Abstract
This letter presents a 0.9–1.8-GHz cryo-CMOS low-noise amplifier (LNA) built-in standard 65-nm CMOS for highly integrated radio astronomy receivers. The measured cryogenic noise parameters confirm noise matching in the band and demonstrate that the LNA nears its minimum noise temperature at the desired frequency range. The proposed LNA operates at 20 K, consumes 115 mW of power, and provides a 37.2 ± 2.4 dB gain ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$S_{21}$ </tex-math></inline-formula> ) with a noise temperature (figure) of 2.3 to 8.5 K (0.03 to 0.13 dB) and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$| S_{11}| < -10$ </tex-math></inline-formula> dB.
Published Version
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