A 0.18-/spl mu/m 2.4-6 GHz CMOS broadband differential LNA For WLAN and UWB receiver

A 2.4-6 GHz broadband CMOS differential LNA for WLAN and UWB receiver is presented. The LNA is fabricated with the 0.18 /spl mu/m 1P6M standard CMOS process. Measurement of the chip is performed on a FR-4 PCB test fixture. In the UWB low-band (3 to 5.15 GHz), the broadband LNA exhibit a gain of 17.5-18.2 dB, noise figure of 3.4-5 dB, input/output return loss better than 10 dB, and input P/sub 1dB/ of -17 dBm, respectively. In the band from 2.4 to 3 GHz (covering a 802.11b/g band), the LNA exhibit a gain of 17.5-I8 dB and noise figure less than 3.5 dB. From 5.2 to 6 GHz, the noise figure of the LNA becomes higher than 5 dB. The gain also decrease to about 15 dB. The DC supply is 1.8 V.