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A 40-GHz bandwidth tapered distributed LNA

Nikandish, G ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/TCSII.2017.2758861
  3. Abstract:
  4. In this brief, a design technique for tapered distributed low-noise amplifiers (LNAs) is presented. A circuit model is developed for gain and noise analysis of a nonuniform distributed amplifier (DA). It is shown that by optimal tapering of gate and drain transmission lines and transistors, the tapered distributed LNA can provide lower broadband average noise figure (NF) compared to a uniform DA. A proof-of-concept integrated circuit is implemented using a 0.1-μm GaAs pHEMT process. The amplifier provides average gain of 15.2 dB and 3-dB bandwidth of 43.3 GHz. The average NF of 2.3 dB and minimum NF of 2.0 dB are achieved over 2–40 GHz. The chip consumes 55 mA current from a 2-V supply. IEEE
  5. Keywords:
  6. Broadband amplifier ; Impedance ; Lownoise amplifier (LNA) ; Noise measurement ; Nonuniform transmission line ; Resistance ; Amplifiers (electronic) ; Bandwidth ; Broadband amplifiers ; Circuit simulation ; Electric impedance ; Electric lines ; Electric resistance ; Integrated circuits ; Logic gates ; Noise figure ; Transistors ; Wave transmission ; Distributed amplifier ; Integrated circuit modeling ; Noise measurements ; Non uniform transmission lines ; Tapering ; Low noise amplifiers
  7. Source: IEEE Transactions on Circuits and Systems II: Express Briefs ; 2017 ; 15497747 (ISSN)
  8. URL: https://ieeexplore.ieee.org/document/8057261