing hole (12) matched with the second fixing hole (211) to clamp the plurality of LDS antennas (22) in the inner cavity (11).

6. The vehicle-mounted antenna-in metal cavity according to claim 1, wherein, The materials of the metal base (1) and the metal cover plate (3) are baked aluminum plates.

7. A vehicle characterized by comprising: The vehicle interior is provided with the vehicle-mounted built-in metal cavity antenna according to any one of claims 1-6.

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