Summary of Measurements of Permittivities and Permeabilities of Some MicrowaveAbsorbing Materials

摘要

This report presents results of measurements of permittivities and permeabilitiesof assorted materials collected by the U.S. Army Office of Low Observables Technology and Applications (LOTA), and by the U.S. Army Materials Technology Laboratory (MTL). This will be one of a planned series of annual reports prepared by MTL for LOTA describing the results of such tests. The samples fell into the following categories: (1) Pure materials (teflon, plexiglasses and casting plastic); (2) Metal-coated microspheres; (3) Carbospheres, both uncoated and metal coated; (4) Ferrites; (5) Magnetic metal flake; (6) Ceramic matrix composites; and (7) A standard paint. The data and its limitations and plans for additional testing are presented in the text. The most interesting results were obtained for a Rockwell Ferrite and for a 50/50 ferronickel flake which showed magnetic loss from 2 to 18 GHz. (RH)