Uma Nova Abordagem para o Projeto e Simulação Numérica do Comportamento de Filtros Helicoidais na Faixa de VHF

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This thesis develops a grounded study on the design and determination of an equivalent and adequate passive circuit in concentrated parameters for a numerical simulation of band-pass behavior of helical resonators coupled in cascade. It was done a condensation of the existent bibliography and an adequate design sequence for implementation was structured, from which was developed a program through the Matlab. Considering the availability of the materials in the national market, the assembly process for a prototype was established and some mechanism for the resonators tuning and to set the coupling aperture between the cavities were implemented. Through the developed prototype, the numerical simulations and the experimental tests, it was found out a representative theoretical model for the device behavior. It was sought to entail the electro-magnetic field distribution into the cavity with an equivalent electric circuit where the dimensions characteristics of the coupling aperture between resonators are represented by reactive circuit elements in concentrated parameters. The equivalent circuit was simulated through the Advanced Design System ADS program, from Agilent, obtaining similar results as those calculated specifications from Matlab. To conclude, this work provides procedures for the design and numerical simulation, which are able to help in the development stage and for an industrial manufacture of this kind of filter.

ASSUNTO(S)

vhf telecomunicacoes filtro de cavidades helical filter acoplamento vhf quality factor coupling fator de qualidade cavity filter filtro helicoidal

ACESSO AO ARTIGO

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