NDLI: Multi-beam 4 GHz microwave apertures using current-mode DFT approximation on 65 nm CMOS

Content Provider	IEEE Xplore Digital Library
Author	Ariyarathna, V. Kulasekera, S. Madanayake, A. Kye-Shin Lee Suarez, D. Cintra, R.J. Bayer, F.M. Belostotski, L.
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada (Belostotski, L.) \|\| Dept. of Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA (Ariyarathna, V.; Kulasekera, S.; Madanayake, A.; Kye-Shin Lee) \|\| Dept. de Estatistica, UFPE, Recife, Brazil (Suarez, D.; Cintra, R.J.) \|\| Dept. de Estatistica, UFSM, Brazil (Bayer, F.M.)
Abstract	A current-mode CMOS design is proposed for realizing receive mode multi-beams in the analog domain using a novel DFT approximation. High-bandwidth CMOS RF transistors are employed in low-voltage current mirrors to achieve bandwidths exceeding 4 GHz with good beam fidelity. Current mirrors realize the coefficients of the considered DFT approximation, which take simple values in {0,±1,±2} only. This allows high bandwidths realizations using simple circuitry without needing phase-shifters or delays. The proposed design is used as a method to efficiently achieve spatial discrete Fourier transform operation across a ULA to obtain multiple simultaneous RF beams. An example using 1.2 V current-mode approximate DFT on 65 nm CMOS, with BSIM4 models from the RF kit, show potential operation up to 4 GHz with eight independent aperture beams.
Starting Page	1
Ending Page	4
File Size	1192112
Page Count	4
File Format	PDF
ISBN	9781479982752
DOI	10.1109/MWSYM.2015.7167112
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Discrete Fourier transforms Approximation methods Butler matrices Mirrors CMOS integrated circuits Linear antenna arrays Approximation algorithms multi-beam Analog arrays beamforming aperture
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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