CN117613542A - Vehicle-mounted antenna unit, vehicle-mounted antenna system and vehicle - Google Patents
Vehicle-mounted antenna unit, vehicle-mounted antenna system and vehicle Download PDFInfo
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- CN117613542A CN117613542A CN202410004680.8A CN202410004680A CN117613542A CN 117613542 A CN117613542 A CN 117613542A CN 202410004680 A CN202410004680 A CN 202410004680A CN 117613542 A CN117613542 A CN 117613542A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
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Abstract
The application relates to a vehicle-mounted antenna unit, vehicle-mounted antenna system and vehicle, vehicle-mounted antenna unit includes: a first antenna module, a second antenna module, a third antenna module, and a fourth antenna module; the first antenna module comprises a 2G multi-band antenna, a 3G multi-band antenna and a 4G multi-band antenna; the second antenna module comprises a 5G multi-band antenna, a WIFI multi-band antenna and a Bluetooth multi-band antenna; the third antenna module comprises a multi-band positioning antenna; the fourth antenna module comprises a 6G antenna array; the first antenna module, the second antenna module, the third antenna module and the fourth antenna module are respectively arranged in different areas of the vehicle-mounted antenna unit. According to the vehicle-mounted antenna unit, on the premise that good isolation degree of each antenna is guaranteed and the isolation degree of each antenna is not affected mutually, the antenna modules of different types are arranged in different areas, the antenna modules are reasonably distributed, and the performance of the vehicle-mounted antenna is improved.
Description
Technical Field
The application relates to the technical field of vehicle-mounted antennas, in particular to a vehicle-mounted antenna unit, a vehicle-mounted antenna system and a vehicle.
Background
The existing vehicle-mounted antennas are distributed and located at different positions of an automobile, the single antenna is single in function, only information such as AM/FM broadcasting, WIFI and BT can be received and transmitted, few antennas for communication and multimedia service are provided, and an antenna system for 6G application scene service is provided, so that the communication requirement of 'everything interconnection' is difficult to adapt.
Disclosure of Invention
In order to solve the technical problem of how to reasonably layout the vehicle-mounted antenna and improve the performance of the vehicle-mounted antenna, the application provides a vehicle-mounted antenna unit, a vehicle-mounted antenna system and a vehicle.
In a first aspect, the present application provides a vehicle-mounted antenna unit, including: a first antenna module, a second antenna module, a third antenna module, and a fourth antenna module;
the first antenna module comprises a 2G multi-band antenna, a 3G multi-band antenna and a 4G multi-band antenna;
the second antenna module comprises a 5G multi-band antenna, a WIFI multi-band antenna and a Bluetooth multi-band antenna;
the third antenna module comprises a multi-band positioning antenna;
the fourth antenna module comprises a 6G antenna array;
the first antenna module, the second antenna module, the third antenna module and the fourth antenna module are respectively arranged in different areas of the vehicle-mounted antenna unit.
Optionally, the first antenna module is disposed on a first side of the vehicle-mounted antenna unit; the second antenna module is arranged on the second side edge of the vehicle-mounted antenna unit; the third antenna module is arranged in a corner area where the second side edge and the third side edge of the vehicle-mounted antenna unit are located; the fourth antenna module is arranged in a corner area where the third side edge and the fourth side edge are positioned; the first side edge, the second side edge, the third side edge and the fourth side edge enclose an area where the vehicle-mounted antenna unit is located.
