Wideband LNA in 0.18 µm CMOS Technology

This paper represents the 0.18 µm CMOS technology-based implementation of wideband (0.1 - 4 GHz) LNA for cellular services, terrestrial communication and satellite navigation. Here, a wideband operation is achieved by the design of the current reuse methodology and negative feedback between the drain and gate terminal of the device to be operated in a common source (CS) configuration. The proposed design improves the transconductance and reduces the drain current by half due to the scaling of the device geometry using the W/L ratio. The implanted design provides greater than 30 dB gain in three cascaded stages with input-output return loss better than -12 dB throughout the band and a noise figure less than 3 dB. The formulated design consumes 18 mA power from a 1.8 V source.