Microwave backscatter enhancement using radial anisotropy in biomimetic core-shell spheres

Enhanced backscattering of microwave radiation is demonstrated experimentally in a biomimetic radially anisotropic spherical metamaterial component. The core-shell device replicates the optical function nanospheres observed tapetum reflector compound eye shrimp Litopenaeus vannamei (Boone, 1931) and translates effect from domain to frequencies. Analytical Mie theory calculations numerical-method simulations are used describe origin scattering single dielectric sphere terms its multipolar resonances. fabrication components using additive manufacture their experimental characterization described. results show that introduction radial anisotropy shell more than doubles monostatic radar cross section compared equivalent isotropic case. This work represents practical demonstration synthetic bio-inspired structure, harnessing performance-enhancing adaptations have evolved nature. augment range techniques available for control electromagnetic with relevance applications manipulation return signals.