Vehicle-mounted antenna, its preparation method, and vehicle-mounted electronic device

Abstract

The present disclosure provides a vehicle-mounted antenna, a preparation method thereof, and a vehicle-mounted electronic device, belonging to the technical field of vehicle-mounted communication, which can solve the problem of poor radiation performance of existing vehicle-mounted antennas. The vehicle-mounted antenna of the present disclosure includes: a first substrate and a second substrate arranged opposite to each other, a feeding trace layer located on one side of the first substrate close to the second substrate, and a radiation coupling layer located on one side of the second substrate close to the first substrate; wherein, the feeding trace layer includes: at least one feeding trace; the radiation coupling layer is provided with an opening; at least a part of the orthographic projection of at least one feeding trace on the first substrate overlaps with the orthographic projection of the opening on the first substrate.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of vehicle-mounted communication, and particularly relates to a vehicle-mounted antenna, a preparation method thereof, and a vehicle-mounted electronic device. Background Art

[0002] With the increasing intelligence of current vehicles, the types of requirements for vehicle-mounted antennas are growing. In addition to traditional electronic devices such as radios and navigation systems, the demands for multi-frequency communication, tire pressure monitoring, remote data processing, etc. in the vehicle networking era will gradually expand the requirements for vehicle-mounted antennas.

[0003] Based on the development of vehicle networking, the wireless connection and positioning technologies integrated in vehicles will increase day by day, including AM / FM, Wi-Fi, Bluetooth, 3G / LTE cellular, 5G, GNSS positioning, etc. With the support of 5G technology, traditional vehicle-mounted antennas can no longer meet the requirements of users for vehicle-mounted antennas in the vehicle networking era. How to improve the radiation performance of vehicle-mounted antennas has become an urgent problem to be solved. Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and provides a vehicle-mounted antenna, a preparation method thereof, and a vehicle-mounted electronic device.

[0005] In a first aspect, an embodiment of the present disclosure provides a vehicle-mounted antenna, which includes: a first substrate and a second substrate arranged oppositely, a feed trace layer located on one side of the first substrate close to the second substrate, and a radiation coupling layer located on one side of the second substrate close to the first substrate; wherein, the feed trace layer includes: at least one feed trace; an opening is provided in the radiation coupling layer;

[0006] The orthographic projection of at least one of the feed traces on the first substrate and the orthographic projection of the opening on the first substrate at least partially overlap.

[0007] Optionally, the extending direction of the feed trace intersects with the length extending direction of the opening.

[0008] Optionally, the radiation coupling layer is composed of a plurality of first metal lines arranged crosswise.

[0009] Optionally, at least one of the feed traces is composed of a plurality of second metal lines arranged crosswise.

[0010] Optionally, the line width of the first metal line is 2 micrometers to 30 micrometers; the distance between adjacent first metal lines is 50 micrometers to 200 micrometers; the thickness of the first metal line is 1 micrometer to 10 micrometers;

[0011] The line width of the second metal line is 2 to 30 microns; the distance between adjacent second metal lines is 50 to 200 microns; the thickness of the second metal line is 1 to 10 microns.

[0012] Optionally, multiple first metal lines arranged in a cross pattern form a first hollow structure, and multiple second metal lines arranged in a cross pattern form a second hollow structure;

[0013] The orthographic projection of the first hollow structure on the first substrate coincides with the orthographic projection of the second hollow structure on the first substrate.

[0014] Optionally, the shape of the opening is U-shaped, linear, or annular.

[0015] Optionally, the vehicle-mounted antenna is mounted on an automotive glass; the automotive glass includes: a first glass and a second glass arranged opposite to each other, and an adhesive layer located between the first glass and the second glass; the first glass serves as the first substrate, and the second glass serves as the second substrate.

[0016] Optionally, the vehicle-mounted antenna further includes: a ground layer; the automotive body serves as the ground layer.

[0017] In a second aspect, an embodiment of the present disclosure provides a vehicle-mounted electronic device, and the vehicle-mounted electronic device includes the vehicle-mounted antenna as described above.

