A four-in-one 5G vehicle-mounted ultra-wideband antenna device

Abstract

The application relates to the technical field of vehicle-mounted antennas, in particular to a four-in-one 5G vehicle-mounted ultra-wideband antenna device, which comprises a surface shell and an antenna base arranged at the bottom of the surface shell; an antenna PCB module is arranged at the upper end of the antenna base; a radio frequency connector electrically connected with the antenna PCB module is fixedly arranged on the surface shell; the antenna PCB module comprises an antenna bottom plate and a first antenna, a second antenna, a third antenna and a fourth antenna which are uniformly arranged along the antenna bottom plate and sequentially and spacedly arranged in the length direction; by uniformly arranging the four antennas along the antenna bottom plate in the circumferential direction and sequentially and spacedly arranging the four antennas in the length direction, a key breakthrough is realized in the electrical performance: the spatial layout effectively increases the physical distance between the antenna units, optimizes the electromagnetic coupling path, thereby significantly reduces the signal interference between the antenna units, and realizes high isolation.

Description

Technical Field

[0001] This application relates to the field of vehicle antenna technology, and in particular to a four-in-one 5G vehicle ultra-wideband antenna device. Background Technology

[0002] Vehicle antennas have evolved from single AM / FM broadcast antennas to multi-band, multi-functional integrated antennas. Early models were primarily used for AM / FM broadcast reception, employing telescopic or shark fin designs. With the development of automotive electronics, they gradually integrated functions such as GPS positioning, Bluetooth, and tire pressure monitoring. In the era of intelligent connected vehicles, vehicle antennas need to support bandwidth-intensive applications such as vehicle-to-everything (V2X), autonomous driving data transmission, and high-definition map updates, driving the deep application of 5G technology in automotive scenarios.

[0003] Modern vehicle antennas face challenges such as adaptability to harsh environments (high temperature, vibration, rain, snow, electromagnetic interference) and compatibility with multiple systems (avoiding signal interference between different frequency bands). To address these challenges, this application proposes a four-in-one 5G vehicle ultra-wideband antenna device. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide a four-in-one 5G vehicle-mounted ultra-wideband antenna device to solve the technical problems mentioned in the background art.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: a four-in-one 5G vehicle-mounted ultra-wideband antenna device, including a face shell and an antenna base disposed at the bottom of the face shell, an antenna PCB module is mounted on the upper end of the antenna base, and an RF connector electrically connected to the antenna PCB module is fixedly disposed on the face shell. The antenna PCB module includes an antenna base plate and a first antenna, a second antenna, a third antenna and a fourth antenna arranged evenly along the antenna base plate and spaced apart in sequence in the length direction.

[0006] By adopting the above technical solution, and arranging four antennas evenly around the circumference of the antenna base plate and spaced apart sequentially along the length, a key breakthrough in electrical performance is achieved first: this spatial layout effectively increases the physical distance between antenna elements, optimizes the electromagnetic coupling path, and thus significantly reduces signal interference between them, achieving high isolation. This effect provides the foundation for multi-channel parallel transmission in 5G MIMO technology, directly improving the system's channel capacity and data transmission rate, while also creating favorable conditions for each antenna to independently achieve full-band coverage.

[0007] Furthermore, a vibration-damping foam is fixedly installed on the top of the antenna PCB module, and the upper end of the vibration-damping foam abuts against the faceplate.

[0008] By adopting the above technical solution, the inclusion of vibration-damping foam creates an effective buffer and damping structure between the top of the antenna PCB module and the outer shell. Its core effect is a significant improvement in the physical reliability and long-term stability of the antenna device under vehicle vibration and shock environments.

[0009] Specifically, the elastic support of the vibration-damping foam can absorb and dissipate the mechanical energy from continuous vibrations and accidental impacts generated during vehicle operation, preventing this energy from being directly and rigidly transmitted to the precision PCB antenna module. This avoids loosening or damage to the antenna structure due to stress fatigue, and also ensures the stability of the predetermined spatial relative position and orientation of each antenna element, thereby maintaining the optimized radiation performance and isolation from deterioration due to mechanical vibration.

[0010] Furthermore, the antenna base plate is fixedly connected to the antenna base by bolts.

[0011] By adopting the above technical solution, this bolt-fixed connection method establishes a stable mechanical connection between the antenna base plate and the antenna base, and its core effect is to significantly enhance the structural rigidity and integrity of the antenna module.

