A 76.5-92.6 GHz CMOS LNA Using Two-Port kQ-Product Theory for Transformer Design

A 76.5-92.6 GHz CMOS LNA Using Two-Port kQ-Product Theory for Transformer Design

Zhang, Youming (Southeast University)
Wei, Zhennan (Southeast University)
Tang, Xusheng (Southeast University)
Zhang, L. (TU Delft Electronics; Southeast University)
Huang, Fengyi (Southeast University)

2022

This letter presents a convenient approach based on the two-port kQ-product theory to analyze the influence of interwinding capacitive coupling on the efficiency of the transformer. It is demonstrated that a transformer with proper size can benefit from the interwinding capacitive coupling to maximize its efficiency at a desired frequency. The proposed design approach is used in a W-band low-noise amplifier (LNA) fabricated with the 40-nm CMOS process to optimize the insertion loss of the input transformer-based balun. Thanks to the approach, the W-band LNA achieves a minimum noise figure of 5.7 dB, a maximum gain of 18.5 dB, and a 3-dB bandwidth of 76.5-92.6 GHz, while consuming 23.4 mW from a 0.9-V supply.

Baluns
Couplings
Gain
kQ-product
low-noise amplifier
millimeter-wave (mmWave)
Noise measurement
Semiconductor device measurement
transformer
Transformers
W-band.
Windings

http://resolver.tudelft.nl/uuid:116b6ded-f17d-40ca-bbf4-45ca8152ba93

https://doi.org/10.1109/LMWC.2022.3170929

2023-07-01

1531-1309

IEEE Microwave and Wireless Components Letters, 32 (10), 1187-1190

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 Youming Zhang, Zhennan Wei, Xusheng Tang, L. Zhang, Fengyi Huang