[0018] In a third aspect, an embodiment of the present disclosure provides a method for manufacturing a vehicle-mounted antenna, and the method for manufacturing the vehicle-mounted antenna includes:

[0019] Forming a feed trace layer on a first substrate; the feed trace layer includes: at least one feed trace;

[0020] Forming a radiation coupling layer on a second substrate; the radiation coupling layer is provided with an opening;

[0021] Relatively attaching the first substrate having the feed trace layer formed thereon and the second substrate having the radiation coupling layer formed thereon, such that the orthographic projection of at least one feed trace on the first substrate and the orthographic projection of the opening on the first substrate at least partially overlap.

[0022] Optionally, the forming the radiation coupling layer on the second substrate includes:

[0023] Forming a first metal layer on the second substrate;

[0024] Using a photolithography process to process the first metal layer to form multiple first metal lines arranged in a cross pattern.

[0025] Optionally, the forming the radiation coupling layer on the second substrate includes:

[0026] Form a first metal layer on a second substrate;

[0027] Use an imprinting process to process the first metal layer to form a plurality of first metal lines arranged crosswise. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of an exemplary vehicle-mounted antenna;

[0029] Figure 2 It is Figure 1 A schematic cross-sectional structural diagram of the vehicle-mounted antenna shown along the A-A' direction;

[0030] Figure 3 It is Figure 1 The vertical / horizontal polarization pattern of the vehicle-mounted antenna shown in the horizontal direction;

[0031] Figure 4 It is Figure 1 A schematic diagram of the return loss of the vehicle-mounted antenna shown;

[0032] Figure 5 It is a schematic structural diagram of a vehicle-mounted antenna provided by an embodiment of the present disclosure;

[0033] Figure 6 It is Figure 5 A schematic cross-sectional structural diagram of the vehicle-mounted antenna shown along the B-B' direction;

[0034] Figure 7 It is the vertical / horizontal polarization pattern of the vehicle-mounted antenna in the horizontal direction provided by an embodiment of the present disclosure;

[0035] Figure 8 It is a schematic diagram of the return loss of the vehicle-mounted antenna provided by an embodiment of the present disclosure;

[0036] Figure 9 It is a schematic structural diagram of a radiation coupling layer in a vehicle-mounted antenna provided by an embodiment of the present disclosure;

[0037] Figure 10 It is a schematic structural diagram of a feed line in a vehicle-mounted antenna provided by an embodiment of the present disclosure;

[0038] Figure 11 It is a schematic flow diagram of a method for manufacturing a vehicle-mounted antenna provided by an embodiment of the present disclosure. Detailed Description of the Embodiment

[0039] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be further described in detail below in conjunction with the drawings and specific embodiments.

[0040] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which this disclosure pertains. The terms "first", "second" and similar terms used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Words such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] Figure 1 It is a schematic structural diagram of an exemplary vehicle-mounted antenna. Figure 2 is Figure 1 a schematic cross-sectional structural diagram of the vehicle-mounted antenna shown in the direction of A-A', as Figure 1 and Figure 2 shown, the vehicle-mounted antenna is installed on the automotive glass, and the automotive glass includes: a first glass 101 and a second glass 102 which are oppositely arranged, and an adhesive layer 103 located between the first glass 101 and the second glass 102; the vehicle-mounted antenna includes: a feed line layer 201; the feed line layer 201 is located on the side of the first glass 101 close to the second glass 102; wherein, the feed line layer 201 includes: a plurality of feed lines 2011.

[0042] Automotive glass generally adopts a double-layer structure, and the first glass 101 and the second glass 102 are bonded together through the adhesive layer 103. Specifically, the adhesive layer 103 can be a polyvinyl butyral (PVB) glue layer. The double-layer structure of the automotive glass can ensure that the vehicle has good heat insulation and noise reduction performance, and the PVB glue layer can effectively bond the first glass 101 and the second glass 102, while increasing the strength, heat insulation and noise reduction performance of the automotive glass.

