An 8GHz multi-beam spatio-spectral beamforming receiver using an all-passive discrete time analog baseband in 65nm CMOS

A novel multi-frequency beamforming front-end is proposed. The proposed front-end allows for simultaneous and independent steering of multiple frequency beams. As proof of concept, an 8GHz 2-channel, 4-frequency phased array beam-former is designed and implemented in 65nm CMOS. The IF signal on each...

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Bibliographic Details
Main Authors: Patnaik, S., Kalia, S., Sadhu, B., Sturm, M., Elbadry, M., Harjani, R.
Format: Conference Proceeding
Language:English
Subjects:
Array signal processing
Baseband
Frequency measurement
Mixers
Radio frequency
Receivers
Vectors
Online Access:Request full text
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Summary:A novel multi-frequency beamforming front-end is proposed. The proposed front-end allows for simultaneous and independent steering of multiple frequency beams. As proof of concept, an 8GHz 2-channel, 4-frequency phased array beam-former is designed and implemented in 65nm CMOS. The IF signal on each channel is frequency split using an all passive 4-point analog FFT. The orthogonal frequency outputs are then beam steered using an all passive I-Q vector combiner. The RF circuit draws 22.8mA from a 1.2V supply while the analog baseband consumes 9pJ/conv. (135μW at 120MSps).
ISSN:0886-5930
2152-3630
DOI:10.1109/CICC.2012.6330615