Okay, you say that we can operate it well beyond P1dB, but what is the maximum input power(in dBm) for safe operation.Maximum input power for a GaN transistor is meningful only to not damage the transistor, and not for other paramaters as P1dB, which is an important parameter in LDMOS, BJTs, CMOS, or JFETs.
In GaN, if you look to the plots of gain vs output/input power, will see that GaN devices starts to compress at very low power levels, when other types compress right before saturation.
what is the maximum input power(in dBm) for safe operation.
I found a research paper using ~31dBm (which I calculated by subtracting gain from the output power, they reported)
So I decided to move with 30dBm
I think you missed my point/ The gate won't absorb much power since it is high impedance. There is only a V limit.There is no information in the datasheet about safe maximum input power for this transistor.
Only the manufacturer can give you this information.
In a design you can assume any maximum input power you want, but not when is about damaging the device. So, ask the manufacturer about this information..