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Divisor de frequĂȘncia de 10MHz para 5MHz
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Abstract(s)
A elaboração deste trabalho, realizado em contexto de estĂĄgio, foi fundamental, tanto a nĂvel pessoal como a nĂvel profissional, pela experiĂȘncia adquirida no setor das telecomunicaçÔes, mais precisamente, nas telecomunicaçÔes por satĂ©lite. O Grupo Eutelsat Ă© lĂder europeu e um dos trĂȘs maiores operadores de telecomunicaçÔes por satĂ©lite a nĂvel mundial. No Ăąmbito da sua atividade, fornece uma vasta gama de serviços de telecomunicaçÔes atravĂ©s da sua frota de satĂ©lites, de entre os quais se destacam a difusĂŁo de televisĂŁo, o acesso Ă Internet e as redes de comunicaçÔes empresariais. Realizar um estĂĄgio nesta empresa e participar nas rotinas diĂĄrias, foi muito enriquecedor, tanto a nĂvel acadĂ©mico como profissional. Um dos aspetos importantes a referenciar foram os conhecimentos adquiridos no decurso do estĂĄgio atravĂ©s da familiarização dos materiais utilizados na empresa onde abrangem essencialmente a gama da radiofrequĂȘncia. O presente trabalho consistiu na criação de um divisor de frequĂȘncia, tendo como objectivo converter um sinal com frequĂȘncia de 10 MHz para um sinal com 5 MHz. Assim, apresenta-se o projeto do divisor de frequĂȘncia, bem como dos seus elementos constituintes. O projeto Ă© simulado e, usando modelos apropriados para os componentes, consegue-se prever o comportamento da saĂda e consequente redução dos harmĂłnicos. Deste modo, Ă© permitido retirar conclusĂ”es relativamente aos valores obtidos experimentalmente.
The elaboration of this work carried out in an internship context was fundamental, both personally and professionally, for the experience gained in the telecommunication sector, most precisely in satellite telecommunications. The Eutelsat group is the European leader and one of the largest operators of telecommunications satellites worldwide. In the scope of its activity if provides a wide range of telecommunications broadcast services through its fleet of satellites, including television broadcast, Internet access and corporate communications networks. Taking an internship in this company and participating in the daily routines was a very enriching experience. One of the important aspects to refer, was the knowledge acquired during the internship through the familiarization of the materials used in the company where they essentially cover the range of radiofrequency. The present work consisted in the creation of a frequency divider, aiming at converting a signal with frequency of 10MHz to a signal with 5MHz. This shows the design of the frequency divider as well as its constituent elements. The design is simulated and using appropriate models for the components it is possible to predict the behavior of the output and consequent reduction of harmonics. In this way it is allowed to draw conclusions regarding to the values obtained experimentally.
The elaboration of this work carried out in an internship context was fundamental, both personally and professionally, for the experience gained in the telecommunication sector, most precisely in satellite telecommunications. The Eutelsat group is the European leader and one of the largest operators of telecommunications satellites worldwide. In the scope of its activity if provides a wide range of telecommunications broadcast services through its fleet of satellites, including television broadcast, Internet access and corporate communications networks. Taking an internship in this company and participating in the daily routines was a very enriching experience. One of the important aspects to refer, was the knowledge acquired during the internship through the familiarization of the materials used in the company where they essentially cover the range of radiofrequency. The present work consisted in the creation of a frequency divider, aiming at converting a signal with frequency of 10MHz to a signal with 5MHz. This shows the design of the frequency divider as well as its constituent elements. The design is simulated and using appropriate models for the components it is possible to predict the behavior of the output and consequent reduction of harmonics. In this way it is allowed to draw conclusions regarding to the values obtained experimentally.
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Keywords
Divisor de frequĂȘncia Divisores de frequĂȘncia digitais Divisores de frequĂȘncia regenerativos Divisores de frequĂȘncia paramĂ©tricos fft (Fast Fourier Transforma, transformada rĂĄpida de Fourier) RadiofrequĂȘncia Flip-flop D ReferĂȘncia externa Engenharia de ElectrotĂ©cnica e TelecomunicaçÔes . Faculdade de CiĂȘncias Exatas e da Engenharia