What characteristics of MMICs make them a popular choice for VHF through microwave circuits?
Why An MMIC (monolithic microwave integrated circuit) is a complete amplifier stage built on one semiconductor chip, usually in a small package with input, output, ground and bias leads. Its internal matching networks are designed for a fixed system impedance, typically 50 ohms, at both input and output across its rated band, so you can cascade stages without designing matching networks. Combined with a specified flat gain and a low noise figure, that makes VHF, UHF and microwave amplifier design almost a matter of adding a bias resistor and blocking capacitors.
Watch out The choice with nearly infinite gain, very high input impedance and very low output impedance is the description of an ideal operational amplifier, not an MMIC; the extremely high Q answer describes a resonator or crystal.
MMIC = plug-and-play 50 ohm gain block: fixed gain, low noise, matched in and out.