110 GHz broadband measurement of permittivity on human epidermis using 1 mm coaxial probe

Hyeonseok Hwang, Jounghwa Yim, Jei Won Cho, Changyul Cheon, Youngwoo Kwon

Research output: Contribution to journalConference articlepeer-review

44 Scopus citations

Abstract

In this work, we have characterized permittivity of human epidermis (the epidermis: the outer skin layer) using microwave up to 110GHz. A one mm-diameter coaxial probe was adopted to increase measuring bandwidth as well as to enhance the spatial resolution. Pork was used to discriminate the permittivities between muscle tissues and fat tissues. The influence of the sample thickness was also studied. Considering several factors, the permittivity was measured on epidermis of the human palm and the wrist. In addition, a relaxation phenomenon observed in the wrist skin, revealed by Cole-Cole parameters, suggested that it originated from high water content beneath thin epidermis of the wrist skin. A relaxation phenomenon revealed by Cole-Cole parameters was observed in the wrist skin. This explains that high water content cells exist beneath thin epidermis of the wrist skin.

Original languageEnglish
Pages (from-to)399-402
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
Volume1
StatePublished - 2003
Event2003 IEEE MTT-S International Microwave Symposium Digest - Philadelphia, PA, United States
Duration: 8 Jun 200313 Jun 2003

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