T-Box adaptive multi-band antenna integrated structure

Abstract

The invention discloses a T-Box self-adaptive multi-band antenna integrated structure which comprises a shell assembly, a first PCB substrate and a communication module are arranged in the shell assembly, an integrated antenna module and a control unit are arranged on the first PCB substrate, a band switching unit is arranged in the area, close to the integrated antenna module, of the first PCB substrate, and the band switching unit is arranged in the area, close to the integrated antenna module, of the first PCB substrate. The integrated antenna module is provided with an electromagnetic shielding assembly. Through the integrated layout of the multi-band radiation units, the structural integration level is greatly improved, the installation space is effectively reduced, a plurality of vehicle-mounted installation positions do not need to be reserved additionally, and the assembly difficulty of the whole vehicle is reduced; an integrated electromagnetic shielding assembly is matched, so that electromagnetic interference can be remarkably reduced, signal loss is reduced, and the stability and communication distance of remote communication are improved; a hardware-level adaptive switching structure is adopted, signal changes of a complex driving scene can be quickly responded, the optimal working frequency band can be dynamically switched, the problem of communication interruption is avoided, and continuity and reliability of multi-frequency-band communication are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of vehicle communication equipment technology, and in particular to an adaptive multi-band antenna integration structure for a T-Box. Background Technology

[0002] With the development of vehicle networking technology, T-Box, as a core component of vehicle communication, needs to support multi-band communication requirements such as 5G, V2X, and Beidou / GPS.

[0003] In existing technologies, T-Box multi-band antennas mainly employ two schemes: First, the independent modules are scattered, which requires reserving multiple installation positions. This not only makes the layout cumbersome and takes up a lot of space, but also easily leads to electromagnetic coupling interference between multiple antennas. Secondly, the fixed integrated design lacks a handover function. This solution cannot dynamically adjust the operating frequency band according to signal quality, and is prone to communication interruptions or transmission rate reductions in complex communication environments such as tunnels and intersections.

[0004] Furthermore, the lack of targeted electromagnetic shielding design in existing integrated antennas further exacerbates signal loss and seriously affects communication reliability.

[0005] Therefore, a T-Box multi-band antenna structure with high integration, flexible frequency band adaptation, and strong anti-interference capability is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an adaptive multi-band antenna integration structure for a T-Box, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include: An adaptive multi-band antenna integrated structure for a T-Box includes a housing assembly, inside which a first PCB substrate and a communication module are disposed. An integrated antenna module and a control unit are disposed on the first PCB substrate. A frequency band switching unit is disposed on the first PCB substrate near the integrated antenna module. An electromagnetic shielding component is disposed on the integrated antenna module. Wherein: The integrated antenna module includes a second PCB substrate, a 5G radiating unit, a V2X radiating unit, and a GPS radiating unit. The second PCB substrate is fixed on the first PCB substrate. The 5G radiating unit, the V2X radiating unit, and the GPS radiating unit are arranged in an L-shape along the top of the second PCB substrate, and the three are respectively connected to the SMA feed point on the second PCB substrate through gold-plated metal springs. The input terminal of the frequency band switching unit is connected to the power supply points of the 5G radiation unit, V2X radiation unit and GPS radiation unit respectively, and the output terminal of the frequency band switching unit is connected to the communication module; the control unit is linked with the frequency band switching unit to realize adaptive frequency band switching; the electromagnetic shielding component is located on the top of the second PCB substrate and wraps around the 5G radiation unit, V2X radiation unit and GPS radiation unit.

[0008] As a preferred technical solution, the housing assembly includes an upper protective shell and a lower support, which are detachably connected by screws. The first PCB substrate is mounted on the top of the lower support, and the communication module is assembled on the top of the inner cavity of the upper protective shell.

[0009] As a preferred technical solution, both the first PCB substrate and the second PCB substrate are made of FR-4 epoxy glass cloth substrate, and both surfaces are coated with copper.

[0010] As a preferred technical solution, the 5G radiation unit, V2X radiation unit and GPS radiation unit are all made of 0.2mm thick stainless steel bent steel sheet with a bending angle of 135°; the 5G radiation unit is adapted to the 2.4GHz / 5GHz frequency band, the V2X radiation unit is adapted to the 5.9GHz frequency band, and the GPS radiation unit is adapted to the 1.5GHz frequency band.