Optionally, the vehicle-mounted antenna unit further comprises a matching circuit and a decoupling circuit;
the matching circuit comprises a first matching module, a second matching module, a third matching module and a fourth matching module;
the decoupling circuit comprises a first decoupling module, a second decoupling module, a third decoupling module and a fourth decoupling module;
the input end of the first matching module is connected with a first radio frequency signal input end, the output end of the first matching module is connected with the input end of the first decoupling module, and the output end of the first decoupling module is connected with the first antenna module;
the input end of the second matching module is connected with a second radio frequency signal input end, the output end of the second matching module is connected with the input end of the second decoupling module, and the output end of the second decoupling module is connected with the second antenna module;
the input end of the third matching module is connected with a third radio frequency signal input end, the output end of the third matching module is connected with the input end of the third decoupling module, and the output end of the third decoupling module is connected with the third antenna module;
the input end of the fourth matching module is connected with a fourth radio frequency signal input end, the output end of the fourth matching module is connected with the input end of the fourth decoupling module, and the output end of the fourth decoupling module is connected with the fourth antenna module.
Optionally, the first antenna module, the second antenna module and the third antenna module are of a low profile type; wherein the low profile type includes at least one of an IFA antenna, a T antenna, and a microstrip patch antenna.
Optionally, the frequency bands of the 6G antenna array include millimeter wave frequency bands, E frequency bands, and terahertz frequency bands.
In a second aspect, the present application provides a vehicle antenna system comprising a plurality of vehicle antenna units according to claims 1-5.
Optionally, the vehicle-mounted antenna system comprises a multi-band positioning antenna;
the multi-band positioning antenna is used as a third antenna module of the vehicle-mounted antenna units.
Optionally, the vehicle-mounted antenna system includes four first antenna modules, four second antenna modules, and four fourth antenna modules;
the four first antenna modules, the four second antenna modules and the four fourth antenna modules form a multi-input multi-output antenna system.
In a third aspect, the present application provides a vehicle comprising the vehicle-mounted antenna unit of any one of the first aspects or comprising the vehicle-mounted antenna system of any one of the second aspects.
Optionally, the in-vehicle antenna unit or the in-vehicle antenna system is disposed on top of the vehicle.
The beneficial effects of this application:
the vehicle-mounted antenna unit provided by the embodiment of the application comprises: a first antenna module, a second antenna module, a third antenna module, and a fourth antenna module; the first antenna module comprises a 2G multi-band antenna, a 3G multi-band antenna and a 4G multi-band antenna; the second antenna module comprises a 5G multi-band antenna, a WIFI multi-band antenna and a Bluetooth multi-band antenna; the third antenna module comprises a multi-band positioning antenna; the fourth antenna module comprises a 6G antenna array; the first antenna module, the second antenna module, the third antenna module and the fourth antenna module are respectively arranged in different areas of the vehicle-mounted antenna unit. According to the vehicle-mounted antenna unit, on the premise that good isolation degree of each antenna is guaranteed and the isolation degree of each antenna is not affected mutually, the antenna modules of different types are arranged in different areas, the antenna modules are reasonably distributed, and the performance of the vehicle-mounted antenna is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a vehicle-mounted antenna unit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a vehicle-mounted antenna unit according to another embodiment of the present application;
fig. 3 is a schematic diagram of radio frequency signal transmission according to an embodiment of the present application;
fig. 4 is a schematic diagram of a vehicle antenna system according to an embodiment of the present application;
fig. 5 is a schematic diagram of installation of an in-vehicle antenna system on a vehicle according to an embodiment of the present application.
Detailed Description
Further advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure in the present specification, by describing embodiments of the present application with reference to the accompanying drawings and preferred examples. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation to the scope of the present application.
With the rapid development of the mobile communication field, 6G is not only a more advanced next generation mobile communication system, but also an connotation of the far-reaching communication field. While automatic driving is the most difficult use case in intelligent traffic, it is commonly used in primary automatic driving for mining, quarrying, construction and agriculture, requiring remote manual driving and remote operation. The L5 level autopilot, as a more advanced use case, will redefine the meaning of driving travel. Route planning and driving are all done by automatic driving cars, and the journey is thus made easier. To cope with unpredictable situations, the perceived and AI capabilities provided by 6G, as well as ultra low latency, high reliability and accurate positioning are indispensable elements. Later automobiles were not only a vehicle, but also a mobile communication and data transmission device, and antennas were redesigned and defined as devices for transmitting and receiving useful radio waves.
