Vehicle antenna device and antenna module thereof

Abstract

This application discloses a vehicle-mounted antenna device and its antenna module, which includes an antenna radiating area, a first contact area, and a second contact area. The antenna radiating area includes a first antenna radiating area and a second antenna radiating area. The first antenna radiating area is configured adjacent to the second antenna radiating area in a first direction, and the first antenna radiating area has a first length along a second direction, while the second antenna radiating area has a second length along the second direction, the second length being less than the first length. The first contact area is disposed along the second direction corresponding to the first antenna radiating area, and the first contact area and the first antenna radiating area are separated by a first distance in the second direction. The second contact area is disposed along the second direction corresponding to the second antenna radiating area, and the second contact area and the second antenna radiating area are separated by a second distance in the second direction.

Description

Technical Field

[0001] This application relates to a vehicle-mounted antenna device and its antenna module, and more particularly to an antenna device and its antenna module for a vehicle-mounted system. Background Technology

[0002] With the continuous development of the intelligent vehicle industry, the demand for wireless communication within vehicles is increasing, such as for watching video streaming or communicating with intelligent electronic devices. Therefore, the requirements for data transmission rate and throughput of wireless communication within vehicles are becoming increasingly higher.

[0003] In existing technologies, most automotive antennas are limited to the frequency bands of Bluetooth and Wi-Fi 5, based on the frequency requirements of existing systems. At the same time, in order to control costs, automotive antennas are mostly designed as PCB (Printed Circuit Board) on-board antennas. However, the environment of such antennas is relatively harsh, and there are few places available for antenna traces, so such antennas have narrow bandwidth and low efficiency.

[0004] In view of this, how to provide an in-vehicle antenna device and antenna module that can be applied to existing Bluetooth and Wi-Fi systems and support ultra-wideband spectrum range to improve overall transmission efficiency is a problem that the industry needs to solve. Summary of the Invention

[0005] This application provides a vehicle-mounted antenna device and its antenna module, which can solve the problems of narrow bandwidth and low efficiency of existing vehicle-mounted antennas.

[0006] To address the aforementioned technical problems, this application provides an antenna module comprising an antenna radiating area, a first contact area, and a second contact area. The antenna radiating area includes a first antenna radiating area and a second antenna radiating area. The first antenna radiating area is configured adjacent to the second antenna radiating area in a first direction, and the first antenna radiating area has a first length along a second direction, while the second antenna radiating area has a second length along the second direction, the second length being less than the first length. The first contact area is disposed along the second direction corresponding to the first antenna radiating area, and the first contact area and the first antenna radiating area are separated by a first distance in the second direction. The second contact area is disposed along the second direction corresponding to the second antenna radiating area, and the second contact area and the second antenna radiating area are separated by a second distance in the second direction.

[0007] Another embodiment of this application provides a vehicle-mounted antenna device, comprising an antenna module, a high-speed connector, and an antenna protection box as described above. The antenna protection box is used to cover the antenna module and expose the high-speed connector.

[0008] Based on the above, the vehicle-mounted antenna device and its antenna module of this application can generate resonant frequencies applicable to existing Bluetooth and Wi-Fi systems in the first antenna radiation area and the second antenna radiation area, and generate ultra-high frequency resonant frequencies in a ground-feed coupling manner, so as to achieve the purpose of being applicable to existing Bluetooth and Wi-Fi systems and supporting ultra-wideband spectrum range, thereby improving the overall transmission efficiency.

[0009] To make the above-mentioned features and advantages of this application more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a perspective view of an embodiment of the vehicle-mounted antenna device of this application.

[0011] Figure 2 This is an exploded view of an embodiment of the vehicle-mounted antenna device of this application.

[0012] Figure 3 This is a schematic diagram of an embodiment of the antenna module of this application.

[0013] Figure 4 This is another schematic diagram of an embodiment of the antenna module of this application.

[0014] Figure 5 This is a schematic diagram of the electrical connection of the detection resistor in this application.

[0015] Figure 6 This is a schematic diagram of the VSWR of the antenna module in this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Please refer to Figure 1 and Figure 2 This is a schematic diagram of an embodiment of the vehicle-mounted antenna device of this application. The vehicle-mounted antenna device 1 includes an antenna protection box 100, a connector 200 and an antenna module 300, wherein the connector 200 is disposed on the antenna module 300 and is in contact with the antenna module 300.

[0018] Furthermore, the antenna protection box 100 includes an upper box body 110 and a lower box body 120.