[0011] As a preferred technical solution, the frequency band switching unit is a single-pole multi-throw radio frequency switch or an electromagnetic relay.

[0012] As a preferred technical solution, the control unit includes an MCU and a signal detection module. The MCU is soldered to the middle of the first PCB substrate. Its I2C interface is connected to the control pin of the frequency band switching unit via a ribbon cable, and its ADC interface is connected to the signal detection module. The signal detection module is electrically connected to the signal output terminal of the communication module and is used to collect RSSI values ​​of each frequency band in real time and realize adaptive switching control through a built-in algorithm.

[0013] As a preferred technical solution, the electromagnetic shielding assembly includes a shielding cover and conductive foam. The bottom of the shielding cover is soldered to the grounding copper foil of the first PCB substrate. The 5G radiation unit, V2X radiation unit and GPS radiation unit are all located in the inner cavity of the shielding cover. The conductive foam is pasted to the top of the shielding cover, and the top of the conductive foam is in close contact with the top of the inner cavity of the upper protective shell.

[0014] As a preferred technical solution, the shielding cover is a nickel-plated copper foil shielding cover with an inverted U-shaped cross-section.

[0015] As a preferred technical solution, the outer wall of the upper protective shell of the housing assembly is provided with honeycomb heat dissipation fins, and the bottom of the lower support is provided with a thermally conductive silicone pad. The thermally conductive silicone pad is attached to the vehicle mounting surface. The heat dissipation fins are integrally formed with the upper protective shell and are made of aluminum alloy to quickly dissipate the heat generated by the internal electronic components. The inner cavity of the upper protective shell is also provided with a temperature sensor, which is electrically connected to the control unit. When the internal temperature exceeds 85°C, the MCU triggers a frequency band switching priority adjustment to prioritize the operation of the low-power communication frequency band (GPS / BeiDou-3). At the same time, a high-temperature warning signal is sent to the vehicle terminal through the communication module. The MCU has a built-in frequency band switching delay compensation algorithm. When the vehicle speed is ≥60km / h, the algorithm automatically shortens the frequency band switching judgment delay to 100ms to prioritize the real-time performance of the V2X frequency band. When the vehicle speed is <60km / h, the switching delay is adjusted to 300ms to prioritize the data transmission stability of the 5G frequency band. At the same time, the algorithm allows users to customize the frequency band priority weight through the vehicle central control system to adapt to different usage scenarios.

[0016] The present invention has at least the following beneficial effects: This application significantly improves the structural integration by integrating multi-band radiating units. Compared with traditional independent antenna combination solutions, it effectively reduces installation space, eliminates the need for multiple vehicle mounting positions, and reduces the difficulty of vehicle assembly. Combined with an integrated electromagnetic shielding component, it can significantly reduce electromagnetic interference and signal loss, helping to improve the stability and communication distance of long-distance communication. The hardware-level adaptive switching structure can quickly respond to signal changes in complex driving scenarios, dynamically switch to the optimal operating frequency band, avoid communication interruption problems, and ensure the continuity and reliability of multi-band communication. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the structure of the present invention. Figure 1 ; Figure 3 This is an exploded view of the structure of the present invention. Figure 2 ; Figure 4 This is an exploded view of the integrated antenna module and electromagnetic shielding assembly of the present invention.