The existing vehicle-mounted antennas are distributed and located at different positions of an automobile, the single antenna is single in function, only information such as AM/FM broadcasting, WIFI and BT can be received and transmitted, few antennas for communication and multimedia service are provided, and an antenna system for 6G application scene service is provided, so that the communication requirement of 'everything interconnection' is difficult to adapt.
In order to solve the problem that when the 6G information age comes, how to reasonably layout the vehicle-mounted antenna under the premise of ensuring that the isolation degree of each antenna is good and the antennas are not mutually influenced due to the increase of functions and the number of the vehicle-mounted antenna in the automotive field, the first embodiment of the application provides a vehicle-mounted antenna unit, which at least comprises a first antenna module 101, a second antenna module 102, a third antenna module 103 and a fourth antenna module 104 as shown in fig. 1. The first antenna module, the second antenna module, the third antenna module and the fourth antenna module are respectively arranged in different areas of the vehicle-mounted antenna unit.
Specifically, as shown in fig. 2, the vehicle-mounted antenna unit may include a 2G multi-band antenna, a 3G multi-band antenna, and a 4G multi-band antenna, the second antenna module includes a 5G multi-band antenna, a WIFI multi-band antenna, and a Bluetooth (also referred to as BT) multi-band antenna, the third antenna module includes a multi-band positioning antenna, and the fourth antenna module includes a 6G antenna array. The multi-band positioning antenna can be a satellite positioning antenna such as a GPS, a GNSS, a Beidou and the like, and is not limited.
In this embodiment, the frequency bands of 2G, 3G and 4G are far apart (for example, the frequency bands of GSM900 and lte_b3 are about 900MHz apart), so that the problem that the performance of the antenna module is affected due to the fact that two frequency bands to be used are too close to each other is solved. Similarly, 5G and WIFI and BT are divided into the same module based on the principle (for example, WIFI/BT_2.4GHz and NR_77 differ by about 1 GHz). The 6G antenna array module is placed independently and is based on the reasons that the 6G frequency band is high, the antenna array is small in size and easy to interfere, and secondly, the 6G communication application scene is not driven automatically or is transmitted with communication data, a large amount of information in different directions is always transmitted mutually, and real-time tracking is needed, so that the 6G module is a series of antenna arrays, and beam scanning has tracking capability. In this embodiment, by setting different types of antenna modules in different areas, the antenna modules are reasonably laid out, so that the performance of the vehicle-mounted antenna is improved.
In one embodiment, as shown in fig. 2, the first antenna module is disposed on a first side of the vehicle antenna unit, the second antenna module is disposed on a second side of the vehicle antenna unit, the third antenna module is disposed in a corner area where the second side and the third side of the vehicle antenna unit are located, the fourth antenna module is disposed in a corner area where the third side and the fourth side are located, and the first side, the second side, the third side and the fourth side enclose an area where the vehicle antenna unit is located.
In this embodiment, the first antenna module, the second antenna module, the third antenna module and the fourth antenna module are respectively disposed in different areas of the vehicle-mounted antenna unit, so that the anti-interference capability between different antennas is improved, and the same antenna module is divided into frequency bands with far phase difference according to the common frequency bands, so that the overall performance of the vehicle-mounted antenna is improved.
In one embodiment, the frequency bands of the 6G antenna array include millimeter wave frequency bands, E frequency bands, and terahertz frequency bands.
The E frequency band is 71-76 GHz and 81-86 GHz, a large amount of bandwidths of the millimeter wave band and the terahertz wave band are critical to the scenes such as ultra-high speed required by 6G and L5 automatic driving, and the performance of the antenna unit can be improved by the 6G antenna array comprising the millimeter wave frequency band, the E frequency band and the terahertz frequency band.
