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Wideband highly linear LNA using modified cascode for simultaneous input and noise matching technique
Author(s) -
Park Seung Pyo,
Lee MoonQue,
Lee Han Lim
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30216
Subject(s) - cascode , wideband , monolithic microwave integrated circuit , noise figure , linearity , electronic engineering , low noise amplifier , amplifier , electrical engineering , high electron mobility transistor , transistor , engineering , cmos , voltage
In this letter, a highly linear low‐noise amplifier (LNA) MMIC configured by a modified cascode structure with the operation band from 1.8 GHz to 2.8 GHz is proposed. The modified cascode structure adopts inductive degeneration and an additional transistor used for linearity enhancement and simultaneous input and noise matching. Also, the resistive feedback at the input and inductive peaking at the output are applied to ensure the stability over the wideband operation. The proposed LNA MMIC was implemented by 0.5μm GaAs pHEMT process and showed the measured input third‐order intercept point (IIP3) of 15.5 ± 1.3 dBm, gain of 16.3 ± 2.2 dB, output P 1 ‐dB of 16.7 ± 0.3 dBm and noise figure (NF) of 1 ± 0.2 dB from 1.8 GHz to 2.8 GHz . © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:15–17, 2017