[0018] In the diagram: 100, housing assembly; 110, upper protective shell; 120, lower support; 200, first PCB substrate; 300, integrated antenna module; 310, second PCB substrate; 320, 5G radiating unit; 330, V2X radiating unit; 340, GPS radiating unit; 400, frequency band switching unit; 500, control unit; 510, MCU; 520, signal detection module; 600, communication module; 700, electromagnetic shielding assembly; 710, shielding cover; 720, conductive foam. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Please see Figures 1-4The present invention provides an adaptive multi-band antenna integrated structure for a T-Box, including a housing assembly 100, a first PCB substrate 200, an integrated antenna module 300, a frequency band switching unit 400, a control unit 500, a communication module 600, and an electromagnetic shielding assembly 700. The first PCB substrate 200 and the communication module 600 are both disposed within the housing assembly 100. The integrated antenna module 300, the frequency band switching unit 400, and the control unit 500 are all disposed on the first PCB substrate 200, with the frequency band switching unit 400 located close to the integrated antenna module. In area 300, an electromagnetic shielding component 700 is mounted on an integrated antenna module 300. The integrated antenna module 300 includes a second PCB substrate 310, a 5G radiating element 320, a V2X radiating element 330, and a GPS radiating element 340. The second PCB substrate 310 is fixed to the first PCB substrate 200 by two positioning pins and solder mask. The 5G radiating element 320, V2X radiating element 330, and GPS radiating element 340 are arranged in an L-shape along the top of the second PCB substrate 310, and each of the three is gold-plated. The metal spring is connected to the SMA feed point on the second PCB substrate 310. The compression of the metal spring is 0.5mm to ensure contact reliability and vibration resistance. The input of the frequency band switching unit 400 is connected to the feed points of the 5G radiating unit 320, V2X radiating unit 330, and GPS radiating unit 340 via a 1.2mm wide 50Ω microstrip line. The output of the frequency band switching unit 400 is connected to the communication module 600 via a 50Ω coaxial cable connected to an SMA-K connector. The control unit 500 and the frequency band switching unit 400 work together to achieve adaptive frequency band switching. Electromagnetic shield The shielding component 700 is located on the top of the second PCB substrate 310 and surrounds the 5G radiating unit 320, V2X radiating unit 330 and GPS radiating unit 340. This enables the integrated installation of the 5G radiating unit 320, V2X radiating unit 330 and GPS radiating unit 340. Through the linkage between the frequency band switching unit 400 and the control unit 500, multi-band adaptive switching is achieved. At the same time, the electromagnetic shielding component 700 surrounds each radiating unit to reduce external interference, thereby improving the overall integration, frequency band adaptation flexibility and anti-interference capability of the antenna structure.

[0021] The housing assembly 100 includes an upper protective shell 110 and a lower support 120 made of flame-retardant ABS plastic. The upper protective shell 110 and the lower support 120 are detachably connected by screws. The first PCB substrate 200 is mounted on the top of the lower support 120, and the communication module 600 is assembled on the top of the inner cavity of the upper protective shell 110. The detachable design of the upper protective shell 110 and the lower support 120 facilitates the assembly, inspection and maintenance of internal components, and at the same time provides a stable mounting carrier for the first PCB substrate 200 and the communication module 600, ensuring the installation reliability of internal components.

[0022] Both the first PCB substrate 200 and the second PCB substrate 310 are made of FR-4 epoxy glass cloth substrate, and both have copper plating on their surfaces with a copper plating thickness of 35μm. This adapts to the antenna signal transmission requirements, ensures the stability of signal transmission, and also has good structural strength to meet the usage requirements of the vehicle environment.

[0023] Among them, the 5G radiating unit 320, V2X radiating unit 330 and GPS radiating unit 340 all use 0.2mm thick stainless steel bent steel sheets with a bending angle of 135°; the 5G radiating unit 320 is compatible with the 2.4GHz / 5GHz frequency band, the V2X radiating unit 330 is compatible with the 5.9GHz frequency band, and the GPS radiating unit 340 is compatible with the 1.5GHz frequency band; adapting to the communication requirements of the corresponding frequency bands, ensuring normal radiation and reception of signals in each frequency band, and the bending structure design is compatible with the installation layout of the second PCB substrate 310, improving structural adaptability.

[0024] Among them, the frequency band switching unit 400 adopts the SKY13320-462LF single-pole multi-throw RF switch; it ensures the feasibility and reliability of multi-frequency band switching, and can stably realize the connection and switching of different radiating units and communication modules 600, meeting the functional requirements of adaptive frequency band adjustment.

[0025] The control unit 500 includes an STM32L412 series MCU 510 and an AD8318 signal detection module 520. The MCU 510 is soldered to the middle of the first PCB substrate 200. Its I2C interface is connected to the control pin of the frequency band switching unit 400 via a ribbon cable, and its ADC interface is connected to the signal detection module 520. The built-in algorithm trigger threshold is set to RSSI=-85dBm. The signal detection module 520 is electrically connected to the signal output terminal of the communication module 600 to collect RSSI values ​​of each frequency band in real time and realize adaptive switching control through the built-in algorithm. By acquiring the signal quality information of each frequency band in real time through the signal detection module 520, and with the help of the algorithm processing and control command output of the MCU 510, the precise control of the frequency band switching unit 400 is realized, ensuring the timeliness and accuracy of adaptive frequency band switching.

