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ABSTRACT: 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 x2 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° 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 literature
Radio Frequency Integrated Circuits (RFIC) Symposium, 2002 IEEE; 02/2002
