Multifunction integrated shark fin antenna for vehicle

Abstract

The utility model discloses a kind of multifunctional integrated vehicle-mounted shark fin antennas, including streamline shark fin antenna cover, modular load-bearing base, heat dissipation base, first circuit board, second circuit board, dielectric plate, GNSS navigation positioning antenna, AM / FM wideband antenna and DAB antenna, the streamline shark fin antenna cover cover modular load-bearing base;The heat dissipation base is fixedly installed in the modular load-bearing base, the heat dissipation base is equipped with first installation area and second installation area and wire slot is equipped between the first installation area and the second installation area, the first installation area is equipped with a plurality of first magnetic positioning column and the second installation area is equipped with a plurality of second magnetic positioning column.The utility model discloses a kind of multifunctional integrated vehicle-mounted shark fin antennas, solve the existing vehicle-mounted shark fin antenna frequency band coverage narrow, poor heat dissipation, sealing unreliable, difficult to assemble and maintain and the problem of weak environmental adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle communication equipment technology, specifically relating to a multi-functional integrated vehicle shark fin antenna. Background Technology

[0002] As automotive electronics technology upgrades towards intelligence and connectivity, vehicle antennas have evolved from traditional single AM / FM reception functions to multi-band, multi-system integration. The shark fin design, balancing aerodynamics and vehicle aesthetics, has become the mainstream form for current vehicle antennas. However, existing vehicle shark fin antennas still have many technical shortcomings in practical applications, making it difficult to meet the high-performance requirements of complex in-vehicle environments. 1. Limited frequency band coverage and poor signal stability: Existing DAB antennas mostly use a single trace or a simple tortuous structure, with a bandwidth covering only 535KHz-108MHz. In urban high-rise areas and environments with multiple electromagnetic interferences, the receiving sensitivity is low, and signal interruption is easy to occur when switching between multiple systems. GNSS navigation antennas are mostly single-layer patch structures, with insufficient isolation design from AM / FM and DAB antennas, resulting in serious coupling interference between different frequency signals, which affects the accuracy and stability of navigation and positioning.

[0003] 2. Low heat dissipation efficiency: The integration of multiple modules leads to the concentration of heat inside the antenna. However, the existing design only relies on silicone pads or simple fins for heat dissipation. The heat dissipation path is discontinuous and the thermal resistance is high. When the temperature of the components exceeds 60℃, signal attenuation and accelerated aging will occur, which will shorten the service life of the antenna. Utility Model Content

[0004] The main purpose of this invention is to provide a multifunctional integrated vehicle-mounted shark fin antenna that solves the problems of narrow frequency band coverage, poor heat dissipation, unreliable sealing, difficult assembly and maintenance, and weak environmental adaptability of existing vehicle-mounted shark fin antennas.

[0005] To achieve the above objectives, this utility model provides a multifunctional integrated vehicle-mounted shark fin antenna, comprising a streamlined shark fin antenna cover, a modular load-bearing base, a heat dissipation base, a first circuit board, a second circuit board, a dielectric board, a GNSS navigation and positioning antenna, an AM / FM broadband antenna, and a DAB antenna, wherein: The streamlined shark fin antenna cover is mounted on the modular load-bearing base; The heat dissipation base is fixedly installed on the modular load-bearing base. The heat dissipation base is provided with a first installation area and a second installation area, and a wire slot is provided between the first installation area and the second installation area. The first installation area is provided with a plurality of first magnetic positioning posts and the second installation area is provided with a plurality of second magnetic positioning posts. The first circuit board is initially installed in the first installation area using the first magnetic positioning post and then fixed in the first installation area using screws; the GNSS navigation and positioning antenna is installed on the first circuit board; The second circuit board is initially installed in the second mounting area by the second magnetic positioning post and then fixed in the second mounting area by screws; the dielectric board is fixedly installed on the second circuit board and the AM / FM broadband antenna and the DAB antenna are both located on the dielectric board.

[0006] As a further preferred technical solution of the above technical solution, the GNSS navigation and positioning antenna includes a ceramic dielectric layer and a GNSS patch. The ceramic dielectric layer is mounted on the first circuit board and the GNSS patch is mounted on top of the ceramic dielectric layer. The GNSS patch has a GNSS feed point at its center. The first circuit board is also provided with an external wire, which is connected to the outside through a slot in the wire.

[0007] As a further preferred technical solution of the above technical solution, for an AM / FM broadband antenna, vias are made on both sides of the dielectric substrate and a first Z-shaped metal wire is distributed in the vias; a first extended metal wire is provided at the top of the antenna and the antenna is fed through a first feed point at the bottom of the antenna.

[0008] As a further preferred technical solution of the above technical solution, for the DAB antenna, vias are made above and below the dielectric substrate and second Z-shaped metal wires are distributed in the vias; a metal patch is provided on the top of the antenna and is fed through a second feed point at the bottom of the antenna, and the metal patch is provided with a second extended metal wire.

