Why The common MAR/ERA style MMIC amplifier has only four leads: RF in, RF out, and two grounds. There is no separate Vcc pin, so DC bias is fed into the device through the output lead, using a series dropping resistor and/or an RF choke to set the current while keeping the RF signal from being shorted to the supply. A DC blocking capacitor after that feed point passes the amplified RF to the next stage.
Watch out Expecting a dedicated Vcc lead is the natural assumption from other ICs, but this MMIC package simply does not have one; feeding bias into the input lead would also disturb the input matching and the driving stage.
MMIC = no Vcc pin. Bias rides in on the output lead through a resistor/choke.