In one embodiment, the first antenna module, the second antenna module, and the third antenna module are of a low profile type, wherein the low profile type includes at least one of an IFA (Inverted-F antenna) antenna, a T antenna, and a microstrip patch antenna.
In one embodiment, the in-vehicle antenna unit further comprises a matching circuit and a decoupling circuit. A schematic diagram of the rf signal transmission is shown in figure 3,
the matching circuit comprises a first matching module, a second matching module, a third matching module and a fourth matching module, and the decoupling circuit comprises a first decoupling module, a second decoupling module, a third decoupling module and a fourth decoupling module.
The specific connection relation is as follows: the input end of the first matching module is connected with the first radio frequency signal input end, the output end of the first matching module is connected with the input end of the first decoupling module, the output end of the first decoupling module is connected with the first antenna module, the input end of the second matching module is connected with the second radio frequency signal input end, the output end of the second matching module is connected with the input end of the second decoupling module, the output end of the second decoupling module is connected with the second antenna module, the input end of the third matching module is connected with the third radio frequency signal input end, the output end of the third matching module is connected with the third antenna module, the input end of the fourth matching module is connected with the fourth radio frequency signal input end, the output end of the fourth matching module is connected with the input end of the fourth decoupling module, and the output end of the fourth decoupling module is connected with the fourth antenna module.
In this embodiment, the frequency bands of 2G, 3G and 4G are far apart (for example, the frequency bands of GSM900 and lte_b3 are different by about 900 MHz), which is favorable for the design of the matching circuit module, and thus the distribution overcomes the problem that the matching circuit module is difficult to design and further affects the performance of the antenna module because the two frequency bands of the matching circuit module need to be used are too close to each other. The same WIFI, BT and 5G common frequency bands are far apart (for example, the WIFI/BT_2.4GHz and NR_77 differ by about 1 GHz), so that the design of the matching circuit module is facilitated, and the problem that the matching circuit module is difficult to design and the performance of the antenna module is affected due to the fact that the two common frequency bands to be used are too close to each other is solved. The multiple antenna modules are distributed in a relatively close position, which is easy to cause mutual interference between different antenna modules, so that a decoupling circuit module is additionally designed on the basis that different antenna modules are separated by a certain distance. The 6G antenna array module is placed independently and is based on the reasons that the 6G frequency band is high, the antenna array is small in size and easy to interfere, and secondly, the 6G communication application scene is not driven automatically or is transmitted with communication data, a large amount of information in different directions is always transmitted mutually, and real-time tracking is needed, so that the 6G module is a series of antenna arrays, and beam scanning has tracking capability. The multiple antenna modules are distributed in a relatively close position, which is easy to cause mutual interference between different antenna modules, so that a decoupling circuit module is additionally designed on the basis that different antenna modules are separated by a certain distance.
When signals come out of the RF_IC pin, the signals pass through the radio frequency ends of an amplifier, a filter circuit and the like, then pass through the matching circuit module and the decoupling circuit module, come to the antenna module, and finally are transmitted out through the antenna module. The matching circuit module and the decoupling circuit module are composed of inductance and capacitance components.
In addition, the 6G antenna array module is separately placed and independent of other modules, and the material is a high-frequency material, so that the first reason is that the 6G frequency band is high, the antenna array is small in size and is easily interfered by other antenna modules, and secondly, the application scene of 6G communication is that whether the application scene is automatic driving or communication data transmission, a large amount of information in different directions is mutually transmitted, and therefore, the real-time tracking capability is required.
