A synergistic design model for ultrathin broadband microwave absorbers using electromagnetic frequency dispersion coefficients.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41720784.
- Also identified by DOI 10.1038/s41467-026-69591-x and PMC identifier 13036068.
- Licence recorded as CC BY-NC-ND.
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Abstract
Ultrathin, broadband microwave absorbing materials (MAMs) are crucial for weight-sensitive and space-constrained applications. This study introduces the electromagnetic frequency dispersion coefficient (EFDC), a synergistic dielectric-magnetic parameter that moves beyond conventional complex mechanisms. Our model directly links EFDC to microwave absorption (MA) performance, guiding the design of advanced MAMs. By optimizing EFDC, we achieved an ultra-wide effective absorption bandwidth (EAB) of 7.04 GHz at 1 mm and 9.28 GHz at 1.3 mm. Moreover, the temperature invariance of EFDC ensures consistent MA performance from 298 K to 473 K, despite the differing thermal responses of permittivity and permeability. This principle outlines a systematic design strategy for fabricating ultrathin and broadband MAMs, establishing a robust framework for developing high-attenuation absorbers suitable for complex frequency and thermal environments.