A single chip broadband noise source for noise measurements at cryogenic temperatures

Summary form only given, as follows. This paper presents the design and performance of a single-chip broadband noise source for on-chip measurements in a cryogenic environment. The noise source generates input noise powers, Pc and Ph, which are required by the Y-factor method. High accuracy in temperature control and impedance presented to the DUT is achieved over a wide temperature range from 7 K to 100 K. Noise temperature measurements of a cryogenic LNA were performed on-chip and show a typical accuracy of ±1 K.