Rear side window defrosters?

[Shakeyfly]

ok I'm at a lost here... not sure if this is side window defrosters or an Antennae? I just bought a 2014 Sr5 and I was looking closer at BOTH the rear side windows, and noticed what looks like a defroster grid. Are these windows partially defrosted? or is it just the anntenae?

thanks! :drummer:

 

[BenSD]

That is your radio antenna.