[0012] Bolted connections provide strong and reliable fastening force, ensuring that the antenna PCB module and base will not loosen or shift under the continuous vibration and sudden impact of vehicle operation. This rigid fixation effectively suppresses PCB module wobbling, preventing not only damage to connection points due to mechanical fatigue but, more importantly, maintaining the predetermined precise spatial arrangement of the four antenna elements. Thus, the high isolation and radiation performance achieved through optimized antenna layout are maintained stably over a long period in the harsh automotive environment, ensuring reliable communication quality.

[0013] Furthermore, a silicone O-ring is installed at the connection between the faceplate and the antenna base.

[0014] By adopting the above technical solution, the installation of the silicone O-ring forms a crucial elastic sealing structure at the connection between the faceplate and the antenna base. Its core effect is to simultaneously achieve the dual functions of environmental sealing and vibration damping.

[0015] The inherent elastic deformation capability of silicone allows the O-ring to tightly fill the gaps at the joint surface, effectively preventing the intrusion of external liquid water, moisture, and salt spray. This ensures the long-term safe operation of the antenna's internal PCB module under harsh weather conditions such as rain, snow, and humidity, meeting the waterproof and corrosion-resistant requirements of automotive products. Furthermore, this elastomer introduces damping into the structural connections, absorbing some high-frequency vibration and impact energy. Together with the vibration-damping foam, it forms a multi-layered vibration-resistant protection system, further enhancing the long-term reliability of the antenna in dynamic automotive environments.

[0016] Furthermore, the antenna base is made of aluminum and has multiple sets of fixing through holes.

[0017] By adopting the above technical solution, an antenna base made of aluminum with multiple sets of fixing through holes is provided, which provides a solid foundation for the core antenna module with excellent thermal management performance, electromagnetic shielding effectiveness and high-reliability mechanical installation.

[0018] Meanwhile, the metal base serves as an effective grounding plane and electromagnetic barrier, providing an optimized radiation reference ground for the antenna and significantly reducing interference from the complex external automotive electromagnetic environment to the internal high-frequency circuits. Furthermore, multiple sets of fixing through holes allow for the use of high-strength bolts and thread-locking adhesive to securely mount the entire antenna device to the vehicle surface. This rigid mechanical connection withstands the impact of strong airflow and continuous vibration during high-speed vehicle operation, fundamentally ensuring the antenna's positional stability and structural safety under harsh operating conditions.

[0019] Furthermore, the faceplate is a cover made of fiberglass.

[0020] By adopting the above technical solution, fiberglass material possesses the combined advantages of high mechanical strength, strong weather resistance, and low electromagnetic wave penetration loss. Its robust shell structure can withstand impacts from gravel and hail during vehicle operation, effectively protecting the delicate internal antenna module. Its excellent corrosion resistance and anti-aging properties ensure that the antenna will not experience performance degradation or structural damage under harsh environments such as long-term exposure to sunlight, rain, and salt spray. More importantly, as a non-metallic dielectric material, fiberglass has excellent electromagnetic wave permeability and does not shield signals like metal enclosures, thus ensuring the integrity of the antenna's radiation pattern and transmission efficiency. Simultaneously, its stable electrical performance avoids adverse effects on the antenna's resonant frequency and impedance matching due to material aging. This design enables the antenna enclosure to provide robust physical protection while achieving "transparent" transmission of signals across the entire frequency band from 698MHz to 5200MHz.

[0021] In summary, this application includes the following beneficial technical effects: by circumferentially uniformly arranged and spaced along the length direction, high isolation between antennas and optimized radiation pattern are achieved, directly improving the capacity and transmission rate of the MIMO system, with a full-band VSWR better than 2.5:1 and a gain of not less than 3.5dBi.

[0022] The damping effect of the vibration-damping foam, the rigid fixation of the bolted connection, and the sealing and buffering of the silicone O-ring together constitute a multi-layered vibration protection system, ensuring that the antenna maintains structural integrity and stable performance under continuous vibration and impact.

[0023] The aluminum base, combined with multiple sets of fixing through holes, achieves efficient heat dissipation, electromagnetic shielding, and rigid installation on the vehicle body, meeting the requirements for IP protection and harsh vehicle operating conditions.

