Digital signals in RF PCB
Sadly I can't add a comment (&lt; 50 rep) anyways, to optimize further, place the SMA's on the opposite side of the board, you are effectively smashing the wave into metal, and causing mismatch.

Take a look at.
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.399.4140&amp;rep=rep1&amp;type=pdf