Analysis and Design of X-Band LNA Using Parallel Technique

International audienceIn this paper, a new method based on parallelamplifier design technique for low noise amplifiers (LNA) isinvestigated in order to improve the linearity and noise figure (NF).Considering two inductively degenerated common source (IDCS)topology as parallel networks, the minimum noise figure (NFmin)and optimum noise impedance (Zsopt) and Rn (equivalent noiseresistance) are calculated. Simulation result for the designed 8-11GHz LNA with the 0.1-μm pseudomorphic GaAs HEMT modelis reported to support proposed theories