Electromagnetic properties of carbon-based high-efficiency broadband absorbing sponges

Le résumé fourni par la source

Abstract Research on the need for the electromagnetic properties of absorbing sponges is needed. Water-based absorbing coatings were prepared through carbon-based complex absorbents and acrylic emulsion. It was used to optimize spraying parameters by controlling the ratio and the spraying process. The Electromagnetic properties of the absorbing materials are effectively regulated by controlling the weight of the absorbing sponges and flexibly designing the spraying shapes and spraying areas on the flame-retardant sponges. So, the lightweight and broadband polyurethane flexible absorbing sponges of different thicknesses were prepared. In the (8-18) GHz radar band, the radar reflectivity of the absorbing sponges with a thickness of 8 mm is less than -12.6 dB, and its radar reflectivity is less than -22.5 dB in the (26.5-40) GHz radar band. Its broadband absorption performance is optimal. Polyurethane flexible absorbing sponges have excellent environmental resistance. It can be applied to complex components to reduce the radar cross-section.

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