Method of making an antenna pane, and antenna pane

• US 6,313,796 B1
• Filed: 05/17/1995
• Issued: 11/06/2001
• Est. Priority Date: 01/21/1993
• Status: Expired due to Fees

• Current Assignee: Saint-Gobain Vitrage International
• Original Assignee: Saint-Gobain Vitrage International
• Inventors: Letemps, Bernard, Potin, Marc
• Primary Examiner(s): Wimer, Michael C.
• Application Number:
  US08/443,389
• Time in Patent Office: 2,365 Days
• Field of Search: H01/Q.132, H01/Q.138, 343/700.MS, 343/711, 343/713
• US Class Current: 343/700.0MS
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: H01Q 1/1271 for mounting on windscreens
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them

Abstract

This invention relates to panes, notably laminated panes, composed of at least one sheet of rigid material, and permanently containing a surface antenna composed of at least one microstrip separated from an earth plane by a dielectric. These panes, having such an antenna, are used for the reception and transmission of frequencies higher than 1 GHz and preferably for the frequency bands 5795-5815 MHz, 63-64 GHz and 74-77 GHz.

Claims

1. An antenna pane for a vehicle, comprising:

at least one sheet of rigid material; and

a surface antenna comprising at least one microstrip separated from an earth plane by a dielectric fixedly mounted on said at least one sheet;

an electronic chip connected to said antenna for demodulating a signal received by said antenna;

wherein said sheet comprises at least two glass sheets; and

said antenna is integrated between said at least two glass sheets.

2. A pane according to claim 1, wherein said sheet comprises at least one glass sheet and at least one film of plastic material.

3. A pane according to claim 2, wherein said sheet comprises at least two glass sheets separated by an intermediate film of polyvinyl butyral.

4. A pane according to claim 3, wherein said antenna is disposed between said intermediate layer and one of said glass sheets.

5. A pane according to claim 3, comprising:

a first glass sheet of said at least two glass sheets facing towards a passenger compartment of said vehicle; and

a reflective film formed on said first glass sheet and used as said earth plane.

6. A pane according to claim 3, wherein said intermediate film is used as said dielectric.

7. Using an antenna comprising a surface antenna, as described in claim 3, for the reception and transmission of frequencies greater than 1 GHz.

8. A pane according to claim 2, comprising:

an electronic chip connected to said surface antenna;

one surface of one of said at least one glass sheet and at least one plastic film having a wave reflecting coating;

at least one of said chip and said surface antenna being disposed in a position outside said reflective coating, when said pane is mounted on said vehicle.

9. Using an antenna comprising a surface antenna, as described in claim 3, for the reception and transmission of frequencies in the range of 5795-5815 MHz.

10. Using an antenna comprising a surface antenna, as described in claim 3, for the reception and transmission of frequencies in the range of 63-64 GHz.

11. Using an antenna comprising a surface antenna, as described in claim 3, for the reception and transmission of frequencies in the range of 74-77 GHz.

12. A pane according to claim 1, further comprising a cable for receiving a demodulated signal outputted by said electronic chip.

13. A pane for a vehicle, comprising:

at least two glass sheets separated by an intermediate layer;

an electronic chip disposed between said at least two glass sheets for at least one of demodulating and processing an ultra high frequency signal.

14. A pane according to claim 13, wherein said electronic chip has an area between 1 and 2 mm² and a thickness less than 150 μ

.

15. A pane according to claim 13, wherein said electronic chip can withstand temperatures between −

70°

C. and 160°

C.

16. A pane according to claim 13, wherein said electronic chip can withstand pressures of at least 3 bars.

17. A pane according to claim 13, wherein said electronic chip performs at least one of the following:

demodulation of a signal, processing of a signal, mist detection, identification of a vehicle, and detection of variations in predetermined parameters.

18. A pane according to claim 13, wherein said electronic chip is fixed to an integration support by a flip-chip technique.

19. A pane according to claim 13, further comprising a cable for receiving a demodulated signal outputted by said electronic chip.

20. A process for producing a laminated pane for a vehicle, comprising, during said pane, depositing a previously manufactured surface antenna associated with an electronic chip for demodulating a signal received by said antenna on said pane.

21. A process according to claim 20, further comprising depositing a cable for receiving a demodulated signal outputted by said electronic chip.

22. A process for producing a laminated pane for a vehicle, comprising:

forming at least one glass sheet; and

mounting a surface antenna associated with an electronic chip for demodulating a signal received by said antenna within said pane simultaneously with producing said pane.

23. A process according to claim 22, comprising

depositing at least one constituent film of said antenna on one face of one said at least one glass sheet.

24. A process according to claim 22, comprising:

forming two glass sheets; and

interposing a dielectric between said two glass sheets.

25. A process according to claim 22, comprising:

forming said pane by disposing an intermediate layer of polyvinyl butyral between at least two glass sheets; and

depositing at least one film forming said antenna on a face of the intermediate layer.

26. A process according to claim 22, further comprising mounting within said pane a cable for receiving a demodulated signal outputted by said electronic chip.