Transparent integrated vehicle-mounted antenna

Abstract

The invention discloses a transparent integrated vehicle-mounted antenna, and the antenna comprises a transparent substrate which can be installed and attached to the surface of glass; the antenna structure is arranged on the transparent substrate and comprises a transparent radiator, and the transparent radiator is in a metal grid shape; the surface of the side, facing the transparent substrate, of the double-layer FPC circuit soft board is connected with the transparent radiator; the surface of the side, deviating from the transparent substrate, of the double-layer FPC circuit soft board is connected with the feed cable; the transparent protective film layer is attached to the surface of the transparent substrate and covers the antenna structure; according to the transparent integrated vehicle-mounted antenna provided by the invention, the antenna units of a plurality of communication frequency bands are highly integrated on one transparent substrate, excellent broadband or multi-frequency band performance is realized on the premise of ensuring high light transmission through a metal grid-shaped antenna structure design, and the antenna is integrated in vehicle window glass or in and out of a vehicle window, so that the antenna structure is simple and convenient. An external protrusion is not needed, the original shape of a vehicle is perfectly kept, and antenna invisibility is achieved.

Description

Technical Field

[0001] This application relates to the field of vehicle communication technology, and more specifically to a transparent integrated vehicle antenna. Background Technology

[0002] With the development of intelligent connected vehicles and autonomous driving technologies, the demand for wireless communication in modern vehicles is growing exponentially, leading to a surge in the number of antennas required. These include, but are not limited to, cellular networks (4G / 5G / 6G), Global Navigation Satellite Systems (GNSS), in-vehicle Wi-Fi, Bluetooth, Dedicated Short Range Communication (DSRC / C-V2X), satellite broadcasting (such as SDARS), remote keyless entry (RKE), and tire pressure monitoring systems (TPMS). Currently, vehicle antennas mainly employ external types (such as whip antennas and shark fin antennas) or aftermarket glass antennas. External antennas detract from the overall aesthetics of the vehicle, increase wind noise, and are easily damaged. Traditional printed glass antennas, while concealed within glass, are typically single-function and cannot meet multi-band requirements. Furthermore, when integrating multi-band antennas, poor isolation and severe mutual interference between different frequency bands negatively impact communication quality. Simultaneously, the conductivity and transmittance of existing transparent conductive materials (such as indium tin oxide) present a contradiction, making it difficult to achieve excellent antenna radiation performance while maintaining high transmittance. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this application is to provide a transparent integrated vehicle antenna, thereby effectively solving the above-mentioned technical problems.

[0004] To achieve the above objectives, this application adopts the following technical solution: This application provides a transparent integrated vehicle antenna, comprising: A transparent substrate that can be mounted and attached to a glass surface; An antenna structure, disposed on the transparent substrate, includes a transparent radiator, wherein the transparent radiator is in the shape of a metal mesh; A double-layer FPC flexible circuit board, wherein the surface of the double-layer FPC flexible circuit board facing the transparent substrate is connected to the transparent radiator; The feed cable is connected to the surface of the double-layer FPC circuit board facing away from the transparent substrate. A transparent protective film layer is attached to the surface of the transparent substrate and covers the antenna structure.

[0005] Furthermore, the metal mesh of the transparent radiator is arranged in a horizontal and vertical direction and is set on the transparent substrate by inkjet printing, screen printing, photolithography, laser induction, or magnetron sputtering. The line width of the metal mesh is 0.01um~50um, the line spacing is 0.02um~1000um, and the line thickness is 0.2um~10um.

[0006] Furthermore, the transparent radiator includes a first radiator and a second radiator, with a gap between the first radiator and the second radiator to form a coupling match.

[0007] Furthermore, the first radiator and the second radiator are each provided with two pads. The pads of the first radiator are connected to the left and right sides of the double-layer FPC circuit board, and the pads of the second radiator are connected to the middle part of the double-layer FPC circuit board.

[0008] Furthermore, the pads of the first radiator and the second radiator each include a matte inert metal plating.