[0043] The feed line layer 201 can be formed by a plurality of parallel feed lines 2011, and is disposed on the side of the first glass 101 close to the second glass 102. Specifically, the feed line 2011 is generally made of copper wire with good electrical conductivity. Since the automobile body itself is a metal conductive material, it can be used as the ground layer of the vehicle-mounted antenna. The feed line layer 201 is coupled with the automobile body to form an electromagnetic signal loop, so as to convert an electrical signal into an electromagnetic wave signal and radiate the signal externally, or convert the electromagnetic wave signal into an electrical signal to receive the externally transmitted signal.

[0044] Currently, the vehicle-mounted antenna can be hidden inside the automobile glass to ensure the radiation effect of the vehicle-mounted antenna and achieve the effect of hiding and beautifying. However, the antenna gain of the existing vehicle-mounted antenna in the horizontal direction cannot achieve good results, and it cannot achieve good radiation effects on electromagnetic waves of certain specific frequencies. For example, Figure 3 For Figure 1 the vertical / horizontal polarization pattern of the vehicle-mounted antenna in the horizontal direction as shown in Figure 3 shown, the vertical polarization effect of the vehicle-mounted antenna in the horizontal direction is poor. Another example is Figure 4 For Figure 1 the schematic diagram of the return loss of the vehicle-mounted antenna as shown in Figure 4 shown, the return loss of the vehicle-mounted antenna is about -1.85 decibels (dB), the return loss is low, and the radiation performance is poor.

[0045] In order to solve at least one of the above technical problems, the embodiments of the present disclosure provide a vehicle-mounted antenna, a preparation method thereof, and a vehicle-mounted electronic device. The vehicle-mounted antenna, the preparation method thereof, and the vehicle-mounted electronic device provided by the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] The embodiments of the present disclosure provide a vehicle-mounted antenna. Figure 5 This is a schematic structural diagram of a vehicle-mounted antenna provided by an embodiment of the present disclosure. Figure 6 For Figure 5 the cross-sectional structural diagram of the vehicle-mounted antenna along the B-B' direction as shown in Figure 5 and Figure 6 shown, the vehicle-mounted antenna includes: a first substrate 301 and a second substrate 302 disposed opposite to each other, a feed line layer 201 located on the side of the first substrate 301 close to the second substrate 302, and a radiation coupling layer 202 located on the side of the second substrate 302 close to the first substrate 301; wherein, the feed line layer 201 includes: at least one feed line 2011; the radiation coupling layer 202 is provided with an opening 2020; at least a part of the orthographic projection of at least one feed line 2011 on the first substrate 301 overlaps with at least a part of the orthographic projection of the opening 2020 on the first substrate 301.

[0047] The feed line layer 201 can be formed by one feed line 2011 or multiple parallel feed lines 2011. In the embodiments of the present disclosure, the main function of the feed line 2011 is not to radiate signals outward. Its quantity can be set according to actual needs, and it is not necessary to increase the quantity of the feed lines 2011 to improve the radiation performance of the vehicle-mounted antenna. For example, it is not necessary to set a large number of feed lines 2011 as in the vehicle-mounted antenna shown in Figure 1 and Figure 2 to save the manufacturing cost. Of course, multiple feed lines 2011 as shown in Figure 1 and Figure 2 can also be used as the feed line layer 201, so that the structure of the feed line layer 201 in the original vehicle-mounted antenna does not need to be changed, reducing the design cost. The feed line 2011 can be made of a metal material with good electrical conductivity, such as copper, aluminum, molybdenum and other metal materials, or made of a metal oxide with good electrical conductivity, such as indium tin oxide, indium gallium zinc oxide and other metal oxides.

[0048] The radiation coupling layer 202 can be made of a metal material or a metal oxide with good electrical conductivity, and its material can be the same as that of the feed line 2011, which will not be listed one by one here. The radiation coupling layer 202 is disposed opposite to the feed line 2011 in the feed line layer 201, and a certain box thickness is provided therebetween to prevent short circuit between the feed line 2011 and the radiation coupling layer 202. At the same time, the radiation coupling layer 202 is provided with an opening 2020, and the number of the openings 2020 can be one or multiple. In the embodiments of the present disclosure, the case where the number of the openings 2020 is one is taken as an example for description. Among them, the orthographic projection of the feed line 2011 on the first substrate 301 and the orthographic projection of the opening 2020 on the first substrate 301 at least partially overlap, and the feed line 2011 and the radiation coupling layer 202 can be coupled to each other to form a new resonant structure, and a slot-coupled antenna can be formed between it and the vehicle body.