[0009] As a further preferred technical solution to the above technical solution, the modular load-bearing base is provided with a waterproof connector at the cable outlet.

[0010] The beneficial effects of this utility model are as follows: 1. High-efficiency multi-band integration: AM / FM, GNSS, and DAB modules are integrated through innovative structural design, covering multiple frequency bands with high isolation, avoiding existing patented core designs (such as H-shaped webs and simple isolators), and combining compatibility and innovation.

[0011] 2. Significantly improved heat dissipation efficiency: The aluminum heat sink base avoids signal attenuation caused by high temperature.

[0012] 3. Highly efficient assembly and maintenance: The magnetic quick-release structure improves assembly efficiency, supports module-level maintenance, and significantly enhances ease of operation. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model (the streamlined shark fin antenna cover is hidden).

[0015] Figure 3 This is a structural schematic diagram of the modular load-bearing base and heat dissipation base of this utility model.

[0016] Figure 4 This is a schematic diagram of the AM / FM broadband antenna and DAB antenna of this utility model.

[0017] The reference numerals in the attached figures include: 10, streamlined shark fin radome; 20, modular load-bearing base; 21, waterproof connector; 30, heat dissipation base; 31, first mounting area; 32, second mounting area; 33, wire slot; 34, first magnetic positioning post; 35, second magnetic positioning post; 40, first circuit board; 41, external wire; 50, second circuit board; 60, dielectric substrate; 71, ceramic dielectric layer; 72, GNSS patch; 73, GNSS feed point; 81, first Z-shaped metal wire; 82, first extended metal wire; 83, first feed point; 91, second Z-shaped metal wire; 92, metal patch; 93, second feed point; 94, second extended metal wire. Detailed Implementation

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] This utility model discloses a multifunctional integrated vehicle-mounted shark fin antenna. The specific embodiments of the utility model are further described below with reference to preferred embodiments.

[0020] In the embodiments of this utility model, those skilled in the art will note that the streamlined shark fins and the like involved in this utility model can be considered as prior art.

[0021] Preferred embodiment.

[0022] like Figure 1-4 As shown, this utility model discloses a multifunctional integrated vehicle-mounted shark fin antenna, including a streamlined shark fin antenna cover 10, a modular load-bearing base 20, a heat dissipation base 30, a first circuit board 40, a second circuit board 50, a dielectric board 60, a GNSS navigation and positioning antenna, an AM / FM broadband antenna, and a DAB antenna, wherein: The streamlined shark fin antenna radome 10 is covered by the modular load-bearing base 20; The heat dissipation base 30 is fixedly installed on the modular load-bearing base 20. The heat dissipation base 30 is provided with a first installation area 31 and a second installation area 32, and a wire slot 33 is provided between the first installation area 31 and the second installation area 32 (isolation between the first and second installation areas). The first installation area 31 is provided with a plurality of first magnetic positioning posts 34 and the second installation area 32 is provided with a plurality of second magnetic positioning posts 35. (The bottom of the heat dissipation base is coated with thermal grease to ensure close contact with the modular load-bearing base and rapid heat conduction. Each antenna is located above the heat dissipation base to achieve synchronous heat dissipation of each antenna, effectively control the module operating temperature, and avoid performance degradation caused by high temperature). The first circuit board 40 is initially installed in the first mounting area 31 by the first magnetic positioning post 34 and then fixed in the first mounting area 31 by screws; the GNSS navigation and positioning antenna is installed on the first circuit board 40. The second circuit board 50 is initially installed in the second mounting area 32 by the second magnetic positioning post 35 and then fixed in the second mounting area 32 by screws; the dielectric board 60 is fixedly installed in the second circuit board 50 and the AM / FM broadband antenna and the DAB antenna are both located on the dielectric board.

[0023] Specifically, the GNSS navigation and positioning antenna includes a ceramic dielectric layer 71 and a GNSS patch 72. The ceramic dielectric layer 71 is mounted on the first circuit board 40, and the GNSS patch 72 is mounted on top of the ceramic dielectric layer 71. A GNSS feed point 73 is provided at the center of the GNSS patch 72. The first circuit board 40 is also provided with an external wire 41, which is connected to the outside through the wire slot 33. (The first circuit board is an FR4 substrate (40mm×25mm×30mm), with a grounding copper foil layer (40μm thick) fully covering the bottom surface. A ceramic dielectric layer (alumina ceramic, 20mm×20mm×5mm) is pasted onto the center of the top surface through a hot-pressing process. The upper GNSS patch (copper foil, 15mm×15mm×40μm) is attached to the top surface of the ceramic dielectric layer through a conductive metal coating, and a feed point (0.8mm in diameter) is formed by drilling a hole in the center.)

