Window assembly having a coplanar waveguide to coplanar waveguide coupler for radio frequency devices

Patent metadata

Field	Value
Publication number	US-10854940-B2
Application number	US-201815889724-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Feb 6, 2018
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A window assembly includes a first radio frequency device disposed between a first window substrate and a second window substrate. An embedded coplanar waveguide is disposed between the first window substrate and the second window substrate, and is attached to the first radio frequency device. An exterior coplanar waveguide is disposed adjacent an exterior side surface of the first window substrate, and is disposed opposite the embedded coplanar waveguide for communicating electromagnetic waves therebetween. A printed circuit board is attached to and interconnects the exterior coplanar waveguide and a radio frequency cable connector. The radio frequency cable connector is configured for connection to a second radio frequency device. An adhesive layer bonds the printed circuit board to the exterior side surface of the first window substrate.

First claim

What is claimed is:

1. A window assembly comprising:
a first window substrate having a first side surface and a second side surface;
a second window substrate having a first side surface and a second side surface, with the first side surface of the first window substrate facing the first side surface of the second window substrate;
a first radio frequency device disposed between the first window substrate and the second window substrate;
an embedded coplanar waveguide disposed between the first window substrate and the second window substrate, and attached to the first radio frequency device; and
an exterior coplanar waveguide disposed adjacent the second side surface of the first window substrate, and disposed opposite the embedded coplanar waveguide for communicating electromagnetic waves therebetween;

wherein each of the embedded coplanar waveguide and the exterior coplanar waveguide include a respective first ground plane portion, a respective central conductor portion, and a respective second ground plane portion, with the respective first ground plane portions and the respective central conductor portions separated by a respective first gap, and with the respective second ground plane portions and the respective central conductor portions separated by a respective second gap;
wherein each of the embedded coplanar waveguide and the exterior coplanar waveguide include a coupled region length measured along a longitudinal axis between a first transverse reference line and a second transverse reference line; and
wherein the coupled region length of each of the embedded coplanar waveguide and the exterior coplanar waveguide is substantially equal to a length of a highest design frequency wavelength in glass, divided by two.

2. The window assembly set forth in claim 1 , wherein the first window substrate and the second window substrate are glass substrates.

3. The window assembly set forth in claim 1 , wherein the first radio frequency device includes a radio frequency antenna.

4. The window assembly set forth in claim 1 , further comprising a radio frequency cable connector attached to the exterior coplanar waveguide and configured for connection to a second radio frequency device.

5. The window assembly set forth in claim 4 , further comprising a printed circuit board attached to and interconnecting the exterior coplanar waveguide and the radio frequency cable connector.

6. The window assembly set forth in claim 5 , further comprising an adhesive layer bonding the printed circuit board to the second side surface of the first window substrate.

7. The window assembly set forth in claim 1 , wherein each respective central conductor portion includes a body portion having a planar rectangular shape, and an end portion having a planar isosceles trapezoidal shape.

8. The window assembly set forth in claim 7 , wherein each respective first ground plane portion includes a body portion having a planar rectangular shape, and an end portion having a planar trapezoidal shape.

9. The window assembly set forth in claim 8 , wherein each respective second ground plane portion includes a body portion having a planar rectangular shape, and an end portion having a planar trapezoidal shape.

10. The window assembly set forth in claim 9 , wherein:
the end portion of the central conductor portion of the exterior coplanar waveguide includes an edge aligned along a first transverse reference line that is perpendicular to the central longitudinal axis;
the end portion of the first ground plane portion of the exterior coplanar waveguide includes an edge aligned along the first transverse reference line; and
the end portion of the second ground plane portion of the exterior coplanar waveguide includes an edge aligned along the first transverse reference line.

11. The window assembly set forth in claim 9 , wherein:
the end portion of the central conductor portion of the embedded coplanar waveguide includes an edge aligned along a second transverse reference line that is perpendicular to a central longitudinal axis;
the end portion of the first ground plane portion of the embedded coplanar waveguide includes an edge aligned along the second transverse reference line; and
the end portion of the second ground plane portion of the embedded coplanar waveguide includes an edge aligned along the second transverse reference line.

12. The window assembly set forth in claim 11 , wherein the first transverse reference line and the second transverse reference line are parallel with each other, and spaced apart from each other along the central longitudinal axis.

13. The window assembly set forth in claim 1 , wherein each respective first gap includes a first gap width, and wherein each respective second gap includes a second gap width, with the first gap width different from the second gap width.

14. The window assembly set forth in claim 13 , wherein the first gap width is less than the second gap width.

15. The window assembly set forth in claim 1 , wherein each respective central conductor portion includes a conductor width.

16. The window assembly set forth in claim 15 , wherein the conductor width of each respective central conductor portion is substantially equal to a length of a highest design frequency wavelength in glass, divided by four.

17. The window assembly set forth in claim 16 , wherein a first gap width for each respective first gap is less than the conductor width.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Song Hyok Jae
• Talty Timothy J
• Schaffner James H
• Carper Duane S
• Yasan Eray

Classifications

• B32B2605/006

  Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings · CPC title

• H01P3/003 Primary

  Coplanar lines · CPC title

• B32B17/00

  Layered products essentially comprising sheet glass, or glass, slag, or like fibres · CPC title

• H01P3/006

  Conductor backed coplanar waveguides · CPC title

• H01P5/028

  between strip lines · CPC title