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.
