0cc-5 0.25 urn PHEMT X Band Multifunction LNA MMIC with T/RSwitch and Attenuator Achieves 1.85 dB Noise Figure S.T.Janesch, K.H.G.Duh, P.Ho, S.C.Wang, S.M.J.Liu General Electric Company Electronics Laboratory Syracuse, NY, 13221 Abstract Performance of a 7-11 GHz LNA MMIC which advances performance and integration standards is presented. A 1.8 dB NF, 19 dB gain LNA is married to a 0.5 dB insertion loss T/R switch and switched attenuator for a MMIC with 1.85 dB NF, 18 dB gain at 10 GHz. Introduction The MMIC described in this paper represents an advance in the state of the art in low noise amplifier (LNA) performance and integration for radar applications. The self-biased two stage LNA achieves 1.45 to 1.8 dB noise figure and greater than 19 dB gain from 7 to 11 GHz. Preceding the LNA is a t……