Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-08-01T12:09:07Z No. of bitstreams: 1 HenriqueAdlerMedeirosSilva_DISSERT.pdf: 3341133 bytes, checksum: 3b8e866b113d4ccdbb658813901b5585 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-08-03T19:09:56Z (GMT) No. of bitstreams: 1 HenriqueAdlerMedeirosSilva_DISSERT.pdf: 3341133 bytes, checksum: 3b8e866b113d4ccdbb658813901b5585 (MD5) / Made available in DSpace on 2017-08-03T19:09:56Z (GMT). No. of bitstreams: 1 HenriqueAdlerMedeirosSilva_DISSERT.pdf: 3341133 bytes, checksum: 3b8e866b113d4ccdbb658813901b5585 (MD5) Previous issue date: 2017-07-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A engenharia bioinspirada ? um campo de pesquisa interdisciplinar, que inclui ?reas espec?ficas, tais como: biologia, engenharia, ci?ncias f?sicas e biomim?tica. As m?ltiplas e bem-sucedidas aplica??es, na engenharia moderna, de sistemas inspirados em mecanismos da pr?pria biologia, t?m incentivado os pesquisadores de telecomunica??es a utilizar a engenharia bioinspirada no aprimoramento dos circuitos de comunica??o sem fio. Nesse sentido, essa disserta??o procura investigar a aplica??o das anatomias naturais das plantas em antenas de microfita. Al?m disso, ? apresentada uma antena fractal de opera??o multibanda, com modelo criado a partir de fun??o iterativa, conhecido como a ?rvore Pitag?rica. As antenas foram projetadas em substrato FR-4 de fibra de vidro/ep?xi com constante diel?trica de 4,4 e espessura de 1,57 mm. As estruturas foram caracterizadas com a ferramenta de an?lise Ansoft Designer, a qual implementa o m?todo dos momentos (MoM). Prot?tipos foram fabricados e medidos em um analisador de rede vetorial. Boa concord?ncia entre os resultados medidos e simulados foi verificada. / Bioinspired engineering is an interdisciplinary field of research, which includes specific areas such as: biology, engineering, physical sciences and biomimetics. The multiple and successful applications, in modern engineering, systems inspired by biology's own mechanisms, have encouraged telecom researchers to use bio-inspired engineering to improve wireless communication circuits. In this sense, this dissertation tries to investigate the application of the natural anatomy of the plants in microstrip antennas. In addition, a fractal antenna of multiband operation is presented, with a model created from an iterative function, known as the Pythagorean Tree. The antennas were designed on fiberglass/epoxy FR-4 substrate with a dielectric constant of 4.4 and thickness of 1.57mm. The structures were characterized with the analysis tool Ansoft Designer, which implements the method of moments (MoM). Prototypes were fabricated and measured in a vector network analyzer. Good agreement between the measured and simulated results was verified