Abstract:
Metasurfaces has gained fascinating interest of researchers for radar cross-section (RCS) reduction
applications. Cross polarization conversion metasurfaces and absorptive metasurfaces are widely
used for RCS reduction. Passive metasurfaces exhibit single functionality at the required frequency
band. Many multi-functional metasurface are proposed to achieve multiple functionalities at
different frequencies. Comparative to conventional techniques of absorption, the metasurface
offers compact size but narrow bandwidth. Generally, conventional absorptive metasurfaces can
perform maximum absorption of 0.8 GHz bandwidth. Several absorptive structures are proposed
where different absorptive resonators are integrated to achieve absorption at multiple distinct
frequencies. Moreover, several research papers are focused on bandwidth enhancement of
absorptive metasurfaces and researchers are pushing the boundaries of electromagnetic wave
absorption in metasurfaces by employing lumped elements, complex multilayered structures, and
inclusion of spacers in design techniques. However, achieving wider absorption bandwidth solely
through lumped elements, without multilayer structures, remains an avenue for in-depth study
especially if impinging is required to be absorbed at different incident angles. Thus, in this research
single layer wide-band absorptive metasurface will be presented. The design will exhibit novelty
in terms of structure, bandwidth and Angular Stability. The proposed design exhibits uniqueness
in terms of structure, size and absorption ratio. The proposed single layer structure offers
absorption greater than 80 %. The design is also angular stable for absorption up to 60 degree. The
design has significant applications for scattering and absorption for RCS reduction techniques.
