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

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.