A lightweight fiber composite curved metastructure electromagnetic wave absorber with angular stability

Le résumé fourni par la source

Abstract In recent years, electromagnetic wave technology has been developing continuously, multifunctional structures with excellent wave absorbing properties and mechanical properties at the same time are hot research topic. Honeycomb wave-absorbing materials have excellent microwave absorption properties and mechanical properties. However, the existing honeycomb wave absorbing materials have problems such as poor wave absorbing ability at large angles and difficult to apply on curved surfaces. In order to solve the problems of electromagnetic wave absorption on curved surfaces and electromagnetic wave absorption incident at large angles, composite curved metastructure electromagnetic wave absorber (CCMEWA) based on reinforced glass fiber composites are designed. The full-band radar cross section (RCS) simulation of the designed CCMEWA shows that this structure has excellent RCS reduction capability in the range of 2–18 GHz, and the full-angle incidence simulation at the reduced peak frequency point reveals that this structure has excellent angular stability, so the 60° and 120° centroidal angle structures have been fabricated through screen-printing and inlay-locking techniques. The experimental results obtained match the simulation results. CCMEWA with 120° centroidal angle absorbs stably in the range of −60°–60° wide incidence angle, and its own curved-wall structure can solve the problem of wave absorption on curved surface, which provides a new reference to solve for the problem of electromagnetic wave absorption on curved surfaces and large angles.

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