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Measuring the Dielectric Properties of Phantom Materials

Application Notes

Phantoms (designed objects that simulate various constants of biological tissues) have been widely used for antenna characteristic evaluation and specific absorption rate (SAR) measurements for mobile handsets and other wireless communication devices. There are international test standards for SAR measurements to protect human health and safety such as IEC 62209. The test standards require measuring dielectric properties of the phantom material, such as relative permittivity and conductivity, prior to testing SAR. Phantoms are also increasingly required for a variety of medical research purposes such as microwave imaging to detect breast cancers. It uses the difference of microwave reflectivity between normal tissue and cancer tissue due to different dielectric properties. Researchers need to verify that the dielectric properties of phantom materials are equivalent to that of biological tissues for getting precise test data.

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