A high-gain low-power 2-14 GHz ultra-wide-band CMOS LNA for wireless receivers

摘要

In this paper, a 2-14 GHz CMOS LNA for ultra-wide-band (UWB) wireless systems is presented. To achieve a good and flat high power gain along with a low noise figure and a high input return loss, the proposed LNA adopts a capacitive cross-coupling common-gate (CG) topology with extra cascaded transistors and inductance. Over the entire 2-14 GHz bandwidth, it exhibits a return loss less than -10 dB and a small-signal gain of 9 dB. With an input intercept point of -3 dBm at 5 GHz, it consumes only 9 mW from a 1.5 V supply voltage.