A Comparative Study of Skin Phantoms for Microwave Applications

Area of Science:

• Biomedical Engineering
• Materials Science
• Medical Device Development

Background:

• Accurate simulation of human skin is crucial for developing and testing microwave-range medical devices.
• Dielectric properties of skin-mimicking materials must closely match those of actual human tissue across relevant frequencies.

Purpose of the Study:

• To investigate and compare the dielectric properties of three different skin-mimicking phantom materials.
• To assess the suitability of these materials as human skin substitutes in microwave applications.

Main Methods:

• Dielectric properties of three phantom materials were measured in both thick block and 2-mm sheet forms.
• Measurements were conducted across various microwave frequencies.
• Results were compared against established human skin tissue dielectric property data from literature.

Main Results:

• All tested phantom materials exhibited lower dielectric properties compared to the human skin reference.
• The suitability of each phantom varied depending on the specific frequency range of the medical device.
• 2-mm thin layers of the phantoms demonstrated acceptable dielectric properties for microwave applications.

Conclusions:

• While not identical to human skin, the evaluated phantom materials can serve as effective substitutes in microwave applications, particularly when used in thin (2-mm) layers.
• Material selection should consider the target frequency range of the medical device.
• Further research may focus on optimizing phantom compositions for closer dielectric property matching.