DE-102024132829-A1 - Antenna device for integration into a disc

Abstract

The invention relates to an antenna device (4) for integration into a disk (5), with at least one antenna structure (6) for transmitting and/or receiving electromagnetic radiation, characterized in that the antenna device (4) has a cover film (7) which corresponds at least partially to the antenna structure (6), and wherein the cover film (7) is designed to reduce the optical influence of the antenna structure (6) in the disk (5).

Inventors

• Annegret Matthai
• Marcus Bullerjahn
• Jan Magnus Guldbakke

Assignees

• AUDI AKTIENGESELLSCHAFT
• VOLKSWAGEN AKTIENGESELLSCHAFT

Dates

Publication Date

20260513

Application Date

20241111

Claims (10)

1. Antenna device (4) for integration into a disk (5), with at least one antenna structure (6) for transmitting and/or receiving electromagnetic radiation, characterized in that the antenna device (4) has a cover film (7) which corresponds at least partially to the antenna structure (6), and wherein the cover film (7) is designed to reduce an optical influence of the antenna structure (6) in the disk (5).
2. antenna device (4) according Claim 1 , characterized in that the cover film (7) is colored at least in some areas with an optical pattern.
3. antenna device (4) according Claim 1 or 2 , characterized in that the cover film (7) is printed at least partially with an optical pattern.
4. Antenna device (4) according to one of the preceding claims, characterized in that the cover film (7) and the antenna structure (6) are formed separately from each other.
5. antenna device (4) according to one of the Claims 1 until 3 , characterized in that the antenna structure (6) is integrated into the cover film (7).
6. Antenna device (4) according to one of the preceding claims, characterized in that the cover film (7) overlaps the antenna structure (6).
7. antenna device (4) according to one of the Claims 1 until 5 , characterized in that the cover film (7) only partially covers the antenna structure (6).
8. Antenna device (4) according to one of the preceding claims, characterized in that the cover film (7) is made of polyvinyl butyral.
9. Antenna device (4) according to one of the preceding claims, characterized in that the antenna device (4) can be integrated into a disc (5) of a motor vehicle (1).
10. Antenna device (4) according to one of the preceding claims, characterized in that the antenna structure (6) is designed as a foil antenna.

Description

The following invention relates to an antenna device for integration into a disk, with at least one antenna structure for transmitting and/or receiving electromagnetic radiation. It is already known from the prior art that a variety of antennas are now integrated into, for example, the roof antenna of a vehicle as so-called shark fins. These antennas can be designed as 5G antennas, Wi-Fi antennas, GNSS antennas, V2X antennas, SXM antennas, or similar. This has the disadvantage that the integration location and appearance are unfavorable. Furthermore, the visible area of the roof glazing is reduced, and it increases the vehicle's drag coefficient (Cd). The roof glazing, however, requires a corresponding cutout in the glass, which necessitates a complex manufacturing process. These drawbacks can essentially be eliminated by using transparent film antennas embedded in the glazing. A challenge, however, lies in integrating these at least partially transparent film antennas into the glazing in such a way that no transitions or structures are visible in the glazing. Furthermore, it is already known from the prior art that so-called slot antennas are used in glazing concepts, along with visible printed antenna structures. These are usually integrated beneath black printed surfaces (ceramic printing), thus severely limiting the integration location and the visual appearance. This can also affect the performance of the individual antennas. Antennas embedded in laminated glass are also known; these are achieved by inserting antenna wires into the interlayer material. The wires are visible to the customer. Disadvantages of this technology include a complex process and the associated high costs, as well as a potential impairment of the driver's view. The CN 211764831 U The disclosure relates to a vehicle window glass, a window assembly, and a vehicle, wherein the vehicle window glass comprises laminated glass, an antenna assembly, a bonding layer, and an explosion-proof film, and the laminated glass comprises an outer layer glass and an inner layer glass stacked with the outer layer glass. The bonding layer is provided with a slotted structure and is arranged between the outer layer glass and the inner layer glass. The antenna assembly is arranged in the slotted structure. An explosion-proof membrane is arranged between the outer layer glass and the antenna assembly and/or an explosion-proof membrane is arranged between the antenna assembly and the inner layer glass. The antenna assembly can be effectively protected, and the problems of bubbles, cracks, and qualified penetration resistance and impact resistance, etc., which are created by laminated glass of a conventional embedded antenna in a lamination process, are solved, thus improving the safety and communication reliability of the vehicle window glass and window assembly with the embedded antenna and a vehicle. The US 9,755,299 B2 This describes a window assembly for a vehicle with a transparent layer containing a metal compound, making the transparent layer electrically conductive. The transparent layer defines an area that covers the window assembly. An outer, electrically non-conductive area surrounds this area. The window assembly includes an antenna element with a wire or a transparent coating, located within and surrounded by the outer area without extending into the transparent layer. The antenna element is electrically isolated from the transparent layer, allowing it to operate independently. A power supply element is coupled to the antenna element to provide it with energy. The power supply element is also electrically isolated from the transparent layer, ensuring that it powers the antenna element independently. A disadvantage of the current state of the art is that the corresponding antenna structures within the window remain visible to a user and can therefore, for example, impair the view of the vehicle's surroundings. The object of the present invention is to create an antenna device by means of which the disadvantages of the prior art are overcome. In particular, the object of the present invention is to create an antenna device by means of which an antenna structure of the antenna device can be reliably concealed within the window, or the visibility of the antenna structure can be reduced in order to increase road safety. This problem is solved by an antenna device according to the independent claims. Advantageous embodiments are specified in the dependent claims. One aspect of the invention relates to an antenna device for integration into a disk, with at least one antenna structure for transmitting and/or receiving electromagnetic radiation. It is provided that the antenna device has a cover film which corresponds at least partially to the antenna structure, and wherein the cover film is formed in the disc to reduce an optical influence of the antenna structure. In particular, the cover film can thus substantially reduce the optical influences o