[0049] In the vehicle-mounted antenna provided by the embodiments of the present disclosure, the feed line 2011 and the radiation coupling layer 202 can be coupled to each other to form a new resonant structure, and a slot-coupled antenna can be formed between it and the vehicle body. Compared with the traditional vehicle-mounted antenna shown in Figure 1 and Figure 2 , the structure of the vehicle-mounted antenna provided by the embodiments of the present disclosure can change the radiation performance of the electromagnetic signal in the horizontal direction in certain frequency bands to improve the gain of the vehicle-mounted antenna in the horizontal direction (the horizontal direction vertical / horizontal plan view is as shown in Figure 7 ), and at the same time, the return loss of the vehicle-mounted antenna can be improved, so that the return loss can be increased from the original -1.85 dB to about -2.50 dB (the schematic diagram of the return loss is as shown in Figure 8As shown, the overall radiation performance of the vehicle-mounted antenna can be greatly improved.

[0050] In some embodiments, as Figure 5 and Figure 6 shown, the extending direction of the feeding trace 2011 intersects with the length extending direction of the opening 2020.

[0051] The opening 2020 in the radiation coupling layer 202 is a gap penetrating itself and extends along a certain direction, and the extending direction thereof is the length extending direction of the opening 2011. The extending direction of the feeding trace 2011 intersects with the length direction of the opening 2020, and coupling is formed at the position of the opening 2011 between the feeding trace 2011 and the radiation coupling layer 202, which is beneficial to signal radiation. Preferably, the extending direction of the feeding trace 2011 is perpendicular to the length direction of the opening 2020, which can further improve the coupling effect between the feeding trace 2011 and the radiation coupling layer 202, and thus further enhance the radiation effect of the vehicle-mounted antenna.

[0052] Figure 9 The structural schematic diagram of the radiation coupling layer in the vehicle-mounted antenna provided by the embodiment of the present disclosure, as Figure 9 shown, the radiation coupling layer 202 can be composed of a plurality of first metal lines 2021 arranged crosswise.

[0053] The first metal line 2021 can be made of a metal material with good conductivity, for example, metal materials such as copper, aluminum, and molybdenum. The plurality of first metal lines 2021 are arranged crosswise, which can form relatively large gaps. The relatively large gaps can have a good light transmission effect, can avoid blocking light while ensuring good conductivity, and furthermore, since the line width of the first metal line 2021 is small, a transparent effect can be achieved. In this way, it can be ensured that the vehicle-mounted antenna is better integrated into the automotive glass, the transparent effect of the automotive glass is ensured, and the influence of the vehicle-mounted antenna on the light transmission performance of the automotive glass is avoided. It can be understood that the included angle between the crosswise arranged first metal lines 2021 can be 90 degrees or other angles, which can be set according to actual needs.

[0054] Figure 10 The structural schematic diagram of the feeding trace in the vehicle-mounted antenna provided by the embodiment of the present disclosure, as Figure 10 shown, at least one feeding trace 2011 is composed of a plurality of second metal lines 2012 arranged crosswise.

[0055] The second metal wire 2012 can be made of a metal material with good electrical conductivity. For example, metal materials such as copper, aluminum, and molybdenum. Multiple second metal wires 2012 are arranged in a cross pattern, which can form relatively large gaps. These relatively large gaps can achieve a good light transmission effect, avoiding blocking light while ensuring good electrical conductivity. Moreover, since the line width of the second metal wire 2012 is relatively small, a transparent effect can be achieved. In this way, it can ensure that the vehicle-mounted antenna is better integrated into the automotive glass, ensuring the transparent effect of the automotive glass and avoiding the influence of the vehicle-mounted antenna on the light transmission performance of the automotive glass. It can be understood that the angle between multiple cross-arranged second metal wires 2012 can be 90 degrees or other angles, which can be set according to actual needs.

