A Fully-Integrated Near-Field Sensor for Permittivity-Based Imaging

Sadkaoui, H., Du, X., Hillger, P. et al. (7 more authors) (2026) A Fully-Integrated Near-Field Sensor for Permittivity-Based Imaging. 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). ISSN: 2162-2027. EISSN: 2162-2035.

Abstract

This paper presents a fully integrated near-field sensor for permittivity-based imaging. The sensor comprises a 32×32 pixel array, with each pixel integrating a free-running 320GHz oscillator, a split-ring resonator (SRR), and a power detector. We demonstrate, for the first time in the terahertz regime, the sensor’s ability to distinguish between tissue types in heterogeneous samples (e.g., lean muscle and fat), as well as to perform real-time dielectric fingerprinting of homogeneous materials without the need for raster scanning.

Metadata

Item Type:	Proceedings Paper
Authors/Creators:	Sadkaoui, H. Du, X. Hillger, P. Younis, H.M. Andree, M. Mosley, C.D.W. Metcalf, A.G. Valdastri, P. https://orcid.org/0000-0002-2280-5438 Cunningham, J.E. https://orcid.org/0000-0002-1805-9743 Pfeiffer, U.
Keywords:	Near-field sensing, split-ring resonator (SRR), terahertz (THz), permittivity, system-on-a-chip (SoC)
Dates:	Published (online): 14 January 2026 Published: 14 January 2026
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds)
Funding Information:	Funder Grant number EPSRC Accounts Payable EP/V004743/1 EPSRC Accounts Payable EP/M01598X/1 EPSRC Accounts Payable UKRI874 EPSRC Accounts Payable EP/P021859/1 EU - European Union 860060 EPSRC Accounts Payable UKRI1362 EPSRC Accounts Payable EP/V047914/1 EPSRC Accounts Payable EP/W028921/1
Date Deposited:	11 Feb 2026 11:17
Last Modified:	11 Feb 2026 11:17
Status:	Published
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
Identification Number:	10.1109/irmmw-thz61557.2025.11320038
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:237767

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A Fully-Integrated Near-Field Sensor for Permittivity-Based Imaging

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