[0026] The electromagnetic shielding assembly 700 includes a shielding cover 710 and 3mm thick conductive foam 720. The bottom of the shielding cover 710 is soldered to the grounding copper foil of the first PCB substrate 200 through six solder points. The 5G radiation unit 320, V2X radiation unit 330 and GPS radiation unit 340 are all located in the inner cavity of the shielding cover 710. The conductive foam 720 is pasted on the top of the shielding cover 710. The top of the conductive foam 720 is tightly attached to the top of the inner cavity of the upper protective shell 110. After being fastened with the upper protective shell 110, the conductive foam 720 is compressed by 1mm. The shielding cover 710 and the grounding copper foil are connected to form a closed shielding space. With the close fit design of the conductive foam 720, the electromagnetic shielding effect is further enhanced. At the same time, the conductive foam 720 can play a buffering and protective role, reducing the impact of vibration on the radiation unit.

[0027] Among them, the shielding cover 710 is a nickel-plated copper foil shielding cover with an inverted U-shaped cross section; the nickel-plated copper foil material improves the shielding performance, and the inverted U-shaped cross section design is adapted to the wrapping requirements of the radiating unit, which can fully cover the periphery of the radiating unit, ensure the comprehensiveness of the shielding, and adapt to the internal installation space layout.

[0028] The working principle of this invention is as follows: When the T-Box is powered on, the signal detection module 520 in the control unit 500 maintains a signal connection with the communication module 600, and collects signal quality information of the three frequency bands of 5G, V2X and GPS in real time; after receiving the information transmitted by the signal detection module 520, the MCU 510 judges the communication status of each frequency band through the built-in algorithm and selects the optimal working frequency band; then the MCU 510 sends a control command to the frequency band switching unit 400 through the control pin, driving the frequency band switching unit 400 to switch to the connection channel of the corresponding radiating unit, so that the radiating unit and the communication module 600 establish a stable connection and realize communication in that frequency band; If the RSSI of the 5G band is ≥-85dBm (meets the requirements for high-speed data transmission), then the frequency band switching unit 400 will connect to the 5G radiation unit 320 to prioritize data services such as vehicle entertainment and remote diagnostics. When the vehicle enters the tunnel, the RSSI of the 5G band drops below -90dBm. The MCU 510 immediately sends a control signal to the frequency band switching unit 400 to switch to the GPS radiation unit 340 to ensure continuous positioning signal. When a vehicle approaches an intersection, the RSSI of the V2X band rises to -75dBm, and the band switching unit 400 automatically connects to the V2X radiation unit 330 to support vehicle-road cooperative early warning function. Throughout the operation, the electromagnetic shielding component 700 encloses each radiating unit, reducing interference from the external electromagnetic environment and preventing coupling interference between the radiating units, thus ensuring the stability of signal transmission. When changes in the driving environment cause a decrease in the signal quality of the current frequency band, the signal detection module 520 captures the changes in real time and feeds them back to the MCU 510. The MCU 510 repeats the above judgment and control process to achieve dynamic adaptive switching of the frequency band, ensuring continuous and stable communication.

[0029] Example 2 The adaptive multi-band antenna integration structure of the T-Box provided in this embodiment differs from that in Embodiment 1 in that: The frequency band switching unit 400 uses a G6K-2F-Y type electromagnetic relay. The relay input terminal is connected to each radiation unit through wires, and the control terminal is still connected to the MCU 510. The layout position of the relay on the first PCB substrate 200 is adjusted. This solution has lower cost and stronger load capacity (≥20W), and is suitable for commercial vehicles and special vehicle T-Boxes.

[0030] Example 3 The adaptive multi-band antenna integration structure of the T-Box provided in this embodiment differs from that in Embodiment 2 in that: Each radiating element is replaced with a 0.1mm thick FPC flexible antenna. The FPC antenna is attached to the inner wall (top and side) of the upper housing 110 with adhesive backing and connected to the feed point of the second PCB substrate 310 via a coaxial cable. The size of the second PCB substrate 310 of the integrated antenna module 300 is reduced, further saving space and making it suitable for scenarios with extremely limited vehicle space, such as microcars and new energy vehicles.

