Desarrollar un sistema de recepción de televisión digital satelital que permita mejorar la calidad de servicio fundamentado en el estándar DVB-S.

Abstract

In this document, a DVB-S standard study (EN 300-421) has been carried out, which allows identifying the parameters that govern the transmissions of digital signals via satellite. Likewise, the analysis of investigations carried out with microstrip antennas that we consider that is relevant to the development of this document. Then, the analysis, design, and implementation of a microstrip antenna with refractory arrangement composed of a set of 7x7 circular patches was performed and as a dielectric substrate; Bakelite was used that has a relative permittivity Er = 4.8 and thickness of 1.6 mm, all this to implement a digital satellite television reception system. For the design of the refractory array antenna, the disposition of each patch was considered, as well as its diameter, which made each one reflect the incident wave with a different phase, with which it was possible to concentrate energy at a point at 35 cm from the center of the reflector; that is, to the LNB. Each patch has a separation of 0.9 wavelengths, for this distance, the wavelength is considered in a vacuum. This antenna operates with the downlink frequency used by the Amazonas satellite which was 12 GHz (Ku band). Thus, it has a 6.25% bandwidth for 12 GHz. Once the microstrip antenna was built, the satellite digital television reception system was implemented to measure the parameters of the signal obtained from satellite, which allowed a balance between the implemented microstrip antenna and an offset antenna, which led to consider that the quality of service based on the DVB-S standard was improved.