HMC8193 recommended vias on Exposed Ground Paddle

Hello,

Please describe recommended via on Exposed Ground Paddle.

The number of vias to connect Exposed Ground Paddle and other layer of GND,
Diameter and type of via,
and etc.

It would be appreciate that providing EVB information such that material, # of layer, copper thickness, the number of vias and size and etc. Providing Gerber file is also appreciated.

Best Regards,