A 2.4 GHz Ultra-Low-Power Current-Reuse CG-LNA With Active ${\rm G}_{\rm m}$ -Boosting Technique

An ultra-low-power common-gate low noise amplifier (CG-LNA) for 2.4 GHz wireless sensor network (WSN) applications is proposed in this letter. The current-reuse and active
$g_{\rm m}$
-boosting techniques are utilized. The analysis, design method and measurement results are shown. An implemented prototype using 0.18
$\mu$
m CMOS technology is evaluated using on-wafer probing. Measurements also show a gain of 14.7 dB and an
${\rm IIP}_{3}$
of 2 dBm at 2.44 GHz. The measured noise figure is 4.8 dB at 2.44 GHz.
${\rm S}_{11}$
is below
${-}18$
dB from 2–3 GHz. The proposed LNA consumes 0.58 mW from 1.8 V dc supply.