Abstract
A technique for modulating the directional characteristics of the target’s infrared signatures based on the anisotropic emission behavior of the target surface is proposed. The integrated infrared transmission model from target to detector is established by matrices. Through the single-, multi-, and omni-directional infrared signature optimization analyses, the effectiveness of the proposed modulation technique is demonstrated and the following conclusions were reached: 1) Because the hemispherical emissivity remains constant, modulating the angular emission patterns of the target surface can enhance or reduce the target’s infrared signature level received by the detector. 2) It is possible to adjust the directionality of infrared signatures by virtue of anisotropic emission behavior, generating appreciable peak signals in the desired directions or reducing the infrared signals in the infrared -threatening directions. 3) The optimizing effects upon the directionality of infrared signatures are highly dependent on the geometric features of target and hemispherical emissivity: the smaller the hemispherical emissivity is, the better the effects are.
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