title: Electromagnetic field tapering using all-dielectric gradient index materials.
abstract: The concept of transformation optics (TO) is applied to control the flow of electromagnetic fields between two sections of different dimensions through a tapering device. The broadband performance of the field taper is numerically and experimentally validated. The taper device presents a graded permittivity profile and is fabricated through three-dimensional (3D) polyjet printing technology using low-cost all-dielectric materials. Calculated and measured near-field mappings are presented in order to validate the proposed taper. A good qualitative agreement is obtained between full-wave simulations and experimental tests. Such all-dielectric taper paves the way to novel types of microwave devices that can be easily fabricated through low-cost additive manufacturing processes.
authors.affiliation: State Key Laboratory of Integrated Services Networks, Xidian University, 710071 Xi'an, Shaanxi, China.|Centre de Nanosciences et de Nanotechnologies, CNRS, Univ Paris Sud, Université Paris-Saclay, C2N-Orsay, 91405 Orsay cedex, France.
authors.forename: Jianjia
authors.initials: J
authors.lastname: Yi
authors.affiliation: AIRBUS Group Innovations, 92150 Suresnes, France.
authors.forename: Gérard-Pascal
authors.initials: GP
authors.lastname: Piau
authors.affiliation: Centre de Nanosciences et de Nanotechnologies, CNRS, Univ Paris Sud, Université Paris-Saclay, C2N-Orsay, 91405 Orsay cedex, France.|Université Paris Ouest, 92410 Ville d'Avray, France.
authors.forename: André
authors.initials: A
authors.lastname: de Lustrac
authors.affiliation: LEME, EA 4416, Université Paris Ouest, 92410 Ville d'Avray, France.
authors.forename: Shah Nawaz
authors.initials: SN
authors.lastname: Burokur