Silva Neto, Valdemir Praxedes daDuarte Júnior, José Garibaldi2021-03-032021-03-032020-12-28DUARTE JÚNIOR, José Garibaldi. Estudo de uma metodologia de reconfiguração aplicada no desenvolvimento de filtros planares de microondas ajustáveis. 2020. 91f. Dissertação (Mestrado em Engenharia Elétrica e de Computação) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2020.https://repositorio.ufrn.br/handle/123456789/31666Filters play an important role in many radio frequency (RF) and microwave applications. They are used to separate or combine different frequency bands. The electromagnetic spectrum is limited and needs to be shared, so the filters have the function of limiting and/or selecting microwave/RF signals within the assigned spectral limits. The reconfigurable, or tunable, microwave filters have attracted a lot of attention from researchers and designers due to their characteristics of improving spectral capacity and performance in current communication systems. This work presents a study about reconfigurable microwave planar filters. A reconfiguration methodology based on the use of semiconductor devices of the varactor diode type is proposed in order to allow the adjustment of impedances along the geometry of the filter resonator, and thus, configure the frequency response of the filtering device. The designs of three reconfigurable devices are presented, being applicable to the communication standards of 5G NR sub-6 GHz, with model 01 being a banstop filter, and models 02 and 03, bandpass filters. Studies, analyzes and simulations in a lossless transmission line and in microstrip technology are carried out using tools based on the equivalent circuit method and the ANSYS HFSS software, and the equivalent varactor diode model is also used according to its datasheet. Results obtained through laboratory measurement demonstrate a good agreement in comparison with curves obtained via simulation for both three filter models, thus demonstrating operation in several adjustable frequency ranges between 0.5 and 3 GHz according to the polarization level of the semiconductor devices. A discussion of the results is presented relating the models built with their respective development methodologies, concluding that the method is useful to the development of reconfigurable microwave planar filters for potential applications in the frequency ranges sub-6 GHz for 5G.Acesso AbertoFiltros Planares de MicroondasPassa-faixaRejeita-faixaReconfiguraçãoDiodo varactor5G New RadiomasterThesis