[0056] In some embodiments, the line width of the first metal wire 2021 is 2 to 30 micrometers; the distance between adjacent first metal wires 2021 is 50 to 200 micrometers; the thickness of the first metal wire 2021 is 1 to 10 micrometers; the line width of the second metal wire 2012 is 2 to 30 micrometers; the distance between adjacent second metal wires 2012 is 50 to 200 micrometers; the thickness of the second metal wire 2012 is 1 to 10 micrometers.

[0057] The dimensions of the first metal wire 2021, namely the line width, the distance between adjacent first metal wires 2021, and the thickness of the first metal wire 2021, are all at the micrometer level. And the distance between adjacent first metal wires 2021 is much larger than the line width of the first metal wire 2021, making the gaps between multiple cross-arranged first metal wires 2021 large enough to avoid blocking light by the first metal wire 2021, so as to ensure that the radiation coupling layer 202 formed by the first metal wire 2021 has good light transmission performance. In this way, it can ensure that the vehicle-mounted antenna is better integrated into the automotive glass, ensuring the transparent effect of the automotive glass and avoiding the influence of the vehicle-mounted antenna on the light transmission performance of the automotive glass.

[0058] The dimensions of the second metal wire 2012, namely the line width, the distance between adjacent second metal wires 2012, and the thickness of the second metal wire 2012, are all at the micrometer level. And the distance between adjacent second metal wires 2012 is much larger than the line width of the second metal wire 2012, making the gaps between multiple cross-arranged second metal wires 2012 large enough to avoid blocking light by the second metal wire 2012, so as to ensure that the feed line 201 formed by the second metal wire 2012 has good light transmission performance. In this way, it can ensure that the vehicle-mounted antenna is better integrated into the automotive glass, ensuring the transparent effect of the automotive glass and avoiding the influence of the vehicle-mounted antenna on the light transmission performance of the automotive glass.

[0059] In some embodiments, multiple first metal lines 2021 arranged in a cross pattern form a first hollow structure, and multiple second metal lines 2012 arranged in a cross pattern form a second hollow structure; the orthographic projection of the first hollow structure on the first substrate 301 coincides with the orthographic projection of the second hollow structure on the first substrate 301.

[0060] In practical applications, the dimensions of the first metal lines 2021 and the second metal lines 2012 can be equal. For example, the line width of the metal lines, the distance between adjacent metal lines, etc. During the manufacturing process, it can be ensured that the orthographic projection of the first hollow structure formed by the multiple first metal lines 2021 on the first substrate 301 coincides with the orthographic projection of the second hollow structure formed by the second metal lines 2012 on the first substrate 301, thereby avoiding the occlusion of light by the intersection of the first metal lines 2021 and the second metal lines 2012. Furthermore, it can ensure that the vehicle-mounted antenna as a whole has good light transmission performance. In this way, it can ensure that the vehicle-mounted antenna is better integrated into the automotive glass, ensuring the transparent effect of the automotive glass and avoiding the influence of the vehicle-mounted antenna on the light transmission performance of the automotive glass.

[0061] In some embodiments, the shape of the opening 2020 is U-shaped, linear, or annular.

[0062] The opening 2020 in the radiation coupling layer 202 can be set as Figure 5 shown in the U-shaped form, ensuring that the opening 2022 is at least partially disposed opposite to the feeding trace 2011, enabling coupling between the radiation coupling layer 202 and the feeding trace 2011 to change the radiation performance of the electromagnetic signal in the horizontal direction at certain frequency bands, thereby increasing the gain of the vehicle-mounted antenna in the horizontal direction. At the same time, it can improve the return loss of the vehicle-mounted antenna, thus greatly improving the overall radiation performance of the vehicle-mounted antenna. Of course, the shape of the opening 2020 can also be other shapes such as linear or annular, and its implementation principle is similar to the above-mentioned implementation principle and will not be elaborated here.

[0063] In some embodiments, as Figure 5 and Figure 6 shown, the vehicle-mounted antenna is installed on the automotive glass; the automotive glass includes: a first glass 101 and a second glass 102 disposed opposite to each other, and an adhesive layer 103 located between the first glass 101 and the second glass 102; the first glass 101 serves as the first substrate 301, and the second glass 102 serves as the second substrate 302.