[0019] The upper box body 110 has an inner surface 111 and an outer surface 112, and is provided with an opening 113 that penetrates the inner surface 111 and the outer surface 112 of the upper box body 110. The upper box body 110 has a plurality of fixing parts 114, and the plurality of fixing parts 114 are disposed on the inner surface 111 of the upper box body 110 and extend from the inner surface 111 of the upper box body 110 in a direction away from the outer surface 112.

[0020] The lower housing 120 has a receiving space 121 formed by its side 123 for accommodating a connector 200 and an antenna module 300 that are connected to each other. The antenna module 300 is disposed facing into the receiving space 121, and the connector 200 is disposed facing towards the upper housing 110. The lower housing 120 also has a plurality of fixing components 122, which are disposed on the side 123 of the lower housing 120 and are disposed corresponding to a plurality of fixing parts 114 of the upper housing 110. The plurality of fixing components 122 are used to engage with the plurality of fixing parts 114, so that the upper housing 110 and the lower housing 120 can be clamped and fixed together. Therefore, the connector 200 and the antenna module 300, which are housed in the accommodating space 121 of the lower housing 120, can be clamped and fixed in the accommodating space 121 by the upper housing 110 and the lower housing 120, and the connector 200 is exposed outside the antenna protection box 100 through the opening 113 of the upper housing 110, thus constituting an embodiment of the vehicle antenna device 1 of this application.

[0021] In one embodiment, the plurality of fixing parts 114 are snap-fit ​​structures, and this application is not limited thereto.

[0022] In one embodiment, the plurality of fixing components 122 are protrusion structures corresponding to the plurality of fixing portions 114, and this application is not limited thereto.

[0023] In one embodiment, the antenna protection box 100 is made of a polycarbonate acrylonitrile butadiene styrene blend (PC+ABS) material, and this application is not limited thereto.

[0024] Please continue to refer to this. Figure 3 and Figure 4 , Figure 3 and Figure 4This is a schematic diagram of an embodiment of the antenna module of this application. The antenna module 300 includes a substrate 310 and an antenna layer formed on the substrate 310. The substrate 310 may define a first long side 311, a second long side 313, a first short side 312, and a second short side 314. The first long side 311 is located on the opposite side of the second long side 313, the first short side 312 is located on the opposite side of the second short side 314, and the first short side 312 is connected to one end of the first long side 311 and the second long side 313, and the second short side 314 is connected to the other end of the first long side 311 and the second long side 313.

[0025] Furthermore, the antenna layer can define an antenna radiation area 320 and a contact area 330. The antenna radiation area 320 includes a first antenna radiation area 321 and a second antenna radiation area 322. The first antenna radiation area 321 is adjacent to and in contact with the second antenna radiation area 322 in the first direction X. Furthermore, the first antenna radiation area 321 is disposed on the substrate 310 and near the first long side 311, and forms an ascending stepped antenna pattern along the second direction Y, and has a first length L1 in the second direction Y. The second antenna radiation area 322 is disposed on the substrate 310 and near the second long side 313, and forms a square antenna pattern along the second direction Y, and has a second length L2 in the second direction Y, wherein the second length L2 is less than the first length L1.

[0026] In this embodiment, the first length L1 is between 54.3 mm and 54.7 mm. In one embodiment, the first length L1 is preferably 54.5 mm.

[0027] In this embodiment, the second length L2 is between 25 mm and 27 mm. In one embodiment, the second length L2 is preferably 26 mm.

[0028] Furthermore, the antenna radiating area 320 may define a trace width W1, which is the traceable length of the first antenna radiating area 321 and the second antenna radiating area 322 on the substrate 310 in the first direction X. In this embodiment, the trace width W1 is the same as the length of the first short side 312. In this embodiment, the trace width W1 is equal to or less than 23 mm and greater than 0 mm. In one embodiment, the trace width W1 is preferably 23 mm.

[0029] Therefore, by maximizing the trace width W1 of the antenna radiating area 320, this application can increase the transmission bandwidth of the antenna module 300, thereby supporting the ultra-wideband spectrum range and improving overall transmission efficiency. Thus, this application can generate a resonant frequency of 2.4-2.5 GHz through the first antenna radiating area 321 and a resonant frequency of 5.150-5.850 GHz through the second antenna radiating area 322. Simultaneously, the antenna radiating area 320 of this application has a large radiating area, forming a high-gain single-stage omnidirectional antenna structure, further ensuring that the system's communication requirements can be met even in harsh communication environments.

