Authors: Capstick, M.; Aeschbacher, A.; Chitnis N.; Christ, A.; Pich-Bavastro, C.; Su, Z.; Gaide, O.; Samaras, T.; Kuster, N.
BioEM 2025, 22 – 27 June 2025, Rennes, France.
Abstract
With the rollout of 5G in frequency range 2 (FR2) mm-wave in the 26.5 to 30 GHz range in various
countries as well as a raft of EU projects addressing health risks of 5G FR2 there is a requirement to
enhance the knowledge base on skin reflection properties. In 2021 an extensive study was published by
Christ et al, however, the lowest measurement frequency was 40 GHz, this is above the highest mm-wave
5G frequencies currently in use. This study fills in the gap presenting reflection measurements from 14 to
42 GHz. The knowledge is of importance in the conversion from incident power density to absorbed
power density and in many measurement applications and phantoms for over the air performance
measurement. In addition to reflection measurements optical coherence tomography was performed on
the same skin areas to allow accurate geometric skin models to be generated for use in the accompanying
simulations enabling extraction of skin layer dielectric properties.