Grounded Coplanar Waveguide on flexible substrate.

OK, I know this is an abomination, but has anyone tried the experiment of putting a Grounded Coplanar Waveguide on a flexi circuit substrate such as Pyralux?

If you've tried this I'd just be curious to know what the losses were like and how well the return loss held up as it was flexed.

Thanks.

I guess this is relate to your operation frequency, what's your freq band?