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A material having a matrix and a plurality of inclusions which are chiral is effective as a coating to reduce incident reflections and absorptions of microwave frequency electromagnetic energy. The matrix can use an electrically conductive polymeric material as the base as well as any other low loss

A material having a matrix and a plurality of inclusions which are chiral is effective as a coating to reduce incident reflections and absorptions of microwave frequency electromagnetic energy. The matrix can use an electrically conductive polymeric material as the base as well as any other low loss dielectric material. Chiral inclusions may be in the form of helices or any other small object displaying handedness. Moreover, it is possible to use electrically conductive polymeric materials by themselves as absorbers of electromagnetic energy. There are a variety of uses for these materials and the unique properties including gaskets for controlling the emission of microwave energy from electronic enclosures.

대표청구항 ▼

A composite material comprising: a base material having a first dielectric constant which is complex in the frequency range of 150 megahertz to 100 gigahertz, and being at least partially opaque to electromagnetic energy with frequencies in the range of 150 megahertz to 100 gigahertz; and a chiral m

A composite material comprising: a base material having a first dielectric constant which is complex in the frequency range of 150 megahertz to 100 gigahertz, and being at least partially opaque to electromagnetic energy with frequencies in the range of 150 megahertz to 100 gigahertz; and a chiral material having handedness, having a second dielectric constant which is different from the first dielectric constant, and being dispersed throughout the base material.