A two-stage 2.5-5 GHz monolithic low-noise amplifier (LNA) has been fabricated using 0.5-μm enhanced mode AlGaAs/GaAs pHEMT technology.To achieve wide operation bandwidth and low noise figure,the proposed LNA uses a wideband matching network and a negative feedback technique.Measured results from 2.5 to 5 GHz demonstrate a minimum of 2.4-dB noise figure and 17-dB gain.The input and output return loss exceeded-10-dB across the band.The Power consumption of this LNA is 33 mW.According to the author's knowledge,this is the lowest power consumption LNA fabricated in 0.5-μm A1GaAs/GaAs pHEMT with the comparable performance.
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