Windshield antenna and/or vehicle incorporating the same

• US 20090128431A1
• Filed: 11/20/2007
• Published: 05/21/2009
• Est. Priority Date: 11/20/2007
• Status: Active Grant

• Current Assignee: ACR II Glass America Incorporated
• Original Assignee: Centre Luxembourgeois de Recherches pour le Verre et la Ceramique SA
• Inventors: Martin, Danny
• Granted Patent: US 7,847,745 B2
• Time in Patent Office: Days
• US Class Current: 343/713
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10376 Laminated safety glass or glazing containing metal wires
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: H01Q 1/1271 for mounting on windscreens
• CPC Class Codes: H01Q 1/325 characterised by the location of the antenna on the vehicle
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material

Abstract

Certain example embodiments of this invention relate to an antenna wire embedded in a windshield, and/or vehicle incorporating the same. In certain example embodiments, an antenna wire may be embedded in an interlayer (e.g., a PVB interlayer) that is surrounded by two substrates (e.g., glass substrates). The antenna wire includes a fixed end electrically connected to a component (e.g., a bus bar) and a free end mechanically held in the interlayer via an adhesive (e.g., an adhesive tape). Thus, it may be possible to reduce distortion of the antenna wire and/or cause the antenna wire to be disposed in a manner that more closely conforms to a predetermined pattern. In certain example embodiments, the adhesive may be located at a non-visible portion of the windshield. In certain other example embodiments, the adhesive may be located at a visible portion of the windshield, and it optionally may be substantially transparent and/or provided in an aesthetically pleasing fashion.

Claims

1. A vehicle windshield comprising:

first and second substrates laminated to one another via at least a polymer based interlayer;

at least one conductive bus bar provided between the first and second substrates; and

at least one antenna wire provided at least partially between the first and second substrates, the antenna wire including a fixed end and a free end disposed at opposing ends of the antenna wire, wherein the antenna wire is electrically connected to the bus bar at the fixed end thereof, and

wherein the antenna wire is mechanically attached to the polymer based interlayer at the free end thereof via an adhesive.

2. The vehicle windshield of claim 1, wherein the first and second substrates are glass substrates.

3. The vehicle windshield of claim 1, wherein the interlayer comprises polyvinyl butyral (PVB).

4. The vehicle windshield of claim 1, wherein the at least one antenna wire is electrically connected to the bus bar via soldering.

5. The vehicle windshield of claim 1, wherein the adhesive is an adhesive tape.

6. The vehicle windshield of claim 5, wherein the adhesive tape is a decorative adhesive tape.

7. The vehicle windshield of claim 1, wherein the adhesive is a substantially transparent adhesive.

8. The vehicle windshield of claim 1, wherein the adhesive is disposed on a portion of windshield such that the adhesive is visible after the windshield is installed in a vehicle.

9. The vehicle windshield of claim 1, further comprising an enamel disposed around at least a part of a periphery of the windshield.

10. The vehicle windshield of claim 9, wherein the adhesive is disposed behind the enamel so as to be hidden from view.

11. The vehicle windshield of claim 1, wherein each said antenna wire is disposed substantially parallel to a respective edge of the windshield and substantially perpendicular to at least one said bus bar.

12. The vehicle windshield of claim 1, further comprising another bus bar and at least one heatable layer in electrical communication with the bus bars, the heatable layer extending across a substantial portion of the windshield.

13. A vehicle windshield, comprising:

first and second glass substrates laminated to one another via at least a polymer inclusive interlayer;

two conductive bus bars provided between the first and second substrates;

two parallel spaced apart antenna wires substantially perpendicular to at least portions of the two bus bars, respectively, each said antenna wire including a fixed end and a free end, the fixed ends and the free ends being disposed at opposing ends of the respective antenna wires; and

an enamel layer disposed around at least a part of a periphery of the windshield,

wherein each said antenna wire is electrically connected at the fixed end thereof to one said bus bar, and

wherein each said antenna wire is mechanically connected at the free end thereof to the interlayer via an adhesive tape, the adhesive tape being located behind the enamel so as to be hidden from view.

14. A method of making a vehicle windshield, the method comprising:

laminating first and second glass substrates to one another via at least a polymer inclusive interlayer;

providing at least one conductive bus bar between the first and second substrates;

providing at least one antenna wire in the interlayer in a predetermined pattern and/or at a predetermined location with respect to the windshield;

electrically connecting the at least one antenna wire at a fixed end thereof to the at least one bus bar; and

mechanically connecting the at least one antenna wire at a free end thereof to the interlayer via an adhesive so as to reduce distortion of the at least one antenna wire during heat treatment and/or application of pressure to the windshield and/or a windshield component.

15. The method of claim 14, wherein the interlayer comprises polyvinyl butyral (PVB).

16. The method of claim 14, further comprising soldering the at least one antenna wire to the at least one bus bar.

17. The method of claim 14, wherein the adhesive tape is a decorative adhesive tape.

18. The method of claim 14, wherein the adhesive tape is substantially transparent.

19. The method of claim 14, further comprising disposing the adhesive tape on a portion of windshield such that the location of adhesive tape is visible after the windshield is installed in a vehicle.

20. The method of claim 14, further comprising providing an enamel around at least a part of a periphery of the windshield.

21. The method of claim 20, further comprising locating the adhesive tape behind the enamel.

22. The method of claim 14, further comprising providing at least one heatable layer in electrical communication with the at least one bus bar.