Low-Noise Amplifier for Next-Generation Radio Astronomy Telescopes: Review of the State-of-the-Art Cryogenic LNAs in the Most Challenging Applications

Radio astronomy is a subfield of astronomy that explores the universe via radio signals up to a few terahertz. Since the first detection of radio signals from the Milky Way by Karl G. Jansky in 1932, various types of radio sources have been identified from our solar system, the local universe, extragalactic space, and all of the way back to the beginning of the universe.