Antenas de microlinha multibanda

• Autor(a) principal: Geraldo, Felipe de Castro [UNESP]
• Data de Publicação: 2018
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156793; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-06-25/000902299.pdf
• topic: Antenas de microondas; Linhas de transmissão em fita; Telecomunicações; Microwave antennas; Strip transmission lines; Telecommunication

Modern wireless communications systems are going through a period of great growth and innovation that is because the development of new technologies. Nowadays, microstrip antennas are being demanded by the market due to the manufacturing low cost and the ability to operate across the whole microwave spectrum, besides the ability of multiband operation. In this work we present a study of the microstrip antennas in particular about those with a rectangular patch. The first antenna model was designed and analyzed for a 2.4GHz operating frequency using the Finite Element Method (FEM) in the ANSYS HFSS simulation software. The second stage of the study was focused around multiband antennas, where a rectangular micropostrip antenna should be designed to operate in multiband (1.8, 2.4 and 5.2 GHz). That is why a U-shaped slot was used in its conductive patch. The proposed antenna model was designed, analyzed and finally optimized through the HFSS software, by means of several parametric analysis. With these analysis it was possible to observe the behavior of the resonance frequencies, reflection coefficient, radiation pattern, input impedance, which were dependent on the dimensions of the patch and the size of the inserted slot. At last, simulated theoretical results (ANSYS HFSS) are presented, demonstrating good agreement with the objectives sought in the design phase and showing similar ones that are presented in the literature