Operador integral aplicado à caracterização espaço-temporal de antenas refletoras

• Ano de defesa: 2017
• Autor(a) principal: Stefânia de Sousa Faria
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Método da abertura; Ótica; Análise espaço-temporal; geometrica; Operador integral; Alimentador cosseno elevado modificado; Antenas refletoras; Operadores integrais; Engenharia elétrica; Análise de domínio temporal
• Link de acesso: http://hdl.handle.net/1843/BUOS-ATLKYU

In this work, it is developed a closed-formulation to calculate the radiated field by a perfectly conducting parabolic reflector antenna. This analytical solution is manipulated in time-domain in order to find equations to integral operator through the Geometrical Optics and the Aperture Method. Such operator, when associated to general sources by means of a temporal convolution, provides the field radiated by the antenna, such as to near field regions as to far field regions. In this calculation, it was employed the modified raised cosine feeder in order to obtain a generic formulation using any value for the n exponent. The obtained results also allow the analysis of transient phenomenons to different sources of temporal behaviour. Due to the high level of complexity in the integral calculation processes, it was used a commercial software associated to a packet with more than 6000 additional integration rules to solve the problem.