Low noise, indium phosphide monolithic microwave integrated circuit amplifiers for radioastronomy

A range of low-noise amplifiers have been designed for both the new and the proposed observing bands for the Australia Telescope National Facility Compact Array antennas. The amplifiers, which operate in three bands in the range 16 GHz to 115 GHz, use indium phosphide based high electron mobility transistor, monolithic microwave integrated circuit technology. We will describe the amplifier design and report the room temperature on-wafer performance of these amplifiers.