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Physical Property Sensors

Mapping RF Energy Absorption in "Tissue" (202)

Ambient Light Image of Hand Phantom Ambient Light Image of Hand Phantom

Problem: Need reliable method to map and measure RF energy absorption in people without human exposure

Project Activity Scope (from Technical Overview Chart): Mechanisms through Sensors and Devices

PNNL Solution:

  • Used active material that emits light when stimulated by absorbed RF energy (chemiluminescence, USAF collaborator development)
  • Developed optically transparent "phantoms" to fill with active material
  • Spatial distribution & intensity of emitted light showed where rf/radar beam energy is absorbed in phantom
Low-Light Image of Optical Emission from Hand Phantom
Low-Light Image of Optical Emission from Hand Phantom — Image Analysis Yields Spatial Distribution of Absorbed RF Energy

Capabilities Employed to Meet Client Needs: Low light imaging; radiometry; digital image processing; software development; radio frequency antenna design; phantom design and fabrication; optical engineering; mechanical engineering; electrical engineering including PC-based control system and data acquisition system; system integration, validation, and installation in client lab; system documentation.

Contact: Michael Lind

Sensors & Electronics

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