Hello ryan-tsai,
The HMC1086F10 is compatible with pulsed power applications.
It is recommended that the pulsing of power be accomplished via the Vdd pins.
Pulsing of power via the gates would provide acceptable results only if your application can tolerate a long delay before the output waveform has stabilized.
The rise and fall times would be more strongly influenced by the pulse circuitry and the external capacitive bypassing than by the amplifier itself.
That said, depending upon how you choose to modulate the power it is possible to obtain sub microsecond drain voltage rise times and nanosecond output power rise times.
Regards,
SMcBride