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A Four-Channel Beamforming Down-Converter in 90-nm CMOS Utilizing Phase-Oversampling
2010
IEEE Journal of Solid-State Circuits
In this paper, a 4-GHz, four-channel, analog-beamforming direct-conversion down-converter in 90-nm CMOS is presented. Down-converting vector modulators (VMs) in each channel multiply the inputs with complex beamforming weights before summation between the different channels. The VMs are based on a phase-oversampling technique that allows the synthesis of inherently linear, high-resolution complex gains without complex variable gain amplifiers. A bank of simple passive mixers driven by a
doi:10.1109/jssc.2010.2063971
fatcat:4cakiltpaba57emyexyz6tw3z4