73 GHz pHEMT pumped transconductance RX Mixer with low local oscillator drive power

Ball, E.A. orcid.org/0000-0002-6283-5949 and Joseph, S.D. (2026) 73 GHz pHEMT pumped transconductance RX Mixer with low local oscillator drive power. In: Proceedings of 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 17-22 Aug 2025, Helsinki, Finland. Institute of Electrical and Electronics Engineers (IEEE). ISBN: 9798350378849. ISSN: 2162-2027. EISSN: 2162-2035.

Abstract

Future mmWave mobile architectures will benefit from low power RF circuits and systems. In this work we propose two pumped transconductance balanced mixers requiring low LO drive power and DC power. The mixers operate at circa 73 GHz RF and 70 GHz LO. A 90-degree hybrid is used on the input to simplify input matching. Off-chip IF matching is implemented on a test PCB. We observe a conversion gain of -17 dB for an LO power of -10 dBm, with a DC current of 1.3 mA and an IP1dB of - 3.3 dBm for one of the prototypes. LO powers down to -20 dBm are also potentially viable, if greater loss can be accepted.

Metadata

Item Type:	Proceedings Paper
Authors/Creators:	Ball, E.A. https://orcid.org/0000-0002-6283-5949 Joseph, S.D.
Copyright, Publisher and Additional Information:	© 2025 The Author(s). Except as otherwise noted, this author-accepted version of a conference paper published in Proceedings of 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) is made available via the University of Sheffield Research Publications and Copyright Policy under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/
Dates:	Accepted: 23 May 2025 Published (online): 14 January 2026 Published: 14 January 2026
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > School of Electrical and Electronic Engineering
Funding Information:	Funder Grant number UK Research and Innovation MR/T043164/1
Date Deposited:	20 Jun 2025 09:30
Last Modified:	16 Jan 2026 11:57
Status:	Published
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
Refereed:	Yes
Identification Number:	10.1109/IRMMW-THz61557.2025.11319863
Related URLs:	Conference
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:228085

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73 GHz pHEMT pumped transconductance RX Mixer with low local oscillator drive power

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