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An ultra-wideband CMOS low noise amplifier for 3-5-GHz UWB system

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5 Author(s)
Chang-Wan Kim ; Inf. & Commun. Univ., Daejeon, South Korea ; Min-Suk Kang ; Phan Tuan Anh ; Hoon-Tae Kim
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An ultra-wideband (UWB) CMOS low noise amplifier (LNA) topology that combines a narrowband LNA with a resistive shunt-feedback is proposed. The resistive shunt-feedback provides wideband input matching with small noise figure (NF) degradation by reducing the Q-factor of the narrowband LNA input and flattens the passband gain. The proposed UWB amplifier is implemented in 0.18-μm CMOS technology for a 3.1-5-GHz UWB system. Measurements show a -3-dB gain bandwidth of 2-4.6GHz, a minimum NF of 2.3 dB, a power gain of 9.8 dB, better than -9 dB of input matching, and an input IP3 of -7dBm, while consuming only 12.6 mW of power.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:40 ,  Issue: 2 )

Date of Publication:

Feb. 2005

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