A 2.4-GHz CMOS RF front-end for wireless sensor network applications

A 2.4-GHz fully-differential RF front-end on 0.18-mum CMOS technology for wireless sensor network (WSN) applications consuming 4.8-mW from a 1.8-V supply is presented. The direct conversion RF-front end comprises of low-noise amplifier (LNA), I/Q direct-conversion mixers, quadrature LO generator and LO buffers. By employing conventional source degenerated LNA, passive mixer, to eliminate flicker noise, RC poly-phase filter for quadrature LO generation, and LO buffers employing current reuse technique, we achieve 23-dB conversion gain, 8.1-dB noise figure, -15-dBm IIP3 and better than 15-dB input return loss for the RF front-end

[1]  R. Havens,et al.  Noise modeling for RF CMOS circuit simulation , 2003 .

[2]  J. Ryynanen,et al.  2.4-GHz receiver for sensor applications , 2005, IEEE Journal of Solid-State Circuits.

[3]  D.J. Allstot,et al.  Design considerations for CMOS low-noise amplifiers , 2004, 2004 IEE Radio Frequency Integrated Circuits (RFIC) Systems. Digest of Papers.

[4]  Thomas H. Lee,et al.  The Design of CMOS Radio-Frequency Integrated Circuits: RF CIRCUITS THROUGH THE AGES , 2003 .

[5]  T. Lee,et al.  A 1.5 V, 1.5 GHz CMOS low noise amplifier , 1996 .

[6]  Ilku Nam,et al.  An experimental coin-sized radio for extremely low-power WPAN (IEEE 802.15.4) application at 2.4 GHz , 2003 .

[7]  T.H. Lee,et al.  A 1.5 V, 1.5 GHz CMOS low noise amplifier , 1996, 1996 Symposium on VLSI Circuits. Digest of Technical Papers.