For a single-ended (unbalanced) transmission line in microstrip, dielectric losses (defined by a substrate's dissipation factor) will be less than.
On this page we will review the math for calculating the RF loss of microstrip transmission lines over frequency. Here we may (or may not) refer to a paper written.
Chances are you'll end up with a board thickness that is four times that of your microstrip board to get equivalent transmission line loss. That means you'll need .