ArticleScientific reports2026
Guidance and absorption of internal energy in Vivaldi antennas using multiple slots, full-band dividers, metamaterials, and distributed resistors.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In traveling-wave planar-technology antennas, only a certain portion of excitation energy contributes to expected radiation. The remaining significant portion, referred to as residual electromagnetic (EM) energy, has negative effects on overall antenna performance. A systematic design methodology to mitigate such degradation is presented in this paper. The design approach is based on an analysis of structural scattering and radiation mechanism, supported by near-field and partition far-field characterizations. The design process involves the arrangement of primary antenna scattering sections into a form of multi antipodal Vivaldi slots; the identification of desired and undesired EM flows of internal EM energy; the adjustment of radiation flows using inhomogeneous metamaterial structures; and the guidance and absorption of residual energy through dissipation paths with distributed resistors. The effectiveness of the method is demonstrated by the high-gain and wideband antenna performance. Additionally, novel full-band power dividers are proposed to efficiently feed both individual antenna and array.
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