[0031] Example 4 This embodiment provides an adaptive multi-band antenna integration structure for a T-Box, which differs from Embodiment 3 in that: the outer wall of the upper shell 110 of the housing assembly 100 is provided with honeycomb heat dissipation fins, and the bottom of the lower support 120 is provided with a thermally conductive silicone pad. The thermally conductive silicone pad is attached to the vehicle mounting surface. The heat dissipation fins are integrally formed with the upper shell 110 and are made of aluminum alloy to quickly dissipate the heat generated by the internal electronic components. The inner cavity of the upper shell 110 is also provided with a temperature sensor, which is electrically connected to the control unit 500. When the internal temperature exceeds 85°C, the MCU 510 triggers the frequency band switching priority adjustment, giving priority to the operation of the low-power communication frequency band (GPS / BeiDou-3), and at the same time sends a high-temperature warning signal to the vehicle terminal through the communication module 600. The honeycomb-shaped heat dissipation fins on the outer wall of the upper shell 110 cooperate with the thermally conductive silicone pad at the bottom of the lower support 120. The thermally conductive silicone pad is in contact with the vehicle mounting surface, which can quickly dissipate the heat generated by the electronic components inside the shell assembly 100. This avoids the internal temperature from being too high and causing adverse effects on the working performance of components such as the first PCB substrate 200, integrated antenna module 300, and control unit 500, ensuring that each component operates stably in a suitable temperature environment.

[0032] The temperature sensor inside the upper housing 110 is electrically connected to the control unit 500, which can monitor the internal temperature status in real time. When the temperature is abnormal, the MCU 510 triggers the frequency band switching priority adjustment, giving priority to ensuring the operation of the radiation unit corresponding to the low-power communication frequency band, avoiding the interruption of core communication functions under high temperature, and maintaining basic vehicle communication requirements.

[0033] When the temperature is abnormal, the communication module 600 sends a high temperature warning signal to the vehicle terminal, which allows users to know the internal temperature of the T-Box in time, so that users can take corresponding measures in time, reduce the risk of equipment failure caused by continuous high temperature, and extend the overall service life of the equipment.

[0034] The MCU 510 incorporates a frequency band switching delay compensation algorithm. When the vehicle speed is ≥60km / h, the algorithm automatically shortens the frequency band switching judgment delay to 100ms, prioritizing the real-time performance of the V2X frequency band. When the vehicle speed is <60km / h, the switching delay is adjusted to 300ms, prioritizing the data transmission stability of the 5G frequency band. The algorithm also allows users to customize the frequency band priority weights through the in-vehicle central control system to adapt to different usage scenarios.

[0035] The built-in frequency band switching delay compensation algorithm of MCU 510 dynamically adjusts the frequency band switching judgment delay according to vehicle speed. When the vehicle speed is high, the switching delay is shortened, which can ensure that the frequency band corresponding to V2X radiation unit 330 responds in a timely manner, meet the needs of scenarios with high real-time communication requirements such as vehicle-road cooperative early warning, and avoid the problem of insufficient real-time performance caused by switching delay.

[0036] Among them, adjusting the switching delay at lower vehicle speeds can reduce unnecessary frequent frequency band switching, ensure the data transmission stability of the 5G radiating unit 320, adapt to business scenarios with high requirements for data transmission continuity, such as in-vehicle entertainment and remote diagnostics, and improve the user experience of related data services.

[0037] The algorithm allows users to customize frequency band priority weights through the vehicle's central control system, enabling the T-Box adaptive multi-band antenna integration structure to adapt to the usage habits and diverse scenario requirements of different users, enhancing the structure's versatility and practicality, and meeting the personalized needs of different vehicle communication scenarios.

[0038] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive multi-band antenna integration structure for a T-Box, characterized in that, The device includes a housing assembly (100), which contains a first PCB substrate (200) and a communication module (600). The first PCB substrate (200) has an integrated antenna module (300) and a control unit (500). The first PCB substrate (200) has a frequency band switching unit (400) located near the integrated antenna module (300). The integrated antenna module (300) has an electromagnetic shielding assembly (700).

2. The adaptive multi-band antenna integration structure of the T-Box according to claim 1, characterized in that: The integrated antenna module (300) includes a second PCB substrate (310), a 5G radiating unit (320), a V2X radiating unit (330), and a GPS radiating unit (340). The second PCB substrate (310) is fixed on the first PCB substrate (200). The 5G radiating unit (320), the V2X radiating unit (330), and the GPS radiating unit (340) are arranged in an L-shape along the top of the second PCB substrate (310), and the three are respectively connected to the SMA feed point on the second PCB substrate (310) through gold-plated metal springs.

