This manuscript describes our progress in the development of cryogenic wideband LNA for radio-astronomical applications. With technology maturity and fabrication cost taken into account, the WIN 0.15 μm GaAs pHEMT process is used for the 5-10 GHz and 8-20 GHz LNA design. Room-temperature S-parameters and noise temperature are measured first with gain larger than 20 dB, input and output reflection coefficients below -10 dB within the intended bandwidth. As for the cryogenic noise measurement, the 6 dB cold-attenuator method is used to obtain the corresponding Tn at different ambient temperatures. A noise improvement factor of 3 is observed for cryogenic LNA designed with this 0.15 μm GaAs process.