[0009] Furthermore, the double-layer FPC circuit board includes an inner circuit layer and an outer conductor layer, and the power supply cable includes an inner core and an outer conductor. The inner core of the power supply cable is connected to the inner circuit layer of the double-layer FPC circuit board, and the outer conductor of the power supply cable is connected to the outer conductor layer of the double-layer FPC circuit board.

[0010] Furthermore, the transparent protective film layer covers the area where the double-layer FPC circuit board connects to the transparent radiator.

[0011] Beneficial effects This application provides a transparent integrated vehicle antenna that highly integrates antenna elements of multiple communication frequency bands onto a transparent substrate. Through the antenna structure design in the shape of a metal mesh, it achieves excellent broadband or multi-band performance while ensuring high light transmittance. The antenna is integrated inside or outside the vehicle window glass, without the need for external protrusion, perfectly maintaining the original shape of the vehicle and achieving antenna invisibility. Attached Figure Description

[0012] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this application.

[0013] Figure 1 This is a schematic diagram of the overall structure of a vehicle-mounted antenna provided in one embodiment of this application.

[0014] Figure 2 This is an exploded view of a vehicle-mounted antenna provided in one embodiment of this application.

[0015] In the above attached figures, 1. Transparent substrate; 2. First radiator; 3. Second radiator; 4. Power supply cable; 5. Transparent protective film layer; 6. Double-layer FPC flexible circuit board. Detailed Implementation

[0016] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0017] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this document, "electrical connection" includes the situation where constituent elements are connected together by an element having some electrical function. There is no particular limitation on the "electrically functioning element," as long as it enables the transmission and reception of electrical signals between the connected constituent elements. An "electrically functioning element" can be, for example, an electrode or wiring, a switching element such as a transistor, or other functional elements such as a resistor, inductor, or capacitor. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0018] In this application, the terms "upper," "lower," "inner," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0019] Example This application discloses a transparent integrated vehicle antenna, such as Figure 1-2 As shown, the vehicle-mounted antenna includes: Transparent substrate 1 is made of high-strength transparent polymer materials (such as polycarbonate, polymethyl methacrylate, transparent nylon, glass, graphene, polyethylene terephthalate, polyvinyl chloride, polystyrene, polypropylene, polyethylene, acrylonitrile-styrene copolymer, K resin, thermoplastic polyurethane, polyethylene terephthalate, etc.), and can be mounted on the glass surface as the mounting medium for vehicle antennas. It can be installed in the glass positions of automobiles, high-speed trains, rail transit, etc.

[0020] The antenna structure is disposed on a transparent substrate 1, either on the surface or inside the transparent substrate 1. The antenna structure is a multifunctional composite antenna, comprising a large and a small transparent conductive radiator, namely a first radiator 2 and a second radiator 3. A gap is provided between the first radiator 2 and the second radiator 3 to form coupling matching, which is beneficial for impedance matching in a wide frequency band and can improve the current distribution between radiating elements, thereby achieving miniaturization and broadband. The transparent radiator is in the shape of a metal mesh, which is arranged in a horizontal and vertical direction. It is disposed on the transparent substrate 1 by inkjet printing, screen printing, photolithography, laser induction, or magnetron sputtering. The linewidth of the metal mesh is 0.01um~50um, the line spacing is 0.02um~1000um, and the line thickness is 0.2um~10um.

[0021] The double-layer FPC circuit board 6 has its surface facing the transparent substrate 1 connected to a transparent radiator. The first radiator 2 and the second radiator 3 are each provided with two pads, which are coated with a matte inert metal layer. The pads of the first radiator 2 are connected to the left and right sides of the double-layer FPC circuit board 6, and the pads of the second radiator 3 are connected to the middle part of the double-layer FPC circuit board 6. The double-layer FPC circuit board 6 and the pads are connected by anisotropic conductive adhesive film technology.

