The APTC4-01001800-1900-D4 from AmpliTech is a Cryogenic Amplifier that operates from 1 to 18 GHz. It provides a gain of more than 23 dB with a noise figure of less than 2.5 dB and an output P1dB of +8 dBm. The amplifier requires a DC supply of 9 V and consumes 150 mA of current.