[0024] The integrated structure integrates four full-band antennas within a limited space. Through the coordinated design of materials and structure, it ensures high reliability, high bandwidth and long service life of vehicle-mounted 5G communication in complex environments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure in the embodiment; Figure 2 This is a schematic diagram of the antenna base structure in the embodiment; Figure 3 This is a simulation diagram of standing waves in the embodiment; Figure 4 This is the gain diagram of the process antenna in the Theta plane in the embodiment; Figure 5 This is the gain diagram of the process antenna in the Theta plane in the embodiment; Figure 6 This is the gain diagram of the process antenna in the Theta plane in the embodiment; Figure 7 This is the gain diagram of the process antenna in the Theta plane in the embodiment; Figure 8 This is the gain diagram of the process antenna in the Theta plane in the embodiment; Figure 9 Gain diagram of the process antenna in the Theta plane in the embodiment.

[0026] Reference numerals: 1. Front cover; 10. Fixing through hole; 11. RF connector; 2. Antenna base; 21. Antenna base plate; 22. Anti-vibration foam; 23. Silicone O-ring. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Example, refer to Figures 1-9 A four-in-one 5G vehicle-mounted ultra-wideband antenna device includes a face shell 1 and an antenna base 2 disposed at the bottom of the face shell 1. An antenna PCB module is mounted on the upper end of the antenna base 2. An RF connector 11 electrically connected to the antenna PCB module is fixedly disposed on the face shell 1. The antenna PCB module includes an antenna base plate 21 and a first antenna, a second antenna, a third antenna and a fourth antenna that are evenly arranged along the antenna base plate 21 and are sequentially spaced along the length direction.

[0029] By arranging four antennas evenly around the antenna base plate 21 and spacing them sequentially along its length, a key breakthrough in electrical performance was achieved. This spatial layout effectively increases the physical distance between antenna elements, optimizes the electromagnetic coupling path, and thus significantly reduces signal interference between them, achieving high isolation. This effect provides the foundation for multi-channel parallel transmission in 5G MIMO technology, directly improving the system's channel capacity and data transmission rate, while also creating favorable conditions for each antenna to independently achieve full-band coverage.

[0030] In this embodiment, a vibration-damping foam 22 is fixedly installed on the top of the antenna PCB module, and the upper end of the vibration-damping foam 22 abuts against the shell 1. The installation of the vibration-damping foam 22 forms an effective buffer and damping structure between the top of the antenna PCB module and the shell 1. Its core effect is to significantly improve the physical reliability and long-term stability of the antenna device under vehicle vibration and shock environments.

[0031] Specifically, the elastic support of the vibration-damping foam 22 can absorb and dissipate the mechanical energy from continuous vibrations and accidental impacts generated during vehicle operation, preventing this energy from being directly and rigidly transmitted to the precision PCB antenna module. This avoids loosening or damage to the antenna structure due to stress fatigue, and also ensures the stability of the predetermined spatial relative position and orientation of each antenna element, thereby maintaining the optimized radiation performance and isolation from deterioration due to mechanical vibration.

[0032] In this embodiment, the antenna base plate 21 is fixedly connected to the antenna base 2 by bolts. This bolted connection establishes a stable mechanical connection between the antenna base plate 21 and the antenna base 2, and its core effect is to significantly enhance the structural rigidity and integrity of the antenna module.

[0033] Bolted connections provide strong and reliable fastening force, ensuring that the antenna PCB module and base will not loosen or shift under the continuous vibration and sudden impact of vehicle operation. This rigid fixation effectively suppresses PCB module wobbling, preventing not only damage to connection points due to mechanical fatigue but, more importantly, maintaining the predetermined precise spatial arrangement of the four antenna elements. Thus, the high isolation and radiation performance achieved through optimized antenna layout are maintained stably over a long period in the harsh automotive environment, ensuring reliable communication quality.

[0034] In this embodiment, a silicone O-ring 23 is installed at the connection between the faceplate 1 and the antenna base 2. The installation of this silicone O-ring 23 forms a crucial elastic sealing structure at the connection between the faceplate 1 and the antenna base 2. Its core effect is to simultaneously achieve the dual functions of environmental sealing and vibration buffering.

[0035] The inherent elastic deformation capability of silicone material allows the O-ring to tightly fill the gaps at the joint surface, effectively preventing the intrusion of external liquid water, moisture, and salt spray. This ensures the long-term safe operation of the antenna's internal PCB module under harsh weather conditions such as rain, snow, and humidity, meeting the waterproof and corrosion-resistant requirements of automotive products. Furthermore, this elastomer introduces damping into the structural connections, absorbing some high-frequency vibration and impact energy. Together with the vibration-damping foam 22, it forms a multi-layered vibration-resistant protection, further enhancing the long-term reliability of the antenna in dynamic automotive environments.

