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A Study on Radio Frequency Electrodes for Skin Stimulation

  • Journal of Software Forensics
  • Abbr : JSF
  • 2026, 22(3), pp.199~204
  • Publisher : Korea Software Assessment and Valuation Society
  • Research Area : Engineering > Computer Science
  • Received : September 9, 2026
  • Accepted : September 20, 2026
  • Published : September 30, 2026

Won-Hui Lee 1

1서울디지털대학교

Accredited

ABSTRACT

This study analyzed the effects of structural differences in electrodes (mono-polar and bipolar) on electromagnetic field distribution, reflection coefficient (S11), and back radiation characteristics within a 3D skin model for Radio Frequency (RF) based dermatological and cosmetic devices using Finite Element Method (FEM) computer simulations. Simulations conducted within a compact handpiece environment revealed that the bipolar structure without a reflector exhibited a local S11 minimum at approximately 3.60 GHz, whereas the mono-polar structure incorporating a ground plane showed a shift to 2.96 GHz. However, in the primary medical and cosmetic frequency range of 1 MHz to 100 MHz, both structures exhibited S11 values approaching 0 dB, indicating near total reflection and confirming that conductive ohmic heating dominates over radiation. Furthermore, the mono-polar structure with a ground plane effectively blocked backward electromagnetic power leakage, significantly improving the Front-to-Back Ratio (FBR) and focusing the electric field deep into the skin layer. These findings provide foundational design guidelines for mitigating back radiation and achieving focused electromagnetic field distributions in compact RF skin therapy devices.

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