Estudo dielétrico da cerâmica baseada no niobato de estrôncio e cobalto ((Sr2CoNbO6) e sua aplicação como antena ressoadora dielétrica

Abstract

Applications of ceramic dielectric in the telecommunications has been growing in recent years due to the dielectric properties presented by ceramic in RF and microwave ranges compared to metallic materials. Perovskite-type ceramics has stimulated the interest because of its features dielectric ceramic differentiated from other ceramics groups. The SCNO (Sr2CoNbO6) is a perovskite-type mixed and that will be the focus of this work. The SCNO was prepared by solid-state reaction and characterized structurally by x-ray diffraction and and their dielectric properties was measured by the method of Hakki-Coleman and impedance spectroscopy. The results obtained by x-ray diffraction confirmed that synthesis of SCNO and dielectric characterization showed that the ceramic has values of permittivity about 14 and dielectric loss in the range 1x10-2. The SCNO acting as a dielectric resonator antenna exhibited a low gain that can be improved by modifying the geometry used.