Methodology for designing millimeter-wave simulants with low loss powders

A method of producing a simulant of a target threat, comprising:

• determining a component ratio by weight of the simulant for at least one component ingredient, each component ingredient having a respective component loss factor that is essentially zero, and a respective component dielectric constant;
• mixing the at least one component ingredient to produce the simulant exhibiting a simulant loss factor of essentially zero, and exhibit a simulant dielectric constant according to a component ratio of the at least one component ingredient;
• and
• mixing the at least one component ingredient to produce the simulant having a simulant reflectivity, corresponding to the simulant dielectric constant from a cumulative contribution of the component dielectric constant at the component ratio, that is substantially equivalent to the threat reflectivity.

A method of producing a simulant of a target threat having a threat reflectivity, comprising:

• identifying an ellipse-like curved solution space corresponding to a plurality of candidate threat reflectivities, wherein a given threat reflectivity is associated with a respective threat dielectric constant and threat loss factor, wherein the curved solution space is based on expressing the threat reflectivity in terms of a complex index of refraction expressed in terms of dielectric constant and loss factor;
• identifying a threat dielectric constant, from among respective threat dielectric constants of the candidate threat reflectivities forming the curved solution space, based on reducing the curved solution space to the threat dielectric constant located at an intercept of a dielectric constant axis in the ellipse-like curved solution space;
• and
• identifying at least one weight proportion of a corresponding at least one simulant ingredient based on generating an ingredient solution space corresponding to a plurality of different combinations of the at least one simulant ingredient to satisfy a Landau-Lifshitz-Looyenga (LLL) mixture equation expressed in terms of the threat dielectric and characteristics of the at least one simulant ingredient corresponding to a dielectric constant, a density, and a weight proportion of each respective simulant ingredient of the at least one simulant ingredient.