In this embodiment, the vehicle-mounted antenna unit supports the common commercial mobile communication frequency bands of GSM, WCDMA, LTE 4G, NR G, 6G and the like, and is also applicable to 6G application scenarios of embb+ (enhanced mobile bandwidth), urllc+ (ultra-high reliability ultra-low latency communication), mctc+ (mass machine communication) and the like. Meanwhile, the 6G module has the characteristics of wave speed scanning in the horizontal plane and the pitching plane, and the wave beam scanning is performed in the pitching plane, so that the antenna system can be easily connected with a base station and can be communicated with the base station. Performing beam scanning in the horizontal plane can be used for device-to-device communication with another vehicle or a device such as a cell phone. In this embodiment, after the 6G technology is introduced into the vehicle-mounted system, the 6G antenna array, the first antenna module, the second antenna module and the third antenna module are reasonably laid out, so that the performance of the vehicle-mounted antenna is improved.
Based on the same technical concept, a second embodiment of the present application provides a vehicle-mounted antenna system, which includes a plurality of vehicle-mounted antenna units in the above embodiments.
In one embodiment, as shown in fig. 4, the vehicle antenna system includes a multi-band positioning antenna; the multi-band positioning antenna is used as a third antenna module of the plurality of vehicle-mounted antenna units.
In this embodiment, in the vehicle-mounted antenna system, a multiband positioning antenna may be shared, for example, a third antenna module is distributed in the center, and the communication performance of the third antenna module completely meets the requirement of normal and safe running of the vehicle, and a certain cost may be saved. The center distribution can also enable the upper hemisphere radiation efficiency of the multi-band positioning antenna to be higher.
In one embodiment, the vehicle antenna system includes four first antenna modules, four second antenna modules, and four fourth antenna modules, where the four first antenna modules, the four second antenna modules, and the four fourth antenna modules form a mimo antenna system.
In this embodiment, the vehicle antenna system is composed of the vehicle antenna units of the mimo_trx1 module and the mimo_trx2 module and the vehicle antenna units of the mimo_drx1 and the mimo_drx 2. The mimo_trx1 module and the mimo_trx2 module are diagonally distributed, and the mimo_drx1 module and the mimo_drx2 module are diagonally distributed.
The mimo_trx1 module and the mimo_trx2 module take on the task of main transmission and can also be used for reception. The MIMO_DRA1 module and the MIMO_DRA2 module mainly bear the receiving task, when one MIMO_TRX module or the MIMO_DRA2 module is damaged and a certain signal part is lost, only one MIMO_TRX module or the MIMO_DRA2 module is required to normally transmit and receive, and the normal communication work of the automobile can be borne, so that the antenna layout improves the system stability.
In-vehicle antenna systems allow multiple in-vehicle antenna units to simultaneously transmit and receive multiple signals and to be able to distinguish between signals to and from different spatial orientations. By the techniques of space division multiplexing, space diversity and the like, the system capacity, coverage area and signal to noise ratio are improved under the condition of not increasing occupied bandwidth.
It should be noted that, the embodiment is merely illustrative with the 4×4mimo vehicle antenna system, and the vehicle antenna system may also be configured with 2×2mimo, 6×6mimo, and 8×8mimo, which are not limited.
A third embodiment of the present application provides a vehicle comprising the vehicle-mounted antenna unit of any one of the above embodiments or the vehicle-mounted antenna system of any one of the above embodiments.
Specifically, the in-vehicle antenna unit or the in-vehicle antenna system is provided at the top of the vehicle. Fig. 5 is a schematic diagram of a vehicle-mounted antenna system mounted on a vehicle, which can be designed to be low-profile and miniaturized to replace the existing shark fin type antenna, so that the antenna is attractive in appearance, the upper hemisphere radiation efficiency of the multiband positioning antenna is higher, and the performance of the antenna is improved.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The above embodiments are merely preferred embodiments for the purpose of fully explaining the present application, and the scope of the present application is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present application, and are intended to be within the scope of the present application.
