Design and Dosimetric Characterization of a Broadband Exposure Facility for In Vitro Experiments in the Frequency Range 18-40.5 GHz

Abstract

Overview

A novel exposure facility designed for cellular exposure to frequencies pertinent to future 5G technologies, specifically within the 18-40.5 GHz range, is introduced.

Findings

• The apparatus allows for controlled experiments using 27 and 40.5 GHz on human dermal fibroblasts and keratinocytes within 60 mm petri dishes.
• System capabilities include:
  • Randomized and blinded sham and active exposures
  • Adaptable incident power flux densities
  • Continuous temperature monitoring without disrupting standard in vitro protocols
• Specific absorption rates (SAR) achieved are 115 W/kg at 27 GHz and 160 W/kg at 40.5 GHz per watt of antenna input, demonstrating considerable EMF exposure.
• Resulting power densities at the base of the cell monolayer stand at 65 W/m² at 27 GHz and 70 W/m² at 40.5 GHz per watt of antenna input.

Conclusion

This specialized facility is crucial for assessing the safe use of electromagnetic fields in medical and technological applications, by enabling precise control and measurement of EMF effects on biological samples. The ability to ascertain high SAR values alongside detailed exposure metrics underlines potential risk factors associated with EMF exposure that need continued investigation.