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Title: S-band low noise amplifier using 1 μm InGaAs/InAlAs/InP pHEMT
Authors: Z. Hamaizia
N. Sengouga
M. C. E. Yagoub
M. Missous
Keywords: HEMT; InGaAs; InP; SKADS; telescope; LNA
Issue Date: 18-Apr-2014
Abstract: This paper discusses the design of a wideband low noise amplifier (LNA) in which specific architecture decisions were made in consideration of system-on-chip implementation for radio-astronomy applications. The LNA design is based on a novel ultra-low noise InGaAs/InAlAs/InP pHEMT Linear and non-linear modelling of this pHEMT has been used to design an LNA operating from 2 to 4 GHz. A common-drain in cascade with a common source inductive degeneration, broadband LNA topology is proposed for wideband applications. The proposed configuration achieved a maximum gain of 27 dB and a noise figure of 0.3 dB with a good input and output return loss (S11 < −10 dB, S22 < −11 dB). This LNA exhibits an input 1-dB compression point of −18 dBm, a third order input intercept point of 0 dBm and consumes 85 mW of power from a 1.8 V supply. Link
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