A 60GHz MMIC Low-noise Amplifier (LNA) was designed and simulated using OMMIC's 130nm GaAs mHEMT process. Based on the simulating results of Momentum, the main features of the LNA designed can be summarized as following: the three-stage LNA can reach 17dB average gain with less than ±0.5dB ripple in the operating frequency range (from 56GHz to 63GHz) and the noise figure is less than 3.15dB. Total chip size is 3000um×2000um.