An active SiGe sub-harmonic direct-conversion receiver front-end design for 5-6 GHz band applications

This paper describes a packaged SiGe RF front-end design for use in the Unlicensed National Information Infrastructure (U-NII) bands. The front-end is based on a sub-harmonic direct-conversion architecture and is composed of an LNA, I and Q /spl times/2 sub-harmonic mixers (SHMs), and an LO conditioning chain. The receiver is completely differential and is designed for operation from a 3.3 V supply. Simulated performance shows >25 dB conversion gain, 6.8 dB noise figure (cascode LNA), 0/spl deg/ I/Q phase imbalance, and 39.1 mA total current consumption. To the authors' knowledge, this is the first 5-6 GHz SiGe active sub-harmonic direct-conversion receiver design presented in the literature.

[1]  Sanjay Raman,et al.  A packaged SiGe x2 sub-harmonic mixer for U-NII band applications , 2001, Proceedings of the 2001 BIPOLAR/BiCMOS Circuits and Technology Meeting (Cat. No.01CH37212).

[2]  Asad A. Abidi,et al.  CMOS mixers and polyphase filters for large image rejection , 2001, IEEE J. Solid State Circuits.

[3]  G.M. Rebeiz,et al.  A 1.9 GHz double-balanced subharmonic mixer for direct conversion receivers , 2001, 2001 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium (IEEE Cat. No.01CH37173).

[4]  Joy Laskar,et al.  A compact direct conversion receiver for C-band wireless applications , 1999, 1999 IEEE Radio Frequency Integrated Circuits Symposium (Cat No.99CH37001).

[5]  A. Abidi.  Direct-conversion radio transceivers for digital communications , 1995, Proceedings ISSCC '95 - International Solid-State Circuits Conference.

[6]  L. Larson,et al.  A wide-bandwidth Si/SiGe HBT direct conversion sub-harmonic mixer/downconverter , 2000, IEEE Journal of Solid-State Circuits.