Claims (10)
1. A vehicle antenna unit, the vehicle antenna unit comprising: a first antenna module, a second antenna module, a third antenna module, and a fourth antenna module;
the first antenna module comprises a 2G multi-band antenna, a 3G multi-band antenna and a 4G multi-band antenna;
the second antenna module comprises a 5G multi-band antenna, a WIFI multi-band antenna and a Bluetooth multi-band antenna;
the third antenna module comprises a multi-band positioning antenna;
the fourth antenna module comprises a 6G antenna array;
the first antenna module, the second antenna module, the third antenna module and the fourth antenna module are respectively arranged in different areas of the vehicle-mounted antenna unit.
2. The vehicle antenna unit of claim 1, wherein the first antenna module is disposed on a first side of the vehicle antenna unit; the second antenna module is arranged on the second side edge of the vehicle-mounted antenna unit; the third antenna module is arranged in a corner area where the second side edge and the third side edge of the vehicle-mounted antenna unit are located; the fourth antenna module is arranged in a corner area where the third side edge and the fourth side edge are positioned; the first side edge, the second side edge, the third side edge and the fourth side edge enclose an area where the vehicle-mounted antenna unit is located.
3. The vehicle antenna unit of claim 1, further comprising a matching circuit and a decoupling circuit;
the matching circuit comprises a first matching module, a second matching module, a third matching module and a fourth matching module;
the decoupling circuit comprises a first decoupling module, a second decoupling module, a third decoupling module and a fourth decoupling module;
the input end of the first matching module is connected with a first radio frequency signal input end, the output end of the first matching module is connected with the input end of the first decoupling module, and the output end of the first decoupling module is connected with the first antenna module;
the input end of the second matching module is connected with a second radio frequency signal input end, the output end of the second matching module is connected with the input end of the second decoupling module, and the output end of the second decoupling module is connected with the second antenna module;
the input end of the third matching module is connected with a third radio frequency signal input end, the output end of the third matching module is connected with the input end of the third decoupling module, and the output end of the third decoupling module is connected with the third antenna module;
the input end of the fourth matching module is connected with a fourth radio frequency signal input end, the output end of the fourth matching module is connected with the input end of the fourth decoupling module, and the output end of the fourth decoupling module is connected with the fourth antenna module.
4. The vehicle antenna unit of claim 1, wherein the first antenna module, the second antenna module, and the third antenna module are of a low profile type; wherein the low profile type includes at least one of an IFA antenna, a T antenna, and a microstrip patch antenna.
5. The vehicle antenna unit according to claim 1, wherein the frequency bands of the 6G antenna array include millimeter wave frequency bands, E frequency bands, and terahertz frequency bands.
6. A vehicle antenna system, characterized in that it comprises a plurality of vehicle antenna units according to claims 1-5.
7. The vehicle antenna system of claim 6, wherein said vehicle antenna system comprises a multi-band positioning antenna;
the multi-band positioning antenna is used as a third antenna module of the vehicle-mounted antenna units.
8. The vehicle antenna system of claim 7, wherein the vehicle antenna system comprises four first antenna modules, four second antenna modules, and four fourth antenna modules;
the four first antenna modules, the four second antenna modules and the four fourth antenna modules form a multi-input multi-output antenna system.
9. A vehicle, characterized in that it comprises an in-vehicle antenna unit according to any one of claims 1-5 or comprises an in-vehicle antenna system according to any one of claims 6-8.
10. The vehicle of claim 9, characterized in that the in-vehicle antenna unit or the in-vehicle antenna system is provided on top of the vehicle.
Priority Applications (1)
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CN202410004680.8A CN117613542A (en) | 2024-01-02 | 2024-01-02 | Vehicle-mounted antenna unit, vehicle-mounted antenna system and vehicle |
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CN202410004680.8A CN117613542A (en) | 2024-01-02 | 2024-01-02 | Vehicle-mounted antenna unit, vehicle-mounted antenna system and vehicle |
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CN202410004680.8A Pending CN117613542A (en) | 2024-01-02 | 2024-01-02 | Vehicle-mounted antenna unit, vehicle-mounted antenna system and vehicle |
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