[0036] The antenna base 2 is made of aluminum and has multiple sets of fixing through holes 10.

[0037] The antenna base 2, made of aluminum and featuring multiple sets of fixing through holes 10, provides a solid foundation for the core antenna module, offering excellent thermal management performance, electromagnetic shielding effectiveness, and highly reliable mechanical installation.

[0038] The excellent thermal conductivity of aluminum allows the heat generated by the antenna PCB module during operation to be quickly conducted and dissipated to the surrounding environment, preventing the device performance from deteriorating or aging prematurely due to heat accumulation, and ensuring long-term stability of electrical performance.

[0039] Meanwhile, the metal base serves as an effective grounding plane and electromagnetic barrier, providing an optimized radiation reference ground for the antenna and significantly reducing interference from the complex external vehicle electromagnetic environment to the internal high-frequency circuits. Furthermore, multiple sets of fixing through holes 10 allow for the use of high-strength bolts and thread-locking adhesive to securely mount the entire antenna device to the vehicle surface. This rigid mechanical connection withstands the impact of strong airflow and continuous vibration during high-speed vehicle operation, fundamentally ensuring the antenna's positional stability and structural safety under harsh operating conditions.

[0040] In this embodiment, the faceplate 1 is made of fiberglass. Fiberglass possesses the combined advantages of high mechanical strength, strong weather resistance, and low electromagnetic wave penetration loss. Its robust shell structure can withstand impacts from gravel and hail during vehicle operation, effectively protecting the delicate internal antenna module. Its excellent corrosion resistance and anti-aging properties ensure that the antenna will not experience performance degradation or structural damage under harsh environments such as long-term exposure to sunlight, rain, and salt spray. More importantly, as a non-metallic dielectric material, fiberglass has excellent electromagnetic wave permeability and does not shield signals like metal covers, thus ensuring the integrity of the antenna radiation pattern and transmission efficiency. At the same time, its stable electrical performance avoids adverse effects on the antenna resonant frequency and impedance matching due to material aging. This design enables the antenna cover to provide robust physical protection while achieving "transparent" transmission of signals across the entire frequency band from 698MHz to 5200MHz.

[0041] Specific implementation process: The antenna device receives 5G signals through RF connector 11 and distributes them to four independent antenna units on the antenna PCB module. The first to fourth antennas operate synchronously within ultra-wideband frequencies of 698MHz–960MHz and 1710MHz–5200MHz, utilizing MIMO technology to achieve multi-channel parallel data transmission. After signal optimization via the LC matching circuits of each antenna, high-speed, low-latency signal transmission and reception are achieved through spatial radiation pattern superposition and high isolation characteristics. The entire operation is protected by electromagnetic shielding and heat dissipation from the metal base, and continuous stable operation is ensured in harsh vehicle environments through a sealed and vibration-resistant structure.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A four-in-one 5G vehicle-mounted ultra-wideband antenna device, characterized in that, The device includes a faceplate (1) and an antenna base (2) disposed at the bottom of the faceplate (1). An antenna PCB module is mounted on the upper end of the antenna base (2). An RF connector (11) electrically connected to the antenna PCB module is fixedly disposed on the faceplate (1). The antenna PCB module includes an antenna base plate (21) and a first antenna, a second antenna, a third antenna and a fourth antenna that are evenly arranged along the antenna base plate (21) and are spaced apart in sequence along the length direction.

2. The four-in-one 5G vehicle-mounted ultra-wideband antenna device according to claim 1, characterized in that, The top of the antenna PCB module is fixedly provided with anti-vibration foam (22), and the upper end of the anti-vibration foam (22) abuts against the face shell (1).

3. The four-in-one 5G vehicle-mounted ultra-wideband antenna device according to claim 1, characterized in that, The antenna base plate (21) is fixedly connected to the antenna base (2) by bolts.

4. The four-in-one 5G vehicle-mounted ultra-wideband antenna device according to claim 1, characterized in that, A silicone O-ring (23) is installed at the connection between the faceplate (1) and the antenna base (2).

5. The four-in-one 5G vehicle-mounted ultra-wideband antenna device according to claim 4, characterized in that, The antenna base (2) is made of aluminum and has multiple sets of fixing through holes (10).

6. The four-in-one 5G vehicle-mounted ultra-wideband antenna device according to claim 5, characterized in that, The face shell (1) is a cover made of fiberglass.

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