Abstract
In this paper, topographic data for line-of-sight (LOS) communication link between Eket and Akwa Ibom state University are used to validate the frequency scaling factors for computing the radius of the Fresnel zone, Fresnel-Kirchoff diffraction parameter and the number of Fresnel zones that are partially or fully blocked by single knife edge obstruction in the signal path. The topographic data are obtained using Geocontext online topographic profile tool. In this paper, three microwave frequencies are considered, namely; 4 GHz for the C-band, 16 GHz for the Ku-band and 28 GHz for the Ka-band. The results confirmed that the frequency scaling factor between any two frequencies, f1 and f2 is for the Fresnel-Kirchoff diffraction parameter; for the radius of the Fresnel zone and for the number of Fresnel zones that are blocked by obstruction in the signal path. Consequently, if the value of any of the three parameters is known at frequency, f1, then the corresponding value of the same parameter at another frequency, f2 can be obtained by multiplying the parameter value at f1 with the frequency scaling factor for the parameter.
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