The Electromagnetic Properties of Materials Program at NIST

The Electromagnetic Properties of Materials (EPM) program at the National Institute of Standards and Technology (NIST) is described. An outline is presented of the current goals of the project as well as some details of measurement techniques being used at NIST for characterizing dielectric and magnetic materials at microwave frequencies. A resonant cavity method has been developed that promises to yield some of the highest accuracies attainable anywhere.<
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