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Title: Rainfall cross - polarisation at microwave frequencies (Rainfall cropo-polarisation is evaluated at microwave frequencies for linear and circular orthogonal polarisations taking both differential phase and amplitide into account A comparison with measurem
Author: Arbabi, M.
ISNI:       0000 0001 3426 2787
Awarding Body: University of Bradford
Current Institution: University of Bradford
Date of Award: 1974
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The scattering functions for oblate spheroidal raindrops of various eccentricities are evaluated by a perturbation method. The resulting attenuation and phase rotation due to rain-filled media is computed for frequencies ranging from 3 to 36 GHz, using empirical data on drop size distribution. The attenuation and phase variations are calculated for polarisations along the major and the minor axis of the raindrops. The difference in the attenuation and the phase between the two polarisations is used to evaluate the cross-polarisation level in the case of linear and circular polarisation. The attenuation and phase rotation is also considered for the case of slant path propagation. Comparison is made between the theory and experimental data obtained at 11 GHz (Bradford University link), and at other frequencies. Bearing in mind the complexity of the media, the theoretical results are found to be in a reasonable agreement with the experimental data. In addition it is seen from the theory that the linear orthogonal mode of propagation will give superior isolation to that of circular polarisation.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available