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A GaAs monolithic 6 GHz low-noise amplifier for satellite receivers

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1 Author(s)
Mott, R.C. ; Comsat Lab., Clarksburg, MD, USA

A design approach and accurate modeling techniques developed to realize a GaAs monolithic, 6-GHz, two-stage, low-noise amplifier (LNA) with a measured 1.7 dB noise figure and associated 21 dB gain are discussed. This self-biased LNA design, with chip dimensions of 80 mil×135 mil, utilizes an ion-implantation FET model which predicts measured in-band amplifier gain to within 0.5 dB and peak frequency response to within 4%. The derived noise parameter estimation process, which uses a Gaussian elimination technique to predict the measured noise figure to within 0.2 dB, reduces a set of complex, binomial equations to simple relationships which are easily programmable. A deep-recessed gate realization of this LNA design demonstrates that LNA low-noise performance is achievable under FET saturated drain current conditions

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:37 ,  Issue: 3 )