Synergistic modulation of Fano resonance and plasmonic effect for broadband widening of electromagnetic transparency window under wide-angle TE polarization.

To address the inherent limitations of traditional dielectric half-wave wall electromagnetic windows, including low transmission efficiency, narrow operating bandwidth, and poor angular robustness under large-angle transverse electric (TE) polarized incidence, this paper proposes a high-performance wave-transparent structure based on the synergistic regulation of Fano resonance and plasmonic effects. The proposed structure enables wideband, large-angle, and high-efficiency electromagnetic transmission through dielectric half-wave wall windows. The steep frequency-domain response characteristic of Fano resonance is exploited to broaden the operating bandwidth, while the plasmonic effect is simultaneously leveraged to precisely tailor the effective electromagnetic parameters of the structure, thereby effectively compensating for the impedance mismatch induced by large-angle incidence. Both simulated and experimental results demonstrate that the proposed synergistic regulation strategy effectively overcomes the physical performance constraints of conventional half-wave wall structures, significantly improving the transmission performance of large-angle TE-polarized electromagnetic waves. This work provides a technical pathway for the high-performance design of dielectric wave-transparent windows in airborne and spaceborne radar and communication systems, exhibiting excellent engineering application value and promising potential for further extension.