Title :
5-6 GHz SiGe active I/Q subharmonic mixers with power supply noise effect characterization
Author :
Svitek, Richard ; Raman, Sanjay
Author_Institution :
Wireless Microsystems Lab., State Univ., Blacksburg, VA, USA
fDate :
7/1/2004 12:00:00 AM
Abstract :
A 5-6 GHz active subharmonic I/Q mixer pair has been designed and fabricated for use in direct conversion receivers for the Unlicensed National Information Infrastructure (U-NII) bands. The design includes I and Q subharmonic mixers and an LO conditioning chain. All circuits are fully differential and are designed to operate from a 3.3 V supply. Each mixer consumes 5 mA of current. A conversion gain of 6 dB, an IIP2 of +29 dBm and an input 1-dB compression point of -5.4 dBm were measured. The 90° phase balance between the I and Q mixer IF outputs was investigated in the presence of injected digital switching noise on the power supply lines; 90° balance was maintained over a wide range of switching waveform frequencies and amplitudes.
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; active networks; integrated circuit design; integrated circuit noise; microwave mixers; microwave receivers; oscillators; radio receivers; semiconductor materials; 3.3 V; 5 mA; 5 to 6 GHz; 6 dB; I-Q phase balance; LO conditioning chain; SiGe; Unlicensed National Information Infrastructure; active I-Q subharmonic mixers; direct conversion receivers; injected digital switching noise; power supply noise effect characterization; subharmonic mixer; switching waveform amplitudes; switching waveform frequencies; wireless LAN; Active noise reduction; Circuit noise; Frequency; Gain measurement; Germanium silicon alloys; Mixers; Noise level; Phase noise; Power supplies; Silicon germanium; I/Q phase balance; subharmonic mixer; wireless LAN;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.829252