[0064] The feeding trace layer 201 of the vehicle-mounted antenna can be directly attached to the side of the first glass 101 of the automotive glass close to the second glass 102, and the radiation coupling layer 202 can be directly attached to the side of the second glass 102 close to the first glass 101, facilitating the integration of the vehicle-mounted antenna with the automotive glass, improving the aesthetic degree of the vehicle-mounted antenna, and at the same time avoiding the occlusion of light by the vehicle-mounted antenna.

[0065] In some embodiments, the vehicle-mounted antenna further includes: a ground layer (not shown in the figure); the vehicle body is used as the ground layer.

[0066] In practical applications, the vehicle-mounted antenna is further provided with a ground layer to form an electromagnetic loop between the feeding trace 2011 and the radiation coupling layer 202, so as to convert an electrical signal into an electromagnetic wave signal and radiate the signal externally, or convert the electromagnetic wave signal into an electrical signal to receive the externally transmitted signal. In the embodiments of the present disclosure, the vehicle body is reused as the ground layer. The vehicle body itself is a conductive material, and the vehicle body can form an electromagnetic loop with the feeding trace 2011 and the radiation coupling layer 202. In the embodiments of the present disclosure, the structure of the vehicle body is not modified to save the manufacturing cost.

[0067] The embodiments of the present disclosure further provide a vehicle-mounted electronic device, which may include the vehicle-mounted antenna provided in any of the above embodiments. The vehicle-mounted electronic device may be a vehicle-mounted driving recorder, a vehicle-mounted navigation device, a vehicle-mounted central control device, etc. The implementation principle is similar to that of the vehicle-mounted antenna provided in any of the above embodiments, and the beneficial effects are similar, so details are not described herein again.

[0068] The embodiments of the present disclosure further provide a method for manufacturing a vehicle-mounted antenna. Figure 11 As shown in Figure 11 the flowchart of the method for manufacturing a vehicle-mounted antenna provided in the embodiments of the present disclosure, the method for manufacturing the vehicle-mounted antenna includes the following steps:

[0069] S101, forming a feeding trace layer on a first substrate; the feeding trace layer includes: at least one feeding trace.

[0070] In the above step S101, an electrical signal can be transmitted through the feeding trace in the vehicle-mounted antenna to realize the functions of limited radiation and reception. The feeding trace can be made of a metal material with good electrical conductivity, such as copper, aluminum, molybdenum and other metal materials.

[0071] S102, forming a radiation coupling layer on a second substrate; the radiation coupling layer is provided with an opening.

[0072] In the above step S102, the radiation coupling layer is provided with an opening. On the one hand, it can avoid shielding the electrical signal transmitted by the feeding trace. On the other hand, the feeding trace can form a coupling with the radiation coupling layer at the position of the opening, so that the feeding trace and the radiation coupling layer can be coupled with each other to form a new resonant structure, thereby changing the radiation performance of the electromagnetic signal in the horizontal direction in certain frequency bands, improving the gain of the vehicle-mounted antenna in the horizontal direction, and at the same time improving the return loss of the vehicle-mounted antenna, and further improving the overall radiation performance of the vehicle-mounted antenna.

[0073] S103. Oppositely bond the first substrate formed with a feed trace layer and the second substrate formed with a radiation coupling layer together such that the positive projection of at least one feed trace on the first substrate and the positive projection of the opening on the first substrate overlap at least partially.

[0074] In the above step S103, a PVB adhesive layer can be used as the bonding layer. The first substrate formed with a feed trace layer and the second substrate formed with a radiation coupling layer are oppositely bonded together. The first substrate can be the first glass of an automotive glass, and the second substrate can be the second glass of the automotive glass to form a double-layer automotive glass, thereby enhancing the strength, heat insulation, and noise reduction performance of the automotive glass.

[0075] In some embodiments, the above step S102 of forming a radiation coupling layer on the second substrate includes: forming a first metal layer on the second substrate; and then, using a photolithography process to process the first metal layer to form multiple first metal lines arranged crosswise.

[0076] In practical applications, the first metal lines can be fabricated on the surface of the transparent second substrate using a photolithography process. The second metal lines can be made of pure metal, which has a high conductivity, can carry a large amount of power, has a good heat dissipation effect, and can withstand related processes such as welding without being damaged by these processes.

