microrowave Link Design Between Main Compus And Agaro branch

Abstract

Microwaves are widely used for point to point communications, because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna. This allows nearby microwave equipment to use the same frequencies without interfering with each other. Microwave links provide the bulk of the interconnectivity between sites in telecommunications networks, especially mobile voice and data networks, because they are rapidly deployable, relatively small and require fewer infrastructures out by than technologies such as optical fiber transmission. The aim of the thesis was to provide microwave radio link operating at microwave frequencies Jimma main and Agaro campuses, with the minimum objective reliability 99.999%. The designed link depends on Geo context-profiler for path profile analysis, Feko suite 5.5 for rectangular waveguide design and link budget calculator. In the analysis there are some parameters, which are significant in design of microwave link establishment: free space loss calculation, path profile analysis, fades margin, frequency planning, attenuation, rain fading predictions, reflection point calculation, tower heights, Signal to Noise Ratio, Fresnel zone and link budget calculation. Fresnel zone clearance was considered at least at 60% of the first Fresnel zone. To achieve the performance of the link antennas are placed on a tower at sufficient to provide clear line of sight between the transmitter and receiver sites.