Window aerial for motor vehicles

• US 20060273966A1
• Filed: 04/21/2004
• Published: 12/07/2006
• Est. Priority Date: 05/02/2003
• Status: Active Grant

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Maeuser, Helmut
• Granted Patent: US 7,388,548 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 1/1285 with capacitive feeding through the windscreen
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00

Abstract

An antenna glazing for automobiles, including an electrically conducting cladding extending surface-wise over the surface of the glazing up to a zone of the free edge of the cladding, serving as an antenna element, and a coupling electrode furnished with external connections, coupled in the capacitive regime to the electrically conducting cladding with interposition of an insulating layer. The coupling electrode is composed at least of one thin wire, which starts from the zone at the edge of the glazing, is conducted over the surface covered by the cladding, and is returned to the zone of the edge with at least one fold, so that the two ends of the wire are situated in the zone of the edge of the glazing.

Claims

1-16. -16. (canceled)

17. An antenna glazing for automobiles, comprising:

an electrically conducting cladding extending surface-wise over a surface of the glazing up to a zone of a free edge of the cladding, the cladding serving as antenna element; and

a coupling electrode including external connections, and being coupled in a capacitive regime to the electrically conducting cladding with interposition of an insulating layer, and the coupling electrode being composed of at least of one thin wire; and

wherein the at least thin wire starts from the zone at the edge of the glazing, is conducted over the surface covered by the cladding, and is returned to the zone of the edge with at least one fold, so that the two ends of the wire are situated in the zone of the edge of the glazing.

18. The antenna glazing as claimed in claim 17, wherein the wire of the coupling electrode forms a loop, starting from its point of reversal furthest from the ends of the wire, is folded back until the ends of the wire are in proximity, the portions of the wire extending parallel to one another with spacings that are appreciably larger than the thickness of the wire.

19. The antenna glazing as claimed in claim 17, wherein the two ends of the wire of the coupling electrode are placed in a narrow local neighborhood.

20. The antenna glazing as claimed in claim 17, wherein the two ends of the wire of the coupling electrode are placed at locations spaced apart.

21. The antenna glazing as claimed in claim 17, wherein the two ends of the wire of the coupling electrode are placed in proximity to two different corners.

22. The antenna glazing as claimed in claim 17, wherein a first end of the wire of the coupling electrode is linked to a receiver and/or transmitter apparatus downstream, while a second end is free or terminated by a matching resistor.

23. The antenna glazing as claimed in claim 17, wherein plural coupling electrodes are provided at spaced apart locations.

24. The antenna glazing as claimed in claim 23, wherein ends of the wires of the plural coupling electrodes are placed in a narrow local neighborhood.

25. The antenna glazing as claimed in claim 17, wherein the edge zone is covered with an opaque edge strip, the strip covering the coupling electrode at least partially.

26. The antenna glazing as claimed in claim 17, wherein the external connections for the coupling electrode are established with aid of a connection element, forming an interface that is linked to the ends of the wire of the coupling electrode in the zone at the edge of the glazing.

27. The antenna glazing as claimed in claim 17, wherein the coupling electrode is a component prefabricated on a support, with an adhesive layer for fixing by adhesion of the wire to the antenna glazing.

28. The antenna glazing as claimed in claim 27, wherein the prefabricated component comprises an interface for establishing the external connections of the coupling electrode.

29. The antenna glazing as claimed in claim 17, wherein the conducting cladding and the coupling electrode are placed inside a composite forming the glazing, from which the ends of the coupling electrode and/or an interface linked to them are conducted to an outside point.

30. The antenna glazing as claimed in claim 17, wherein the coupling electrode is connectable to an electrical supply voltage superimposed on the antenna signal voltage and is usable in guise of an electric heating element on demand.

31. The antenna glazing as claimed in claim 17, wherein the at least one thin wire of the coupling electrode exhibits a diameter in a range lying between 10 and 100 μ

m.

32. The use of an antenna glazing as claimed in claim 23 within a framework of a diversity antenna device.