If you search for the Input Power Specification for the 28GHz 2-way Wilkinson Power Divider, PDW07630, from Knowles Dielectric Labs, you may see it states “TBD” in the datasheet.
Knowles offers the comment below on this TBD status:
PDW07630 is able to safely handle 10W (40 dBm) over the operating temperature range from -55 to +85 C when properly mounted per our attached guide to a thermally conductive path to a good heatsink and used as a power divider into 1.2:1 VSWR terminations. If you are using with pulsed power or as a combiner, the handling will be different.
Applicable part number
1761-1121-ND