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Nova scientia

On-line version ISSN 2007-0705


LEIJA HERNANDEZ, Gabriela; LOPEZ BONILLA, José Luis  and  ITURRI HINOJOSA, Luis Alejandro. Methodology to properly calculate the heights of the antennas in a line-of-sight microwave link. Nova scientia [online]. 2014, vol.6, n.12, pp.1-12. ISSN 2007-0705.

The methodology to properly calculate the heights of the antennas above the surface of the Earth in a line-of-sight (LOS) microwave link from its radio profile is presented. The effect of the Earth's atmosphere on RF signals, the effective Earth radius factor for Mexico and the analysis of the first Fresnel zone are described. With the proper position of the antennas ensuring clearance of the first Fresnel zone the proper reception of transmitted beams arriving from different paths to the antenna at the other end, all in phase with the direct beam in LOS is achieved.

Keywords : LOS radio link profile; first Fresnel zone; antennas height.

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