Brandt, JuliaJuliaBrandtRenner, HagenHagenRennerLanger, DominikDominikLangerEich, ManfredManfredEichKölpin, AlexanderAlexanderKölpinPetrov, AlexanderAlexanderPetrov2025-09-092025-09-092025-0715th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2025https://hdl.handle.net/11420/57397In this paper, we study how a cylindrical shell made from a radially anisotropic material can modify the electric field inside an isotropic core, either by enhancing or suppressing it. We present a water-air metamaterial that enhances electric fields by 10 dB across a broad frequency range.enTechnology::621: Applied Physics::621.3: Electrical Engineering, Electronic EngineeringConference PaperConference Paper