[0030] Furthermore, the grounding region 330 can define a first grounding region 331 and a second grounding region 332. The first grounding region 331 is disposed on the substrate 310 and near the first long side 311, forming a square pattern along the second direction Y. The first grounding region 331 is also disposed along the second direction Y corresponding to the first antenna radiating region 321, and the first grounding region 331 and the first antenna radiating region 321 are separated by a first distance D1 in the second direction Y. The second grounding region 332 is disposed on the substrate 310 and near the second long side 313, forming a hexagonal pattern along the second direction Y. The second grounding region 332 is also disposed along the second direction Y corresponding to the second antenna radiating region 322, and the second grounding region 332 and the second antenna radiating region 322 are separated by a second distance D2 in the second direction Y. Therefore, the antenna module 300 of this embodiment can generate an ultra-high frequency resonant frequency of 6 GHz or higher through a ground-feed coupling method, thereby supporting an ultra-wideband spectrum range and improving overall transmission efficiency. Furthermore, the feed coupling effect between the first antenna radiation area 321 and the second antenna radiation area 322 and the first grounding area 331 and the second grounding area 332 can be controlled by adjusting the first distance D1 and the second distance D2.

[0031] In one embodiment, the second contact area 332 is a square pattern, but this application is not limited thereto.

[0032] In this embodiment, the first distance D1 is between 1.5 mm and 2.5 mm. In one embodiment, the first distance D1 is preferably 2 mm.

[0033] In this embodiment, the second distance D2 is between 2 mm and 3 mm. In one embodiment, the second distance D2 is preferably 2.5 mm.

[0034] In one embodiment, the antenna radiating area 320 and the grounding area 330 are formed on the substrate 310 by etching. Therefore, the antenna module 300 of this application has a simple structure and does not require a large number of components. It can be fixed to the antenna protection box 100 by clamping, so that the structure of the vehicle antenna device 1 is compact and fits well, so as to adapt to the high temperature, high humidity and vibration working environment of vehicle specifications.

[0035] Furthermore, the first antenna radiating region 321 may define a feed region 3211, which extends along the second direction Y to the area between the first contact region 331 and the second contact region 332. Furthermore, the antenna module 300 further includes a first through-hole 340 and a plurality of second through-holes 350. The first through-hole 340 is disposed on the substrate 310 near the second short side 314 and is in contact with the feed region 3211 of the first antenna radiating region 321. The plurality of second through-holes 350 are disposed around the first through-hole 340 on the substrate 310 near the second short side 314 and are in contact with either the first contact region 331 or the second contact region 332. In this embodiment, two second through-holes 350 are in contact with the first contact region 331, and the other two second through-holes 350 are in contact with the second contact region 332.

[0036] In this embodiment, connector 200 is disposed on the side of substrate 310 away from the antenna layer. Its pins are in contact with the first through-hole 340 and a plurality of second through-holes 350, so that connector 200 is electrically connected to the feed area 3211, the first grounding area 331 and the second grounding area 332 of the first antenna radiation area 321 through its pins. Therefore, the antenna radiation signal can be fed into the antenna radiation area 320 through the contacted connector 200 and the first through-hole 340, and the first grounding area 331 and the second grounding area 332 are grounded to the grounding terminal of the terminal system through the contacted connector 200.

[0037] Furthermore, the antenna module 300 further includes a first variable capacitor C1 and a second variable capacitor C2. The first variable capacitor C1 is disposed in the first direction X between the first antenna radiating region 321 and the first grounding region 331, with its first end connected to the feed area 3211 of the first antenna radiating region 321 and its other end connected to the first grounding region 331. The second variable capacitor C2 is disposed in the first direction X between the first antenna radiating region 321 and the second grounding region 332, with one end connected to the feed area 3211 of the first antenna radiating region 321 and its other end connected to the second grounding region 332. Therefore, the antenna module 300 of this application can maintain its input impedance at 50 ohms by selecting the capacitance values ​​of the first variable capacitor C1 and the second variable capacitor C2 to achieve the best matching effect with the terminal system.

[0038] Furthermore, the antenna module 300 further includes a detection resistor R, which is disposed in the first direction X between the first antenna radiation area 321 and the first grounding area 331. One end of the R is in contact with the feed area 3211 of the first antenna radiation area 321, and the other end is in contact with the first grounding area 331.

