Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Low Noise and High Linearity GaAs LNA MMIC with Novel Active Bias Circuit for LTE Applications

  • Ryu, Keun-Kwan (Department of Electronics and Control Engineering, Hanbat National University) ;
  • Kim, Yong-Hwan (RFIC/MMIC Research Group, WaveTrack Inc.) ;
  • Kim, Sung-Chan (Department of Electronics and Control Engineering, Hanbat National University)
  • Received : 2017.04.28
  • Accepted : 2017.05.29
  • Published : 2017.06.30
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Abstract

In this work, we demonstrated a low noise and high linearity low noise amplifier (LNA) monolithic microwave integrated circuit (MMIC) with novel active bias circuit for LTE applications. The device technology used in this work relies on a process involving a $0.25-{\mu}m$ GaAs pseudomorphic high electron mobility transistor (PHEMT). The LNA MMIC with a novel active bias circuit has a small signal gain of $19.7{\pm}1.5dB$ and output third order intercept point (OIP3) of 38-39 dBm in the frequency range 1.75-2.65 GHz. The noise figure (NF) is less than 0.58 dB over the full bandwidth. Compared with the characteristics of the LNA MMIC without using the novel active bias circuit, the OIP3 is improved about 2-3 dBm. The small signal gain and NF showed no significant change after using the active bias circuit. The novel active bias circuit indeed improves the linearity performance of the LNA MMIC without degradation.

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References

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