The advancement of microwave radar prototypes for breast cancer detection purposes requires stable tissue-mimicking materials (phantoms) that dielectrically represent the breast tissues and allow for repeated experiments in a controlled laboratory environment. In this study, we compare the dielectric properties of three different skin phantoms to assess their suitability for prototype testing in the frequency range of 0.5–10 GHz. First, we verify the properties of two polyurethane-based fat-mimicking phantoms. Then, we evaluate the skin phantoms in larger blocks and as 2-mm thin layers. Finally, we conduct two separate experiments with the 2-mm skin phantoms layered over the two different fat phantoms. All the results are compared to dielectric properties of excised human skin tissue reported in the literature.
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