Low-Noise Amplifier with Wideband Feedforward Linearisation for Mid-Band 5G Receivers

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Abstract

This paper proposes a wideband linearisation
technique for third-order intercept point (IP3) improvement in
low noise amplifiers (LNAs). The proposed LNA is designed
for mid-band 5G (3-4GHz) wireless receivers and it is based
on a cascode topology. An auxiliary transistor provides a
feedforward correction path for third-order intermodulation
(IM3) cancellation. The effects of the second harmonic on the IM3
are also considered in the modelling. Theoretical and simulation
analysis of the circuit result in a DC power consumption of
306mW from a supply voltage of 3V, an OIP3 of 30.8dBm, noise
figure (NF) of 0.94dB and 13.8dB of power gain are obtained.
The LNA is simulated for a hybrid circuit implementation using
a 400um GaAs packaged transistor.
Original languageEnglish
Title of host publication2020 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Electronic)978-1-7281-9396-0
ISBN (Print)978-1-7281-9397-7
DOIs
Publication statusPublished - 29 Dec 2020

Keywords

  • Wideband
  • Transistors
  • Logic gates
  • Linearity
  • Topology
  • Noise measurement
  • Radio frequency
  • Cascode
  • feedforward
  • fifth-generation (5G)
  • linearisation
  • low noise amplifier
  • third-order intercept point (IP3)
  • third-order intermodulation (IM3)

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