[0024] More specifically, for the AM / FM broadband antenna, vias are made on both sides of the dielectric substrate 60, and first Z-shaped metal wires 81 are distributed through the vias; a first extended metal wire 82 is provided at the top of the antenna, and the antenna is fed through a first feed point 83 at the bottom of the antenna (using vias on both sides of the dielectric substrate of polytetrafluoroethylene material (1mm thick), and 1mm wide "Z"-shaped metal wires on both sides of the dielectric substrate to achieve electromagnetic wave radiation in the FM / AM band. At the top of the antenna, an additional first extended metal wire with a width of 1mm is extended to tune the radiation performance of the FM / AM antenna. The antenna is fed through the first feed point. The coupling degree of the FM / AM antenna is adjusted by changing the length and width of the first extended metal wire).

[0025] Furthermore, for the DAB antenna, vias are made above and below the dielectric substrate 60, and second Z-shaped metal wires 91 are distributed through the vias; a metal patch 92 is provided at the top of the antenna, and the antenna is fed through a second feed point 93 at the bottom. The metal patch 92 is provided with a second extended metal wire 94 (the "Z"-shaped metal wire of the DAB antenna is routed through vias, located above and below the polytetrafluoroethylene (FR4) dielectric substrate respectively. The metal trace is connected to the signal source through the second feed point to achieve feeding. Above the 1mm wide metal trace, a metal radiating patch is connected to broaden the antenna's operating bandwidth and adjust impedance matching for antenna bandwidth expansion and antenna performance tuning; the coupling degree of the DAB antenna is adjusted by changing the length and width of the second extended metal wire).

[0026] Furthermore, the modular load-bearing base / 20 is equipped with a waterproof connector 21 at the cable outlet.

[0027] Preferably, a sealing structure is provided at the connection between the streamlined shark fin antenna radome and the modular load-bearing base, and at the connection between the modular load-bearing base and the vehicle body wall, for double sealing; the waterproof joint of the modular load-bearing base has a built-in one-way valve, which ensures that the accumulated water is drained quickly and prevents rainwater from flowing back in, while also having a moisture-proof function, and can cope with harsh environments such as rain and high humidity.

[0028] It is worth mentioning that the streamlined shark fin and other technical features involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control methods and spatial arrangement of these technical features can be adopted by conventional choices in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0029] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multifunctional integrated vehicle-mounted shark fin antenna, characterized in that, It includes a streamlined shark fin radome, a modular load-bearing base, a heat dissipation base, a first circuit board, a second circuit board, a dielectric board, a GNSS navigation and positioning antenna, an AM / FM broadband antenna, and a DAB antenna, wherein: The streamlined shark fin antenna cover is mounted on the modular load-bearing base; The heat dissipation base is fixedly installed on the modular load-bearing base. The heat dissipation base is provided with a first installation area and a second installation area, and a wire slot is provided between the first installation area and the second installation area. The first installation area is provided with a plurality of first magnetic positioning posts and the second installation area is provided with a plurality of second magnetic positioning posts. The first circuit board is initially installed in the first installation area using the first magnetic positioning post and then fixed in the first installation area using screws; the GNSS navigation and positioning antenna is installed on the first circuit board; The second circuit board is initially installed in the second mounting area by the second magnetic positioning post and then fixed in the second mounting area by screws; the dielectric board is fixedly installed on the second circuit board and the AM / FM broadband antenna and the DAB antenna are both located on the dielectric board.

2. The multifunctional integrated vehicle-mounted shark fin antenna according to claim 1, characterized in that, The GNSS navigation and positioning antenna includes a ceramic dielectric layer and a GNSS patch. The ceramic dielectric layer is mounted on the first circuit board and the GNSS patch is mounted on top of the ceramic dielectric layer. A GNSS feed point is provided at the center of the GNSS patch. The first circuit board is also provided with an external wire, which is connected to the outside through a slot in the wire.

3. A multifunctional integrated vehicle-mounted shark fin antenna according to claim 2, characterized in that, For an AM / FM broadband antenna, vias are made on both sides of the dielectric substrate and a first Z-shaped metal wire is distributed through the vias; a first extended metal wire is provided at the top of the antenna and the antenna is fed through a first feed point at the bottom of the antenna.

4. A multifunctional integrated vehicle-mounted shark fin antenna according to claim 3, characterized in that, For the DAB antenna, vias are made above and below the dielectric substrate, and second Z-shaped metal wires are distributed through the vias; a metal patch is provided at the top of the antenna and the antenna is fed through a second feed point at the bottom of the antenna, the metal patch being provided with a second extended metal wire.

5. A multifunctional integrated vehicle-mounted shark fin antenna according to claim 1, characterized in that, The modular load-bearing base is equipped with a waterproof connector at the cable outlet.

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