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Enhancing Continuous Beam Angle Resolution for Next Generation Wireless Systems: A Multi-Stage Phase-Shifting Polyphase Filters Approach

Authors :
Slater, Adam
Abbasi, Hesam
Poolakkal, Sreeni
Beheshti, Foad
Gupta, Subhanshu
Source :
Circuits and Systems I: Regular Papers, IEEE Transactions on; November 2024, Vol. 71 Issue: 11 p5200-5210, 11p
Publication Year :
2024

Abstract

Increasing user density and capacity in next-generation systems presents a need for fine beam angle resolution especially in the emerging upper mid-band <inline-formula> <tex-math notation="LaTeX">$7-24$ </tex-math></inline-formula> GHz frequency regime. This paper presents a scalable area- and energy-efficient quadrature generator targeted for beamforming receivers with a multi-stage phase-shifting polyphase filter providing continuous beam angle resolution. When complemented with vector modulation for coarse tuning, a phase range of 360° is achieved realizing a phase-shifter-less implementation leveraging slice-based receiver architecture and polyphase filters. Fabricated in 65nm CMOS, the phase-shifting polyphase filter occupies 0.003 mm2, consumes 0.25 mW, and achieves an Image Rejection Ratio >58 dB over the entire phase range. The quadrature generator is demonstrated with a proof-of-concept receiver array operating between 7.28-7.78 GHz consuming 37 mW per element occupying 1.26 mm2.

Details

Language :
English
ISSN :
15498328 and 15580806
Volume :
71
Issue :
11
Database :
Supplemental Index
Journal :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publication Type :
Periodical
Accession number :
ejs67818427
Full Text :
https://doi.org/10.1109/TCSI.2024.3425861