High-performance Room-temperature LNA Development for Radio Astronomy

This paper focuses on the development of highperformance room-temperature low-noise amplifiers (LNAs) for radio astronomy aiming to compete with traditional cryogenic LNAs.The LNA, a core component of the radio telescope receiver, is essential for minimizing the system noise temperature and achieving high sensitivity.This paper details the design and measurement results of two LNAs: LNA1 (1 -1.8 GHz) for the FAST core array and LNA2 (0.9 -1.3 GHz) for the BINGO telescope.The results demonstrate that these room-temperature LNAs can match the performance of cryogenic LNAs to some extent, with significantly reduced noise temperatures, particularly when thermoelectric cooling is applied.These advancements provide a more reliable and cost-effective solution for receivers of telescope arrays and multi-beam receivers in radio astronomy.