[0077] In some embodiments, the above step S102 of forming a radiation coupling layer on the second substrate includes: forming a first metal layer on the second substrate; and then, using an imprinting process to process the first metal layer to form multiple first metal lines arranged crosswise.

[0078] In practical applications, the imprinting process can be used to fabricate the first metal lines inside the transparent second substrate. The second metal lines can be made of a metal mixture, which can reduce the preparation cost while meeting the relatively good conductivity of the first metal lines.

[0079] It can be understood that the second metal lines can also be fabricated using the same process as the above-mentioned first metal lines, and details are not described herein again.

[0080] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present disclosure. However, the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered within the protection scope of the present disclosure.

Claims

1. A vehicle-mounted antenna, characterized in that, the vehicle-mounted antenna includes: a first substrate and a second substrate arranged oppositely, a feed trace layer located on one side of the first substrate close to the second substrate, and a radiation coupling layer located on one side of the second substrate close to the first substrate; wherein, the feed trace layer includes: at least one feed trace; the radiation coupling layer is provided with an opening; at least a part of the orthographic projection of at least one feed trace on the first substrate overlaps with at least a part of the orthographic projection of the opening on the first substrate; the radiation coupling layer is composed of a plurality of first metal lines arranged crosswise; the opening is formed by disconnecting a part of the first metal lines, and the width of the opening is smaller than the width of the feed trace.

2. The vehicle-mounted antenna according to claim 1, characterized in that, the extending direction of the feed trace intersects with the length extending direction of the opening.

3. The vehicle-mounted antenna according to claim 1, characterized in that, at least one feed trace is composed of a plurality of second metal lines arranged crosswise.

4. The vehicle-mounted antenna according to claim 3, characterized in that, the line width of the first metal line is 2 microns to 30 microns; the distance between adjacent first metal lines is 50 microns to 200 microns; the thickness of the first metal line is 1 micron to 10 microns; the line width of the second metal line is 2 microns to 30 microns; the distance between adjacent second metal lines is 50 microns to 200 microns; the thickness of the second metal line is 1 micron to 10 microns.

5. The vehicle-mounted antenna according to claim 3, characterized in that, a plurality of the first metal lines arranged crosswise form a first hollow structure, and a plurality of the second metal lines arranged crosswise form a second hollow structure; the orthographic projection of the first hollow structure on the first substrate coincides with the orthographic projection of the second hollow structure on the first substrate.

6. The vehicle-mounted antenna according to claim 1, characterized in that, the shape of the opening is U-shaped, linear or annular.

7. The vehicle-mounted antenna according to claim 1, characterized in that, the vehicle-mounted antenna is installed on an automotive glass; the automotive glass includes: a first glass and a second glass arranged oppositely, and an adhesive layer located between the first glass and the second glass; the first glass serves as the first substrate, and the second glass serves as the second substrate.

8. The vehicle-mounted antenna according to any one of claims 1 to 7, characterized in that, the vehicle-mounted antenna further includes: a grounding layer; the automotive body serves as the grounding layer.

9. A vehicle-mounted electronic device, characterized in that, the vehicle-mounted electronic device includes the vehicle-mounted antenna according to any one of claims 1-8.

10. A method for manufacturing a vehicle-mounted antenna, characterized in that, the method for manufacturing a vehicle-mounted antenna includes: forming a feed trace layer on a first substrate; the feed trace layer includes: at least one feed trace; forming a radiation coupling layer on a second substrate; the radiation coupling layer is provided with an opening; The first substrate having the feed trace layer formed thereon and the second substrate having the radiation coupling layer formed thereon are oppositely attached to each other such that the orthographic projection of at least one of the feed traces on the first substrate overlaps at least partially with the orthographic projection of the opening on the first substrate; Forming the radiation coupling layer on the second substrate includes: Forming a first metal layer on the second substrate; Processing the first metal layer by a photolithography process or an imprinting process to form a plurality of first metal lines arranged crosswise; the opening is formed by disconnecting some of the first metal lines, and the width of the opening is smaller than the width of the feed trace.

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