EVAL-AD8349 material

Question

I wander the EVAL-AD8349 evaluation board material ,is it FR4 or Rogers material , I can't make sure that if the FR4 material board can go 2.4 GHz 
 signal well.In the meanwhile,I used FR4 material at a two layer board to operate AD8349,finding it too hot , I wonder why and can I improve it by changing the material or changing 2 layers to 4 layers. Waiting for answer,thank you.!!!

dmailloux · Accepted Answer

Apologies for the delayed response. We've had some updates to our automatic message notifications, and previously did not see this message when it was posted. 
 The board material is FR-4. If the device is hot, you may need additional grounding vias for good thermal performance. You will notice the standard evaluation board has ground vias underneath the device.)

Electronic Design Services - PartnerZone

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EVAL-AD8349 material