[0022] The feed cable 4 is connected to the surface of the double-layer FPC flexible circuit board 6 facing away from the transparent substrate 1. The double-layer FPC flexible circuit board 6 includes an inner circuit layer and an outer conductor layer. The feed cable 4 includes an inner core and an outer conductor. The inner core of the feed cable 4 is connected to the inner circuit layer of the double-layer FPC flexible circuit board 6, and the outer conductor of the feed cable 4 is connected to the outer conductor layer of the double-layer FPC flexible circuit board 6. The transparent protective film layer 5 is attached to the surface of the transparent substrate 1 and covers the antenna structure. It covers the conductive layer to provide physical protection and environmental isolation. At the same time, the transparent protective film layer 5 also covers the part where the double-layer FPC circuit board 6 is connected to the transparent radiator.

[0023] The transparent integrated vehicle antenna provided in this application integrates antennas with multiple communication functions, including at least two of the following: GNSS antenna function, cellular mobile communication antenna function, and FM broadcast antenna function. The antenna is integrated inside or both inside and outside the vehicle window glass, eliminating the need for external protrusions and perfectly preserving the original vehicle shape, achieving "antenna invisibility." Simultaneously, it employs a "transparent conductive body (main radiator)" design. The main radiator uses high-transmittance conductive materials to ensure a wide field of view, while the critical feeding and matching components use low-loss metals to ensure efficiency, resolving the contradiction between performance and light transmission. It also possesses excellent isolation and broadband characteristics, achieving coverage of multiple dense frequency bands. The structure is reliable and easy to mass-produce; the antenna structure can be embedded in the automotive glass layer or inside and outside the window, offering high reliability, waterproofing, and dustproofing, making it suitable for large-scale production in the automotive industry. Furthermore, it offers cost and maintenance advantages; the modular design allows integration during the glass assembly stage, and in case of damage, the antenna module (rather than the entire glass panel) can be replaced independently, reducing long-term operating costs.

[0024] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. A transparent integrated vehicle-mounted antenna, characterized in that: include: A transparent substrate that can be mounted and attached to a glass surface; An antenna structure, disposed on the transparent substrate, includes a transparent radiator, wherein the transparent radiator is in the shape of a metal mesh; A double-layer FPC flexible circuit board, wherein the surface of the double-layer FPC flexible circuit board facing the transparent substrate is connected to the transparent radiator; The feed cable is connected to the surface of the double-layer FPC circuit board facing away from the transparent substrate. A transparent protective film layer is attached to the surface of the transparent substrate and covers the antenna structure.

2. The transparent integrated vehicle-mounted antenna as described in claim 1, characterized in that: The metal mesh of the transparent radiator is arranged in a horizontal and vertical direction and is set on the transparent substrate by inkjet printing, screen printing, photolithography, laser induction or magnetron sputtering. The line width of the metal mesh is 0.01um~50um, the line spacing is 0.02um~1000um, and the line thickness is 0.2um~10um.

3. The transparent integrated vehicle-mounted antenna as described in claim 1, characterized in that: The transparent radiator includes a first radiator and a second radiator, with a gap between the first radiator and the second radiator to form a coupling match.

4. The transparent integrated vehicle-mounted antenna as described in claim 3, characterized in that: The first radiator and the second radiator are each provided with two pads. The pads of the first radiator are connected to the left and right sides of the double-layer FPC circuit board, and the pads of the second radiator are connected to the middle part of the double-layer FPC circuit board.

5. The transparent integrated vehicle antenna as described in claim 4, characterized in that: The pads of the first radiator and the second radiator each include a matte inert metal plating.

6. The transparent integrated vehicle-mounted antenna as described in claim 1, characterized in that: The double-layer FPC circuit board includes an inner circuit layer and an outer conductor layer. The power supply cable includes an inner core and an outer conductor. The inner core of the power supply cable is connected to the inner circuit layer of the double-layer FPC circuit board, and the outer conductor of the power supply cable is connected to the outer conductor layer of the double-layer FPC circuit board.

7. The transparent integrated vehicle-mounted antenna as described in claim 1, characterized in that: The transparent protective film layer covers the area where the double-layer FPC circuit board connects to the transparent radiator.

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