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Millimeter-Wave Near-Field Probe Designed for High-Resolution Skin Cancer Diagnosis
KTH, School of Electrical Engineering (EES), Micro and Nanosystems.
KTH, School of Electrical Engineering (EES), Micro and Nanosystems.
KTH, School of Electrical Engineering (EES), Micro and Nanosystems.
2015 (English)In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 63, no 6, 2050-2059 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a detailed technical characterization of a micromachined millimeter-wave near-field probe developed for skin cancer diagnosis. The broadband probe is optimized for frequencies from 90 to 104 GHz and consists of a dielectric- rod waveguide, which is metallized and tapered towards the tip to achieve high resolution by concentrating the electric field in a small sample area. Several probes with different tip sizes were fabricated from high-resistivity silicon by micromachining and were successfully characterized using silicon test samples with geometry- defined tailor-made permittivity. The probes show a high responsivity for samples with permittivities in the range of healthy and cancerous skin tissue at 100 GHz (from 3.2 - j2.3 to 7.2 - j8.0, loss tangent of approximately 1.26). The sensing depth was determined by simulations and measurements from 0.3 to 0.4 mm, which is adapted for detecting early-stage skin tumors before they metastasize. The lateral resolution was determined to 0.2 mm for a tip size of 0.6 x 0.3 mm, which allows for resolving small skin tumors and inhomogeneities within a tumor.

Place, publisher, year, edition, pages
2015. Vol. 63, no 6, 2050-2059 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-170690DOI: 10.1109/TMTT.2015.2428243ISI: 000355930300027Scopus ID: 2-s2.0-84958103391OAI: oai:DiVA.org:kth-170690DiVA: diva2:840243
Note

QC 20150707

Available from: 2015-07-07 Created: 2015-07-03 Last updated: 2017-12-04Bibliographically approved

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Töpfer, FritziDudorov, SergeyOberhammer, Joachim
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