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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.