3. The adaptive multi-band antenna integration structure of the T-Box according to claim 2, characterized in that: The input terminal of the frequency band switching unit (400) is connected to the power supply points of the 5G radiation unit (320), the V2X radiation unit (330), and the GPS radiation unit (340), respectively. The output terminal of the frequency band switching unit (400) is connected to the communication module (600). The control unit (500) works in conjunction with the frequency band switching unit (400) to achieve adaptive frequency band switching. The electromagnetic shielding component (700) is located on the top of the second PCB substrate (310) and surrounds the 5G radiation unit (320), the V2X radiation unit (330), and the GPS radiation unit (340).

4. The adaptive multi-band antenna integration structure of the T-Box according to claim 2, characterized in that: The housing assembly (100) includes an upper protective shell (110) and a lower support (120), which are detachably connected by screws. The first PCB substrate (200) is mounted on the top of the lower support (120), and the communication module (600) is assembled on the top of the inner cavity of the upper protective shell (110).

5. The adaptive multi-band antenna integration structure of the T-Box according to claim 2, characterized in that: Both the first PCB substrate (200) and the second PCB substrate (310) are made of FR-4 epoxy glass cloth substrate, and both are coated with copper.

6. The adaptive multi-band antenna integration structure of the T-Box according to claim 2, characterized in that: The 5G radiation unit (320), V2X radiation unit (330) and GPS radiation unit (340) are all made of 0.2mm thick stainless steel bent steel sheet with a bending angle of 135°. The 5G radiation unit (320) is adapted to the 2.4GHz / 5GHz frequency band, the V2X radiation unit (330) is adapted to the 5.9GHz frequency band, and the GPS radiation unit (340) is adapted to the 1.5GHz frequency band.

7. The adaptive multi-band antenna integration structure of the T-Box according to claim 1, characterized in that: The frequency band switching unit (400) is a single-pole multi-throw radio frequency switch or an electromagnetic relay.

8. The adaptive multi-band antenna integration structure of the T-Box according to claim 5, characterized in that: The control unit (500) includes an MCU (510) and a signal detection module (520). The MCU (510) is soldered to the middle of the first PCB substrate (200). Its I2C interface is connected to the control pin of the frequency band switching unit (400) via a ribbon cable, and its ADC interface is connected to the signal detection module (520). The signal detection module (520) is electrically connected to the signal output terminal of the communication module (600) and is used to collect RSSI values ​​of each frequency band in real time and realize adaptive switching control through a built-in algorithm.

9. The adaptive multi-band antenna integration structure of the T-Box according to claim 6, characterized in that: The electromagnetic shielding assembly (700) includes a shielding cover (710) and conductive foam (720). The bottom of the shielding cover (710) is soldered to the grounding copper foil of the first PCB substrate (200) by solder joints. The 5G radiation unit (320), V2X radiation unit (330) and GPS radiation unit (340) are all located in the inner cavity of the shielding cover (710). The conductive foam (720) is pasted on the top of the shielding cover (710). The top of the conductive foam (720) is in close contact with the top of the inner cavity of the upper protective shell (110). The shielding cover (710) is a nickel-plated copper foil shielding cover with an inverted U-shaped cross section.

10. The adaptive multi-band antenna integration structure of the T-Box according to claim 9, characterized in that: The outer wall of the upper shell (110) of the housing assembly (100) is provided with honeycomb heat dissipation fins, and the bottom of the lower support (120) is provided with a thermally conductive silicone pad. The thermally conductive silicone pad is attached to the vehicle mounting surface. The heat dissipation fins are integrally formed with the upper shell (110) and are made of aluminum alloy to quickly dissipate the heat generated by the internal electronic components. The inner cavity of the upper shell (110) is also provided with a temperature sensor. The temperature sensor is electrically connected to the control unit (500). When the internal temperature exceeds 85°C, the MCU (510) triggers the frequency band switching priority adjustment to prioritize the operation of the low-power communication frequency band. At the same time, a high temperature warning signal is sent to the vehicle terminal through the communication module (600). The MCU (510) has a built-in frequency band switching delay compensation algorithm. When the vehicle speed is ≥60km / h, the algorithm automatically shortens the frequency band switching judgment delay to 100ms to prioritize the real-time performance of the V2X frequency band. When the vehicle speed is <60km / h, the switching delay is adjusted to 300ms to prioritize the data transmission stability of the 5G frequency band. At the same time, the algorithm allows users to customize the frequency band priority weight through the vehicle central control system to adapt to different usage scenarios.

Images