[0039] Please refer to further information. Figure 5 , Figure 5 This is a schematic diagram illustrating the electrical connection between the detection resistor R and the terminal system and antenna module 300 according to an embodiment of this application. With the aforementioned configuration, one end of the detection resistor R is electrically connected to the terminal system 400 and the antenna module 300, while the other end of the detection resistor R is grounded. When the antenna module 300 is open-circuited, the voltage across the detection resistor R is the voltage value at the output terminal of the terminal system 400; when the antenna module 300 is short-circuited, the voltage across the detection resistor R is zero due to the short circuit; when the antenna module 300 is operating normally, the voltage across the detection resistor R is a predetermined voltage value, and this predetermined voltage value is less than the voltage value output by the terminal system 400. Therefore, by measuring the voltage across the detection resistor R, the state of the antenna module 300 (short circuit, open circuit, or normal operation) can be quickly confirmed, improving the convenience of detecting the antenna module 300.

[0040] Please refer to Figure 6 , Figure 6 The figures illustrate the standing wave ratio (SWR) performance of the antenna module embodiments of this application at different frequencies, where G1 represents the SWR value of the antenna module embodiment at 2.400 GHz, G2 represents the SWR value of the antenna module embodiment at 2.480 GHz, G3 represents the SWR value of the antenna module embodiment at 5.150 GHz, G4 represents the SWR value of the antenna module embodiment at 5.850 GHz, G5 represents the SWR value of the antenna module embodiment at 5.925 GHz, and G6 represents the SWR value of the antenna module embodiment at 7.125 GHz. Figure 6 As can be seen from this, the antenna module of this application (e.g.) Figure 3 The embodiments described above maintain a VSWR value of less than 2 in different frequency bands, meaning that the antenna module embodiments of this application have excellent matching effect with the terminal system.

[0041] In summary, the vehicle-mounted antenna device and its antenna module proposed in this application, through their antenna pattern and grounding coupling method, not only generate resonant frequencies applicable to existing Bluetooth and Wi-Fi systems, but also support resonant frequencies in the ultra-wideband spectrum range, thereby achieving the goal of supporting the ultra-wideband spectrum range and improving overall transmission efficiency. Furthermore, the antenna module of this application has a simple structure, requiring no large number of components, and can therefore be fixed to the antenna protection box by a clamping method, making the structure of the vehicle-mounted antenna device compact and fitting, and adaptable to the working environment of vehicle specifications.

[0042] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0043] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. An antenna module, characterized by Include: The antenna radiation area includes a first antenna radiation area and a second antenna radiation area. The first antenna radiation area is arranged adjacent to the second antenna radiation area in a first direction, and the first antenna radiation area has a first length along a second direction, and the second antenna radiation area has a second length along the second direction, the second length being less than the first length. A first contact area is provided along the second direction corresponding to the first antenna radiation area, and the first contact area and the first antenna radiation area are separated by a first distance in the second direction; as well as The second contact area is disposed along the second direction corresponding to the second antenna radiation area, and the second contact area and the second antenna radiation area are separated by a second distance in the second direction; The first antenna radiation region includes a feed area, which extends along the second direction to the area between the first contact area and the second contact area. The feed area is adjacent to the first contact area and the second contact area in the first direction.

2. The antenna module of claim 1, wherein, The first length is 54.3 mm to 54.7 mm.

3. The antenna module of claim 1, wherein, The second length is 25 mm to 27 mm.

4. The antenna module of claim 1, wherein, The first distance is 1.5 mm to 2.5 mm.

5. The antenna module of claim 1, wherein, The second distance is 2 to 3 millimeters.

6. The antenna module of claim 1, wherein, The trace width of the antenna radiation area is equal to or less than 23 mm.

7. The antenna module of claim 1, wherein, The first antenna radiation area has an ascending stepped pattern.

8. The antenna module of claim 1, wherein, include: The detection resistor is disposed in the first direction between the first antenna radiation area and the first grounding area, and is in contact with the first antenna radiation area and the first grounding area.

9. The antenna module of claim 1, wherein, include: A first variable capacitor is disposed in the first direction between the first antenna radiation area and the first grounding area, and is in contact with the first antenna radiation area and the first grounding area. and The second variable capacitor is disposed in the first direction between the first antenna radiation area and the second grounding area, and is in contact with the first antenna radiation area and the second grounding area.

10. A vehicle antenna device, characterized by comprising: Include; The antenna module as described in claim 1; A high-speed connector is used to make contact with the antenna module. as well as Antenna protection box, used to cover the antenna module and expose the high-speed connector.

11. The antenna-in-a-wheel cover apparatus of claim 10, wherein, The antenna protection box includes an upper box and a lower box, which enclose the antenna module to fix the antenna module in the antenna protection box.

12. The antenna-in-a-wheel cover apparatus of claim 10, wherein, The antenna protection box is made of a mixture of polycarbonate, acrylonitrile, butadiene, and styrene.

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